Object detection device

Patent metadata

Field	Value
Publication number	US-2024053504-A1
Application number	US-202118260010-A
Country	US
Kind code	A1
Filing date	Nov 23, 2021
Priority date	Dec 31, 2020
Publication date	Feb 15, 2024
Grant date	—

Abstract

An object detection device is provided, including: a support structure, a ray source assembly, and a detector assembly. The support structure is configured to form a passageway for a passage of a detected object; the ray source assembly is configured to emit a ray; and the detector assembly includes a detector mounting frame connected to the support structure and a plurality of detection units arranged on the detector mounting frame, the detection unit being configured to receive a transmission ray penetrating the detected object and obtain a detection information based on the transmission ray; the support structure includes a vertical support arm having an adjustable height, and a vertical distance from the ray source assembly to a bottom portion of the support structure varies with a height of the vertical support arm. Another object detection device is further provided, including a ray source assembly, a detector assembly and a controller.

First claim

1 . An object detection device, comprising:
a support structure configured to form a passageway for a passage of a detected object; a ray source assembly configured to emit a ray; and a detector assembly comprising a detector mounting frame connected to the support structure and a plurality of detection units arranged on the detector mounting frame, the detection unit being configured to receive a transmission ray penetrating the detected object and obtain a detection information based on the transmission ray; wherein the support structure comprises a vertical support arm having an adjustable height, and a vertical distance from the ray source assembly to a bottom portion of the support structure varies with a height of the vertical support arm.

2 . The device according to claim 1 , wherein,
the ray source assembly comprises a ray source cabin connected to the support structure and a ray source located in the ray source cabin; and the ray source cabin has a plurality of emission positions, the ray source is configured to sequentially emit a ray from the plurality of emission positions to the detected object in the passageway, and centerlines of rays emitted from any two emission positions of the plurality of emission positions form an included angle to perform a multi-view transmission on the detected object.

3 . The device according to claim 2 , wherein the ray source is configured as one of:
the ray source is a movable ray source, and the movable ray source is configured to be sequentially moved to the plurality of emission positions and emit a ray; the ray source is a distributed ray source, the distributed ray source comprises a plurality of emission units corresponding to the plurality of emission positions one to one, and the plurality of emission units are configured to sequentially emit a ray; and the ray source comprises a plurality of independent ray sources, the plurality of independent ray sources are respectively arranged at the plurality of emission positions, and the plurality of independent ray sources are configured to sequentially emit a ray.

4 . The device according to claim 2 , wherein,
the vertical support arm comprises a first support arm and a second support arm, and each of the first support arm and the second support arm is a telescopic structure; the support structure further comprises a transverse cabin connected between the first support arm and the second support arm; and the ray source cabin is connected to the transverse cabin, and the ray source cabin is configured to move along an extending direction of the transverse cabin.

5 . The device according to claim 4 , wherein,
the transverse cabin is configured to house a cooling device and a controller; and the cooling device is configured to cool the ray source, and the controller is at least configured to control the ray source.

6 . The device according to claim 1 , wherein,
the detector mounting frame comprises a transverse mounting frame and a vertical mounting frame, and the vertical mounting frame comprises a first vertical mounting frame and a second vertical mounting frame respectively arranged on two sides of the transverse mounting frame; wherein a height of at least one of the first vertical mounting frame and the second vertical mounting frame is adjustable; or a height of at least one of the first vertical mounting frame and the second vertical mounting frame is variable with a height of the vertical support arm.

7 . The device according to claim 6 , wherein,
the vertical support arm comprises a first support arm connected to the first vertical mounting frame and a second support arm connected to the second vertical mounting frame; wherein a bottom portion of the first vertical mounting frame is rotatably connected to a bottom portion of the first support arm, and the first vertical mounting frame is configured to rotate around the bottom portion of the first support arm, so as to adjust a height of the first vertical mounting frame; and/or a bottom portion of the second vertical mounting frame is rotatably connected to a bottom portion of the second support arm, and the second vertical mounting frame is configured to rotate around the bottom portion of the second support arm, so as to adjust a height of the second vertical mounting frame.

8 . The device according to claim 7 , wherein,
the first support arm comprises a first support segment and a second support segment that is telescopic relative to the first support segment; and the first vertical mounting frame comprises a first mounting segment fixedly connected to the first support segment and a second mounting segment fixedly connected to the second support segment, so that a length of the first vertical mounting frame varies with a telescoping of the second support segment.

9 . The device according to claim 4 , wherein,
the plurality of emission positions are distributed in a plane perpendicular to a travelling direction defined by the passageway; and the ray source is arranged so that rays emitted at the plurality of emission positions are all coplanar with the plurality of detection units; wherein the ray source is configured so that rays emitted at partial emission positions of the plurality of emission positions are incident at least from a top portion of the detected object, and rays emitted by the ray source at partial emission positions of the plurality of emission positions are incident at least from a second side edge of the detected object.

10 . The device according to claim 9 , wherein,
a connecting line of the plurality of emission positions is in an arc shape or a zigzag shape, wherein a vertical distance from an emission position at a first end to a bottom portion of the support structure is greater than a vertical distance from an emission position at a second end to the bottom portion of the support structure; and the ray source assembly is located in a corner area of the support structure and is close to a top portion and a second side portion of the support structure.

11 . The device according to claim 1 , wherein,
the vertical support arm comprises a first support arm and a second support arm, and the ray source assembly is connected between the first support arm and the second support arm; wherein the support structure further comprises a base seat connected to the first support arm and the second support arm, each of the first support arm and the second support arm is configured to rotate relative to the base seat, and during a rotation of the first support arm and the second support arm relative to the base seat, a height of the ray source assembly varies; or wherein each of the first support arm and the second support arm is a telescopic structure, and during a telescoping process of the first support arm and the second support arm, the height of the ray source assembly varies.

12 . The device according to claim 2 , further comprising:
a controller configured to control the ray source to sequentially emit a ray from the plurality of emission positions to the detected object, and control the plurality of detection units to sequentially obtain a detection information corresponding to a ray emitted from each emission position; and a processor configured to obtain a scanned image at a viewing angle corresponding to each emission position according to the detection information, and perform a three-dimensional reconstruction processing according to the scanned image at a viewing angle corresponding to each emission position.

13 . The device according to claim 3 , wherein,
the ray source assembly further comprises a collimator, the collimator b

Assignees

• Nuctech Co Ltd

Inventors

• Ma Yuan
• Liu Lei
• Wang Weizhen
• Song Quanwei
• Gong Lingjun
• Zhu Xinbo
• Du long
• Xu Guangming
• Zhai Xingliang
• Hou Lina
• Sun Shangmin
• Zong Chunguang
• Hu Yu

Classifications

• G01N23/04

  and forming images of the material · CPC title

• G01V5/22 Primary

  Active interrogation, i.e. by irradiating objects or goods using external radiation sources, e.g. using gamma rays or cosmic rays · CPC title

• G01V5/00 Primary

  Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity · CPC title

• G01V5/0008 Primary

  Physics · mapped topic

• G01V5/20 Primary

  Detecting prohibited goods, e.g. weapons, explosives, hazardous substances, contraband or smuggled objects · CPC title