One-dimensional coding imaging device

Abstract

The utility model discloses a one-dimensional coding imaging device which comprises a rotary table support, an R-axis rotary sliding table, a one-dimensional coding plate assembly, a detector, a detector support, a U-shaped connecting arm, an annular base, a hollow motor and a coding plate mounting seat. The device is provided with the two reading devices, the R-axis rotary sliding table and the hollow motor encoder, the R-axis rotary sliding table is located at the top of the device, physical reading of data is facilitated, the one-dimensional coding plate assembly is of an annular closed structure, a detector and the one-dimensional coding plate assembly can be located on the same axis through the hollow motor, and the detection accuracy is improved. And the one-dimensional coding plate rotary detector can be kept relatively static, so that external connection of detector wires can be facilitated, interference is avoided, and stability of detector signals is ensured. The device provided by the utility model can be realized through manual rotation, automatic rotation and mechanical rotation of scales, and is simple and compact in structure.

Description

Technical Field

[0001] This utility model relates to the field of coded imaging technology, specifically to a one-dimensional coded imaging device. Background Technology

[0002] With the rapid development of China's nuclear technology application industry, nuclear safety has become an indispensable part of national security. Timely detection of runaway or leaked nuclear and radioactive materials is crucial for maintaining social stability, ensuring personnel safety, and minimizing economic losses. Therefore, it is necessary to develop real-time, low-noise radiation imaging equipment to provide essential technical support for nonproliferation and nuclear safety.

[0003] Commonly used radiation imaging equipment typically employs planar encoders and position-sensitive detectors to image radiation sources. This type of imaging system can rapidly image radiation sources and has good angular resolution and signal-to-noise ratio. However, these devices can usually only image the radioactive distribution within a single side and a specific field of view (FOV). Furthermore, these position-coded imaging devices typically require dozens of position-sensitive detectors, resulting in complex detector and electronics systems, high costs, and high prices. To reduce the use of position-sensitive detectors and lower costs, Marleau and Brennan et al. developed the one-dimensional time-encoded imaging (TEI) system LIGHTHOUSE in 2011. This system transforms the planar encoder used in position-coded imaging systems into a cylindrical rotating encoder, converting position encoding into time encoding through encoder rotation. The aforementioned two types of radiation imaging equipment are relatively complex in structure and difficult to assemble. Under ionizing radiation fields, motor rotation control may be interfered with, and there is no specific physical indication after movement. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, a one-dimensional coding imaging device is provided, which can be achieved through manual rotation, automatic rotation, or mechanical rotation of the scale, and has a simple and compact structure.

[0005] To achieve the aforementioned objectives, the technical solution adopted by this invention is as follows: It includes a turntable support, an R-axis rotary slide, a one-dimensional encoder assembly, a detector, a detector support, a U-shaped connecting arm, an annular base, a hollow motor, and an encoder mounting base. A vertical mounting hole is provided in the center of the one-dimensional encoder assembly. The upper side of the vertical mounting hole is fixedly connected to the R-axis rotary slide. The top of the R-axis rotary slide is fixedly connected to the turntable support. The top of the turntable support is fixedly connected to the top of the U-shaped connecting arm. The annular base is fixedly connected to the bottom of the U-shaped connecting arm. The encoder mounting base is fixedly located below the vertical mounting hole and rotatably mounted on the annular base. The detector is fixedly connected to the annular base via the detector support. The outer side of the hollow motor is fixedly connected to the annular base, and the inner side of the hollow motor is fixedly connected to the one-dimensional encoder assembly.

[0006] Furthermore, the one-dimensional coding board assembly includes several coding blocks that form a ring shape, and a slide mounting base that mates with the R-axis rotary slide is provided on the vertical mounting hole of the one-dimensional coding board assembly.

[0007] Furthermore, the top of the turntable support is provided with a radial through groove that mates with the U-shaped connecting arm, and a central threaded hole is provided on the radial through groove. Several side threaded holes that connect with the R-axis rotary slide are provided on the side of the turntable support.

[0008] Furthermore, a sliding bearing is provided between the one-dimensional coding board assembly and the annular base.

[0009] Furthermore, the upper side of the encoder plate mounting base is provided with an upper limit ring that mates with the vertical mounting hole, and the lower side of the encoder plate mounting base is provided with a lower limit ring that mates with the annular base.

[0010] Furthermore, the detector bracket includes a U-shaped bracket, a vertical connecting arm, and a horizontal bracket. One end of the horizontal bracket is fixedly connected to the annular base, and the other end is fixedly connected to the bottom of the vertical connecting arm. The top of the vertical connecting arm is fixedly connected to the U-shaped bracket.

[0011] Furthermore, a wire harness hole is provided at the bottom of the ring-shaped base.

[0012] Furthermore, the annular base is provided with a connecting socket that mates with the U-shaped connecting arm, and the connecting socket is provided with several horizontal screw holes.

[0013] Furthermore, the top of the U-shaped connecting arm is provided with an upper through hole that mates with the middle screw hole, and the bottom of the U-shaped connecting arm is provided with a lower through hole that mates with the horizontal screw hole.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention features two reading devices: an R-axis rotary slide (mechanical reading device) and a hollow motor encoder (electronic reading device). The R-axis rotary slide is located at the top of the device, facilitating physical data reading. Since the one-dimensional encoder assembly is a closed annular structure, the use of a hollow motor ensures that the detector and the one-dimensional encoder assembly are aligned on the same axis, and the detector remains relatively stationary while the one-dimensional encoder rotates. This structure allows for easy external connection of detector wiring without interference, ensuring stable detector signals. This structure simplifies the one-dimensional encoding imaging system, making rotation relatively simple, and allowing for both manual and automatic rotation. In complex radiation field environments, rotation can be determined through physical observation. The overall structure is simple and compact, with low assembly difficulty.

[0016] The upper side of the R-axis rotating slide of this invention is connected to the annular base via a U-shaped connecting arm. The annular base is connected to the outer side of the hollow motor. The inner side of the hollow motor is connected to the one-dimensional encoder plate assembly via bolts. The encoder plate assembly is connected to the lower side of the R-axis rotating slide to ensure the consistency between the motor rotation and the rotating slide. The R-axis rotating slide has a scale. After the hollow motor rotates, the accuracy of execution in complex electromagnetic environments can be ensured by observing the scale on the R-axis rotating slide. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0019] Figure 3 This is a partial structural diagram of the present invention with the one-dimensional encoder board assembly removed. Figure 1 ;

[0020] Figure 4 This is a partial structural diagram of the present invention with the one-dimensional encoder board assembly removed. Figure 2 ;

[0021] Figure 5 This is a schematic diagram of the ring-shaped base.

[0022] Figure 6 This is a structural diagram of the encoder board mounting base;

[0023] Figure 7 Vertical cross-sectional view of the encoder board mounting base;

[0024] Figure 8 Schematic diagram of a one-dimensional encoder assembly Figure 1 ;

[0025] Figure 9 Schematic diagram of a one-dimensional encoder assembly Figure 2;

[0026] Figure 10 Schematic diagram of the R-axis rotary slide Figure 1 ;

[0027] Figure 11 Schematic diagram of the R-axis rotary slide Figure 2 ;

[0028] The symbols for each component are as follows:

[0029] 1. Turntable bracket; 11. Central screw hole; 12. Radial through groove; 13. Side screw hole; 2. R-axis rotary slide; 3. One-dimensional encoder board assembly; 31. Encoder block; 32. Slide mounting base; 4. Detector; 5. Detector bracket; 51. U-shaped bracket; 52. Vertical connecting arm; 53. Horizontal bracket; 6. U-shaped connecting arm; 7. Sliding bearing; 8. Annular base; 81. Wiring harness hole; 82. Connecting socket; 83. Horizontal screw hole; 9. Encoder board mounting base. Detailed Implementation

[0030] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0031] like Figure 1 and 2 As shown, the one-dimensional coding imaging device includes a turntable support 1, an R-axis rotating slide 2, a one-dimensional coding plate assembly 3, a detector 4, a detector support 5, a U-shaped connecting arm 6, an annular base 8, a hollow motor, and a coding plate mounting base 9.

[0032] like Figure 3 and 4As shown, the top of the turntable bracket 1 is fixedly connected to the top of the U-shaped connecting arm 6, and the annular base 8 is fixedly connected to the bottom of the U-shaped connecting arm 6. A vertical mounting hole is provided in the middle of the one-dimensional encoder plate assembly 3. The upper side of the vertical mounting hole is fixedly connected to the R-axis rotary slide 2, and the top of the R-axis rotary slide 2 is fixedly connected to the turntable bracket 1. The encoder plate mounting seat 9 is fixed to the lower side of the vertical mounting hole and is rotatably mounted on the annular base 8. A sliding bearing 7 is provided between the one-dimensional encoder plate assembly 3 and the annular base 8. The sliding bearing 7 can reduce the friction between the one-dimensional encoder plate assembly 3 and the annular base 8, making the rotation of the one-dimensional encoder plate assembly 3 smoother. The detector 4 is preferably a CLYC detector. The detector 4 is fixedly connected to the annular base 8 through the detector bracket 5. The hollow motor is preferably a hollow gimbal motor DM-G6220. The outer side of the hollow motor is fixedly connected to the annular base 8, and the inner side of the hollow motor is fixedly connected to the one-dimensional encoder plate assembly 3. The top of the turntable support 1 is provided with a radial through groove 12 that mates with the U-shaped connecting arm 6. A central screw hole 11 is provided on the radial through groove 12. The top of the U-shaped connecting arm 6 is provided with an upper through hole that mates with the central screw hole 11. Several side screw holes 123 that connect to the R-axis rotary slide 2 are provided on the side of the turntable support 1. The top of the U-shaped connecting arm 6 is first installed in the radial through groove 12. Then, the turntable support 1 and the U-shaped connecting arm 6 are fixedly connected by bolts or screws passing through the upper through hole and the central screw hole 11. Finally, the turntable support 1 is connected to the R-axis rotary slide 2 by bolts or screws passing through the side screw holes 123.

[0033] like Figure 5 As shown, the detector bracket 5 includes a U-shaped bracket 51, a vertical connecting arm 52 and a horizontal bracket 53. One end of the horizontal bracket 53 is fixedly connected to the annular base 8, and the other end is fixedly connected to the bottom of the vertical connecting arm 52. The top of the vertical connecting arm 52 passes through the through hole of the hollow motor and is fixedly connected to the U-shaped bracket 51.

[0034] The annular base 8 is provided with a connection socket 82 that mates with the U-shaped connecting arm 6. The connection socket 82 has several horizontal screw holes 83, and the bottom of the U-shaped connecting arm 6 has a lower through hole that mates with the horizontal screw holes 83. The bottom of the U-shaped connecting arm 6 is first inserted into the connection socket 82, and then fixed in place by several screws or bolts passing through the horizontal screw holes 83 and the lower through hole. The bottom of the annular base 8 is provided with a wiring harness hole 81, which provides an installation opening for the power cord and data cable of the device without affecting the normal operation of the device. The annular base 8 is connected to the detector bracket 5. During the rotation of the one-dimensional encoder assembly 3, the detector remains stationary, and the detector wiring harness can be led out through the wiring harness hole.

[0035] like Figure 6 and 7As shown, the upper side of the encoder plate mounting base 9 is provided with an upper limit ring that mates with the vertical mounting hole. The encoder plate mounting base 9 is fixedly connected to the one-dimensional encoder plate assembly 3 through the upper limit ring. The lower side of the encoder plate mounting base 9 is provided with a lower limit ring that mates with the annular base 8. The encoder plate mounting base 9 is mates with the inner ring of the sliding bearing 7 through the lower limit ring.

[0036] like Figure 8 and 9 As shown, the one-dimensional encoder assembly 3 includes several encoder blocks 31, which form a ring shape. A slide mount 32, which mates with the R-axis rotary slide 2, is provided on the vertical mounting hole of the one-dimensional encoder assembly 3. In this embodiment, the one-dimensional encoder assembly 3 is preferably divided into four encoder blocks 31. The encoder blocks 31 are manufactured using 3D printing and then connected into a whole by bolts.

[0037] like Figure 10 and 11 As shown, the R-axis rotary slide 2 is preferably a manual rotary table R-axis platform, such as model RS60-L.

[0038] Working Process and Principle: This invention can be simplified in principle to consist of two bearings (R-axis rotary slide 2 and a hollow motor), with a one-dimensional encoder assembly 3 nested in between. Sliding bearings 7 are nested on the upper and lower sides of the one-dimensional encoder assembly 3. Connecting arms 6 fix the outer rings of the sliding bearings, ensuring that the rotation angle of the hollow motor matches the rotation angle of the R-axis rotary slide 2. A radiation source is placed to the side, emitting rays that pass through the one-dimensional encoder assembly 3. The hollow motor drives the one-dimensional encoder assembly 3 to rotate, either in a stepping or constant-speed manner. Stepping involves rotating a certain angle at intervals and then stopping for a period; constant-speed rotation is a fixed-speed rotation. The one-dimensional encoder assembly 3 drives the R-axis rotary slide 2, which can be verified by mechanical readings. The ray passes through the one-dimensional encoding plate assembly 3, which consists of blank areas and solid areas. The blank areas allow the ray to pass through and reach the detector. When the detector receives the ray, it outputs a signal. The solid areas block the ray, so the detector does not receive a signal and there is no output. By coupling with time, a series of signal and time data is obtained. The entire process of the one-dimensional encoding plate assembly 3 is encoding. After obtaining the encoded data, a decoding algorithm is used to decode it, and finally the azimuth angle of the radiation source is found.

[0039] This invention features both automatic and manual modes. In automatic mode, the hollow motor rotates, driving the one-dimensional encoder assembly 3 to rotate, which in turn rotates the lower end of the R-axis rotary slide 2. The R-axis rotary slide 2 has graduations, allowing for precise readings. In manual mode, the hollow motor only outputs encoder data to the host computer. When the hollow motor is deactivated, the one-dimensional encoder assembly 3 rotates, causing relative rotation between the upper and lower ends of the R-axis rotary slide 2. The rotation angle is determined by the readings from the R-axis rotary slide 2 and the hollow motor.

Claims

1. A one-dimensional coded imaging device, characterized in that, Includes a turntable bracket (1), an R-axis rotary slide (2), a one-dimensional encoder board assembly (3), a detector (4), a detector bracket (5), a U-shaped connecting arm (6), an annular base (8), a hollow motor and encoder board mounting base (9); The one-dimensional coding board assembly (3) has a vertical mounting hole in the middle. The upper side of the vertical mounting hole is fixedly connected to the R-axis rotary slide (2). The top of the R-axis rotary slide (2) is fixedly connected to the turntable bracket (1). The top of the turntable bracket (1) is fixedly connected to the top of the U-shaped connecting arm (6). The annular base (8) is fixedly connected to the bottom of the U-shaped connecting arm (6). The coding plate mounting base (9) is fixed on the lower side of the vertical mounting hole, and the coding plate mounting base (9) is rotatably mounted on the annular base (8); The detector (4) is fixedly connected to the annular base (8) via the detector bracket (5), the outer side of the hollow motor is fixedly connected to the annular base (8), and the inner side of the hollow motor is fixedly connected to the one-dimensional coding plate assembly (3).

2. The one-dimensional coded imaging device according to claim 1, characterized in that, The one-dimensional coding board assembly (3) includes a plurality of coding blocks (31), which form a ring shape. The vertical mounting hole of the one-dimensional coding board assembly (3) is provided with a slide mounting seat (32) that cooperates with the R-axis rotating slide (2).

3. The one-dimensional coded imaging device according to claim 1, characterized in that, The top of the turntable support (1) is provided with a radial through groove (12) that cooperates with the U-shaped connecting arm (6). The radial through groove (12) is provided with a central screw hole (11). The side of the turntable support (1) is provided with several side screw holes (123) that connect with the R-axis rotating slide (2).

4. The one-dimensional coded imaging device according to claim 1, characterized in that, A sliding bearing (7) is provided between the one-dimensional encoder assembly (3) and the annular base (8).

5. The one-dimensional coded imaging device according to claim 1, characterized in that, The upper side of the encoder plate mounting base (9) is provided with an upper limit ring that mates with the vertical mounting hole, and the lower side of the encoder plate mounting base (9) is provided with a lower limit ring that mates with the annular base (8).

6. The one-dimensional coded imaging device according to claim 1, characterized in that, The detector bracket (5) includes a U-shaped bracket (51), a vertical connecting arm (52) and a horizontal bracket (53). One end of the horizontal bracket (53) is fixedly connected to the annular base (8), and the other end is fixedly connected to the bottom of the vertical connecting arm (52). The top of the vertical connecting arm (52) is fixedly connected to the U-shaped bracket (51).

7. The one-dimensional coded imaging device according to claim 1, characterized in that, The bottom of the annular base (8) is provided with a wire harness hole (81).

8. The one-dimensional coded imaging device according to claim 1, characterized in that, The annular base (8) is provided with a connection socket (82) that mates with the U-shaped connecting arm (6), and the connection socket (82) is provided with several horizontal screw holes (83).

9. The one-dimensional coded imaging device according to claim 1, characterized in that, The top of the U-shaped connecting arm (6) is provided with an upper through hole that mates with the middle screw hole (11), and the bottom of the U-shaped connecting arm (6) is provided with a lower through hole that mates with the horizontal screw hole (83).

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