TW200817656A - Image monitoring and stock detection integrated system applied in liquid storage tank and method thereof - Google Patents

Abstract

The present invention relates to an image monitoring and stock detection integrated system applied in a liquid storage tank, which comprises a light reflecting plate floating on the surface of a liquid stored in the liquid storage tank and a digital imaging device for capturing the image picture information including the image graphic of the light reflecting plate, where the distance between the light reflecting plate and the top of the liquid storage tank can be calculated by the relationship between the number of pixels of the light reflecting plate in the image picture information and the actual length of the light reflecting plate. The present invention also provides an image monitoring and stock detection method applied in a liquid storage tank.

Description

200817656 IX. Description of the Invention: [Technical Field] The present invention relates to an image monitoring and stock detection co-construction system applied to a liquid storage tank, which uses the pixel value of an image to calculate the height of the storage liquid, and The physical state of the stored liquid can be monitored simultaneously. [Prior Art] In the prior art, in a height measuring device for a liquid (water, stone/yield or chemical agent) or a powder (plastic powder, flour or powder) used in a storage tank or container, such as The Republic of China Invention Patent Notice No. 2〇〇97 No. = = the tin furnace liquid level detecting device of the Republic of China Invention Patent Bulletin No. 333335, which is set in a storage tank or container for measurement The storage height of the storage. In addition, there are ways to calculate the reflected wave by ultrasonic ranging: the way to know the height of the reserve, but the transmitter and receiver of the ultrasonic still need to be placed in the storage tank. Therefore, the conventional reserve height measuring device belongs to a contact type measuring device. _ _, Huaminguo invention patent publication No. 854717 measuring storage degree = device is the previous invention of the invention, using two low-power visible light = full laser light source with CCD camera, set outside the storage tank Do not measure = the storage height of the storage inside the storage tank, and can simultaneously measure the shape of t-bay in the tank. However, the CCD cameras and laser light sources are required to be stored in the center of the top of the towel, and the floating plate is also fixed in the center of the liquid surface for storing the liquid, thereby increasing the difficulty of system setting. The use of two parallel laser beams can also perform non-contact distance detection and achieve accurate measurement purposes. However, because parallel laser beam coating and calibration are limited by its method, and its floating plate liquid needs to be fixed. In the center of Chu Yuzhen, it is still not convenient to use and can be changed at any time in 200817656. Therefore, there is a need for a more sophisticated, ^-type measurement system. The invention is directed to providing a co-construction system for monitoring and stock detection, and a video system for a liquid storage tank, which will be digital camera or digital phase. The conversion value of the value and the distance calculates the distance between the stored liquid and the image state of the information behind the image. In order to achieve the above purpose, the present invention will be responsible for the image monitoring and stock detection co-construction system = liquid level of the liquid stored in the liquid storage tank of the body storage tank; · ~· J extraction - 2 The image image of the image pattern of the reflector is used to calculate the image pattern of the reflector and the pixel value, and calculate the pixel value of the image pattern and the image information of the image. The pixel value ratio of the pixel value of the maximum photographic pixel value is proportional to the ratio of the actual length of the reflector and the length of the actual maximum photographic length of the video frame information. The maximum photographic length of the actual image picture information is described in the tenth, and the distance between the reflector and the top of the liquid storage tank is calculated according to the maximum photographic length and the triangle theorem. In order to achieve the above object, the present invention provides a method for image monitoring and stock detection applied to a liquid storage tank, comprising: capturing image information of an image of a target object by using a digital image device; a ratio of a pixel value of the image pattern to a pixel value of a pixel value of the maximum photographic pixel value of the image frame information; and the use of the pixel value ratio and the average length of the target object and the actual maximum photographic length of the image facet information 200817656 The maximum ratio of the actual image frame information is calculated in proportion to the length ratio; and the distance between the target and the digital image device is calculated according to the maximum photographic length and the triangle theorem. The invention for achieving the above object is applied to a liquid storage tank for image monitoring and a summer debt measurement co-construction system, which does not need to use two parallel laser lights, and also floats (four) on the same-vertical axis, so that the present invention (four) The organization ^ early, the installation is more. And since the material on this side must take into account ^2', the position where it is located, and the degree of installation of the digital camera or digital camera, then in the fourth, the pure material of the present invention must do any high-two factors. There is no need for the distance of the optical origin, so the digital camera is not limited to any brand or model, as long as the measurement is carried out, the majority can be directly performed (4) and the image is observed. 1 Ming said the purpose or characteristics 'will be detailed according to the following figure 2 == after the hair r and the examples, just to say [implementation] price: then t = for - type of liquid storage Image monitoring and storage of the slot; in the 2 system (4) relationship and distance measurement "^夂_ pixel and distance linear ratio of the volume of the ancient sound in the liquid storage tank inside the storage liquid and the same day monitoring The physical state of the liquid in question: Included:: digital camera = f〇r - the new structure diagram of the example, including the digital camera 彡 y storage tank 200 and a reflector 300. Square, and erected by ^ (9) The glass 2 of the trough 200 on the top 201 of the storage isolates the digital camera 100 from the storage/body's avoiding contact of the storage liquid with the digital camera 100 directly 200817656 to form a non-contact distance measurement. By adjusting the 3 reinforced glass 211 to limit the distance between the liquid level of the stored liquid and the digital camera 100, the liquid level of the stored liquid can be prevented from being higher than the known dead zone of the digital camera. The top 201 further includes a dust cover 21 cover The digital camera 100 is configured to isolate the surroundings of the digital camera 100 and the storage tank 200. The dust cover 21 is provided with two projection lamps 221 and 222 to provide the interior of the storage tank 200. The reflector 300 is a circular floating plate, and further includes a buoyancy cotton 310 and a gravity hammer 320, wherein the buoyancy cotton 31 provides a buoyancy force to the reflector 300, so that the reflector 300 can float. The gravity clock 320 is provided to the liquid level of the storage tank 200, and the gravity clock 320 provides a gravity to the reflector 300 to stabilize the shaking of the reflector 300, and the buoyancy of the buoyancy cotton 310 is greater than the gravity. The gravity provided by the hammer 32 causes the reflector 300 to float out of the liquid level of the storage liquid, and the upper surface of the reflector 3 is preferably a monochromatic plane to facilitate the digital camera 2 Taking the pixel value and performing distance measurement, in the embodiment of the present invention, the reflector 300 is a surface having a yellow color system. When the reflector 3 is stored in the storage tank 200, the liquid color is stored. When not equal, the calculation The circular area of the surface of the reflector 3 can be easily calculated by the second 40. The digital camera 100 can observe the physical state of the liquid stored in the storage tank 200 or record the reaction process, and simultaneously The height of the storage liquid is measured. Since the reflector 300 will rise and fall with the liquid level of the storage liquid, the area of the image of the reflection plate 300 in the image information captured by the digital camera 100 also changes. The calculating unit 4 can calculate the height of the reflector 3 〇〇 200817656 at the time of the image pattern of the reflector 3 00. Since the reflector 300 is a circular floating plate, the digital camera 100 The setting direction and position are not limited. Referring to the second figure, a schematic diagram of pixel value and distance conversion of the image pattern of the reflector 300, wherein the reflector 300 is further a circular plate, and the pixel value of the diameter of the reflector 300 can be calculated to obtain a reflection. The height of the plate 300 from the top 201 of the storage tank 200. The invention relates to the image monitoring and stock detection co-construction system of the liquid storage tank. The schematic diagram of the system includes the following parameters: Back OP: optical origin of the digital camera;

Pi, Pj: different positions of the reflector 300; &, ~: the distance of the reflector 300 from the surface of the digital camera 100, Pi: Pj; optical origin OP and the digital camera 100 The distance of the surface; factory: the radius of the reflector 300;: the maximum angle that the digital camera can photograph;

• The reflector 300 is at the position Pi, ρ, and the pixel value of the image pattern diameter; 1 p' W is (3⁄4), /) (3⁄4): the maximum camera that can be photographed by the digital camera 1 <Length; and ~ image of the face information, the heart: the maximum camera pixel value of the digital camera 100. Since the image of the image captured by the digital camera 1G() is linearly proportional to the horizontal distance of the object to be scanned, the pixel value can be connected to represent the horizontal distance of the reflector 300. According to the linear proportional relationship of the root, the ratio of the horizontal distance (4) of the reflector to the maximum length of the 200818656 shadow is (3⁄4), that is, the pixel value of the reflector 300 (K/2Z>), the (7^) and the dare photography. The ratio of the pixel value (in J, %) is the same, refer to the following relationship: D(hf) = ND(ht) NM) x2r D(hj) = ND{hj) ^r(hj) x2r and regardless of The length of the photographic distance of the digital camera 100 is equal, and the size of the image of the image captured by the digital camera 100 is equal, that is, the pixel values of each scanning line are equal, which is (4), so the following relationship can be obtained. :

Nd (3⁄4.) = Nd {hj) = Ns (max) D(hi) = ^^x2r Object 2r ϋ(^) = ^^χ2 J Κ(^) x2r McCaw, the angle theorem and the above relationship The result can be expressed as the following relationship: 1 ~=^ixrxA. ▲ 斤, Co, 4, heart two parameter values can be calculated by a calculation model to determine the size of the two parameters C 〇 i4, / z0. Therefore, the value of \h can be obtained after counting and Kb). 200817656 ^The second picture of the Zheng test is a system architecture diagram of the calculation model of the calculated and two parameter values, including two sets of vertical scales 4n, 412 and two sets of horizontal scales 421, 422 'where the horizontal scales 42 422 is a vertical distance a ^ ★ from the surface of the digital camera 1GG, and the vertical distances can be easily measured by the vertical scales 411, 412, and the digital camera 100 is at the horizontal scale 42 The maximum horizontal photographic distance of 422 can be easily measured by the horizontal scales and expressed as I.

Dm2. From the triangle theorem, the value of h〇+km” h〇+hm2 can be obtained, such as the following relationship = 2Dfnl c〇tes 2 cot屺, 412 and the values of the horizontal scales 421, 422, so it can be seen, because The vertical scales 4li yield hm], hm, DmI, Dm2 and two parameter values, such as the following relationship:

Cot meaning=2

Refer to Figure 4A to Figure 4D for the child's preparation. The horizontal angle of the digital camera 100 is called L intention. The #reflector is the circular camera 100 is the storage liquid heart of the storage tank. Regardless of the angle of the digital camera, the angle of the water is not affected, and the image of the reflector is not affected by the image of the reflector 3 200811 200817656. Pixel calculation. When the invention is applied to the image monitoring and stock detection co-construction system of the liquid storage tank, the angle adjustment device is not needed. Therefore, it is more convenient to establish the system of the invention, and the system of the invention has more practical value. . The fifth picture of the Cang test is a flow chart for calculating the area of the image pattern. In the process 501, the area calculation algorithm 500 reads the image information of the image including the image of the reflector 3 by the digital camera 100; At 502 hrs, all the image information of the image is subjected to color difference filtering to directly exclude all images that are not yellow color. In the process 503, the upper and lower threshold values of chromaticity are set to make the chromaticity of the same color system. Comparing; at process 504, it is to check whether the chrominance of the read pixel is within a critical value, if not, proceed to flow 505, and if so, proceed to flow 506; at process 505, 'continue to determine the next read. Take the value and go to the process 5〇4; in the process 506, start the pixel counting function to count the pixel value; in the process 5〇7 day, k check whether the full face confirmation has been completed, if not, proceed to process 5 〇8 'If yes, proceed to flow 509; at process 508, continue to determine the next reading value and revert to flow 5〇4; and at flow 5〇9, convert the calculated total pixel value to image Graphics Product. § When the reflector 300 is at a distance from the top of the storage slot 2〇1, since all the read image information is first processed by chromatic aberration, when the compared pixels are at the set threshold Within the value, the pixel can be regarded as the pixel of the image pattern of the reflector 300, and the sum of the pixel values of all the yellow color systems at this time represents the product of the image pattern of the reflector, ^;卩 can be regarded as the pixel value of the diameter of the reflector. Since the reflector 300 can be located at any position below the same distance (6), the following is checked under the same distance J (% distance), and the position of the reflector 300 12 200817656 is on the system of the present invention. Calculate the impact of the results. When the diameter of the reflecting plate 300 is 11.1 cm and \ is 155 cm, the statistics of the following table can be obtained. ΣΝΥ 9031 9041 9054 9049 9023 Nr(hi) 107.23 107.29 107.37 107.34 107 18 When the diameter of the reflecting plate 300 is 11.1 For the cents and \time, the statistics of the following table are available. · 197 cm ΣΝΥ 5616 5610 5621 5618 5608 Nr(hi) 84.56 84.52 84.60 84.58 84.50 The error amount is defined as: 士Σ雄)-雄) ^ η=Λ According to the definition of the error amount, it can be confirmed that the position of the reflecting plate 300 under the same distance (/2/) has little influence on the calculation result of the system of the present invention, and the error is acceptable. /曰" Therefore, when the reflector 300 is in the & position, the area of the image pattern representing the reflector 300 is represented by ΣΛ^, and the diameter of the image pattern of the reflector is determined as follows. Show: Since the rabbit Mingxian first counts the sum of the pixel values of the image pattern (ΣΛ/r), and then uses the relationship between the area and the radius. ^々勹 Calculate the pixel value of the diameter of the plate 3〇2 (Wushan, so use the calculation method of taking = mean to avoid the uncertainty of the measurement results. And know Κ; 2Ζ>) After the value, since ^^^, knowing that the two parameter values 13 200817656 are known values calculated in advance, the value of \ can be calculated according to the following relationship: h

Kih) xrxcot0s^ho The temperature of the liquid stored in the body is the distance from the liquid level of the storage liquid to the tank of the storage tank. Therefore, refer to the first figure, where the reflection ^ 300 floats on the liquid surface. The position of the surface, the corpus △ is the upper surface of the bottom, and the household is the position of the upper surface of the reflector 300 when it is placed at the bottom 202. Therefore, the distance between the upper surface of the reflector 3 and the surface of the digital camera 1 is when the reflector 300 is located, and the center is the surface of the reflector 3 when the reflector 300 is located. The distance from the surface of the digital camera, and //& is the structural thickness of the reflector 3, so the height of the storage liquid of the storage tank 200 can be expressed as follows:

Hga =hg -ha +Hb 八max) I )xrxcot05 ^Hb From the above relationship, it can be seen that 'the calculation of the height of the storage liquid does not require the parameter value of the heart' and thus can represent the system of the present invention. Restricted to the position of the optical origin OP, and regardless of the mounting height of the digital camera 100, the measurement results are not affected, thus making the installation and mounting of the system of the present invention very easy. The system of the present invention actually uses the Sony P10 as the digital camera 100 for actual measurement. The system architecture diagram shown in the third figure establishes the value (10) (four) .731 ' and the resolution of the digital camera 100 is 2048*1536, so each The maximum photographic pixel value % of one scan line is 2048, and the half-cm of the reflector 300, so the results are as follows. · 200817656 Error amount% 107.23 84.50 154.97 _ 196.66 0.019 0.173 ? . The internal storage;; the liquid level of any position i 疋 measured 2 of the results obtained by the error is still not f small. In the current measurement method of the automatic processing line, almost all of the self-made machine tools use the incremental optical ruler to move the head to 2. However: in the use of the optical ruler must drive the sense of holding, and lead to the earthquake: optical two test 'and the movement of the sensor head is easy to produce friction; two = the error caused by the measurement and the zero correction during the measurement (4) = step to the image monitoring of the liquid storage tank of the present invention; = 2 system applied to the distance measurement method of the automated processing system 'U to improve the above problems. Measurement =:==?,! The distance from the automated processing system. In this embodiment, a standard area reference plate 6〇1 of a fixed area is added on a processing=0 side to achieve the function of the reflector, and the processing device 6〇3 is attached to the working platform 6〇2. Move horizontally to perform surface processing of the object to be processed fixed by the fixed clip. In this embodiment, the digital camera 100 is also mounted on one side of the standard plane reference board 601, and the size of the image pattern formed by the standard area reference board 6〇1 in the image plane of the digital camera 1GG is used. To represent the distance between the digital camera 100 and the standard area reference plate 6〇1. Since both the start point (A) and the end point (B) of the processing range of the processing apparatus 603 are directly preset, and when the processing apparatus 6〇3 is located above A and B, the image patterns thereof can be expressed as 2 horses and respectively. 15 200817656's maximum Fan 22: Standard Area Reference Board 601 can be based on the distance resolution to be measured (the most measured, the standard area of the same production t) is measured as a rectangle with the highest value of _, and if The standard area reference 601 is used as the distance. ^The average value and the difference of the image area on each H sweep scale. If it is, the measurement misdetection line caused by vibration can be avoided = seven 3 = product reference Ϊ 601 is rectangular Scan and find the ^^ scan line, so you can get - the relationship is as follows, and enter the heart area of the test board 601 moving distance:

K

K can be achieved with a 2 cm pixel change with a movement of 2 cm (U mm (" resolution, digital camera or digital camera with unit horizontal scanning pixels _ average month $ to More than 2000 pixels, so the measurement resolution will reach 忉 ((4) or more resolution. Therefore, applying the line of the present invention to each mobile design and manufacturing can also provide an accurate and can be used according to requirements. The distance measurement system of Sijia I makes the system of the present invention more flexible in terms of application and application. In summary, the image monitoring and storage detection co-construction system of the present invention is applied to a liquid storage tank. A non-contact distance measuring system can avoid the public safety hazard caused by the contact of the worker with the storage liquid during operation, and the system of the invention does not need to use two parallel laser lights, and does not need to fix the floating plate On the same vertical axis, the mechanism of the measuring system is simpler and easier to install. And because it is not necessary to consider the position of the optical origin of the digital camera, it does not have to consider the height of the top of the trough. Therefore, during the measurement process, 16 200817656 There is no need to make any height correction, and because of the helmet, the number (four) is the seam, the distance of the eyepiece, so

Ns(maX) ' is used directly in the system of the present invention. And the effect of the camera is used for various kinds of automatic weighting, as a case of precision observation that can be processed by the image picture 'and ^ after the description of the preferred embodiment of the present invention, the person can understand the difference' Various changes and modifications can be made without departing from the following (4) patent g = technology, and the invention is not limited to the embodiment of the embodiment.曰 所 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 2008 The fourth scan of the 4':================================================================================================== Example system architecture diagram; and brother seven - is the scan line diagram of the standard area reference board. Representative symbols of the main parts: 100... Digital camera 200... Storage tank 201... Storage tank top 202... Storage tank bottom 210... Dust cover 211... Reinforced glass 221, 222... Projection lamp 300... Reflector 310... Buoyancy cotton 320... Gravity Hammer 200817656 411, 412... vertical scale 421, 422... horizontal scale 500... area calculation algorithm 5 01~5 09—flow 601-—standard area reference plate 602... work platform 603—processing equipment 604—to-be-processed object 605 — fixed loss 19

Claims (1)

200817656 X. Patent application scope: 1. A video surveillance and stock detection co-construction system applied to a liquid storage tank, comprising: a reflector, a liquid level floating on a liquid stored in the liquid storage tank; and a digital position The image device is configured to capture image information of the image pattern including the reflector; wherein the pixel image information of the reflector is calculated by using the image information, and the pixel value of the image pattern and the image are calculated The pixel value ratio of the pixel value of the maximum photographic pixel value of the facet information is further calculated by using the ratio of the pixel value ratio to the length ratio of the actual length of the reflector and the actual maximum photographic length of the image mask information. The maximum photographic length of the actual image kneading information, and the distance between the reflecting plate and the top of the liquid storage tank according to the maximum photographic length and the triangle theorem. 2. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to the first aspect of the patent application, wherein the digital image device can be a digital camera or a digital camera. 3. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to claim 1, wherein the upper surface of the reflector is a flat surface having a monochromatic system. 4. The image monitoring and stock detection co-construction system applied to the liquid storage tank according to the first application of the patent scope, wherein the reflector is a round flat 20 200817656 board 0 5. As claimed in the first item, Item 3 or 4 is an image monitoring and stock detection co-construction system applied to a liquid storage tank, wherein the reflector further comprises a floating body for providing buoyancy of the reflector. 6. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to the first, third or fourth aspect of the patent application, wherein the reflector further comprises a gravity hammer for stabilizing the reflector . 7. The image monitoring and stock detection co-construction system for use in a liquid storage tank according to claim 1, wherein the liquid storage tank further comprises a projection lamp for increasing the brightness of the interior of the liquid storage tank. 8. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to the first aspect of the patent application, wherein the digital image device is disposed at the top of the liquid storage tank and isolates the digit by a transparent partition plate. The image device and the liquid stored in the liquid storage tank. 9. An image monitoring and stock detection method applied to a liquid storage tank, comprising: capturing image information of an image pattern containing a target object by a digital image device; calculating pixel values of the image pattern and the image 昼The ratio of the pixel value of the pixel value of the maximum photographic pixel value of the surface information; using the ratio of the pixel value ratio to the length ratio of the actual length of the target object to the actual maximum photographic length of the image plane information is proportional to the relationship of 21 200817656, a maximum photographic length of the actual video picture information; and calculating a distance between the target object and the digital image device according to the maximum photographic length and a triangle theorem. 10. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to claim 9 wherein the digital image device can be a digital camera or a digital camera. 11. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to claim 9 wherein the upper surface of the object is a flat surface having a monochromatic system. 12. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to the scope of claim 9 wherein the target system is a circular plate 0. 13. For the scope of claim 9 and 11, Or the image monitoring and stock detection co-construction system applied to the liquid storage tank according to Item 12, wherein the target object further comprises a floating body for providing the buoyancy of the target object. 14. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to claim 9, claim 11, or claim 12, wherein the target further comprises a gravity hammer for stabilizing the target object . 15. The image monitoring and stock detection co-construction system applied to a liquid storage tank according to claim 9, wherein the liquid storage tank further includes 22, and a projection lamp for increasing the brightness of the liquid storage tank. . 16. The image monitoring and stock detection co-configuration system for a liquid storage tank according to claim 9, wherein the digital image device is disposed at the top of the liquid storage tank and isolates the digit by a transparent spacer. The image device and the liquid stored in the liquid storage tank. twenty three