CT scanning device for large-size workpiece
By designing a CT scanning device for large-sized workpieces, and combining slip rings and area array detectors, stable support and automatic movement of large and complex structural workpieces are achieved, solving the problem of lack of adaptable devices in existing technologies and supporting multiple imaging modes.
Patent Information
- Application Number
- CN202422913479.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-27
AI Technical Summary
Existing industrial CT equipment is difficult to support helical cone-beam CT imaging of large and complex workpieces, especially when the workpieces are heavy and bulky, there is a lack of suitable detection devices.
A CT scanning device was designed, comprising a loading platform, a unloading platform, a shielded chamber, an inspection platform, and a rotating frame. By combining slip rings and area array detectors, and setting up light curtains and positioning light curtains, the device enables automatic movement and positioning of the workpiece under inspection, ensuring stable support and movement of the workpiece during the CT imaging process.
It enables stable support and movement of large and complex structural workpieces, ensures automatic control of through-type CT cone-beam imaging, and supports multiple imaging modes, including spiral cone-beam CT, fixed X-ray imaging, and cone-beam CT.
Smart Images
Figure CN223664543U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to CT imaging device design technical field especially, it is a kind of CT scanning device for large-size workpiece. BACKGROUND
[0002] In the field of industrial CT detection imaging, in order to obtain more fine detection precision and imaging effect, the industry attempts to study the combination of slip ring and area array detector to realize through type cone beam CT scanning imaging. But the existing slip ring is basically used in medical field, there is no industrial object workpiece detection engineering supporting device matched with it, and moreover, the current industrial CT cone beam scanning demand gradually expands to the field of large, complex structure workpiece detection, large, complex structure workpiece is heavy, bulky, occupies large space, spiral cone beam scanning needs to be carried out through type, requires higher, and urgently needs the device that can support large, complex structure workpiece to carry out spiral cone beam CT imaging. SUMMARY
[0003] In view of the above analysis, the utility model aims at providing a kind of CT scanning device for large-size workpiece to solve the problem that the existing device that can support large, complex structure workpiece to carry out spiral cone beam CT imaging is lacked.
[0004] The utility model mainly aims to realize through the following technical scheme:
[0005] The device includes loading platform, unloading platform, shielding cabin, detection table, rotating rack, wherein,
[0006] The shielding cabin is provided with cabin door and exit door;
[0007] The loading platform is arranged outside the cabin door;
[0008] The unloading platform is arranged outside the exit door;
[0009] The rotating rack is arranged in the shielding cabin, and the rotating rack is provided with a slip ring, an area array detector and a ray source, wherein the area array detector and the ray source are arranged on the centripetal surface of the slip ring rotor;
[0010] The detection table is arranged in the shielding cabin through the slip ring, and the two ends are in contact with the inner side of the cabin door and the exit door respectively.
[0011] Based on the further improvement of the above scheme, the device further comprises a first transverse light curtain, a first longitudinal light curtain, a second transverse light curtain, a second longitudinal light curtain, and a host computer; the first transverse light curtain and the first longitudinal light curtain are arranged on both sides of the entrance and exit of the cabin door; the second transverse light curtain and the second longitudinal light curtain are arranged on both sides of the entrance and exit of the cabin door; and the first transverse light curtain, the first longitudinal light curtain, the second transverse light curtain, and the second longitudinal light curtain are connected to the host computer.
[0012] Based on the further improvement of the above scheme, the side of the sliding ring towards the cabin door is further provided with a positioning light curtain connected to the host computer.
[0013] Based on the further improvement of the above scheme, the feeding table and the discharging table are each provided with a conveyor belt, an extension support rod, and a lifting rod; four top corners of an inner wall fixed structure at the bottom of the conveyor belt are respectively connected to one extension support rod, and the center of the bottom is connected to the lifting rod; and the conveyor belt and the lifting rod of the feeding table and the discharging table are electrically connected to the host computer.
[0014] Based on the further improvement of the above scheme, the conveyor belt of the feeding table and the discharging table is a metal conveyor belt.
[0015] Based on the further improvement of the above scheme, the detection table is provided with a conveyor belt, a lifting support rod, and a lifting rod; four top corners of an inner wall fixed structure at the bottom of the conveyor belt are respectively connected to one lifting support rod, and the center of the bottom is connected to the lifting rod; and the conveyor belt and the lifting rod of the detection table are electrically connected to the host computer.
[0016] Based on the further improvement of the above scheme, the conveyor belt of the detection table is a low-density material conveyor belt.
[0017] Based on the further improvement of the above scheme, the first transverse light curtain, the first longitudinal light curtain, the second transverse light curtain, the second longitudinal light curtain, and the positioning light curtain each comprise a light emitting array and a light receiving array; the light emitting array comprises a plurality of light emitters, the light receiving array comprises a plurality of light receivers, and the light emitters and the light receivers are one-to-one corresponding and oppositely arranged.
[0018] Based on the further improvement of the above scheme, the light emitting array and the light receiving array of the first transverse light curtain are arranged on the left and right sides of the outside of the cabin door, the first longitudinal light curtain is arranged on the upper and lower sides of the inside of the cabin door; the light emitting array and the light receiving array of the second transverse light curtain are arranged on the left and right sides of the outside of the cabin door, the second longitudinal light curtain is arranged on the upper and lower sides of the inside of the cabin door; and the light emitting array and the light receiving array of the positioning light curtain are arranged on the upper and lower positions or the left and right positions of the entrance side of the sliding ring.
[0019] Based on the further improvement of the above scheme, the cabin door and the exit door are electrically connected to the host computer.
[0020] Compared with the prior art, the utility model at least can realize following beneficial effect one:
[0021] 1, set up in the loading platform of the shield cabin entrance door outside, set up in the unloading platform of the shield cabin exit door outside, pass through the detection platform of the slip ring on the rotating frame in the shield cabin, constitute with the detected workpiece mobile transport structure of the slip ring CT cone beam imaging structure adaptation, ensure that the detected workpiece can be stably supported and moved in the CT cone beam imaging process.
[0022] 2, the first transverse light curtain, first longitudinal light curtain of setting in the entrance door inside and outside two sides are connected with the upper computer, realize the measurement to the detected workpiece size, and the automatic control to the entrance door opening / closing;The second transverse light curtain, second longitudinal light curtain of setting in the exit door inside and outside two sides are connected with the upper computer, realize the automatic control to the exit door opening / closing, ensure that the detected workpiece can pass through the entrance door, exit door safely, help to realize the automatic control of the detected workpiece movement process.
[0023] 3, the positioning light curtain of setting in the slip ring towards the entrance door one side is connected with the upper computer, can detect the detected workpiece and move into the slip ring center, help to realize the process control of the through type CT cone beam scanning.
[0024] In the utility model, the above-mentioned each technical scheme can be combined mutually, to realize more preferred combination scheme.The other features and advantages of the utility model will be described in the following content, and part of the advantages can become apparent from the specification, or be understood by implementing the utility model.The purpose and other advantages of the utility model can be realized and obtained by the content specially pointed out in the text and the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0025] The drawings are only for the purpose of showing specific embodiments, and are not considered as limiting the utility model, and in the whole drawings, the same reference signs represent the same parts.
[0026] Figure 1 It is the structure schematic view of the cone beam CT imaging device of the utility model embodiment.
[0027] Figure 2 It is the position and structure schematic view of each light curtain of the utility model embodiment. PREFERRED EMBODIMENT
[0028] The preferred embodiment of the utility model will be described in detail below in conjunction with the drawings, wherein, the drawings constitute a part of this application, and be used together with the embodiment of the utility model to explain the principle of the utility model, and not be used to limit the scope of the utility model.
[0029] The utility model discloses a specific embodiment for a CT scanning device for large size work piece, as Figure 1 As shown.
[0030] The device includes a feeding table, a discharging table, a shielding cabin, a detection table and a rotating frame, wherein,
[0031] The shielding cabin wall is provided with an entry cabin door and an exit cabin door.
[0032] The feeding table is arranged outside the entry cabin door.
[0033] The discharging table is arranged outside the exit cabin door.
[0034] The rotating frame is arranged in the shielding cabin, and a slip ring, a surface array detector and a ray source are arranged on the rotating frame, wherein the surface array detector and the ray source are oppositely arranged on the slip ring rotor centripetal surface.
[0035] The detection table is arranged in the shielding cabin through the slip ring and is in contact with the inner side of the entry cabin door and the inner side of the exit cabin door respectively.
[0036] The utility model discloses a cone beam CT imaging device based on a slip ring for cone beam CT imaging, wherein the slip ring is arranged on the rotating frame, generally, the rotating frame further comprises a bearing for connecting the slip ring and the rotating frame, and a base for fixing the rotating frame and the slip ring to form an integrated structure, wherein the slip ring can rotate based on the bearing, the rotating frame and the base are fixed, the surface array detector and the ray source are oppositely arranged on the slip ring rotor centripetal surface, a ray cone beam generated by the ray source passes through the slip ring center to reach the oppositely arranged surface array detector, and the surface array detector detects the ray cone beam projected by the ray source to obtain a scanning image. Figure 1 A preferred scheme of the embodiment is shown in the figure, wherein the shielding cabin is in the shape of a cube, the entry cabin door and the exit cabin door are arranged on the left and right two side walls of the shielding cabin, and the entry cabin door and the exit cabin door are preferably lead doors with radiation shielding effect. In actual implementation, the shape of the shielding cabin and the setting position of the entry cabin door and the exit cabin door on the shielding cabin can be set to corresponding shapes according to the industrial application requirements and actual situation of the production line and the detection line, and the entry cabin door and the exit cabin door are arranged at corresponding positions of the shielding cabin. Preferably, the shielding cabin is in the shape of a rectangle.
[0037] The feeding table is arranged outside the entry cabin door, and the discharging table is arranged outside the exit cabin door.
[0038] Specifically, the loading platform is located outside the entrance door and the unloading platform is located outside the exit door. This is based on the application requirements of through-type cone-beam CT imaging. The purpose is to properly place the workpiece to be inspected through the loading platform and transport the workpiece to the shielded cabin before entering the entrance door. After the workpiece is inspected, it is properly transported out through the exit door after being completely removed from the shielded cabin.
[0039] Furthermore, both the loading platform and the unloading platform are equipped with a conveyor belt, a telescopic support rod, and a lifting rod. The bottom inner wall of the conveyor belt is fixed with one telescopic support rod at each of its four apex corners, and the bottom center is connected to the lifting rod. The conveyor belt and lifting rod of the loading platform and the unloading platform are all connected to the upper electromechanical system.
[0040] Specifically, the loading and unloading platforms are equipped with conveyor belts. The conveyor belts have a fixed structure at their bottom, optionally a rectangular plate or a frame with a rectangular bottom plane. Each of the four corners is connected to a telescopic support rod, and a lifting rod is connected to the center of the bottom to jointly support the conveyor belt. When the lifting rod rises / falls, all telescopic support rods rise / fall synchronously, forming a stable support, conveying, and lifting structure. The loading and unloading platforms are also electrically connected to a host computer. The purpose is to allow the host computer to send corresponding control signals to start / stop the conveyor belt movement of the loading and unloading platforms, or to adjust the height of the loading and unloading platforms, thereby enabling the safe movement of the inspected object into and out of the shielded chamber via the loading and unloading platforms.
[0041] Furthermore, both the loading and unloading conveyor belts are metal conveyor belts. This is to ensure more stable movement of the object being inspected.
[0042] Furthermore, such as Figure 2 As shown, the device further includes a first horizontal light curtain, a first vertical light curtain, a second horizontal light curtain, and a second vertical light curtain; the first horizontal light curtain and the first vertical light curtain are disposed on the inside and outside sides of the entrance door; the second horizontal light curtain and the second vertical light curtain are disposed on the inside and outside sides of the exit door; the first horizontal light curtain, the first vertical light curtain, the second horizontal light curtain, and the second vertical light curtain are all connected to the host computer.
[0043] Furthermore, the light emitting array and light receiving array of the first transverse light curtain are arranged on the left and right sides outside the entrance door, and the first longitudinal light curtain is arranged on the upper and lower sides inside the entrance door; the light emitting array and light receiving array of the second transverse light curtain are arranged on the left and right sides outside the exit door, and the second longitudinal light curtain is arranged on the upper and lower sides inside the exit door; the light emitting array and light receiving array of the positioning light curtain are arranged at the upper and lower or left and right positions on the slip ring entrance side.
[0044] Furthermore, the first horizontal light curtain, the first vertical light curtain, the second horizontal light curtain, the second vertical light curtain, and the positioning light curtain all include a light emitting array and a light receiving array. The light emitting array includes multiple light emitters, and the light receiving array includes multiple light receivers. The light emitters and light receivers are arranged in a one-to-one correspondence and facing each other.
[0045] Specifically, the first horizontal light curtain, the first vertical light curtain, the second horizontal light curtain, and the second vertical light curtain include multiple light emitting sources and light receivers. The light emitting sources are arranged sequentially, and each light emitting source is paired with a uniquely corresponding light receiver. Each pair of light emitting sources and light receivers is marked with a position point. Light rays emitted from the light emitting sources reach the corresponding light receivers to form a light curtain planar detection domain. Preferably, the light curtain plane is parallel to the slip ring plane. When the object being tested passes through the light curtain and blocks the light rays, the position point corresponding to the blocked light rays is recorded. By calculating the distance between the farthest blocked position points, the first horizontal light curtain can obtain the horizontal cross-sectional height of the workpiece passing through the light curtain, and the first vertical light curtain can obtain the horizontal cross-sectional width of the workpiece. Based on the height and width of the workpiece detected by the first horizontal and first vertical light curtains, it is convenient to locate the workpiece and calculate the horizontal and vertical position offsets, so that the detection platform can subsequently adjust the horizontal and vertical positions of the workpiece based on the height and horizontal position offsets to move it to the detection position.
[0046] The first horizontal light curtain and the first vertical light curtain can also be used to detect the state of the inspected workpiece approaching / leaving the inlet door, and the second horizontal light curtain and the second vertical light curtain are used to detect the state of the inspected workpiece approaching / leaving the outlet door. When the inspected workpiece approaches the inlet door from the outside and passes through the first horizontal light curtain or the first vertical light curtain, the blocked light curtain generates a first blocking state signal and sends it to the host computer.
[0047] Furthermore, both the entry door and the exit door are connected to the host electromechanical system.
[0048] The host computer opens the inlet door based on the first obstruction signal. The workpiece to be inspected is conveyed by the loading platform conveyor belt through the inlet door and is safely received by the inspection platform, which continues to convey the workpiece into the cabin. The light curtain set inside the inlet door detects and generates a second obstruction signal and sends it to the host computer. The inlet door will only close when the workpiece passes through the light curtain inside the inlet door and the second obstruction signal disappears. The host computer accurately controls the opening and closing of the inlet door by accurately detecting the status of the workpiece passing through the inlet door based on the first horizontal light curtain and the first vertical light curtain. The second horizontal light curtain and the second vertical light curtain set on the inside and outside of the outlet door have the same function.
[0049] After the workpiece is passed through the entry door, it is safely received by the conveyor belt of the inspection station.
[0050] Furthermore, the testing platform is equipped with a conveyor belt, lifting support rods, and lifting rods. The four corners of the fixed structure on the bottom inner wall of the conveyor belt are each connected to a lifting support rod, and the center of the bottom of the conveyor belt is connected to the lifting rod. The conveyor belt and lifting rods of the testing platform are both electrically connected to the host computer.
[0051] The inspection station is located inside the shielded chamber, passing through the middle of the slip ring, with its two ends directly opposite the inside of the inlet and outlet doors, respectively. To ensure proper transport of the inspected workpiece, the inspection station is equipped with a conveyor belt. Given that the inspection station is located inside the shielded chamber and passes through the scanning area of the slip ring, the material used for the conveyor belt should avoid affecting the scanning imaging.
[0052] Furthermore, the conveyor belt of the testing platform is made of low-density material.
[0053] Preferably, the conveyor belt of the inspection table is made of high-strength, high-toughness, low-density steel, which has minimal impact on X-rays and sufficient toughness to ensure that the workpiece being inspected can be moved safely on the inspection table.
[0054] The specific shape and length of the conveyor belt of the inspection table are related to the path shape of the workpiece being inspected within the shielded cabin. The bottom support structure of the inspection table and the four corners of the bottom inner wall fixing structure of the shielded cabin must be connected to a lifting support rod, and a lifting rod is connected to the bottom center. The lifting rod is connected to the host computer so that the workpiece being inspected can be adjusted to the inspection height by adjusting the height of the conveyor belt.
[0055] Furthermore, such as Figure 2 As shown, a positioning light curtain is also provided on the side of the slip ring facing the entry door, and the positioning light curtain is connected to the host computer.
[0056] Specifically, the positioning light curtain is preferably located on the side of the detection platform near the slip ring facing the entrance door. Optionally, the positioning light curtain is a horizontal light curtain, wherein the light emitting source and the light receiver of the positioning light curtain are arranged in a longitudinal row on both sides of the detection platform, the plane of the light curtain is parallel to the plane of the slip ring and perpendicular to the plane of the detection platform conveyor belt.
[0057] Depending on the imaging method, the positioning light curtain can play different roles. When performing through-type spiral cone-beam scanning, it can be used to detect the workpiece entering the positioning light curtain and generate an occlusion signal to be sent to the host computer, enabling the host computer to control the spiral cone-beam scanning process during passage. When performing reciprocating X-ray imaging or cone-beam imaging, the positioning light curtain can also time the occlusion signal generated by the workpiece passing through the positioning light curtain and send it to the host computer. The host computer obtains the desired detection position by timing the occlusion signal and the size of the workpiece detected by the first transverse light curtain and the first longitudinal light curtain, and controls the detection stage to move the workpiece to the detection position to complete the imaging.
[0058] This embodiment discloses a CT scanning device for large-sized workpieces, comprising a shielded chamber. The shielded chamber has an inlet door and an outlet door. A loading platform is located outside the inlet door, and a unloading platform is located outside the outlet door. A first transverse light curtain and a first longitudinal light curtain are respectively installed on the inner and outer sides of the inlet door. A second transverse light curtain and a second longitudinal light curtain are respectively installed on the inner and outer sides of the outlet door. A detection platform is also installed inside the inlet door and the outlet door, passing through a slip ring. A positioning light curtain is also installed on the side of the slip ring facing the inlet door. The inlet door, outlet door, first transverse light curtain, first longitudinal light curtain, second transverse light curtain, second longitudinal light curtain, detection platform, and positioning light curtain are all present. The screens are all connected to the host computer, enabling the automatic movement of the inspected workpiece during the inspection process via the loading platform, inspection platform, and unloading platform. Based on the light curtain detection of the height and width of the inspected object and its status through the light curtain, the inspected object is located and moved to the inspection position. The opening and closing of the inlet and outlet doors are automatically controlled. After passing through the middle area of the slip ring, the inspected object is scanned by the area array detector and X-ray source set on the slip ring using various imaging methods such as through-type spiral cone-beam CT imaging, fixed X-ray imaging, or cone-beam CT imaging. This solves the problem of the lack of spiral cone-beam CT imaging devices that support large and complex workpiece structures in the existing technology.
[0059] It should be noted that the accompanying drawings in this embodiment are only used to illustrate the structure and function, and are preferred embodiments of the present invention. They are not intended to limit the specific implementation of the present invention.
[0060] Those skilled in the art will understand that the detection of the workpiece size and positioning of the first transverse light curtain, second transverse light curtain, first longitudinal light curtain, second longitudinal light curtain, and positioning light curtain in the above embodiments, as well as the control of the first transverse light curtain, first longitudinal light curtain, second transverse light curtain, second longitudinal light curtain, positioning light curtain, entry door, exit door, and detection platform by the host computer, and the program / software involved in the emission of the X-ray cone beam by the X-ray source and its detection and imaging by the area array detector, are common methods in the prior art. This utility model does not involve any software improvements. This utility model only requires connecting the various devices with corresponding functions through the connection relationships given in the embodiments of this utility model, without involving any program or software improvements. As for the connection methods between the various hardware devices with corresponding functions, they can all be implemented by those skilled in the art using existing technology, and will not be described in detail here.
[0061] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A CT scanning device for large-sized workpieces, characterized in that, The device includes a loading platform, a unloading platform, a shielded chamber, a testing platform, and a rotating frame, wherein... The shielded cabin is equipped with an entry door and an exit door; The loading platform is located outside the inlet door; The unloading platform is located outside the outlet door; The rotating frame is installed inside the shielded chamber. The rotating frame is equipped with a slip ring, an array detector, and a radiation source. The array detector and the radiation source are arranged opposite to each other on the centripetal surface of the slip ring rotor. The testing platform is installed inside the shielded cabin through the slip ring, with its two ends contacting the inside of the inlet door and the inside of the outlet door, respectively.
2. The CT scanning device for large-sized workpieces according to claim 1, characterized in that, The device further includes a first horizontal light curtain, a first vertical light curtain, a second horizontal light curtain, a second vertical light curtain, and a host computer; the first horizontal light curtain and the first vertical light curtain are disposed on the inside and outside sides of the entrance door; the second horizontal light curtain and the second vertical light curtain are disposed on the inside and outside sides of the exit door; the first horizontal light curtain, the first vertical light curtain, the second horizontal light curtain, and the second vertical light curtain are all connected to the host computer.
3. A CT scanning device for large-sized workpieces according to claim 2, characterized in that, A positioning light curtain is also provided on the side of the slip ring facing the entry door, and the positioning light curtain is connected to the host computer.
4. A CT scanning device for large-sized workpieces according to claim 3, characterized in that, Both the loading and unloading platforms are equipped with conveyor belts, telescopic support rods, and lifting rods. The bottom inner wall of the conveyor belt is fixed with one telescopic support rod at each of its four apex corners, and the bottom center is connected to the lifting rod. The conveyor belts and lifting rods of the loading and unloading platforms are all connected to the upper electromechanical system.
5. A CT scanning device for large-sized workpieces according to claim 4, characterized in that, Both the loading and unloading conveyor belts are metal conveyor belts.
6. A CT scanning device for large-sized workpieces according to claim 5, characterized in that, The testing platform is equipped with a conveyor belt, lifting support rods, and lifting rods. The four corners of the bottom inner wall fixing structure of the conveyor belt are each connected to a lifting support rod, and the bottom center of the conveyor belt is connected to the lifting rod. The conveyor belt and lifting rods of the testing platform are both electrically connected to the host computer.
7. A CT scanning device for large-sized workpieces according to claim 6, characterized in that, The conveyor belt of the testing platform is made of low-density material.
8. A CT scanning device for large-sized workpieces according to claim 2, characterized in that, The first horizontal light curtain, the first vertical light curtain, the second horizontal light curtain, the second vertical light curtain, and the positioning light curtain all include a light emitting array and a light receiving array. The light emitting array includes multiple light emitters, and the light receiving array includes multiple light receivers. The light emitters and light receivers are arranged in a one-to-one correspondence and facing each other.
9. A CT scanning device for large-size workpieces according to claim 8, characterized in that, The light emitting array and light receiving array of the first transverse light curtain are arranged on the left and right sides outside the entrance door, and the first longitudinal light curtain is arranged on the upper and lower sides inside the entrance door; the light emitting array and light receiving array of the second transverse light curtain are arranged on the left and right sides outside the exit door, and the second longitudinal light curtain is arranged on the upper and lower sides inside the exit door; the light emitting array and light receiving array of the positioning light curtain are arranged at the upper and lower or left and right positions on the slip ring entrance side.
10. A CT scanning device for large-sized workpieces according to claim 9, characterized in that, Both the entry door and the exit door are connected to the host computer.