Projection sv off-line sludge settling observation device

Abstract

The utility model relates to water treatment equipment, concretely is projection type SV off -line sludge subsidence observation device, including the box, the front side of box inside is equipped with the camera, is equipped with a plurality of fixed base that interval distribution along the left and right direction of box on rear side bottom plate, is used for placing the measuring cylinder, is set up with the fixed base corresponding placement hole on the top plate, is equipped with parallel light source on one side of fixed base away from the camera, is equipped with back projection panel close to the camera one side, the utility model discloses simplifies the operation, has improved the efficiency and effect of observation and record, eliminates the influence of the reflection point on the measuring cylinder and the interference image through the setting back projection panel, and the image contour is clearer, and the image analysis is convenient, to more accurate evaluation of the settlement condition of water sample.

Description

Technical Field

[0001] This utility model relates to water sample sedimentation observation equipment, specifically a projection-type SV offline sludge sedimentation observation device. Background Technology

[0002] Sludge settling is typically observed using the Settled Sludge Volume (SV) test. This involves taking a certain amount of the mixed liquor (a mixture of activated sludge and wastewater), letting it stand in a graduated cylinder for a period of time (usually 30 minutes), and then observing the percentage of the original mixed liquor volume that has settled. This provides a quick and simple way to assess the sludge's settling performance and concentration effect, thereby indirectly determining the operating status of the aeration tank.

[0003] Currently, sludge settling observation experiments mainly rely on manual observation, which includes sampling, settling and timing, observation and recording. During the observation process, it is generally necessary to take photos and record them regularly to assess the settling of the sludge-water interface, record the settling velocity, and also pay attention to the condition of the supernatant. Manual observation and recording is cumbersome, labor-intensive, inefficient, and the observation and recording results are not good. Furthermore, when taking photos, the glass material of the graduated cylinder causes many reflective spots and interference images, affecting the image quality. This is especially true when it is necessary to analyze the light transmittance of the water sample during the settling process to assess the settling situation, making image analysis difficult and causing many inconveniences to the settling observation work. Utility Model Content

[0004] The purpose of this invention is to provide a projection-type offline sludge settling observation device to solve the problems of cumbersome work, low observation and recording efficiency, poor image quality, and weak anti-interference ability of existing manual observation and recording methods.

[0005] To achieve the above objectives, the present invention provides the following technical solution: it includes a box body, a camera is provided on the front side inside the box body, and a plurality of fixed bases are provided on the rear bottom plate at intervals along the left and right directions of the box body for placing measuring cylinders. The top plate is provided with placement holes corresponding to the fixed bases; a parallel light source is provided on the side of the fixed base away from the camera, and a rear projection projection plate is provided on the side closer to the camera.

[0006] This invention uses a housing and fixed base to house and secure a graduated cylinder containing the water sample to be observed. The sample is illuminated by a parallel light source, and a rear projection plate projects the shadow of the graduated cylinder onto it, creating a two-dimensional image. This eliminates reflections and interference from the graduated cylinder. Furthermore, the varying translucency of the water sample, based on its degree of settling, results in different brightness and transparent areas on the projection, leading to a clearer image outline and easier image analysis for more accurate assessment of the water sample's settling. The settling is then observed and recorded by capturing images using a camera. Compared to manual methods, this significantly simplifies operation and improves the efficiency and effectiveness of observation and recording. Attached Figure Description

[0007] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the structure of this utility model (the box body has); Figure 2 This is a schematic diagram of the structure of the present invention with a socket; Figure 3 for Figure 2 Schematic diagram of the structure after the light-shielding plate is installed; Figure 4 for Figure 3 Top view; Figure 5 for Figure 4 Sectional view of AA; Figure 6 for Figure 4 Sectional view of BB; Figure 7 This is a schematic diagram of the structure of the light-shielding plate in this utility model.

[0008] In the diagram, 1 is the housing, 2 is the camera, 3 is the mounting base, 4 is the placement hole, 5 is the light guide plate, 6 is the camera bracket, 7 is the card slot, 8 is the wiring box, 9 is the wiring hole, 10 is the wiring channel, 11 is the cover plate, 12 is the measuring cylinder, 13 is the light shield, 14 is the limiting hole, 15 is the light shield, 16 is the arc groove, 17 is the socket, and 18 is the rear projection plate. Detailed Implementation

[0009] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0010] like Figures 1-7As shown, the projection-type SV offline sludge settling observation device of this embodiment includes a box 1. A camera 2 is provided on the front side of the box 1, and four circular fixed bases 3 are provided on the rear bottom plate for fixing or limiting the measuring cylinder 12. The top plate has placement holes 4 corresponding to the fixed bases 3. A parallel light source is provided on the side of the fixed base 3 away from the camera 2 to illuminate the measuring cylinder 12 placed on the fixed base 3, so that the water sample in the measuring cylinder 12 is illuminated and the observation effect is improved. A rear projection projection plate 18 is provided on the side of the fixed base 3 near the camera 2. This invention uses a housing 1 and a fixed base 3 to house and fix a measuring cylinder 12 for holding water samples to be observed. The water sample is illuminated by a parallel light source, and a rear projection plate 18 projects the image of the measuring cylinder 12 onto the plate, forming a two-dimensional image. This eliminates the influence of reflections and interference on the measuring cylinder 12. Furthermore, the varying translucency of the water sample, based on its degree of sedimentation, results in different brightness and transparent areas on the projection, leading to a clearer image outline and easier image analysis for more accurate assessment of the water sample's sedimentation. The sedimentation is then observed and recorded by a camera 2. Compared to manual methods, this significantly simplifies operation and improves the efficiency and effectiveness of observation and recording.

[0011] Specifically, in this embodiment, the rear projection panel 18 is made of rigid acrylic frosted board, polycarbonate diffused board, flexible projection screen, or other professional rear projection hard screen to ensure its light transmittance and projection clarity. The rear projection panel 18 has a flat plate structure, or multiple arc-shaped grooves corresponding to and matching the size of the measuring cylinder are formed on the rear projection panel 18, so that the arc-shaped surface of the arc-shaped grooves can fit against the measuring cylinder 12. Its light transmittance is configured such that when the distance between the rear projection panel 18 and the measuring cylinder 12 is less than a preset value or when they are in contact, it can transmit the medium inside the measuring cylinder 12, including but not limited to color, appearance, or particle size distribution characteristics; when the distance between the rear projection panel 18 and the measuring cylinder 12 is greater than the preset value, it can project the shadow of the medium inside the measuring cylinder 12. The specific light transmittance can be 50%-70%, preferably made of frosted material. In this way, when the rear projection plate 18 is close enough to the measuring cylinder 12 or adopts a structure with an arc-shaped groove and fits into the measuring cylinder 12, it can basically achieve complete light transmission, so as to clearly observe the color, appearance, particle size distribution or turbidity of the water sample in the measuring cylinder 12. When the distance between the rear projection plate 18 and the measuring cylinder 12 is far, a clear projection can be achieved, which is convenient for direct analysis of sedimentation stratification and assessment of sedimentation time, etc. The specific choice can be made according to actual needs.

[0012] To make the light from the parallel light source more targeted, a light guide plate 5 can be installed between the parallel light source and the fixed base. The light guide plate 5 has multiple strip-shaped light-transmitting holes corresponding to the measuring cylinder, allowing the light to shine directly onto the measuring cylinder, further reducing the influence of interfering light and making the projection clearer. Specifically, the light guide plate 5 and the light shield 13 can be selected as one or both, depending on the desired image clarity and effect.

[0013] Meanwhile, considering the turbidity of the water sample in the measuring cylinder 12, it is generally difficult for the camera 2 to clearly capture the scale in the measuring cylinder 12. Therefore, the rear projection plate 18 is provided with a scale layer corresponding to the scale of the measuring cylinder 12. The scale of the scale layer can be set along the entire length or corresponding to the four measuring cylinders 12. In this way, the scale lines in the image captured by the camera 2 are clearer and more intuitive. The boundary between the dark area and the bright area is the location of the sedimentation interface. If there is no obvious boundary, the projection will present different brightness according to different degrees of sedimentation. This brightness corresponds to the degree of sedimentation, so it can be used to analyze and evaluate the sedimentation situation. In addition, there are no bright spots or other interfering images in the projection, which has strong anti-interference ability, high image quality, and facilitates image analysis.

[0014] In practice, due to the cylindrical shape of the measuring cylinder 12, there may be differences in light transmittance in the horizontal direction, resulting in a darker center and brighter sides in the projection. Therefore, further measures are needed to eliminate these effects. Specifically, insertion holes 17 are provided on the top plate of the housing 1, penetrating each placement hole 4. The four fixed bases 3 are distributed along the left and right directions of the housing 1. The placement holes 4 are circular holes corresponding to the shape of the fixed bases 3, and the distribution pattern of the multiple placement holes 4 corresponds to the distribution pattern of the fixed bases 3.

[0015] A light-shielding plate 13 is inserted into the insertion hole 17. The cross-section of the light-shielding plate 13 is T-shaped, including a wing plate and a web plate perpendicular to it. A limiting hole 14 matching the diameter of the measuring cylinder 12 is opened on the wing plate. The limiting hole 14 penetrates the web plate, so that the web plate forms a plurality of spaced light-shielding parts 15. The lower side of the wing plate is attached to the upper side of the top plate. The light-shielding parts 15 of the web plate are located between adjacent fixed bases 3 and between the fixed base 3 and the side plate of the box 1. The two sides of the light-shielding parts 15 can be attached to the measuring cylinder 12 or the side plate of the box 1 placed on the fixed base 3, and the lower end is attached to the bottom plate of the box 1. In this way, the light-shielding plate 13 can block most of the background light, so that the image of the measuring cylinder 12 can be projected more clearly onto the rear projection plate 18, reducing the interference of background light and improving the observation effect. Furthermore, the diameter of the placement hole 4 is equal to the diameter of the base of the measuring cylinder 12, and the diameter of the limiting hole 14 is equal to the diameter of the cylinder body of the measuring cylinder 12. This allows the wings of the light-shielding plate 13 to seal the gap between the cylinder body of the measuring cylinder 12 and the placement hole 4, thereby reducing the amount of light leakage at the placement hole 4 and further mitigating the influence of other interfering light. The limiting hole 14 also secures the cylinder body of the measuring cylinder 12, improving its stability after placement. The two sides of the light-shielding part 15 are formed into arc-shaped grooves 16 with the same diameter as the cylinder body of the measuring cylinder 12. The depth of the arc-shaped grooves 16 is greater than the wall thickness of the measuring cylinder 12. This allows the arc-shaped grooves 16 to cover a certain width of the side wall of the measuring cylinder 12, blocking some of the smaller water samples on both sides. This reduces the difference in light transmittance caused by the size of the measuring cylinder 12, resulting in a more uniform brightness and clearer image outline on the rear projection plate 18, improving image quality and thus enhancing the observation effect.

[0016] In use, first, the measuring cylinder 12 is placed into the housing 1 through the placement hole 4. The base of the measuring cylinder 12 is placed or fixed on the fixed base 3. Then, the light shield 13 is inserted through the insertion hole 17. When the light shield 13 is inserted, the two sides of the light shielding part 15 of the light shield 13 slide down against the adjacent cylinder wall of the measuring cylinder 12 or the side wall of the housing 1. Finally, the lower end of the light shield 13 is attached to the bottom plate of the housing 1, achieving complete blocking of the background light. The parallel light source can only pass through the measuring cylinder 12, thereby illuminating the water sample or sediment inside. The image of the measuring cylinder 12 is projected onto the rear projection projection plate 18 to form two-dimensional projection images with different brightness. Then, the camera 2 takes pictures to obtain projection images with clear outlines and different brightness under different sedimentation degrees, so as to facilitate subsequent analysis and evaluate the sedimentation of the water sample.

[0017] Specifically, the fixed base 3 is a circular positioning groove formed on the bottom plate of the box 1, or a positioning ring structure fixedly installed on the bottom plate of the box 1. The positioning ring is fixed to the bottom plate of the box 1 by screws. When all four measuring cylinders 12 placed on the four fixed bases 3 are included in the observation range of the camera 2, there will be a certain field of view distortion in the image captured by the camera 2. The distortion is mainly due to the inherent properties of the optical lens of the camera 2 itself. Essentially, it is caused by the inconsistent magnification of light in different areas of the lens, which is called lens distortion. Since the rear projection projection plate 18 is provided with a scale layer in this embodiment, when field of view distortion occurs, the scale line will also bend or deform to a certain extent. However, its relative position with the projection will not change, so it will not greatly affect the image analysis and the observation of the settlement interface position.

[0018] In this embodiment, the camera 2 is mounted on a camera bracket 6, which is a fixed bracket fixed to the inner wall of the housing 1. The lens of the camera 2 is located in the middle between the top and bottom plates and between the left and right side plates of the housing 1. Specifically, taking a 1000ml measuring cylinder 12 as an example, its diameter is 70mm and its height is 460mm. The camera 2 is located at the 500ml position of the measuring cylinder 12, and the distance between the camera 2 and the measuring cylinder 12 is determined so that all four measuring cylinders 12 can be included in the field of view and the field of view distortion is considered.

[0019] In addition, depending on actual needs, if it is necessary to further improve the observation effect or to eliminate the influence of lens distortion, the camera bracket 6 can also be a movable bracket, which can drive the camera 2 to move in the vertical direction, and / or the horizontal direction, and / or the front and back direction. Specifically, the movable bracket can be a single-axis, two-axis, or three-axis movable bracket. The position of the camera 2 can be changed through the conventional method of guide rails and sliders. By moving vertically, the sinking interface and brightness of the projected image can be accurately observed. By moving horizontally, the lens distortion problem can be weakened or eliminated. By moving front and back, the field of view and distortion can be adjusted. The specific structure of the movable bracket is a conventional structure, which will not be described in detail in this embodiment.

[0020] In order to reduce the reflective effect of the inner wall of the box 1 during implementation, matte paper, such as kraft paper, can be pasted on the inner wall of the box 1. Alternatively, the material of the board of the box 1 can be selected, such as matte material or surface frosting treatment, or other measures can be adopted.

[0021] In this embodiment, the parallel light source can be an LED collimating lamp, searchlight, or parallel light tube, or a similar light source, to ensure the shadow projection of the measuring cylinder 12 and the illumination of the water sample. The parallel light source is installed on the side of the fixed base 3 away from the camera, and a wiring box 8 is provided at the lower part of the housing 1 on this side. Multiple wiring holes 9 communicating with the wiring box 8 are provided at the rear end of the housing 1 for wiring or installing electrical connectors connected to external equipment. A wiring groove 10 communicating with the wiring box 8 and extending to the location of the camera 2 is provided on the bottom plate of the housing 1. A cover plate 11 is provided on the wiring groove 10 to hide the wiring. A micro switch is installed on the housing 1. One end of the micro switch is used to connect to the power supply, and the other end is connected to the camera 2 and the parallel light source.

[0022] To facilitate connection with external devices, a slot for placing external devices is provided on the housing 1. Specifically, in this embodiment, the slot is formed at the corner of the housing 1, forming an inclined plane and having a retaining edge at the bottom for placing portable external devices such as mobile phones and tablets. Of course, other structural forms can also be used, such as an independently installed external hanging structure, etc., which can be set according to actual needs.

[0023] During implementation, it also includes a host computer and a power supply. The measuring cylinder 12 is used to hold the sample to be observed, and the measuring cylinder 12 is placed on the fixed base 3 through the placement hole 4. The host computer is connected to the camera 2 through a data cable, and the power supply is connected to the micro switch.

[0024] In use, the water sample to be observed is placed in the measuring cylinder 12, and the measuring cylinder 12 is placed into the box 1 through the placement hole 4 and fixed on the fixed base 3. The light shield 13 is inserted to fix the measuring cylinder 12, and a certain dark box effect is formed on one side of the camera 2. The micro switch is turned on to power on, and the parallel light source illuminates the water sample in the measuring cylinder 12, and the image of the measuring cylinder 12 is projected onto the rear projection plate 18 to form a two-dimensional image. The camera 2 takes pictures of the projection on the rear projection plate 18, or takes pictures of the details of the water sample in the measuring cylinder according to the distance between the rear projection plate 18 and the measuring cylinder 12, and uploads them to the host computer for analysis, thereby completing the sedimentation observation and recording of the water sample.

[0025] In summary, this utility model has a simple structure, and compared with manual observation and recording methods, it is simple to operate, has high observation and recording efficiency, produces clear images with uniform brightness, and has good observation effects, thus having broad market prospects.

[0026] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0027] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0028] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A projection-type offline sludge settling observation device, characterized in that: The device includes a housing with a camera on the front side inside. The rear bottom plate has multiple fixed bases spaced apart along the left and right sides of the housing for placing measuring cylinders. The top plate has placement holes corresponding to the fixed bases. A parallel light source is located on the side of the fixed base away from the camera, and a rear projection panel is located on the side closer to the camera.

2. The projection-type SV offline sludge settling observation device as described in claim 1, characterized in that: The rear projection plate has a flat plate structure, or the rear projection plate has multiple arc-shaped grooves that correspond to and match the size of the measuring cylinder, so that the arc-shaped surface of the arc-shaped grooves can fit into the measuring cylinder.

3. The projection-type offline sludge settling observation device as described in claim 1, characterized in that: The rear projection panel is made of rigid, semi-transparent acrylic frosted plate, polycarbonate diffused plate, or flexible projection screen. Its light transmittance is configured such that when the distance between the rear projection panel and the measuring cylinder is less than a preset value or they are in contact, the light can transmit the medium inside the measuring cylinder, including but not limited to color, appearance, or particle size distribution characteristics. When the distance between the rear projection panel and the measuring cylinder is greater than a preset value, the light can project the shadow of the medium inside the measuring cylinder.

4. The projection-type offline sludge settling observation device as described in claim 1, characterized in that: The rear projection plate has a scale layer corresponding to the graduated cylinder scale.

5. The projection-type offline sludge settling observation device as described in claim 1, characterized in that: The top plate of the box is also provided with insertion holes that pass through the placement holes, allowing the measuring cylinder to be placed on the fixed base through the placement holes. A light-shielding plate is inserted into the insertion hole. The cross-section of the light-shielding plate is T-shaped, including a wing plate and a web plate perpendicular to it. A limiting hole matching the diameter of the measuring cylinder is provided on the wing plate. The limiting hole passes through the web plate, so that the web plate forms multiple spaced light-shielding parts. The lower side of the wing plate is attached to the upper side of the top plate. The light-shielding parts of the web plate are located between adjacent fixed bases and between the fixed base and the side plate of the box. The two sides of the light-shielding parts can be attached to the measuring cylinder or the side plate of the box placed on the fixed base, and the lower end is attached to the bottom plate of the box.

6. The projection-type offline sludge settling observation device as described in claim 5, characterized in that: The diameter of the placement hole is equal to the diameter of the base of the measuring cylinder, and the diameter of the limiting hole is equal to the diameter of the cylinder body, so that the wing plate of the light shield can seal the gap between the cylinder body and the placement hole.

7. The projection-type SV offline sludge settling observation device as described in claim 5, characterized in that: The two sides of the light-shielding part are formed into arc-shaped grooves with the same diameter as the measuring cylinder body, and the depth of the arc-shaped grooves is greater than the wall thickness of the measuring cylinder.

8. The projection-type offline sludge settling observation device as described in claim 1, characterized in that: The camera is mounted on a camera bracket, which is a fixed bracket fixed to the inner wall of the box, and the lens of the camera is located in the middle between the top plate and the bottom plate of the box and between the left and right side plates.

9. The projection-type offline sludge settling observation device as described in claim 6, characterized in that: A wiring box is located on the side of the enclosure away from the camera, and multiple wiring holes communicating with the wiring box are located at the rear of the enclosure. A wiring channel communicating with the wiring box and extending to the location of the camera is opened on the bottom plate of the enclosure, and a cover plate is provided on the wiring channel. Electrical connectors for connecting to external devices are installed in some of the wiring holes.

10. The projection-type offline sludge settling observation device as described in claim 6, characterized in that: A micro switch is installed on the housing. One end of the micro switch is used to connect to the power supply, and the other end is used to connect to the camera and the parallel light source.

Images