Embodiments of the present disclosure generally relate to a method and system for product inspection, and more particularly to a method and system for the inspection of fluids for defects.
Pharmaceutical fluids such as medications, supplements, or other drugs may be stored in containers, such as vials, ampules, cartridges, and pre-filled syringes. To ensure the proper, and safe preparation of these fluids, the pharmaceutical industry is focused on the inspection of the fluids while in the containers to ensure quality and safety of the product. For some medicinal and/or supplement products, inspections may be done for quality assurance or as a requirement of government or industry regulations.
To inspect the defects, cameras capture images of the fluids. The images are processed and used for defect detection and identification. Generally, it is desirable to inspect the fluids with high-frame rate cameras having a high resolution such that the defects are visible and may be tracked between subsequent images. However, due to the data rate limits of cameras, it is difficult to obtain high resolution images at a high frame rate. As such, obtaining images having high resolution and images that capture the defects without smearing of the image is difficult, thus limiting the reliability of this technique for quality control.
Therefore, what is needed is a system and method for the inspection of pharmaceutical fluids and the like, that allows for high resolution images and imaging of the defects without smearing effects.
In one embodiment, a fluid inspection system is provided. The fluid inspection system includes a transportation system configured to transport a plurality of containers of fluid through an inspection zone. The fluid inspection system further includes at least one illuminator directed to the inspection zone, one or more cameras directed to the inspection zone, and one or more actuators disposed proximate to the inspection zone and operable to rotate the plurality of containers of fluid such that the fluid within the containers remains rotating for at least a portion of time the containers are in inspection zone. The fluid inspection system further includes a controller in communication with the at least one illuminator and the one or more cameras. The controller is configured to cause the at least one illuminators to emit pulses of light according to a timing sequence and capture a plurality of images of fluid rotating in the plurality of containers disposed in the inspection zone. An illumination time of the pulses of light is less than an exposure time of each frame of the one or more cameras.
In another embodiment, a method of inspecting fluid is provided. The method includes moving a plurality of containers containing fluid into an inspection zone of an inspection system, rotating the plurality of containers containing the fluid, and stopping the rotation of the plurality of containers. The method further includes capturing a plurality of images of the plurality of containers that have stopped rotating with one or more cameras by rotating fluid disposed therein while in the inspection zone. An illumination time of pulses of light in the inspection zone is less than an exposure time of each frame of a plurality of frames of the one or more cameras.
In yet another embodiment, a non-transitory computer-readable medium is provided. The non-transitory computer-readable medium is storing instructions that, when executed by a processor coupled to an inspection system, cause the inspection system to move a plurality of containers containing fluid into an inspection zone of an inspection system, rotate the plurality of containers containing the fluid, and stop the rotation of the plurality of containers. The inspection system will further capture a plurality of images of the plurality of containers that have stopped rotating with one or more cameras by rotating fluid disposed therein while in the inspection zone. An illumination time of pulses of light in the inspection zone is less than an exposure time of each frame of a plurality of frames of the one or more cameras.
So that the manner in which the above recited features of the present disclosure can be understood in detail, a more particular description of the disclosure, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only exemplary embodiments and are therefore not to be considered limiting of its scope, and may admit to other equally effective embodiments.
To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
Embodiments of the present disclosure generally relate to a method and system for product inspection, and more particularly to a method and system for the inspection of fluids for defects. The method and system described herein is particularly advantageous for the inspection of pharmaceutical fluids, but has equal application to the inspection of other types of fluids. In this context, ‘pharmaceutical’ is not meant to be limiting as to the type of fluid described below, but provided as an example of a fluid that requires defect inspection may be inspected with the disclosed systems and by the disclosed methods.
The inspection system 100 includes at least a trigger timing generator 104, a controllers 106, a reflection illuminator 110, a transmission illuminator 112, one or more cameras 108, a computer system 116, a transportation system 126, a sensor 128, and a motor 132. The trigger timing generator 104, the controller 106, the camera 108, the reflection illuminator 110, the transmission illuminator 112, the computer system 116, the transportation system 126, and the sensor 128 may communicate via communication links 101 or remotely.
The containers 114 are provided to an inspection zone 130 of the inspection system 100 by the transportation system 126. The transportation system 126 includes, but is not limited to, a conveyor, a carousel, a robot, a pallet, or other container transportation systems operable to move the containers 114 into the inspection zone 130. The transportation system 126 is also configured to move the containers 114 out of the inspection zone 130 after inspection. During inspection, the containers 114 may be stationary in the inspection zone 130 or may be moving through the inspection zone 130. For example, the transportation system 126 may move the containers 114 to the inspection zone 130, pause the motion of the containers 114 during inspection while in the inspection zone 130, then move inspected containers 114 out of the inspection zone 130 so that the next one or more containers 114 may be moved to the inspection zone 130 for inspection. In another example, the transportation system 126 may continuously move the containers 114 through the inspection zone 130 while the containers 114 are being inspected containers 114, for example while on a conveyor.
The sensor 128 is interfaced with the transportation system 126 in a position that enables the sensor 128 to detect the position of the containers 114 while being carried by the transportation system 126. In one example, the sensor 128 will detect when the containers 114 are in the inspection zone 130. In another example, the sensor 128 will detect when the containers 114 are at a position along the transportation system 126 so that the timing of when the containers 114 will be in the inspection zone 130 can be determined. The sensor 128 generates a trigger signal when the presence of the container 114 is detected on the transportation system 126. For example, the trigger signal may be generated when the sensor 128 detects the containers 114 are in the inspection zone 130 or when the containers 114 are at a pre-determined position from which it can be determined when the containers 114 will arrive in the inspection zone 130 for inspection. The sensor 128 is coupled to and provides the trigger signal to the controller 106.
The controller 106 is configured to facilitate the control the inspection process described herein. The controller 106 is in communication with the reflection illuminator 110, the transmission illuminator 112, and the one or more cameras 108 via the communication links 101. The controller 106 is in communication with the sensor 128. Using the trigger signal provided by the sensor 128, the controller 106 determines the positional information of the containers 114 relative to the inspection zone 130. In embodiments where the controller 106 receives a trigger signal indicative of the transportation system 126 moving the containers 114 towards the inspection zone 130, the controller 106 utilizes speed information (either from a look-up table, system library, sensed or otherwise provided) to determine when the containers 114 will arrive in the inspection zone 130 and be ready for inspection.
In one example, the trigger timing generator 104 is a software that is executable by the controller 106. The trigger timing generator 104 may alternatively be hardware, a combination of hardware and software, or even a separate controller. The trigger timing generator 104 is operable to generate a timing sequence (see
As discussed above, the trigger signal and optionally the speed information provided to the controller 106 allows for the controller 106 to initiate the instructions to the reflection illuminator 110, the transmission illuminator 112, and the one or more cameras 108 when the containers 114 are in the inspection zone 130. The controller 106, based on the timing sequence provided by the trigger timing generator 104, ensures that the pulses of light are provided simultaneously with the capturing fluid images by one or more cameras 108 when the containers 114 are in the inspection zone 130.
The reflection illuminator 110 and the transmission illuminator 112 are configured to provide the pulses of light to illuminate the containers 114 while the containers 114 are in the inspection zone 130. The reflection illuminator 110 is configured to project light to the containers 114 such that the light is reflected off of the containers 114 and the fluid disposed therein. The light is reflected from the containers 114 and the fluids towards the camera 108. The transmission illuminator 112 is configured to project light through the containers 114 and the fluids disposed therein. The light is transmitted through the containers 114 and the fluids to the camera 108. The inspection system 100 is not limited to one reflection illuminator 110 and one transmission illuminator 112. The inspection system 100 may include one or more of each of the reflection illuminator 110 and the transmission illuminator 112. The reflection illuminator 110 and the transmission illuminator 112 provide the pulses of light according to the timing sequence provided by the controller 106.
The reflection illuminator 110 and the transmission illuminator 112 alternate between an “off” position, where no light is projected, and an “on” position, where light is projected to the inspection zone 130 to be incident on at least one container 114 positioned in the inspection zone 130. The sequence of toggling from the “off” position, to the “on” position, and back to the “off” position, is defined as a pulse. The reflection illuminator 110 and/or the transmission illuminator 112 are toggled from the “off” position to the “on” position according to the timing sequence executed by the controller 106. The “off” position may be achieved by turning off the reflection illuminator 110 and/or the transmission illuminator 112 or by closing a shutter on the reflection illuminator 110 and/or the transmission illuminator 112 to block the light. The “on” position may be achieved by turning on the reflection illuminator 110 and/or the transmission illuminator 112 or by opening a shutter on the reflection illuminator 110 and/or the transmission illuminator 112 to provide light to the inspection zone 130. In some embodiments, which can be combined with other embodiments described herein, only the reflection illuminator 110 projects light to the fluid contained in the at least one container 114 present in the inspection zone 130. In other embodiments, only the transmission illuminator 112 projects light to the fluid contained in the at least one container 114 present in the inspection zone 130. In yet another embodiment, which can be combined with other embodiments described herein, both the transmission illuminator 112 and the reflection illuminator 110 simultaneously project light to the fluid contained in at least one container 114 present in the inspection zone 130.
The inspection system 100 further includes the one or more cameras 108. The cameras 108 are positioned to capture images of the fluids in the containers 114 in the inspection zone 130. For example, cameras 108 may be disposed around the containers 114 at intervals of 120° such that each of the cameras 108 captures images of one third of the containers 114. Each camera 108 is positioned to capture images of at least a portion of the fluid, with all of the cameras 108 capable of imaging an entire surface of the containers 114. Each camera 108 is a high-resolution camera. The resolution of each camera 108 is greater than at least 20 MP. For example, the resolution of each camera is about 25 MP. The cameras 108 have a frame rate between about 10 FPS and about 15 FPS. For example, the frame rate of each camera 108 is 15 FPS.
The computer system 116 includes a processor 120 and a data storage (i.e., memory) 124. The processor 120 communicates with the data storage 124. The computer system 116 may also communicate with remote servers 122 via a local connection (for example, a Storage Area Network (SAN) or Network Attached Storage (NAS)) or over the Internet. The computer system 116 may be configured to all one or more of the servers 122 to either directly access data (i.e., the images) included in the data storage 124 or to interface with a database manager that is configured to manage the data included within the data storage 124. The computer system 116 may also include components of a computing device, for example, a processor, system memory, a hard disk drive, a battery, input devices such as a mouse and a keyboard, and/or output devices such as a monitor or graphical user interface, and/or a combination input/output device such as a touchscreen which not only receives input but also displays output. The computer system 116 controls the operation of the controller 106. The processor 120 of the computer system 116 may execute software, such as programs and/or other software applications stored in the data storage 124 of the computer system 116, and access applications managed by servers 122. In the embodiments described below, users may respectively operate the computer system 116 that may be connected to the servers 122 over the communications network. The processor 120 of the computer system 116 may also execute other software applications configured to receive content and information (e.g., images) from the camera 108, and make determinations regarding the fluid contained in the images provided by the camera 108.
In operation, the trigger signal is generated by the sensor 128 when the containers 114 enter the inspection zone 130. The trigger signal is an electric signal. The trigger signal is provided to the trigger timing generator 104. The trigger timing generator 104 provides the timing sequence to the controller 106. The controller 106, based on the timing sequence, causes the reflection illuminator 110 and/or the transmission illuminator 112 to provide pulses of light to the inspection zone 130. The controller 106, also based on the timing sequence, causes the one or more cameras 108 to capture images of the containers 114 and fluid disposed therein while the containers 114 are in the inspection zone 130 and illuminated by one or both of the reflection illuminator 110 and the transmission illuminator 112. The images captured by each camera 108 are provided to the computer system 116. The images provided to the computer system 116 are processed and optionally displayed. The computer system 116 utilizes image comparison or other technique to detect defects within the fluids disposed in the containers 114. For example, the computer system 116 may compare images captured by the cameras 108 to library images stored in the data storage 124 of the computer system 116. The library images may include images of fluid without defects and images of known fluid defects. Based on the image comparison, defects in the fluid are detected, identified, and categorized. The defects may be categorized into a defects report 118 and associated with the container 114 which contain the fluid from which the images was captured.
The plurality of containers 114 include fluids 202 disposed therein. Each container 114 includes a cap 204 to seal the fluid 202 therein. Each container 114 is positioned on an actuator 206. The actuators 206 are disposed on or coupled to the carrier 208. The actuators 206 are configured to hold the containers 114 while being transported though the inspection system 100. The actuators 206 also are rotatable relative to the carrier 208, such that the containers 114 held by the actuators 206 may be rotated while retained in the carrier 208. In one example, the actuators 206 are coupled to the carrier 208 by one or more bearings or bushings, and may be one of a cup, gripper, or any other device suitable for holding the containers 114 both when rotating and being transported through the system 100 on the carrier 208. Rotation of the actuators 206 is driven by at least one motor 132. The motor 132 may be disposed on the carrier 208 or may selectively extend through the carrier 208 to engage and rotate the actuators 206 holding the containers 114. In one example, the motor 132 may be disengaged from the actuators 206 and move clear of the carrier 208 to allow the carrier 208 to be moved through the inspection system 100. In some examples, each actuator 206 is engaged with a respective motor 132 so that all of the containers 114 may be rotated on the carrier 208 simultaneously. In another example, the motor 132 is coupled to a rotation system 214. The rotation system 214 may be a gear box system, a belt system, or any other system configured to distribute power provided from the motor 132 to each of the actuators 206. In one example, each carrier 208 may include an on-board rotation system 214. Alternatively, the rotation system 214 may selectively engage the actuators 206 of the carrier 208. The rotation system 214 links the plurality of actuators 206 together. The motor 132 is configured to engage with the rotation system 214 when the containers 114 in the carrier 208 are to be rotated. The motor 132 provides power to the rotation system 214. The rotation system 214 is configured to rotate each of the actuators 206 at the same rate. The motor 132 is also configured to disengage from the rotation system 214 to allow the carrier 208 to move freely after the containers 114 have been rotated.
Prior to and/or while capturing images of the fluid 202, the actuators 206 rotate each container 114. For example, the actuators 206 rotate the containers at about 6000 RPM. The rotation of the containers 114 induces defects, such as dirt, glass, metals, or other particulates, to separate from the fluid 202. In one example, the separated defects float to the top of the fluid 202. The actuators 206 may be turned off once defects are detected by the cameras 108, after a predefined period of time and/or after the containers 114 have been rotated a predefined number of revolutions. The plurality of cameras 108 capture images of the rotated fluid 202. The actuators 206 are in communication with the controller 106. The controller 106 is operable to instruct the actuators 206 when to rotate the plurality of containers 114 and when to hold the plurality of containers 114 stationary based on the timing sequence.
Each frame corresponds to an image captured by a camera 108. The first frame 301, the second frame 302, and the third frame 303 each correspond to subsequent images captured of a container 114 of fluid 202 (shown in
Each of the first frame 301, the second frame 302, and the third frame 303 include an illumination level 314. The illumination level 314 spans from a minimum illumination level 308 to a maximum illumination level 310. The illumination level 314 corresponds to an amplitude of at least one of a reflection illuminator 110 and/or a transmission illuminator 112 directed to the one or more containers 114. The minimum illumination level 308 corresponds to a 0% amplitude (no illumination). The maximum illumination level 310 corresponds to a 100% amplitude. The first frame 301 includes a first pulse 304, the second frame 302 includes a second pulse 305, and the third frame 303 includes a third pulse 306. Each of the first frame 301, the second frame 302, and the third frame 303 include an exposure time 316. The exposure time 316 is defined as the amount of time that each frame is exposed for (i.e., amount of time a shutter in the cameras 108 are open). The exposure time 316 may be the same as the time to capture each frame. For example, a 10 FPS frame rate will have each frame being captured for 0.1 s.
As shown in
Each frame corresponds to an image captured by a camera 108. The first frame 401, the second frame 402, and the third frame 403 each correspond to subsequent images captured of a container 114 of fluid 202 (shown in
Each of the first frame 401, the second frame 402, and the third frame 403 include an illumination level 414. The illumination level 414 spans from a minimum illumination level 408 to a maximum illumination level 410. The illumination level 414 corresponds to an amplitude of at least one of a reflection illuminator 110 and/or a transmission illuminator 112 directed to the one or more containers 114. The minimum illumination level 408 corresponds to a 0% amplitude (no illumination). The maximum illumination level 410 corresponds to a 100% amplitude. The first frame 401 includes a first pulse 404, the second frame 402 includes a second pulse 405 and a third pulse 406, and the third frame 403 includes a fourth pulse 407. Each of the first frame 401, the second frame 402, and the third frame 403 include an exposure time 416. The exposure time 416 is defined as the amount of time that each frame is exposed for (i.e., amount of time a shutter in the cameras 108 are open). The exposure time 416 may be the same as the time to capture each frame. For example, a 10 FPS frame rate will have each frame being captured for 0.1 s.
As shown in
The time t (corresponding to the horizontal axis 412) between the first pulse 404 and the second pulse 405 is less than the time t between the second pulse 405 and the third pulse 406. Similarly, the time t (corresponding to the horizontal axis 412) between the third pulse 406 and the fourth pulse 407 is less than the time t between the second pulse 405 and the third pulse 406. Providing the second pulse 405 and the third pulse 406 at the intermediate illumination level 418 prevents oversaturation of an image captured during the second frame 402. As such, the illumination level 414 is maintained at the minimum illumination level 408 except for when each of the first pulse 404, the second pulse 405, the third pulse 406, and the fourth pulse 407 are provided. The first pulse 404, the second pulse 405, the third pulse 406, and the fourth pulse 407 are provided at the maximum illumination level 410 and/or the intermediate illumination level 418 for an illumination time 426. The illumination time 426 is the time that each of the first pulse 404, the second pulse 405, the third pulse 406, and the fourth pulse 407 are provided. The illumination time 426 is less than each exposure time 416 for each frame. The illumination time 426 is about 20 μs to about 100 μs.
Each of the containers 114 includes a plurality of defects 504. The first image 501 is captured when a first pulse 404 (shown in
As the fluid 202 is rotating in the containers 114 due to rotation from the actuators 206 prior to capturing images of the fluid 202, the defects 504 are moving within the containers 114. As the first pulse 404 occurs in a second portion 424 of the exposure time 416 of the first frame 401 and the second pulse 405 occurs in a first portion 422 of the exposure time 416 of the second frame 402, the first group 506 of defects 504 are captured with the first image 501 and the subsequent second image 502. Additionally, as the third pulse 406 occurs in a second portion 424 of the exposure time 416 of the second frame 402 and the fourth pulse 407 occurs in the first portion 422 of the exposure time 416 of the third frame 403, the second group 508 of defects 504 are captured with the second image 502 and the subsequent third image 503.
By analyzing the images of the fluid containing different groups of defects 504 (e.g., the first group 506 and the second group 508), the defects 504 can be detected, identified, and categorized. As shown in
The second image 502 includes the first group 506 and the second group 508. The first group 506 is captured in the second image 502 from the second pulse 405. The second group 508 is captured in the second image 502 from the third pulse 406. The first group 506 and the second group 508 of the defects 504 are super-positioned on the second image 502. The first group 506 and the second group 508 in the second image 502 each have half the intensity as in the first image 501 and the third image 503 due to illumination being provided at an intermediate illumination level 418 (shown in
Capturing the plurality of images 500 according to the second pulsated illumination configuration 400 allows for the first group 506 and the second group 508 of the defects 504 to be captured without significant smearing of the defects 504 in the plurality of images 500. As the first pulse 404 and the second pulse 405 are provided subsequently and within subsequent portions of the adjacent exposure times 416 along the horizontal axis 412, the defects 504 avoid smearing in the plurality of images and remain present in a field of view of the camera 108. Similarly, as the third pulse 406 and the fourth pulse 407 are provided subsequently and within subsequent portions of the adjacent exposure times 416 along the horizontal axis 412, the defects 504 avoid smearing in the plurality of images and remain present in a field of view of the camera 108 between subsequent images 500.
The defect 504 corresponding to the first tracking line 510 remains stationary in the vertical direction 516. As such, the defect 504 corresponding to the first tracking line 510 may be identified and categorized as an exterior defect. Further, identifying the movement of the defects in the vertical direction 516 allows for proper identification of the defects 504. For example, the defects 504 may be identified as air bubbles or particles in the fluid 202. The defect 504 corresponding to the second tracking line 512 moves away from the cap 204 from the first image 501 to the second image 502. As such, the defect 504 corresponding to the second tracking line 512 may be identified and categorized as a particle defect. The defect 504 corresponding to the third tracking line 514 moves toward the cap 204 from the first image 501 to the second image 502. As such, the defect 504 corresponding to the third tracking line 514 may be identified and categorized as an air bubble (rises to the top of the container 114). Proper identification of the air bubbles improves the accuracy and precision of the fluid inspection process, as many air bubbles will disappear after a set period of time and are not detrimental to the quality of the fluid 202.
At operation 601, a plurality of containers 114 are positioned in a carrier 208 and moved into an inspection zone 130 of the inspection system 100. The carrier 208 is moved to the inspection zone 130 by the transportation system 126. Each of the plurality of containers 114 contains a fluid therein. The carrier 208 is configured to allow a plurality of actuators 206 to respectively engage each of the containers 114. Each of the plurality of containers 114 are positioned on or engaged with an actuator of the plurality of actuators 206. One or more cameras 108 of the inspection system 100 are directed to the plurality of containers 114 in the inspection zone 130. A sensor 128 detects the presence of the plurality of containers 114. The sensor 128 provided a trigger signal to the controller 106.
At operation 602, the plurality of containers 114 are rotated. A motor 132 engages with a rotation system 214. The rotation system 214 links together a plurality of actuators 206. The motor 132 provides power to the rotation system 214. The plurality of actuators 206 are rotated. The actuators 206 rotate the plurality of containers 114 disposed on the actuators 206. The actuators 206 rotate the plurality of containers 114 based on instructions received from the controller 106 or another controller. The instructions from the controller 106 provided to the motor 128 may be based on the trigger signal, signal from another sensor, or based on a timing sequence generated by the trigger timing generator 104 (as described at operation 604). While the containers 114 are rotated, defects separate from the fluid 202. The containers 114 may be rotated before entering the inspection zone 130, and/or when in the inspection zone 130. The actuators 206 are rotated at a rotation rate. For example, the rotation rate is about 6000 RPM.
At operation 603, the plurality of containers 114 stop rotating. The motor 132 disengages from the rotation system 214. The plurality of actuators 206 stop rotating. For a time after the plurality of containers 114 have stopped rotating, the fluid 202 therein continues to rotate within the containers 114. The controller 106 is operable to instruct the motor 132 to disengage. As the plurality of containers 114 remain stationary while the fluid continues to rotate, exterior defects will remain in the same location on the stationary container 114 while the fluid defects will rotate with the fluid.
At operation 604, a timing sequence is generated based on receipt of the trigger signal by the controller 106. The timing sequence is generated by a trigger timing generator 104. The timing sequence can correspond to the first pulsated illumination configuration 300 (shown in
At operation 605, pulses of light are provided by a reflection illuminator 110 and/or a transmission illuminator 112 to illuminate the containers of rotated fluid 202 in the inspection zone 130. Upon instruction from the controller 106, the pulses of light are provided according to the timing sequence. The reflection illuminator 110 and/or the transmission illuminator 112 are toggled from the “off” position to the “on” position according to the timing sequence. Each pulse is emitted at an illumination time 320, 426. The illumination time 320, 426 is less than an exposure time 316, 416 (see
In some embodiments, the reflection illuminator 110 and/or the transmission illuminator 112 may be configured to emit visible light, while in other embodiments, different wavelengths may be emitted (e.g., ultraviolet, infrared). In other embodiments, which can be combined with other embodiments described herein, the reflection illuminator 110 and the transmission illuminator 112 may be configured to emit multiple wavelength. In one embodiment, which can be combined with other embodiments described herein, the transmission illuminator 112 emits red light. In another embodiment, which can be combined with other embodiments described herein, the reflection illuminator 110 emits blue light.
At operation 606, a plurality of images are captured by the at least one camera 108. The timing of the image capture is coordinated with the illumination of the fluid based on instructions from the controller 106. As such, the one or more cameras capture images of the containers 114 in the inspection zone 130 based on the timing sequence. Providing the pulses of light at the illumination time 320, 426 less than the exposure time 316, 416 allows for the cameras 108 to have high-resolution capability without smearing of the defects in the images. Because light is only provided to the cameras 108 during the pulses from the illuminators 110, 112, the images of the defects do not smear due to the illumination time 320, 426 being less than the exposure time 316, 416. The reflection illuminator 110 and/or the transmission illuminator 112 will emit (“on” position) the light during each frame. Each frame 301-303, 401-402 (see
Data-rate limits in cameras generally prevent using high-frame rate cameras with high-resolution capabilities. The one or more cameras 108 are low frame rate cameras with high-resolution capabilities. The low-frame rate of the cameras 108 (which generally will lead to smearing effects when capturing images of moving objects) is remedied with the use of the pulses of light (the objects in the images will only be seen in the images when the pulse of light is provided). To ensure that the defects (which are moving within the containers 114, as a function of the rotation) are tracked from image to image, the pulses of light may be provided according to the second pulsated illumination configuration 400, as described above. The high-resolution capabilities which are able to be utilized as a function of the lower frame rate will improve identification and categorization of the defects in the images. The high-resolution images without smearing allow for identification of what the defect is. For example, dirt, glass, metals, or other particulates that float in the fluid 202 can be identified. Tracking the defects from image to image allows for classification of the defects. For example, a defect may be determined to be an interior defect (in the fluid 202) or an exterior defect (on the container 114). Further, the defects can be identified as air bubbles.
At operation 607, the plurality of images are processed in a computer system 116 to determine if defects are present. If defects are present, a defect report 118 is generated. The plurality of images are processed by the computer system 116 to compare the images to a library of images to determine if defects are present within the fluids of the containers 114. The plurality of images are processed with an image processing software. From the processed images, defects can be identified and categorized.
At operation 608, the plurality of containers 114 are moved from the inspection zone 130 by the transportation system 126. Another (i.e., second) set of containers 114 may be provided to the inspection zone 130 and the operations 602-607 may be repeated to inspect another batch of fluids.
In summation, a method and system for the inspection of fluids for defects is provided herein. A plurality of containers with fluids disposed therein are inspected for defects in an inspection system. A timing sequence is used to control the timing of light pulses directed to the fluid residing in the plurality of containers. A high-resolution camera is utilized to obtain images of the fluid disposed in the plurality of containers. The inspection system and method of utilizing the inspection system allows for high-resolution images of the fluid for enhanced detection of defects therein or defects on the containers itself.
While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
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International Search Report and Written Opinion dated May 11, 2023 for Application No. PCT/US2023/011355. |
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20230254589 A1 | Aug 2023 | US |