A water-sensitive paper droplet rapid detection device

Abstract

The invention discloses a device for rapid detection of mist droplets on water-sensitive paper, comprising a shell, a photographing device, a light-filling device, an adjusting device and a display screen; a test hole connected to an inner cavity of the shell is opened in a test area of ​​the water-sensitive paper, and a film carrier is mounted in the test hole; the photographing device comprises a camera and an adjusting seat; the camera is located below the test hole, the camera is directly opposite to and perpendicular to the center line of the film carrier, the light-filling device comprises a diffuser plate, a lamp holder and a lamp bead; the adjusting device comprises a driving end, a screw rod, a positioning rod and a threaded sleeve; the driving end is transmission-connected to the screw rod for driving the screw rod to rotate, the threaded sleeve is threadedly connected to the screw rod, and the adjusting seat is fixed on the threaded sleeve; the invention provides a device for rapid detection of mist droplets on water-sensitive paper, which is mainly used for detecting water-sensitive paper at a test site, can translate the camera to ensure that the center of each segmentation unit is directly opposite to the camera, reduces errors, improves the accuracy of water-sensitive paper mist droplet detection, and is easy to operate.

Description

Technical Field

[0001] The invention belongs to the technical field of plant protection pesticide application detection, and specifically relates to a water-sensitive paper droplet rapid detection device. Background Art

[0002] Agricultural water-sensitive paper is often used in fields, agricultural machinery laboratories and other environments to measure the droplet deposition distribution of different spray methods, to detect the spraying effect of the equipment, and to evaluate the performance and operating parameters of the spraying equipment. It has a wide range of uses.

[0003] The working principle of water-sensitive paper is that it develops color when it encounters water or other solutions, thus forming a deposition pattern of spray droplets on the paper surface. A clear water-sensitive paper image is the premise and basis for obtaining data such as droplet density, particle diameter, and droplet number, making stable image acquisition methods particularly important.

[0004] At present, there is still a lack of equipment to directly obtain water-sensitive paper images at the test site. The conditions for obtaining water-sensitive paper images at the field test site are relatively poor, with problems such as chaotic ambient light and severe turbulent wind. Therefore, the collection of water-sensitive paper information is currently mainly completed in the laboratory.

[0005] However, with the rapid development of smart phones in recent years, the cameras of some mobile phones can take photos with tens of millions of pixels, which has become a potential new solution to quickly obtain water-sensitive paper images on site. There are also existing tools that use mobile phones as photography tools, but due to its structural defects, the mobile phone is easy to shake when taking pictures, resulting in poor photography effects and no effective fill light. In addition, more importantly, the existing detection tools suitable for the test site, the water-sensitive paper surface is not perpendicular to the camera, only through one photo, and then use the image processing tool to segment the picture, the picture is processed into multiple segmentation units, and then the segmentation units are processed. This processing method causes the picture facing the camera and the picture deviating from the camera to have an angle deviation, which affects the detection. There is a deviation in the perspective between the segmentation units. With the improvement of requirements, this camera device cannot meet the requirements. At the same time, the existing camera tools cannot take pictures one by one, which brings trouble to the detection personnel. Therefore, it is necessary to study a water-sensitive paper droplet rapid detection device. Summary of the invention

[0006] In view of the defects and problems existing in the existing equipment, the present invention provides a water-sensitive paper droplet rapid detection device, which effectively solves the problem that the camera in the existing equipment cannot move, resulting in the camera being unable to face each segmented unit of the water-sensitive paper when shooting, causing errors in the image processing of the procedure.

[0007] The solution adopted by the present invention to solve the technical problem is: a water-sensitive paper droplet rapid detection device, including a shell, a camera device, a fill light device, an adjustment device and a display screen; the top surface of the shell is provided with a display screen installation area and a water-sensitive paper test area, the display screen is installed in the display screen installation area, the water-sensitive paper test area is provided with a test hole connected to the inner cavity of the shell, and a carrier is installed in the test hole; the camera device includes a camera and an adjustment seat; the camera is located below the test hole, the camera is directly opposite to and perpendicular to the center line of the carrier, the camera is fixedly installed on the adjustment seat and connected to the display screen connection; the fill light device includes a diffuser plate, a lamp holder and lamp beads; the diffuser plates are arranged on both sides of the test hole, the lamp holders are arranged on the outside of the diffuser plates in parallel and at intervals, and the lamp beads are installed on the lamp holders; the adjustment device includes a driving end, a screw rod, a positioning rod and a threaded sleeve; the driving end is transmission-connected to the screw rod for driving the screw rod to rotate, the threaded sleeve is threadedly connected to the screw rod, a positioning sleeve is arranged on the outside of the screw rod, the positioning rod is arranged on the outside of the screw rod, and a matching sleeve is installed in the positioning sleeve; the adjustment seat is fixed on the threaded sleeve, so that the camera can translate along the center line direction of the slide below the slide.

[0008] Furthermore, the driving end is a stepping motor, and the rotating shaft of the stepping motor is connected to the screw through a coupling.

[0009] Furthermore, the display screen is a touch-controlled display screen, and the display screen is connected to the camera and the stepper motor via a circuit board.

[0010] Furthermore, positioning sleeves are provided on both sides of the threaded sleeve, positioning rods are provided on both sides of the screw rod, and the two positioning sleeves are correspondingly sleeved in the positioning rods.

[0011] Furthermore, the driving end is a hand wheel.

[0012] Furthermore, the test hole is a square structure, a baffle is provided at the bottom of the test hole, and the slide is fixed on the baffle.

[0013] Furthermore, the adjustment seat includes a vertical plate and a horizontal plate, the upper end of the vertical plate is fixed or integrally connected to the outer side of the positioning sleeve, and a slot is provided on the horizontal plate, in which a sleeve plate is mounted. The sleeve plate can slide in the slot and can be locked by a top screw on the side of the slot, and the camera is installed on the sleeve plate.

[0014] Furthermore, the lamp beads are installed at intervals in the middle of the lamp holder along the horizontal direction and are perpendicular to the diffuser plate.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a shell, in which a photographing device, a fill light device, an adjusting device and a display screen are arranged, wherein the photographing device is used to take pictures of the water-sensitive paper, the fill light device ensures the photographing effect, and the adjusting device is used to adjust the position of the camera, and the camera is translated a corresponding distance according to the segmentation width so that it can always face the segmentation area, ensuring that the camera can face the water-sensitive paper when shooting, and then the image processing tool is used to intercept the corresponding width of the center of the picture, and then the image is processed.

[0016] The present invention utilizes the rotation of the screw rod to drive the threaded sleeve to translate. The screw rod can be driven by a stepper motor or a handwheel, and the working modes are diverse. Positioning sleeves are provided on both sides of the threaded sleeve. The positioning rod is sleeved in the positioning sleeve, which can guide the threaded sleeve and ensure the stability of the threaded sleeve.

[0017] At the same time, the present invention is provided with a touch display screen, which can not only display the captured images of the camera, but also serve as a control terminal for controlling the rotation direction of the stepper motor (the translation of the camera), the camera shooting (shooting button) and the brightness of the lamp beads. It is easy to use and has various functions. One interface can operate multiple components, and the operation is convenient, ensuring the effect of each shooting.

[0018] Therefore, the present invention provides a rapid detection device for water-sensitive paper droplets, which is mainly used for detecting water-sensitive paper at a test site. The camera can be translated so that the camera can always face the shooting segmentation unit, that is, ensuring that the center of each segmentation unit faces the camera, thereby reducing errors and improving the accuracy of water-sensitive paper droplet detection. The device is easy to operate and ensures the accuracy of the test results. It is a major innovation in water-sensitive paper droplet detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 for Figure 1 Top view of the .

[0021] Figure 3 for Figure 1 Front view of .

[0022] Figure 4 for Figure 1 Another perspective structural diagram of .

[0023] Figure 5 Schematic diagram of the internal structure of the shell.

[0024] Figure 6 for Figure 5 Front view of .

[0025] Figure 7 for Figure 5 Top view of the .

[0026] Figure 8 for Figure 5 Another perspective structural diagram of .

[0027] Fig. 9 It is a structural schematic diagram of the fill light device.

[0028] The numbers in the figure are: 1 is the shell, 2 is the display screen, 3 is the film carrier hole, 4 is the Raspberry Pi optical fiber port, 5 is the Raspberry Pi USB port; 6 is the switch, 7 is the power supply, 8 is the circuit board, 9 is the stepper motor, 10 is the coupling, 11 is the screw rod, 12 is the shaft seat, 13 is the threaded sleeve, 14 is the positioning sleeve, 15 is the positioning rod, 16 is the adjustment plate, 17 is the camera, 18 is the lamp holder, 19 is the lamp bead, 20 is the diffuser, 21 is the vertical plate, 22 is the horizontal plate, and 23 is the sleeve plate. DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0030] Example 1: This example aims to provide a rapid detection device for water-sensitive paper droplets, which is mainly used to detect water-sensitive paper at the test site. In view of the fact that the camera in the existing detection device cannot be moved, the image is obtained by only taking a single photo, and then the image is segmented using an image processing tool. This method causes a deviation between the area facing the camera and the camera that deviates from a certain angle. Due to the obvious error in the case of a close shooting distance, the processed image segmentation unit that deviates from the center has an error compared to the actual situation. Therefore, it is necessary to study a water-sensitive paper droplet detection device with a movable camera.

[0031] like Figure 1-9 As shown, the detection device includes a shell 1, a camera device, a fill light device, an adjustment device and a display screen 2; in this embodiment, the shell 1 has a basic square structure with a hollow area inside, and the camera, fill light and adjustment devices are installed in the hollow area.

[0032] The top surface of the shell 1 is provided with a display screen installation area and a water-sensitive paper test area, the display screen 2 is installed in the display screen installation area, the water-sensitive paper test area is provided with a test hole connected to the inner cavity of the shell, and a carrier 3 is installed in the test hole; the test hole is a square structure, and a baffle is provided at the bottom of the test hole, and the carrier 3 is fixed on the baffle; when the water-sensitive paper is tested, its test surface is attached to the carrier 3, and the carrier 3 is a transparent glass structure, which is fixed on the baffle by adhesion. Although the back of the water-sensitive paper has a certain light-shielding ability, the test site Most of the shooting environments are open air. In order to further provide a good environment for shooting and avoid strong light from penetrating the water-sensitive paper, the water-sensitive paper is embedded in the test hole, and a cover is provided on the outside of the test hole. A slide groove is provided on the outside of the test hole. Both sides of the cover are mounted in the slide groove and can slide along the slide groove, so that the upper end of the water-sensitive paper can be closed to avoid the influence of strong light on shooting. At the same time, the water-sensitive paper can be further fixed to prevent it from moving during shooting and affecting the shooting results. When not in use, the cover can close and protect the slide.

[0033] The photographing device includes a camera 17 and an adjustment seat 16; the camera 17 is located below the test hole, the camera 17 is directly opposite to and perpendicular to the center line of the carrier 3, the camera 17 is fixedly mounted on the adjustment seat 16, and is connected to the display screen 2; so that the picture taken by the camera 17 can be displayed on the display screen 2. In this embodiment, the display screen is a touch-controlled display screen, and there are control buttons for controlling the shooting on the display screen. The display screen 2 is connected to the camera 17 through the circuit board 8. At the same time, there is a screenshot tool on the display screen 2, which can process the image in real time and perform comparative analysis. At the same time, a storage module is provided on the circuit board, and the photographed files can be exported using a data cable. The circuit board is also provided with a Raspberry Pi optical fiber port 4 and a Raspberry Pi USB port 5.

[0034] The fill light device includes a diffuser plate 20, a lamp holder 18 and lamp beads 19; the diffuser plate 20 is arranged on both sides of the test hole, the lamp holder 18 is arranged parallel and spaced on the outside of the diffuser plate 20, and the lamp beads 19 are installed on the lamp holder 18; the specific test hole is a square hole arranged in the horizontal direction, the diffuser plate is parallel to the long side of the square hole, and is located on both sides of the square hole, the area between the two diffuser plates is the shooting area, and the light emitted by the lamp beads provides a soft light source for the shooting area after passing through the diffuser plate. At the same time, the lamp beads are installed in the middle of the lamp holder at intervals along the horizontal direction and perpendicular to the diffuser plate to ensure the ambient light for shooting and improve the shooting effect.

[0035] The adjusting device comprises a driving end, a screw rod 11, a positioning rod 15 and a threaded sleeve 13; the driving end is connected to the screw rod 11 for driving the screw rod 11 to rotate, the threaded sleeve 13 is threadedly connected to the screw rod 11, and the other end of the screw rod is rotatably mounted on the shaft seat 12, a positioning sleeve 14 is arranged on the outside of the threaded sleeve 13, the positioning rod 15 is arranged on the outside of the screw rod 11, a through positioning hole is opened at the center of the positioning sleeve 14, and the positioning rod 15 is matched and mounted in the positioning hole; the adjusting seat 16 is fixed on the threaded sleeve 13, so that the camera 17 can be translated along the center line direction below the carrier 3. In this embodiment, the driving section is a hand wheel, and the rotation direction of the screw rod is adjusted by forward or reverse rotation of the hand wheel, so that the camera is translated left and right.

[0036] At the same time, the power supply 7 is placed on the power supply fixing frame of the shell, and the power supply 7 provides power support for the device, and its switch 6 is set on the side of the shell.

[0037] During the specific implementation of this embodiment, the power is started, the device is turned on, the cover is opened, the surface of the slide is cleaned, the water-sensitive paper for the test is placed on the slide with the side having the droplet marks facing and attached to the slide, and then the test hole is closed with the cover. The position of the camera and the environmental conditions are observed on the display screen, the brightness of the lamp beads is adjusted, and the position of the camera is adjusted by operating the control end. The camera captures an image of the water-sensitive paper with relatively uniform light intensity. After completion, the camera is moved to the next location to take pictures. Finally, the droplet deposition characteristics are transmitted to the display screen after extraction, image enhancement, filtering, binarization, and adhesion segmentation by the Raspberry Pi.

[0038] Therefore, this embodiment extracts, segments and counts the droplet marks on the water-sensitive paper, which is easy to operate and will not affect the evaluation results due to uneven light intensity of mobile phone photography. A handheld water-sensitive paper photography monitoring device is provided, which can meet the test requirements of droplet deposition distribution parameter determination and other test requirements for high-quality water-sensitive paper images.

[0039] Embodiment 2: This embodiment is basically the same as Embodiment 1, except that the driving end of this embodiment is a stepping motor.

[0040] The driving end is a stepper motor 9, the rotating shaft of the stepper motor 9 is connected to the screw rod 11 through a coupling 10, the display screen 2 is a touch-controlled display screen, the display screen is connected to the camera 17 and the stepper motor 9 through a circuit board 8, the power supply 7 provides power support for the stepper motor 9, and the display screen 2 also serves as a control terminal of the stepper motor to control the steering of the stepper motor.

[0041] Therefore, this embodiment provides a method in which a stepping motor is controlled by a touch screen and a power supply is used to drive the stepping motor, thereby rotating the lead screw. The method is easy to use and adjust, has a high degree of automation, and has simple operation steps.

[0042] Embodiment 3: This embodiment is basically the same as Embodiment 1, except that: a double positioning rod 15 is provided in this embodiment.

[0043] Positioning sleeves 14 are arranged on both sides of the threaded sleeve, and positioning rods 15 are arranged on both sides of the screw rod 11, and the two positioning sleeves are correspondingly sleeved in the positioning rods.

[0044] This embodiment is provided with double positioning rods 15, which are symmetrically arranged on both sides of the screw rod. The positioning sleeve 14 is a square block structure with a positioning hole in the middle. The positioning rod is sleeved in the positioning hole to ensure that the threaded sleeve can translate smoothly along the positioning rod, thereby improving the stability of the equipment.

[0045] At the same time, the adjustment seat includes a vertical plate 21 and a horizontal plate 22. The upper end of the vertical plate 21 is fixed or integrally connected to the outer side of the positioning sleeve 14. The horizontal plate 22 is provided with a slot, and a sleeve plate 23 is installed in the slot. The sleeve plate 23 can slide in the slot and can be locked by the top screw on the side of the slot. The camera 17 is installed on the sleeve plate 23, and the top screw is set on the bottom surface. The bottom surface of the shell is buckled on the shell body, so that the Y-direction position of the camera in the shooting area can be adjusted.

[0046] Embodiment 4: This embodiment is basically the same as Embodiment 3, except that: in this embodiment, the shooting area of ​​the camera 17 is limited to between the partitions.

[0047] Vertical partitions are arranged on both sides of the horizontal plate 22, so that the partitions on both sides, the diffuser plates on both sides, the horizontal plate at the bottom and the top surface of the shell form a shooting area (rectangular shape) of the camera. The partitions limit the shooting angle of the camera within a certain range (the interval between the two partitions is the image segmentation width), and there is no need to segment the image later. At the same time, scale lines are arranged on the inner long sides of the test holes. The scale lines are within the shooting area and are displayed on the captured image. The scale lines are used to mark the position of the partitions, and the position of the shooting area on the water-sensitive paper is judged according to the reading of the partition on the scale lines, that is, the position of the segmentation unit on the water-sensitive paper.

Claims

1. A water-sensitive paper droplet rapid detection device, characterized in that: It comprises a shell, a photographing device, a fill light device, an adjustment device and a display screen; the top surface of the shell is provided with a display screen installation area and a water-sensitive paper test area, the display screen is installed in the display screen installation area, the water-sensitive paper test area is provided with a test hole connected to the inner cavity of the shell, and a carrier is installed in the test hole; the photographing device comprises a camera and an adjustment seat; the camera is located below the test hole, the camera is directly opposite to and perpendicular to the center line of the carrier, the camera is fixedly installed on the adjustment seat and connected to the display screen; the fill light device comprises a diffuser plate, a lamp holder and lamp beads; the diffuser plate is arranged on both sides of the test hole, the lamp holder is arranged on the outer side of the diffuser plate in parallel and spaced, and the lamp beads are installed on the lamp holder; the adjustment device comprises a driving end, a screw rod, a positioning rod and a threaded rod The sliding sleeve; the driving end is connected to the screw rod for driving the screw rod to rotate, the threaded sliding sleeve is threadedly connected to the screw rod, and a positioning sleeve is arranged on its outer side, the positioning rod is arranged on the outer side of the screw rod and is matched and sleeved in the positioning sleeve; the adjusting seat is fixed on the threaded sliding sleeve, so that the camera can translate along the center line direction of the carrier below the carrier, positioning sleeves are arranged on both sides of the threaded sliding sleeve, the positioning rods are arranged on both sides of the screw rod, and the two positioning sleeves are correspondingly sleeved in the positioning rods, the adjusting seat includes a vertical plate and a horizontal plate, the upper end of the vertical plate is fixed or integrally connected to the outer side of the positioning sleeve, the horizontal plate is provided with a slot, a sleeve plate is sleeved in the slot, the sleeve plate can slide in the slot, and can be locked by the top screw on the side of the slot, and the camera is installed on the sleeve plate.

2. The water-sensitive paper droplet rapid detection device according to claim 1, characterized in that: The driving end is a stepper motor, and the rotating shaft of the stepper motor is connected to the screw rod through a coupling.

3. The water-sensitive paper droplet rapid detection device according to claim 2 is characterized in that: The display screen is a touch-type control display screen, and the display screen is connected to the camera and the stepping motor via a circuit board.

4. The water-sensitive paper droplet rapid detection device according to claim 1, characterized in that: The driving end is a hand wheel.

5. The water-sensitive paper droplet rapid detection device according to claim 1, characterized in that: The test hole is a square structure, a baffle is arranged at the bottom of the test hole, and the slide is fixed on the baffle.

6. The water-sensitive paper droplet rapid detection device according to claim 1, characterized in that: The lamp beads are installed at intervals in the middle of the lamp holder along the horizontal direction and are perpendicular to the light diffusion plate.

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