CN111947733A - Intelligent digital water level scale and use method thereof - Google Patents
Intelligent digital water level scale and use method thereof Download PDFInfo
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- CN111947733A CN111947733A CN202010809874.7A CN202010809874A CN111947733A CN 111947733 A CN111947733 A CN 111947733A CN 202010809874 A CN202010809874 A CN 202010809874A CN 111947733 A CN111947733 A CN 111947733A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/04—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by dip members, e.g. dip-sticks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/80—Arrangements for signal processing
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Abstract
The invention discloses an intelligent digital water level scale and a use method thereof. Millimeter-level reading bars are arranged on the left part and the right part of the digital reading unit, a row of Arabic numerals is arranged on the middle upper part of the digital reading unit, four rows and four columns of digital blocks are arranged on the middle lower part of the digital reading unit, and centimeter spacing bars are arranged between the left part and the middle part and between the middle part and the right part of the digital reading unit. The digital water level scale is vertically erected in water, a camera and lighting equipment on a measuring frame on the bank face shoot towards the digital water level scale, and a computer obtains a water level value according to an image of the position of the digital water level scale submerged by a water line and obtains the change of the water regime at the digital water level scale; the water level value displayed by the digital water level scale can also be manually and visually observed.
Description
Technical Field
The invention relates to the field of water conservancy test instruments, in particular to an intelligent digital water level gauge.
Background
The water levels of water bodies such as wetlands, rivers, reservoirs and the like are main judgment indexes of operation management, and accurate real-time monitoring is a key for realizing fine scientific management of the water bodies. At present, a water level scale or a water level sensor is usually adopted for measurement, the water level scale can only read and test the water level on the spot manually, and the water level sensor only senses and tests the water level. Therefore, the water level scale can not directly input water level data into a computer for processing, and the water level sensor is difficult to read water level on site and sense water conditions.
Disclosure of Invention
Because of the inconvenience, the invention provides the intelligent digital water level gauge, which not only can visually measure the water level in a manual field, but also can shoot images at the water level line of the digital water level gauge through a camera and obtain the real-time water level through remote processing of a computer, can obtain the change of the field water regime from the shot images, provides richer information for the operation management of wetlands, rivers, reservoirs and the like, and is an ideal and practical water level measuring instrument.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an intelligent digital water level scale is characterized in that the intelligent digital water level scale is provided with a vertical scale rod, a seal layer is arranged on the rod surface of the scale rod, and a transparent scale surface is arranged on the seal layer; the edges of two sides of the ruler surface are provided with side strips, a row of mutually connected digital reading units with the same structure are arranged between the two side strips in the ruler surface, and the top end and the bottom end of each digital reading unit are provided with boundary lines; digital reading unit's left part and right part all have millimeter level water level reading strip the upper portion at digital reading unit middle part has one row to show the Arabic digit of decimetre level water level value the lower part at digital reading unit middle part has four rows of four to show with the recognizable digital system of computer to show the digital piece of Arabic digit all there is centimetre spacer bar between digital reading unit's left part and middle part, middle part and the right part, apart from on the centimetre spacer bar 5 centimetre department has five centimetre suggestion sections in digital reading unit bottom.
Preferably, the height of the digital reading unit is 10 cm, the cm spacing bar is formed by alternating black and white cm sections, each color cm section is 5 sections, the height of the cm section is 1 cm, and the 5 th cm section of the cm spacing bar from bottom to top is the five cm prompt section.
Preferably, the Arabic numerals are four digits, and small dots are arranged between the ones digits and the tens digits of the Arabic numerals; the Arabic numerals and the small dots are black, and the ground color is white.
Preferably, the four rows and four columns of code blocks display the arabic numerals in a binary system, wherein the first row of four code blocks from bottom to top display a digit which is the ones digit of the arabic numerals, the second row of four code blocks display a digit which is the tens digit of the arabic numerals, the third row of four code blocks display a digit which is the hundreds digit of the arabic numerals, and the fourth row of four code blocks display a digit which is the thousands digit of the arabic numerals; the digital block displaying the Arabic numerals is white, and the digital block not displaying the Arabic numerals is black.
Further preferably, all black portions are coated with a light absorbing layer and all white portions are coated with a light reflecting layer.
Preferably, in the digital reading unit area, vertical concave strips are arranged on the bottom surface of the ruler surface at the prompt section of five centimeters, the cross sections of the vertical concave strips are all arc-shaped, and arc pits are arranged on the bottom surfaces of other ruler surfaces except the prompt section of five centimeters.
Preferably, 50 horizontal concave strips are arranged on the bottom surface of the ruler surface at the millimeter-scale water level reading strip, the cross sections of the horizontal concave strips are isosceles triangles, the internal angle of each horizontal concave strip is greater than 60 degrees, the horizontal projection of the upper side length or the lower side length of the internal angle of each horizontal concave strip on the surface of the ruler surface is 1 millimeter wide, vertical dents are arranged on the whole upper side length of each horizontal concave strip, and the cross sections of the vertical dents are circular arcs; and a light reflecting layer is coated on the whole upper side length of each horizontal concave strip, and a light absorbing layer is coated on the whole lower side length of each horizontal concave strip.
The use method of the intelligent digital water level scale is characterized by comprising the following steps:
(1) vertically arranging a digital water level scale in a water body to be measured, arranging a measuring frame on the shore of the water body, arranging a camera, lighting equipment and a control cabinet on the measuring frame, and aligning the camera and the lighting equipment to the digital water level scale;
(2) and (3) water level testing:
when the water level is manually observed, the Arabic numerals of the digital reading unit of the digital water level scale at the water surface line are observed, and the decimeter value of the water level displayed by the Arabic numerals is read out, or the meter value of the water level displayed by 1 position after a decimal point is reserved is read out; visually observing the position of the water level line on the centimeter spacing bars, counting the centimeter values of the centimeter spacing bars to display the water level according to the prompt of the five centimeter prompt sections; the position of the water surface line on the millimeter-level water level reading bar is visually observed, the millimeter value of the water level displayed by the millimeter-level water level reading bar is counted, the read decimeter value is combined, or the meter value of 1 bit after the decimal point is reserved, the counted centimeter value and the counted millimeter value are read, so that the water level value displayed by the water surface line position on the digital water level scale is obtained;
when the camera tests the water level, the control cabinet controls the lighting equipment to illuminate the digital water level scale, the camera is controlled to track and aim at the digital water level scale on the water surface to shoot, the control cabinet transmits shot image signals to the computer to be processed, analyzed and stored, and the water level values of the wetland, the river, the reservoir and the like are obtained in real time.
When the camera shoots the digital water level scale to test the water level, the control cabinet also gives consideration to the condition that the camera shoots the water surface at the digital water level scale, and the control cabinet transmits the image of the shot water surface change to the computer for processing, analyzing and storing, so as to obtain the water regime information in real time.
Compared with the prior art, the invention has the beneficial effects that:
1. the intelligent digital water level gauge not only can manually and on-site measure the water level, but also can shoot the image of the digital water level gauge on the water surface line by adopting the camera, obtain the water level by computer processing, and also can obtain the change of the on-site water regime from the shot image, thereby being an ideal and practical water level and water resource testing instrument.
2. According to the intelligent digital water level scale, the flat and smooth scale surface which is not easy to be stained with accumulated dirt is adopted, so that the condition that the dirt or water is stained to misread the water level of the scale is avoided; the ruler surface material with good light transmission and wear resistance is adopted, so that the ruler is clear and durable; binary number is adopted, the number of the digital codes is reduced, and the display area of the digital codes is as large as possible; the square digital block and the frame are adopted, so that the digital code is easy to be read by a computer; a centimeter spacing bar is used as a centimeter scale, and a millimeter-level water level reading bar is separated for Arabic numbers and code blocks; a prompt section of five centimeters is adopted, so that the reading speed and accuracy are improved; the two sides of the ruler surface are provided with millimeter-level water level reading strips, the distance between the two millimeter-level water level reading strips is increased, the average value is taken during reading, and the error of water level fluctuation on reading is overcome; the arc pit structure with large reflectivity is arranged in the ruler surface, so that an image projected to the ruler surface is clear; a triangular horizontal concave strip structure sensitive to water reflection is adopted in the ruler, so that the image definition and resolution are improved; the coating with large color difference between light reflection and light absorption is adopted in the ruler surface, so that the shot image is real and reliable. The device has the comprehensive technical effects of man-machine dual-purpose, high precision, good resolution, large measuring range, multiple functions, simple equipment, convenience in use, real-time data measurement and the like.
3. In the preferred embodiment of the invention, the black and white with strong visual effect contrast are adopted to distinguish the centimeter spacing strips, Arabic numbers, number blocks and the like, and the light reflecting and light absorbing coatings are matched, so that the manual observation is easier, the identification degree of the shot image is higher, and the resolution is further improved.
Drawings
Fig. 1 is a schematic front view of a digital reading unit according to the present invention.
Fig. 2 is a schematic side sectional view of the digital reading unit of the present invention.
FIG. 3 is a schematic side sectional view of a millimeter-scale water level reading bar according to the present invention.
Fig. 4 is a schematic view of the arrangement of the present invention.
Reference numbers in the figures: 1 digital water level scale, 2 ruler rods, 3 sealing layers, 4 ruler surfaces, 5 digital reading units, 6 boundary lines, 7 side strips, 8 Arabic numerals, 9 small dots, 10 digital blocks, 11 frames, 12 cm spacing strips, 13 circular arc pits, 14 five cm prompt sections, 15 mm water level reading strips, 16 upper side length, 17 lower side length, 18 water surface lines, 19 shore edges, 20 measuring frames, 21 camera, 22 lighting equipment and 23 control cabinet.
Detailed Description
Referring to fig. 1 to 4, the intelligent digital water level scale 1 in the present embodiment has the following structural form: the digital water level scale 1 is provided with a vertical scale rod 2, a seal layer 3 is arranged on the rod surface of the scale rod 2, a transparent scale surface 4 is arranged on the seal layer 3, and the surface of the scale surface 4 is flat and smooth. The edge of the two sides of the ruler surface 4 is provided with edge strips 7, a row of mutually connected digital reading units 5 are arranged in the ruler surface 4 between the two edge strips 7, the structures of the digital reading units 5 are the same, each digital reading unit 5 is 10 cm high, and the top end and the bottom end of each digital reading unit 5 are provided with a boundary line 6. Digital reading unit 5's left part and right part all have millimeter level water level reading strip 15 there is one row of arabic numeral 8 on the upper portion at digital reading unit 5 middle part there are four rows of four-column digital piece 10 in the lower part at digital reading unit 5 middle part all have centimetre spacer 12 between the left part and middle part, middle part and the right part of digital reading unit 5. The Arabic numerals 8 are decimeter-level water level values of four digits, and small round dots 9 are arranged at the lower parts between the ones and the tens of the Arabic numerals 8. The Arabic numerals 8 and the small dots 9 are black, and the ground color is white. The digital code displayed by the four digital code blocks 10 at the bottom row of the digital reading unit 5 is the single digit of the arabic number 8, the digital code displayed by the four digital code blocks 10 at the second row from bottom to top is the ten digit of the arabic number 8, the digital code displayed by the four digital code blocks 10 at the third row is the hundred digit of the arabic number 8, and the digital code displayed by the four digital code blocks 10 at the fourth row is the thousand digit of the arabic number 8. The number block 10 displaying the arabic numeral 8 is white, and the number block 10 not displaying the arabic numeral 8 is black. Each digital block 10 is square, each digital block 10 has a frame 11, and the frames 11 are black. The centimeter spacing bar 12 is alternated from bottom to top by white centimeter segments and black centimeter segments, the white centimeter segments and the black centimeter segments are respectively provided with five segments, the white centimeter segments and the black centimeter segments are both 1 centimeter high, and the white centimeter segment on the centimeter spacing bar 12 at a position 5 centimeters away from the bottom end of the digital reading unit 5 is a five-centimeter prompt segment 14. The digital water level scale 1 is vertically arranged in water of wetlands, rivers, reservoirs and the like, and the upper part of the digital water level scale 1 is higher than the water surface. On the measuring frame 20 on the shore 19 there are a camera 21 and a lighting device 22, which camera 21 and lighting device 22 are directed towards the digital water level gauge 1. When the water level is tested, the lighting device 22 lights the digital water level scale 1, the camera 21 aims at the digital water level scale 1 to shoot, and according to the image of the position of the digital water level scale 1 submerged by the water surface line 18, the computer obtains the water level value through image processing. The camera 21 also shoots images of the water surface of the wetland, the river, the reservoir and the like at the digital water level scale 1, and information of water regime change is obtained after the images are analyzed and processed by a computer; in addition, the water level value displayed by the digital water level scale 1 can be visually observed on site manually.
Except that vertical concave strips are arranged on the bottom surface of the ruler surface 4 at the prompting section 14 of five centimeters of the digital reading unit 5, regular arc pits 13 are arranged on the other bottom surfaces in the middle of the ruler surface 4. The cross sections of the vertical concave strips are arc-shaped, light absorbing layers are coated on black parts of the Arabic numerals 8, the small round points 9, the digital blocks 10 which do not display the digital codes, the frames 11 of the digital blocks 10 and the centimeter spacing strips 12, and light reflecting layers are coated on the ground colors of the Arabic numerals 8 and the small round points 9, the white parts of the digital blocks 10 which display the digital codes, the centimeter spacing strips 12 and the five centimeter prompting sections 14.
The ruler face 4 bottom surface row of 15 departments of digital reading unit 5 millimeter level water level reading strip has 50 horizontal concave strips, and the cross section of these horizontal concave strips is isosceles triangle, every the interior angle of horizontal concave strip is greater than 60, every the last side length 16 or the lower side length 17 of horizontal concave strip interior angle are in ruler face 4 horizontal projection on the surface is 1 millimeter wide, every the horizontal concave strip is whole to be arranged on 16 the length of side and is had vertical indenture, and the cross section of these vertical indenture is convex. A light reflecting layer is coated on the whole upper side length 16 of each horizontal concave strip, and a light absorbing layer is coated on the whole lower side length 17 of each horizontal concave strip.
The invention relates to a using method of an intelligent digital water level scale, which comprises the following steps:
(1) vertical digital water level gauges 1 are arranged in water of wetlands, rivers, reservoirs and the like, measuring frames 20 are arranged on the bank 19 of the wetlands, the rivers, the reservoirs and the like, cameras 21, lighting equipment 22 and control cabinets 23 are arranged on the measuring frames 20, and the cameras 21 and the lighting equipment 22 are aligned with the digital water level gauges 1.
(2) When the water level is manually observed, the Arabic numerals 8 of the digital reading unit 5 at the water surface line 18 of the digital water level scale 1 are visually observed, and the decimeter value of the water level displayed by the Arabic numerals 8 can be read out, or the decimeter value of the water level 1 after the decimal point is reserved can be read out; visually observing the position of the water level line 18 on the centimeter spacing bars 12, and counting the centimeter values of the water level displayed by the centimeter spacing bars 12 according to the prompt of the five-centimeter prompt section 14; and (3) visually observing the position of the water surface line 18 on the millimeter-level water level reading strip 15, counting the millimeter value of the water level displayed by the millimeter-level water level reading strip 15, combining the read decimeter value or reading the meter value, the counted centimeter value and the counted millimeter value of the 1 bit after the decimal point is reserved, and then obtaining the water level value displayed by the position of the water surface line 18 on the digital water level scale 1. If the water line 18 is located at the Arabic numeral 8, so that the reading is inconvenient, the Arabic numeral 8 of another digital reading unit 5 above the water line 18 can be read as a reference.
(3) When the camera 21 tests the water level, the control cabinet 23 controls the lighting device 22 to light the digital water level scale 1 by using the controller, controls the camera 21 to track and aim at the digital water level scale 1 on the water surface for shooting, and transmits the shot image signal to the computer for processing, analyzing and storing by the control cabinet 23. Due to the structure of the digital water level scale, the scale image above the water surface line shot by the camera is clear and distinguishable, and the scale image below the water surface line is blurred. The computer carries out regulation requirements such as surface of water linear position, size, map width to the image of shooing and handles to search for with the gallery image of prestoring, discernment, analysis such as contrast, draw decimetre level value of water from the binary number code block, centimetre level interval strip and millimeter level reading strip image contrast draw centimetre level and millimeter level value of water, obtain the water level data of wetland, river and reservoir etc. in real time.
(4) The camera 21 is shooting digital water level scale 1 and testing the water level, the switch board 23 also gives consideration to the condition that the control camera 21 shoots the water surface at digital water level scale 1, including the image of water level, floater, wave, sleet, turbidity etc., the switch board 23 transmits the image of shooting water surface change to the computer for processing, analysis and storage, when supplying people direct observation, the computer can carry out image classification processing to water level, velocity of flow, rain, ice, drought, etc., and carry out contrastive analysis with the pre-stored image of the image gallery, water situation information of wetland, river, reservoir, etc. is obtained in real time.
Claims (10)
1. An intelligent digital water level gauge is characterized in that the intelligent digital water level gauge is provided with a vertical gauge rod (2), a sealing layer (3) is arranged on the rod surface of the gauge rod (2), and a transparent gauge surface (4) is arranged on the sealing layer (3); the edge of the two sides of the ruler surface (4) is provided with an edge strip (7), a row of mutually connected digital reading units (5) with the same structure are arranged between the two edge strips (7) in the ruler surface (4), and the top end and the bottom end of each digital reading unit (5) are provided with a boundary line (6); the left part and the right part of digital reading unit (5) all have millimeter level water level reading strip (15) the upper portion at digital reading unit (5) middle part has one row of arabic numerals (8) that show the level of decimetre level water level value the lower part at digital reading unit (5) middle part has four rows of four columns to show with the recognizable number system of computer the number piece (10) of arabic numerals all have centimetre spacer (12) between the left part and middle part, middle part and the right part of digital reading unit (5), apart from on centimetre spacer (12) five centimetre suggestion sections (14) are located to digital reading unit (5) bottom 5 centimetres.
2. The intelligent digital water level gauge according to claim 1, wherein the height of the digital reading unit (5) is 10 cm, the cm spacing bar (12) is composed of black and white cm segments, each color cm segment is 5 segments, the height of the cm segment is 1 cm, and the 5 th cm segment of the cm spacing bar (12) from bottom to top is the five cm prompt segment (14).
3. The intelligent digital water level gauge according to claim 1, wherein the Arabic numerals (8) are four digits, and small dots (9) are arranged between the ones digit and the tens digit of the Arabic numerals; the Arabic numerals and the small dots are black, and the ground color is white.
4. The intelligent digital water level gauge according to claim 1, wherein the four rows and four columns of code blocks display the arabic numerals in binary, wherein the first row and four columns of code blocks display the numerals of the arabic numerals in the ones digit, the second row and four columns of code blocks display the numerals of the arabic numerals in the tens digit, the third row and four columns of code blocks display the numerals of the hundreds digit, and the fourth row and four columns of code blocks display the numerals of the thousands digit; the digital block displaying the Arabic numerals is white, and the digital block not displaying the Arabic numerals is black.
5. The intelligent digital water level gauge according to any one of claims 2-4, wherein all black parts are coated with a light absorbing layer and all white parts are coated with a light reflecting layer.
6. The intelligent digital water level gauge according to claim 1, wherein in the area of the digital reading unit (5), vertical concave strips are arranged on the bottom surface of the gauge surface at the prompt section (14) of five centimeters, the cross section of each vertical concave strip is circular arc, and arc pits are arranged on the bottom surfaces of the gauge surfaces except the prompt section of five centimeters.
7. An intelligent digital water level gauge according to claim 1, wherein the digital blocks (10) are square shaped, each digital block having a black border coated with a light absorbing layer.
8. The intelligent digital water level gauge according to claim 1, wherein 50 horizontal concave strips are arranged on the bottom surface of the gauge surface at the millimeter-scale water level reading strip (15), the cross sections of the horizontal concave strips are isosceles triangles, the inner angle of each horizontal concave strip is greater than 60 degrees, the horizontal projection of the upper side length or the lower side length of the inner angle of each horizontal concave strip on the surface of the gauge surface is 1 millimeter wide, vertical dents are arranged on the whole upper side length of each horizontal concave strip, and the cross sections of the vertical dents are circular arcs; and a light reflecting layer is coated on the whole upper side length of each horizontal concave strip, and a light absorbing layer is coated on the whole lower side length of each horizontal concave strip.
9. The method for using the intelligent digital water level gauge according to claim 1, comprising the steps of:
(1) vertically arranging a digital water level scale in a water body to be measured, arranging a measuring frame on the shore of the water body, arranging a camera, lighting equipment and a control cabinet on the measuring frame, and aligning the camera and the lighting equipment to the digital water level scale;
(2) and (3) water level testing:
when the water level is manually observed, the Arabic numerals of the digital reading unit of the digital water level scale at the water surface line are observed, and the decimeter value of the water level displayed by the Arabic numerals is read out, or the meter value of the water level displayed by 1 position after a decimal point is reserved is read out; visually observing the position of the water level line on the centimeter spacing bars, counting the centimeter values of the centimeter spacing bars to display the water level according to the prompt of the five centimeter prompt sections; the position of the water surface line on the millimeter-level water level reading bar is visually observed, the millimeter value of the water level displayed by the millimeter-level water level reading bar is counted, the read decimeter value is combined, or the meter value of 1 bit after the decimal point is reserved, the counted centimeter value and the counted millimeter value are read, so that the water level value displayed by the water surface line position on the digital water level scale is obtained;
when the camera tests the water level, the control cabinet controls the lighting equipment to illuminate the digital water level scale, the camera is controlled to track and aim at the digital water level scale on the water surface to shoot, the control cabinet transmits shot image signals to the computer to be processed, analyzed and stored, and the water level values of the wetland, the river, the reservoir and the like are obtained in real time.
10. The use method of the intelligent digital water level gauge according to claim 9, wherein:
when the camera shoots the digital water level scale to test the water level, the control cabinet also gives consideration to the condition that the camera shoots the water surface at the digital water level scale, and the control cabinet transmits the image of the shot water surface change to the computer for processing, analyzing and storing, so as to obtain the water regime information in real time.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| RU222636U1 (en) * | 2023-04-25 | 2024-01-16 | Федеральное государственное бюджетное образовательное учреждение высшего образования Иркутский государственный университет путей сообщения (ФГБОУ ВО ИрГУПС) | Device for determining the water level in the drainage trays of a transport tunnel |
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| CN205352398U (en) * | 2016-01-22 | 2016-06-29 | 中国葛洲坝集团勘测设计有限公司 | Measuring rod |
| CN205669990U (en) * | 2016-04-20 | 2016-11-02 | 翟赛 | A kind of road and bridge construction measurement apparatus |
| CN207798070U (en) * | 2018-02-07 | 2018-08-31 | 大连圣博尔测绘仪器科技有限公司 | Scale reads formula leveling device certainly |
| CN108759973A (en) * | 2018-04-28 | 2018-11-06 | 南京昊控软件技术有限公司 | A kind of water level measurement method |
| CN109186706A (en) * | 2018-08-24 | 2019-01-11 | 南京昊控软件技术有限公司 | A method of for the early warning of Urban Storm Flood flooding area |
| CN208860435U (en) * | 2018-11-26 | 2019-05-14 | 河南安宏信息科技有限公司 | A kind of water gauge that Image Acquisition is easily distinguished |
| CN109754573A (en) * | 2019-01-21 | 2019-05-14 | 北京理工大学 | A kind of middle and small river flood forecasting pre-warning facility and its operation method |
| CN210375104U (en) * | 2019-10-28 | 2020-04-21 | 韩阳 | Hydrological leveling auxiliary device |
| CN211013141U (en) * | 2020-01-20 | 2020-07-14 | 山东嘉百利环境科技有限公司 | Square vertical stainless steel water gauge |
| CN111337100A (en) * | 2020-03-16 | 2020-06-26 | 石河子大学 | Water level measuring method and device based on strip-shaped water level scale |
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| RU222636U1 (en) * | 2023-04-25 | 2024-01-16 | Федеральное государственное бюджетное образовательное учреждение высшего образования Иркутский государственный университет путей сообщения (ФГБОУ ВО ИрГУПС) | Device for determining the water level in the drainage trays of a transport tunnel |
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