Conveying device and detection system

Abstract

This invention provides a conveying device and detection system to solve the problem that existing conveying equipment cannot accurately position conveyed objects. [Solution] The transport mechanism 1 comprises a drive roller 12 and a driven roller 13 rotatably mounted on a mounting frame, and a transport belt 14 for transporting a subject 7, which is sleeve-mounted to the drive roller and the driven roller; a drive mechanism 2 connected to the drive roller and used to rotate the drive roller; a sensor unit that senses first position information and second position information of the subject on the transport belt; and a control unit 9. The control unit controls the drive mechanism to enter a first state or a second state based on the first or second position information. In the first state, the transport belt transports the subject, and in the second state, the transport belt is stationary.

Description

Technical Field

[0001] The present invention relates to the fields of conveying equipment and detection technology, and particularly to a conveying device and a detection system.

Background Art

[0002] The detection system irradiates a workpiece with a radiation beam and determines whether there are defects in the workpiece based on the scanned image. The detection system is widely used in the field of quality inspection.

[0003] In the prior art, the detection system usually includes a conveying facility and a detection facility. The conveying facility transports the subject to the detection station, and the detection facility detects the subject at the detection station. While the subject is moving along with the conveyor belt, the position of the subject cannot be accurately controlled. When the subject moves to the detection station, the subject may appear in front of or behind the detection area of the detection facility. If the subject deviates from the detection area, it will affect the detection accuracy.

Summary of the Invention

[0004] Based on this, in an embodiment of the present invention, a conveying device and a detection system are provided to solve the problem that an existing conveying facility cannot accurately position a conveyed object.

[0005] In a first aspect, an embodiment of the present invention provides a conveying device, which includes a conveying mechanism including a mounting frame, a driving roller, a driven roller, and a conveyor belt, wherein the driving roller and the driven roller are rotatably mounted on the mounting frame, the conveyor belt is sleeved on the driving roller and the driven roller, and the conveyor belt is used to convey a subject; a driving mechanism connected to the driving roller for driving the driving roller to rotate; a sensor unit for sensing first position information and second position information of the subject on the conveyor belt; It includes a control unit, Both the sensor unit and the drive mechanism are connected to the control unit via communication, and the control unit controls the drive mechanism to enter a first state or a second state based on the first position information or the second position information. In the first state, the conveyor belt conveys the subject, and in the second state, the conveyor belt is stationary.

[0006] According to an embodiment of the present invention, the sensor unit comprises a first sensor and a second sensor, The first sensor is positioned at a first position in the transport direction of the transport mechanism, the first sensor can transmit a first sensing signal to the control unit, and the control unit controls the drive mechanism to reach the first state based on the first sensing signal. The second sensor is positioned at a second position in the transport direction of the transport mechanism, and the second sensor can transmit a second sensing signal to the control unit, which controls the drive mechanism to reach the second state based on the second sensing signal.

[0007] According to an embodiment of the present invention, the invention further comprises a feedback unit that communicates with the control unit, The feedback unit is configured to detect the second position information of the subject on the conveyor belt, The control unit controls the drive mechanism to reach the second state based on the second position information detected by the feedback unit.

[0008] In accordance with an embodiment of the present invention, the feedback unit includes a first encoder, the first encoder is positioned on the driven roller, the first encoder detects a first real-time angle in which the driven roller rotates, and the second position information is acquired based on the first real-time angle.

[0009] In an embodiment of the present invention, the feedback unit further comprises a second encoder, the second encoder being positioned on the drive roller, and the second encoder detecting a second real-time angle of rotation of the drive roller.

[0010] According to an embodiment of the present invention, the control unit receives a detection signal and controls the drive mechanism to bring it to the first state based on the detection signal, thereby transporting the object to be transported from the detection position to the loading / unloading position.

[0011] According to an embodiment of the present invention, the drive roller comprises a first rotating shaft, a drive wheel, and a first synchronous pulley, wherein the drive wheel is sleeve-mounted on the first rotating shaft, two of the first synchronous pulleys are sleeve-mounted on the first rotating shaft, and the two of the first synchronous pulleys are arranged on two opposing sides of the drive wheel. The driven roller comprises a second rotating shaft, a driven wheel, and a second synchronous pulley, wherein the driven wheel is sleeve-mounted on the second rotating shaft, the two second synchronous pulleys are sleeve-mounted on the second rotating shaft, and the two second synchronous pulleys are arranged on two opposing sides of the driven wheel. The conveyor belt comprises a flat belt and synchronous belts connected to both sides of the flat belt, the flat belt being sleeve-mounted on the driving wheel and the driven wheel, and the synchronous belt being sleeve-mounted on the first synchronous pulley and the second synchronous pulley.

[0012] Depending on the embodiment of the present invention, a support member may be further provided. The support member is positioned on the upper part of the mounting frame, and the support member supports the flat belt.

[0013] Depending on the embodiment of the present invention, a tensioner mechanism may be further provided. The tensioner mechanism is located at the bottom of the mounting frame and comprises a tensioner roller, which is suitable for moving vertically to adjust the tension of the conveyor belt.

[0014] In a second aspect, an embodiment of the present invention provides a detection system, the detection system comprising: the above-mentioned conveying device; and a detection device arranged in the conveying direction of the conveying device, wherein the conveying device conveys a subject from a first position to a second position, and the detection device detects the subject.

[0015] The conveying device and the detection system provided by the embodiment of the present invention can at least achieve the technical effect that the sensor unit senses the position information of the subject on the conveying belt, and the control unit controls the driving mechanism to be in a first state or a second state according to the sensing signal of the sensor unit, so that the subject is accurately moved from the loading position to the detection position, and the position accuracy of the subject at the detection position is ensured.

[0016] The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings.

Brief Description of the Drawings

[0017] [Figure 1] FIG. 1 schematically shows a perspective view of a conveying device according to an embodiment of the present invention. [Figure 2] FIG. 2 schematically shows a front view of a conveying device according to an embodiment of the present invention. [Figure 3] FIG. 3 schematically shows a schematic diagram of a partial structure of a conveying device according to an embodiment of the present invention. [Figure 4] FIG. 4 schematically shows a side view of a conveying device according to an embodiment of the present invention. [Figure 5] FIG. 5 is a partially enlarged schematic view of part A in FIG. 4. [Figure 6] FIG. 6 schematically shows an assembly schematic diagram of a driving roller, a first mounting seat, and a driving mechanism according to an embodiment of the present invention. [Figure 7] FIG. 7 schematically shows an assembly schematic diagram of a driven roller and a second mounting seat according to an embodiment of the present invention. [Figure 8]FIG. 8 schematically shows a schematic diagram of a partial structure of a conveyor belt according to an embodiment of the present invention. [Figure 9] FIG. 9 schematically shows a schematic diagram of the structure of a detection system according to an embodiment of the present invention.

Mode for Carrying Out the Invention

[0018] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in more detail below in conjunction with specific embodiments and with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of the present invention, but only some of the embodiments. Based on the embodiments of the present invention, all other embodiments that can be obtained by a person of ordinary skill in the art without creative work also fall within the protection scope of the present invention.

[0019] The terms used herein are for the purpose of describing specific embodiments and are not intended to limit the present invention. The terms such as "comprising" and "including" used herein indicate the presence of the described features, steps, operations and / or components, and do not exclude the presence or addition of one or more other features, steps, operations or components.

[0020] In the description of the present invention, the terms "attach", "contact" and "connect" should be understood in a broad sense unless specifically stated and limited, for example, they may be fixed connections, detachable connections or integral connections. They may be mechanical connections or electrical connections. They may be in direct contact or in indirect contact through an intermediate medium, or the connection between two elements may be conductive. A person skilled in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0021] In conventional technology, a detection system typically includes a transport system and a detection system. The transport system carries the sample to a detection station, and the detection system detects the sample at the detection station. While the sample moves to the detection station along the transport belt, the sample's position is usually controlled by setting the rotation time of the transport belt, making precise control of the sample's position impossible. When the sample moves to the detection station, it may appear in front of or behind the detection area of ​​the detection system, and if the sample moves out of the detection area, it affects the detection accuracy.

[0022] Embodiments of the present invention provide a transport device and a detection system that can accurately control the position of a subject and ensure detection accuracy.

[0023] A transport device according to an embodiment of the present invention will be described with reference to Figures 1 to 8.

[0024] As shown in Figures 1, 2, 3, and 4, the conveying device according to an embodiment of the present invention comprises a conveying mechanism 1, a drive mechanism 2, a sensor unit, and a control unit 9. The conveying mechanism 1 comprises a mounting frame 11, a driving roller 12, a driven roller 13, and a conveying belt 14. The driving roller 12 and the driven roller 13 are rotatably mounted on the mounting frame 11. The conveying belt 14 is sleeve-mounted on the driving roller 12 and the driven roller 13. The conveying belt 14 conveys the subject 7. The drive mechanism 2 is connected to the driving roller 12 and drives the driving roller 12 to rotate. The sensor unit senses first position information and second position information of the subject 7 on the conveying belt 14. Both the sensor unit and the drive mechanism 2 are communicated to the control unit 9, and the control unit 9 sets the drive mechanism 2 to a first state or a second state based on the first position information or the second position information. In the first state, the transport belt 14 transports the subject 7, and in the second state, the transport belt 14 is stationary.

[0025] Specifically, the mounting frame 11 is used to mount components such as the driving roller 12 and the driven roller 13. The mounting frame 11 comprises a leg portion 111 and a support beam 112. One end of the leg portion 111 is connected to the support beam 112, and the leg portion 111 is placed on the ground or a workbench. The support beam 112 may be a frame structure formed by stitching together two longitudinal beams and multiple transverse beams. The support beam 112 has a length direction and a width direction. The length direction is shown in direction D1 in Figures 1 and 2, and the width direction is shown in direction D2 in Figure 1. The support beam 112 has first and second ends facing each other along the length direction, and first and second sides facing each other along the width direction.

[0026] The driving roller 12 is rotatably mounted on the first end of the support beam 112, the driven roller 13 is rotatably mounted on the second end of the support beam 112, and the conveyor belt 14 is sleeve-mounted to the driving roller 12 and the driven roller 13.

[0027] The drive mechanism 2 is connected to the main drive roller 12 and drives the main drive roller 12 to rotate. The drive mechanism 2 may be a motor. The motor may be a unidirectional motor, a bidirectional motor, or a three-phase motor. The drive shaft of the motor is power-coupled to the rotation shaft of the main drive roller 12.

[0028] The sensor unit is positioned in the transport direction of the transport mechanism 1, and a loading station and a detection station are provided in the transport direction of the transport mechanism 1. The loading position corresponds to the loading station, and the detection position corresponds to the detection station. The detection device is located at the detection station, and the distance between the loading position and the detection position is defined as a preset distance.

[0029] The sensor unit is equipped with sensors, at least one of which is attached to the loading station to detect whether the subject 7 is placed on the conveyor belt 14 and is located in the loading position. At least one sensor is attached to the detection station to detect whether the subject 7 has moved to the detection position along with the conveyor belt 14. Examples of sensors that can be used include photoelectric sensors, infrared sensors, ultrasonic sensors, and laser radar. The following explanation will use a photoelectric sensor as an example.

[0030] A photoelectric sensor attached to the loading station is defined as the first sensor 31. If the size of the object 7 is short, one group of first sensors is attached to the loading station. The first sensor group includes two first sensors 31. The two first sensors 31 are arranged symmetrically with respect to the central plane of the support beam 112. The two first sensors 31 are attached to the first and second sides of the support beam 112, respectively. One first sensor 31 is used as a transmitter, and the other first sensor 31 is used as a receiver. If the size of the object 7 is long, two groups of first sensors are attached to the loading station. The distance between the two groups of first sensors matches the length of the object 7. The two groups of first sensors are used to detect whether the object 7 is in the loading position. It is understood that two or more groups of first sensors 31 can be installed on the loading station depending on the length of the object 7.

[0031] A photoelectric sensor attached to the detection station is defined as a second sensor 32. Depending on the length of the object 7, one, two, or more second sensor groups can be attached to the detection station, each second sensor group comprising two second sensors 32, the two second sensors 32 distributed symmetrically around the central plane of the support beam 112, the two second sensors 32 attached to the first and second sides of the support beam 112 respectively, one second sensor 32 used as a transmitter and the other second sensor 32 used as a receiver.

[0032] Both the drive mechanism 2 and the sensor unit are connected to the control unit 9 via communication.

[0033] The subject 7 is placed on the conveyor belt 14 by the transfer device. The subject 7 is placed on the conveyor belt 14 and positioned in the loading position. The subject 7 is within the sensing area of ​​the first sensor group, and the first sensor 31 transmits a first sensing signal to the control unit 9. The control unit 9 receives the first sensing signal and controls the state of the drive mechanism 2. The subject 7 moves to the detection position along with the conveyor belt 14, and the subject 7 is within the sensing area of ​​the second sensor group. The second sensor 32 transmits a second sensing signal to the control unit 9. The control unit 9 receives the second sensing signal and controls the state of the drive mechanism 2.

[0034] The operation process of the conveying device is described in detail below.

[0035] Before the subject 7 is placed on the conveyor belt 14, the motor is in the off state and the conveyor belt 14 is stationary. When the subject 7 is placed on the conveyor belt 14 and is within the sensing area of ​​the first sensor 31, the first sensor 31 transmits a first sensing signal to the control unit 9, which receives the first sensing signal and controls the motor to start. At this time, the motor is in the first state, which is the operating state.

[0036] After the motor starts, it drives the main roller 12 to rotate, which in turn rotates the conveyor belt 14, and the subject 7 moves along with the conveyor belt 14 from the loading position to the detection position. After the subject 7 moves to the detection position, it is located within the sensing area of ​​the second sensor 32, and the second sensor 32 transmits a second sensing signal to the control unit 9. The control unit 9 receives the second sensing signal and controls the motor to stop. At this time, the motor is in the second state, which is a non-operating state.

[0037] After the motor stops, the drive roller 12 stops rotating, the conveyor belt 14 is stationary, the subject 7 is in the detection position, the subject 7 is located within the detection area of ​​the detection device, and the detection device detects the subject 7.

[0038] The loading position of the subject 7 is sensed by the first sensor 31, and the detection position of the subject 7 is sensed by the second sensor 32. The control unit 9 receives the sensing signals from the sensor units and controls the drive mechanism 2 to move from the loading position to the detection position accurately by moving it to either the first or second state.

[0039] Selectively, after the detection of the subject 7 is complete, the control unit 9 receives a detection signal, i.e., a detection completion signal, transmitted from the detection device. Based on the detection completion signal, the control unit 9 controls the motor to start, and the subject 7 moves toward the loading / unloading station by the conveyor belt 14. Once the subject 7 has reached the loading / unloading station, the motor is stopped, and the subject 7 is transported to the next process.

[0040] Selectively, after the detection of the subject 7 is complete, the control unit 9 can receive a detection completion signal transmitted from the detection device and directly retrieve the subject 7 detected at the detection location.

[0041] In the embodiment of the present invention, the sensor unit senses the position information of the subject 7 on the conveyor belt 14, and the control unit 9 controls the drive mechanism 2 to a first state or a second state based on the sensing signal from the sensor unit, thereby ensuring that the subject 7 moves accurately from the loading position to the detection position and ensuring the positional accuracy of the subject 7 at the detection position.

[0042] In a selective embodiment, the transport device also includes a feedback unit communicated to the control unit 9, the feedback unit being configured to detect a second position information of the subject 7 on the transport belt 14, and the control unit 9 controlling the drive mechanism 2 to a second state based on the second position information detected by the feedback unit.

[0043] Specifically, if the detection device has a detection channel, the subject 7 needs to be detected by the detection channel. If it is difficult to mount the sensor at the detection position, the feedback unit can detect the second position information of the subject 7 on the conveyor belt 14. Alternatively, the subject 7 is detected by emitting a radiation beam from the radiation source of the detection device. If the sensor is a photoelectric sensor, and the beam emitted from the photoelectric sensor affects the detection, the feedback unit can detect the second position information of the subject 7 on the conveyor belt 14.

[0044] The feedback unit includes an encoder mounted on the driving roller 12 or the driven roller 13. The encoder measures the angle of rotation of either the driving roller 12 or the driven roller 13. Based on the angle of rotation of the driving roller 12 or the driven roller 13, the displacement of the conveyor belt 14 is calculated, and the position of the subject 7 is precisely controlled according to the displacement of the conveyor belt 14.

[0045] For example, the encoder is attached to the driven roller 13, and the distance between the loading position and the detection position is a preset distance. If the rotational angular velocity and radius of the driven roller 13 are known, the first target angle at which the driven roller 13 must rotate when the conveyor belt 14 moves from the loading position to the detection position is calculated from the preset distance.

[0046] After the motor starts, the encoder begins detecting the angle of rotation of the driven roller 13. If the first real-time angle detected by the encoder is equal to the first target angle, it indicates that the subject 7 has moved from the loading position to the detection position along with the conveyor belt 14. The control unit 9 receives the first angle signal from the encoder, confirms that the subject 7 has reached the detection position, controls the motor to stop, and the detection device begins detecting the subject 7.

[0047] For example, the encoder is attached to the main roller 12, and the distance between the loading position and the detection position is a preset distance. If the rotational angular velocity and radius of the main roller 12 are known, the preset distance is used to calculate a second target angle at which the main roller 12 must rotate as the conveyor belt 14 moves from the loading position to the detection position.

[0048] After the motor starts, the encoder begins detecting the angle of rotation of the main drive roller 12. When the second real-time angle detected by the encoder is equal to the second target angle, it indicates that the subject 7 has moved from the loading position to the detection position along with the conveyor belt 14. The control unit 9 receives the second angle signal from the encoder, confirms that the subject 7 has reached the detection position, controls the motor to stop, and the detection device begins detecting the subject 7.

[0049] After the motor starts, the encoder detects the angle of rotation of the driven roller 13 or the driving roller 12, and detects the displacement of the conveyor belt 14. This allows for precise control of the displacement of the conveyor belt 14 and accurate feedback of the position of the subject 7.

[0050] As shown in Figure 7, in a preferred embodiment, the feedback unit includes a first encoder 41 positioned on the driven roller 13, the first encoder 41 detects a first real-time angle of rotation of the driven roller 13, and obtains second position information based on the first real-time angle.

[0051] Specifically, the feedback unit includes a first encoder 41 attached to the driven roller 13, and the first encoder 41 detects in real time a first real-time angle of rotation of the driven roller 13.

[0052] The first target angle at which the driven roller 13 must rotate when the conveyor belt 14 moves from the loading position to the detection position is calculated based on a preset distance, the angular velocity of the driven roller 13's rotation, and the radius of the driven roller 13.

[0053] The first sensor 31 detects that the subject 7 is in the loading position, and the first sensor 31 transmits a first sensing signal to the control unit 9. The control unit 9 receives the first sensing signal and controls the motor to start. After the motor starts, the first encoder 41 detects the angle of rotation of the driven roller 13 in real time. The first real-time angle detected by the first encoder 41 is equal to the first target angle, indicating that at this point the subject 7 is moving to the detection position along with the conveyor belt 14. The first encoder 41 transmits a first angle signal to the control unit 9. The control unit 9 receives the first angle signal and controls the motor to stop. Subsequently, the detection device begins detecting the subject 7.

[0054] The angle at which the driven roller 13 rotates allows for more accurate feedback of the distance the conveyor belt 14 has traveled, which is advantageous in more accurately reflecting the position of the subject 7.

[0055] As shown in Figure 6, in a selective embodiment, the feedback unit also includes a second encoder 42 located on the drive roller 12, which detects a second real-time angle of rotation of the drive roller 12.

[0056] Specifically, the feedback unit also includes a second encoder 42 attached to the main drive roller 12, and the second encoder 42 can also be attached to the motor. The second encoder 42 detects the second real-time angle of rotation of the main drive roller 12 in real time.

[0057] The second target angle at which the drive roller 12 must rotate when the conveyor belt 14 moves from the loading position to the detection position is calculated based on a preset distance, the angular velocity of the drive roller 12's rotation, and the radius of the drive roller 12.

[0058] By detecting the second real-time angle of rotation of the main drive roller 12, it is possible to determine whether the subject 7 has moved to the detection position. If the subject 7 is in the loading position, the control unit 9 controls the motor to start, and then the second encoder 42 detects the angle of rotation of the main drive roller 12 in real time. The second real-time angle detected by the second encoder 42 is equal to the second target angle, indicating that at this point the subject 7 has moved to the detection position along with the conveyor belt 14. The second encoder 42 transmits the second angle signal to the control unit 9, which receives the second angle signal and controls the motor to turn off. Subsequently, the detection device begins detecting the subject 7.

[0059] Furthermore, by comparing the first real-time angle with the second real-time angle, it is possible to determine whether the rotations of the driven roller 13 and the driven roller 12 are synchronized.

[0060] Selectively, the diameter of the driven roller 13 is equal to the diameter of the driving roller 12, and the second target angle is equal to the first target angle.

[0061] If, within a preset time, the first real-time angle detected by the first encoder 41 is equal to the second real-time angle detected by the second encoder 42, it indicates that the driven roller 13 and the driven roller 12 are rotating synchronously. The preset time is set according to the actual needs, such as 2 seconds, 4 seconds, or 6 seconds.

[0062] If, within a preset time, the first real-time angle detected by the first encoder 41 is smaller than the second real-time angle detected by the second encoder 42, it indicates that the driven roller 13 and the driven roller 12 are not rotating in sync. In this case, the motor must be turned off and components such as the conveyor belt 14, driven roller 12, and driven roller 13 must be repaired.

[0063] Selectively, the diameter of the driven roller 13 is smaller than the diameter of the driven roller 12, and the second target angle is smaller than the first target angle. The ratio of the first real-time angle to the second real-time angle must be equal to the ratio of the diameter of the driven roller 12 to the diameter of the driven roller 13.

[0064] If, within a predetermined time, the ratio of the first real-time angle to the second real-time angle is equal to the ratio of the diameter of the driving roller 12 to the diameter of the driven roller 13, it indicates that the driven roller 13 and the driving roller 12 are rotating synchronously.

[0065] If, within a preset time, the ratio of the first real-time angle to the second real-time angle is smaller than the ratio of the diameter of the driven roller 12 to the diameter of the driven roller 13, it indicates that the driven roller 13 and the driven roller 12 are not rotating in sync. In this case, the motor must be turned off and components such as the conveyor belt 14, driven roller 12, and driven roller 13 must be repaired.

[0066] This allows for accurate detection of the position of the subject 7 using the first real-time angle detected by the first encoder 41 and the second real-time angle detected by the second encoder 42. Furthermore, based on the comparison result of the first real-time angle and the second real-time angle, feedback can be provided on whether the rotation of the driven roller 13 and the active roller 12 maintains synchronization, ensuring that the first real-time angle accurately reflects the position of the subject 7.

[0067] As shown in Figures 6, 7, and 8, in a preferred embodiment, the drive roller 12 comprises a first rotating shaft, a drive wheel 121, and a first synchronous pulley 122, wherein the drive wheel 121 is sleeve-mounted on the first rotating shaft, the two first synchronous pulleys 122 are sleeve-mounted on the first rotating shaft, and the two first synchronous pulleys 122 are located on two opposing sides of the drive wheel 121. The driven roller 13 comprises a second rotating shaft, a driven wheel 131, and a second synchronous pulley 132. The driven wheel 131 is sleeve-mounted on the second rotating shaft. The two second synchronous pulleys 132 are sleeve-mounted on the second rotating shaft, and the two second synchronous pulleys 132 are located on two opposing sides of the driven wheel 131. The conveyor belt 14 comprises a flat belt 141 and synchronous belts 142 connected to both sides of the flat belt 141. The flat belt 141 is sleeve-mounted on the drive wheel 121 and the driven wheel 131. The synchronous belt 142 is sleeve-mounted on the first synchronous pulley 122 and the second synchronous pulley 132.

[0068] Specifically, the drive roller 12 comprises a first rotating shaft, a drive wheel 121, and a first synchronous pulley 122. The drive wheel 121 is sleeve-mounted on the first rotating shaft, and the two first synchronous pulleys 122 are sleeve-mounted on the first rotating shaft, and the two first synchronous pulleys 122 are located on two opposing sides of the drive wheel 121, and the drive wheel 121 is a light wheel. The diameter of the drive wheel 121 is equal to the diameter of the first synchronous pulleys 122.

[0069] The mounting frame 11 further comprises two first mounting seats 113, and both ends of the first rotation shaft are rotatably connected to the two first mounting seats 113. The two first mounting seats 113 can be screwed onto the first end of the support beam 112, and the two first mounting seats 113 are located on the first and second sides of the support beam 112, respectively, and the first rotation shaft is rotatably connected to the two first mounting seats 113. As a result, the drive roller 12 is rotatably mounted on the first end of the support beam 112.

[0070] The driven roller 13 comprises a second rotating shaft, a driven wheel 131, and a second synchronous pulley 132. The driven wheel 131 is sleeve-mounted on the second rotating shaft, and the two second synchronous pulleys 132 are sleeve-mounted on the second rotating shaft. The two second synchronous pulleys 132 are located on two opposing sides of the driven wheel 131, and the driven wheel 131 is a light wheel. The diameter of the driven wheel 131 is equal to the diameter of the second synchronous pulleys 132.

[0071] The mounting frame 11 is equipped with two second mounting seats 114, and both ends of the second rotation shaft are rotatably connected to the two second mounting seats 114. The two second mounting seats 114 can be screwed into the second end of the support beam 112, and the two second mounting seats 114 are located on the first and second sides of the support beam 112, respectively, and the second rotation shaft is rotatably connected to the two second mounting seats 114. As a result, the driven roller 13 is rotatably mounted to the second end of the support beam 112.

[0072] The conveyor belt 14 is stitched together by a flat belt 141 and two synchronous belts 142. Specifically, the flat belt 141 has two opposing sides, with one side of the flat belt 141 connected to a synchronous belt 142 and the other side connected to another synchronous belt 142. The width of the flat belt 141 matches the length of the drive wheel 121 and the driven wheel 131, and the width of the synchronous belts 142 matches the length of the first synchronous belt pulley 122 and the second synchronous belt pulley 132.

[0073] The flat belt 141 is sleeve-mounted on the drive wheel 121 and the driven wheel 131, and the synchronous belt 142 is sleeve-mounted on the first synchronous pulley 122 and the second synchronous pulley 132. The width of the flat belt 141 is wider than the width of the synchronous belt 142, and it is understood that the subject 7 is placed on the flat belt 141.

[0074] When the conveyor belt 14 is a flat belt as a whole, the conveyor belt 14 is likely to slip during rotation, and since the movement of the conveyor belt 14 is not synchronized with the movement of the drive mechanism 2, it affects the accurate detection of the position of the specimen 7.

[0075] The flat belt 141 and the synchronous belt 142 are used in combination, and the synchronous belt 142 is engaged and connected to the first synchronous pulley 122 and the second synchronous pulley 132. The two synchronous belts 142 avoid slipping during the rotation of the conveyor belt 14, ensure the synchronization of the conveyor belt 14 with the driving roller 12 and the driven roller 13, and are further advantageous for accurately detecting the position of the specimen 7.

[0076] As shown in FIGS. 4 and 5, in a selective embodiment, the conveying device further includes a support member 5 disposed on the upper part of the mounting frame 11, and the support member 5 supports the flat belt 141.

[0077] Specifically, the conveying device further includes a support member 5, and the support member 5 supports the conveyor belt 14. The support member 5 includes a connecting portion and a support portion 53, and the connecting portion can be connected to the vertical beam of the support beam 112 by welding, screwing, or clamp fastening. The support member 5 can be formed by bending a plate material.

[0078] Optionally, the support member 5 is U-shaped, the connecting portion includes a vertical connecting portion, and the end of the vertical connecting portion is bent at 90 degrees and extended in the horizontal direction to form the support portion 53, and the vertical connecting portion can be connected to the inner surface of the vertical beam of the support beam 112.

[0079] Optionally, the support member 5 is "r-shaped", and the connecting portion includes a horizontal connecting portion 51 and a vertical connecting portion 52. The horizontal connecting portion 51 is bent at 90 degrees in the vertical direction and extended in the vertical direction to form the vertical connecting portion 52. The vertical connecting portion 52 is bent at 90 degrees in the horizontal direction and extended in the horizontal direction to form the support portion 53. The vertical connecting portion 52 is used to realize the transition from the horizontal connecting portion 51 to the support portion 53. The horizontal connecting portion 51 can be connected to the upper surface of the vertical beam of the support beam 112.

[0080] The width of the support portion 53 matches the width of the flat belt 141, and the support portion 53 is in contact with the inner surface of the flat belt 141, or the two are in close proximity. The subject 7 is placed on the conveyor belt 14, and the subject 7 is in contact with the outer surface of the flat belt 141. The support portion 53 plays an effective role in supporting the flat belt 141, effectively avoiding localized indentation of the flat belt 141 due to the gravity of the subject 7, maintaining the flatness of the conveying surface of the conveyor belt 14, and ensuring the stability of the conveyor belt 14 during the transport of the subject 7.

[0081] As shown in Figures 1, 2, and 3, in an optional embodiment, the conveying device also includes a tensioner mechanism 6. The tensioner mechanism 6 is located at the bottom of the mounting frame 11 and includes a tensioner roller 61, which is suitable for moving vertically to adjust the tension of the conveying belt 14.

[0082] Specifically, the tensioner mechanism 6 includes a tensioner roller 61, and the mounting frame 11 also includes a third mounting seat 115, of which there are two, and the two third mounting seats 115 are located on the first and second sides of the support beam 112, respectively. The tensioner roller 61 includes a first spindle and a first rotating cylinder rotatably connected to the first spindle, and both ends of the first spindle are each connected to the two third mounting seats 115. The inner surface of the conveyor belt 14 is in rolling contact with the first rotating cylinder.

[0083] The first spindle is mounted vertically movably on the third mounting seat 115. By moving the first spindle up and down vertically, the height of the tensioner roller 61 is adjusted, thereby adjusting the tension of the conveyor belt 14 so that the conveyor belt 14 maintains the appropriate tension.

[0084] Furthermore, the tensioner mechanism 6 also includes carrier rollers 62, two of which are located on opposite sides of the tensioner roller 61, and are positioned above the tensioner roller 61. The carrier roller 62 comprises a second spindle and a second rotating cylinder rotatably connected to the second spindle, with both ends of the second spindle each connected to two fourth mounting seats. The outer surface of the conveyor belt 14 is in rolling contact with the second rotating cylinder. The carrier rollers 62 are positioned on both sides of the tension roller 61 to prevent the conveyor belt 14 from slackening on both sides of the tension roller 61 and to ensure sufficient tension in the conveyor belt 14.

[0085] Furthermore, the first encoder 41 detects the first real-time angle of rotation of the driven roller 13, and the second encoder 42 detects the second real-time angle of rotation of the driving roller 12. If the diameters of the driving roller 12 and the driven roller 13 are the same, the object 7 moves from the loading position to the detection position, and the values ​​of the first real-time angle and the second real-time angle become equal.

[0086] If the first real-time angle is smaller than the second real-time angle, it indicates that the conveyor belt 14 is too loose, slipping, or otherwise insufficient. When the drive roller 12 rotates to the second target angle, the displacement of the conveyor belt 14 becomes smaller than the distance between the loading position and the detection position. At this point, the subject 7 has not moved to the detection position, and detecting the subject 7 affects the detection accuracy.

[0087] Based on the comparison result between the first real-time angle and the second real-time angle detected by the first encoder 41 and the second encoder 42, the tension of the conveyor belt 14 can be fed back. If the conveyor belt 14 is too loose, the tensioner mechanism 6 can be adjusted to bring the conveyor belt 14 to the appropriate tension, ensuring the accuracy of the detection.

[0088] As shown in Figure 9, an embodiment of the present invention also provides a detection system including a transport device and a detection device. The detection device is positioned in the transport direction of the transport device, the transport device transports the subject 7 from a first position to a second position, and the detection device detects the subject 7.

[0089] The structure of the conveying device is as described above, with the loading station and detection station arranged in the conveying direction of the conveying device. The detection device comprises a radiation source 81 and a detector 82, both located at the detection station. Selectively, the radiation source 81 and detector 82 are fixed relative to the detection station; for example, the radiation source 81 is installed on the first side of the conveying belt 14, and the detector 82 is attached to the second side of the conveying belt 14. Selectively, the radiation source 81 and detector 82 are rotatably mounted to the detection station.

[0090] The radiation source 81 emits a radiation beam to form a scanning area, and the detector 82 detects projection data formed after the radiation beam passes through the subject 7 as the subject 7 passes through the scanning area. The imaging unit generates a scanning image based on the projection data and detects whether the subject 7 has a defect.

[0091] At the loading station, two groups of first sensors are used to detect whether the subject 7 is in the loading position. At the detection station, a first encoder 41 is used to detect whether the subject 7 is in the detection position.

[0092] The subject 7 is placed on the conveyor belt 14 and positioned at the loading location. The subject 7 is located within the sensing areas of two groups of first sensors, and the first sensor 31 transmits a first sensing signal to the control unit 9. After receiving the first sensing signal, the control unit 9 controls the motor to start, and the subject 7 moves toward the detection position along the conveyor belt 14.

[0093] After the motor starts, the first encoder 41 detects the first real-time angle of rotation of the driven roller 13. The first real-time angle is equal to the first target angle, indicating that the subject 7 has moved to the detection position. The first encoder 41 transmits the first angle signal to the control unit 9, which controls the motor to stop. After the motor stops, the conveyor belt 14 becomes stationary, the subject 7 is at the detection position, and the detection device begins detecting the subject 7.

[0094] A radiation beam emitted from the radiation source 81 passes through the subject 7, and the detector 82 detects the projection data formed after the radiation beam has passed through the subject 7. The imaging unit generates a scanning image based on the projection data and detects the subject 7.

[0095] After the subject 7 is detected, the control unit 9 receives a detection completion signal transmitted from the detection device and controls the motor to start, causing the subject 7 to move toward the loading / unloading position along the conveyor belt 14. When the subject 7 has moved toward the loading / unloading position, the control unit 9 controls the motor to stop.

[0096] The first sensor 31 and the first encoder 41 accurately detect the loading position and detection position of the object to be tested 7, accurately move the object to the detection position, and detect the object to be tested 7 at the detection position, thereby ensuring detection accuracy.

[0097] The above are merely specific embodiments of the present invention, and the scope of protection of this application is not limited thereto. Any modifications or substitutions made without departing from the spirit and principles of the present invention shall be included in the scope of protection of this application. Accordingly, the scope of protection of this application shall be based on the scope of protection of the claims. [Explanation of Symbols]

[0098] 1. Conveying mechanism 11 Mounting frame 111 Legs 112 Support beam 113 First mounting seat 114 Second mounting seat 115 Third mounting seat 12 Main roller 121 Main drive wheel 122 First synchronized pulley 13 Driven roller 131 Driven Wheel 132 Second synchronized pulley 14. Conveyor belt 141 Flat belt 142 Synchronized belt 2. Drive mechanism 31 First Sensor 32. Second Sensor 41 First Encoder 42 Second encoder 5. Support Member 51 Horizontal connection section 52 Vertical connection section 53 Support part 6. Tensioner mechanism 61 Tensioner Roller 62 Carrier Roller 7 Subjects 81 Radiation source 82 detectors

Claims

1. A conveying mechanism comprising a mounting frame, a driving roller, a driven roller, and a conveying belt, wherein the driving roller and the driven roller are rotatably mounted on the mounting frame, the conveying belt is sleeve-mounted on the driving roller and the driven roller, and the conveying belt is used to convey a subject. A drive mechanism connected to the main roller and for driving the main roller to rotate, A sensor unit for sensing the first and second position information of the subject on the conveyor belt, It includes a control unit, Both the sensor unit and the drive mechanism are connected to the control unit via communication. The control unit controls the drive mechanism to enter the first state or the second state based on the first position information or the second position information. A conveying device characterized in that, in the first state, the conveying belt conveys the subject, and in the second state, the conveying belt is stationary.

2. The sensor unit comprises a first sensor and a second sensor, The first sensor is positioned at a first position in the transport direction of the transport mechanism, the first sensor is capable of transmitting a first sensing signal to the control unit, and the control unit controls the drive mechanism to reach the first state based on the first sensing signal. The second sensor is positioned at a second position in the transport direction of the transport mechanism, and the second sensor is capable of transmitting a second sensing signal to the control unit, and the control unit controls the drive mechanism to reach the second state based on the second sensing signal. The conveying device according to claim 1.

3. The system further comprises a feedback unit that communicates with the aforementioned control unit, The feedback unit is configured to detect the second position information of the subject on the conveyor belt, The control unit controls the drive mechanism to reach the second state based on the second position information detected by the feedback unit. The conveying device according to claim 1.

4. The feedback unit includes a first encoder, The first encoder is positioned on the driven roller, and the first encoder detects a first real-time angle in which the driven roller rotates and acquires second position information based on the first real-time angle. The conveying device according to claim 3.

5. The feedback unit further comprises a second encoder, The second encoder is positioned on the main roller, and the second encoder detects the second real-time angle of rotation of the main roller. The conveying device according to claim 3.

6. The control unit receives a detection signal and, based on the detection signal, controls the drive mechanism to bring it to a first state, thereby transporting the object from the detection position to the loading / unloading position. The conveying device according to claim 1.

7. The drive roller comprises a first rotating shaft, a drive wheel, and a first synchronous pulley, wherein the drive wheel is sleeve-mounted on the first rotating shaft, the two first synchronous pulleys are sleeve-mounted on the first rotating shaft, and the two first synchronous pulleys are arranged on two opposing sides of the drive wheel. The driven roller comprises a second rotating shaft, a driven wheel, and a second synchronous pulley, wherein the driven wheel is sleeve-mounted on the second rotating shaft, the two second synchronous pulleys are sleeve-mounted on the second rotating shaft, and the two second synchronous pulleys are arranged on two opposing sides of the driven wheel. The conveyor belt comprises a flat belt and synchronous belts connected to both sides of the flat belt, the flat belt being sleeve-mounted on the driving wheel and the driven wheel, and the synchronous belt being sleeve-mounted on the first synchronous pulley and the second synchronous pulley. The conveying device according to any one of claims 1 to 6.

8. Further equipped with a support member, The support member is positioned on the upper part of the mounting frame, and the support member supports the flat belt. The conveying device according to claim 7.

9. It also features a tensioner mechanism, The tensioner mechanism is located at the bottom of the mounting frame, and the tensioner mechanism includes a tensioner roller. The tensioner roller is suitable for moving vertically to adjust the tension of the conveyor belt. The conveying device according to any one of claims 1 to 6.

10. A conveying device according to any one of claims 1 to 9, The transport device comprises a detection device arranged in the transport direction, The transport device transports the subject from the first position to the second position. The detection device detects the subject, A detection system characterized by the following:

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