Online sand measuring instrument based on photoelectric method

Abstract

The utility model relates to the technical field of sand meters, in particular to an on-line sand meter based on a photoelectric method, which comprises a shell and an RTU (remote terminal unit) arranged in the shell. The turbidity sensor is connected with the RTU, and a glass lens is arranged at the bottom of the turbidity sensor; the cleaning mechanism is used for cleaning the glass lens; and the protective cover is arranged at the bottom of the shell. The glass lens darkens and tends to be stable due to the shielding of the protective cover, and the external light is blocked by the protective cover, so that the sand content measurement data obtained by the device is more accurate; the cleaning brush and the glass lens are located on the same horizontal plane, and when the motor drives the rotating rod to rotate, the cleaning brush can be completely attached to the glass lens for friction, so that sundries on the glass lens are scraped, and the glass lens is kept clean; after the ultrasonic transducer is started, surrounding water is driven to vibrate, and the glass lens located near the ultrasonic transducer is subjected to ultrasonic cleaning, so that the glass lens is cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of sand measuring instruments, and more specifically, particularly to an online sand measuring instrument based on a photoelectric method. Background Art

[0002] Traditional suspended sediment content is mainly sampled by a horizontal sampler, and the drying and weighing method is used to calculate the sediment content. The sampling, analysis and calculation of suspended sediment content are all manually operated, and it usually takes more than a week from the collection of suspended sediment water samples to the results of the sediment content. The safety and timeliness do not meet the development needs of hydrology in the new era. Online sand meters generally have direct measurement and self-recording functions, and can obtain the sediment content on site in real time. According to the measurement principle, there are mainly photoelectric sand meters, ultrasonic sand meters, isotope sand meters and vibration sand meters. Among them, the basic principle of photoelectric sand measurement is: measure the turbidity of the water body by optical method and convert it into the sediment content of the suspended sediment in the water body. However, the photoelectric sand meter encounters two problems in practical applications that affect the measurement accuracy. First, the sensor probe (i.e. turbidity sensor probe) is immersed in water for a long time, and algae and other microorganisms will be attached. Second, the photosensitivity of the sensor probe underwater is affected by day and night (there is an obvious difference in turbidity measured during the day and at night, which is unreasonable). According to the principle of photoelectric sand measurement, the above two points affect the accuracy of sand measurement. Utility Model Content

[0003] In order to overcome the above-mentioned shortcomings, the utility model aims to provide an online sand measuring instrument based on a photoelectric method, which can reduce the influence of day and night luminosity and clean the turbidity sensor.

[0004] An online sand measuring instrument based on a photoelectric method comprises a shell, and also comprises: an RTU telemetry terminal arranged in the shell; a turbidity sensor connected to the RTU telemetry terminal, wherein a glass lens is arranged at the bottom of the turbidity sensor; a cleaning mechanism for cleaning the glass lens; and a protective cover arranged at the bottom of the shell.

[0005] Furthermore, a plurality of water-permeable holes are provided on the side wall of the protective cover, and the protective cover shields the glass lens.

[0006] Furthermore, the cleaning mechanism comprises a motor, a rotating rod and a cleaning brush, wherein the motor is arranged at the bottom of the turbidity sensor, the rotating rod is fixedly connected to the output end of the motor, and the cleaning brush is fixedly connected to the side wall of the rotating rod.

[0007] Furthermore, the motor is arranged on the side of the glass lens, the rotating rod rotates with the output end of the motor as an axis, and the cleaning brush and the glass lens are in the same horizontal plane.

[0008] Furthermore, the cleaning mechanism includes a connecting line and an ultrasonic transducer, and the connecting line connects the RTU telemetry terminal and the ultrasonic transducer.

[0009] Furthermore, the ultrasonic transducer is arranged below the turbidity sensor.

[0010] Furthermore, the RTU telemetry terminal is also connected with: a temperature sensor for measuring water temperature; a lithium battery for power supply; and an antenna for sending and receiving signals.

[0011] Furthermore, the RTU telemetry terminal receives data and performs regulation through the APP.

[0012] Furthermore, the lithium battery is connected to one end of a charging cable, and the other end of the charging cable is connected to a solar energy conversion module.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] ① The glass lens becomes darker and tends to be stable due to the light blocked by the protective cover. The external light is blocked by the protective cover. There is no obvious change in the brightness inside the protective cover during the day and at night. The protective cover reduces the impact of day and night changes on turbidity measurement, making the sand content measurement data obtained by this device more accurate.

[0015] ② The cleaning brush and the glass lens are at the same horizontal plane. When the motor drives the rotating rod to rotate, the cleaning brush can completely fit the glass lens for friction, thereby scraping off the debris on the glass lens and keeping the glass lens clean.

[0016] ③When the ultrasonic transducer is started, it drives the surrounding water to vibrate, and the glass lens near the ultrasonic transducer is ultrasonically cleaned to make the glass lens clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of an online sand measuring instrument based on the photoelectric method.

[0019] Figure 2 It is a cross-sectional view of the first specific embodiment.

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0021] Figure 4 It is a logic block diagram of the operation of an online sand measuring instrument based on the photoelectric method.

[0022] Figure 5 It is a cross-sectional view of the second specific embodiment.

[0023] In the figure: 1. Shell; 2. RTU telemetry terminal; 3. Turbidity sensor; 31. Glass lens; 4. Cleaning mechanism; 41. Motor; 42. Rotating rod; 43. Cleaning brush; 44. Connecting wire; 45. Ultrasonic transducer; 5. Protective cover; 51. Water permeable hole; 6. Temperature sensor; 7. Lithium battery; 8. Antenna; 9. Solar energy conversion module; 91. Charging wire. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Specific embodiment one:

[0026] like Figure 1 , Figure 2 As shown, an online sand measuring instrument based on the photoelectric method includes a shell 1, and also includes: an RTU telemetry terminal 2 arranged in the shell 1; a turbidity sensor 3 connected to the RTU telemetry terminal 2, and a glass lens 31 is arranged at the bottom of the turbidity sensor 3; a cleaning mechanism 4 for cleaning the glass lens 31; and a protective cover 5 arranged at the bottom of the shell 1.

[0027] The principle of turbidity measurement mainly includes Lambert-Beer law and the scattering effect of water sample on light, among which the scattering effect is mainly Rayleigh scattering and Mie scattering. Without considering the particle size in the liquid, the intensity of scattered light is proportional to the concentration of the liquid. The turbidity is measured by the turbidity sensor 3 using the light intensity attenuation, and the sediment content in the water is inferred by the comparison relationship between turbidity and sediment content.

[0028] The protective cover 5 is inserted into the bottom of the shell 1, and several screws are screwed into the connection between the protective cover 5 and the shell 1. The screws connect the protective cover 5 to the shell 1. The side wall of the protective cover 5 is provided with several water holes 51, and water can flow smoothly into the protective cover 5. The diameter of the water holes 51 is much larger than the particle size of the sediment, and the protective cover 5 does not affect the sediment flowing into the protective cover 5. The protective cover 5 blocks the glass lens 31. The protective cover 5 has no effect on the flow of water while blocking the glass lens 31. The glass lens 31 becomes darker and tends to be stable due to the blocking of the protective cover 5. The external light is blocked by the protective cover 5. There is no obvious change in brightness in the protective cover 5 during the day and at night. The protective cover 5 reduces the influence of day and night changes on turbidity measurement, so that the sand content measurement data obtained by the device is more accurate.

[0029] Since the turbidity sensor 3 is immersed in water for a long time, algae and other microorganisms will adhere to the glass lens 31. The growth and reproduction of algae on the glass lens 31 will make the glass lens 31 blurry, and the ability of the glass lens 31 to receive light will be weakened, affecting the measurement accuracy of the turbidity sensor 3. Therefore, a cleaning structure is required to clean the glass lens 31 to ensure that there is no pollution on the glass lens 31 and the light reception is unobstructed.

[0030] like Figure 3 As shown, the cleaning mechanism 4 includes a motor 41, a rotating rod 42 and a cleaning brush 43. The motor 41 is arranged at the bottom of the turbidity sensor 3. The fixed end of the motor 41 is connected to the bottom of the turbidity sensor 3. The rotating rod 42 is fixedly connected to the output end of the motor 41. The rotation of the motor 41 drives the rotating rod 42 to rotate. The cleaning brush 43 is bonded to the side wall of the rotating rod 42. The cleaning brush 43 can be made of rubber material. The cleaning brush 43 is used to clean the glass lens 31. The cleaning brush 43 scrapes off attachments such as algae on the glass lens 31.

[0031] The motor 41 is arranged on the side of the glass lens 31, and the rotating rod 42 rotates with the output end of the motor 41 as the axis. The length of the rotating rod 42 is greater than the diameter of the glass lens 31, and the cleaning brush 43 and the glass lens 31 are in the same horizontal plane. When the motor 41 drives the rotating rod 42 to rotate, the cleaning brush 43 can completely adhere to the glass lens 31 for friction, thereby scraping off the debris on the glass lens 31 and keeping the glass lens 31 clean.

[0032] The RTU telemetry terminal 2 is also connected with: a temperature sensor 6 for measuring water temperature, which uploads the water temperature of the detected water area in real time, so that the monitoring personnel can obtain more data to analyze the water quality; a lithium battery 7 for power supply, which provides power support for the RTU telemetry terminal 2, the turbidity sensor 3, and the temperature sensor 6, so that each device can work normally; and an antenna 8 for sending and receiving signals, which transmits the signal of the RTU telemetry terminal 2 to the receiving end. At the same time, the antenna 8 receives the control signal of the control end and transmits the control signal to the RTU telemetry terminal 2 to adjust each part.

[0033] like Figure 4 As shown, the RTU telemetry terminal 2 receives data and performs regulation through the APP, and displays the monitored parameters such as the sand content and water temperature on the APP. At the same time, the rotation frequency of the motor 41 is controlled through the APP. Normally, it is set to rotate the motor 41 five times every thirty minutes. The rotation frequency can be appropriately increased during the peak season of algae growth to ensure the cleanliness of the glass lens 31.

[0034] The lithium battery 7 is connected to one end of a charging line 91, and the other end of the charging line 91 is connected to a solar energy conversion module 9. The solar energy conversion module 9 converts solar energy into electrical energy to charge the battery, thereby ensuring the amount of electricity in the battery. Specific embodiment 2:

[0036] In this embodiment, except for the cleaning mechanism 4, other components are the same as those in the first embodiment.

[0037] like Figure 5 As shown, in this embodiment, the cleaning mechanism 4 includes a connecting line 44 and an ultrasonic transducer 45 , and the connecting line 44 connects the RTU telemetry terminal 2 and the ultrasonic transducer 45 .

[0038] The ultrasonic transducer 45 is arranged below the turbidity sensor 3. When the ultrasonic transducer 45 is started, it drives the surrounding water to vibrate, and ultrasonically cleans the glass lens 31 located near the ultrasonic transducer 45 to make the glass lens 31 clean. The start-up frequency and working time of the ultrasonic transducer 45 are controlled by APP.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An online sand measuring instrument based on a photoelectric method, comprising a housing (1), characterized in that: Also includes: An RTU telemetry terminal (2) disposed in the housing (1); A turbidity sensor (3) connected to the RTU telemetry terminal (2), wherein a glass lens (31) is provided at the bottom of the turbidity sensor (3); A cleaning mechanism (4) for cleaning the glass lens (31); and A protective cover (5) is arranged at the bottom of the housing (1).

2. The online sand measuring instrument based on the photoelectric method according to claim 1 is characterized in that: The side wall of the protective cover (5) is provided with a plurality of water-permeable holes (51), and the protective cover (5) shields the glass lens (31).

3. The online sand measuring instrument based on the photoelectric method according to claim 1 is characterized in that: The cleaning mechanism (4) comprises a motor (41), a rotating rod (42) and a cleaning brush (43); the motor (41) is arranged at the bottom of the turbidity sensor (3); the rotating rod (42) is fixedly connected to the output end of the motor (41); and the cleaning brush (43) is fixedly connected to the side wall of the rotating rod (42).

4. The online sand measuring instrument based on the photoelectric method according to claim 3 is characterized in that: The motor (41) is arranged on the side of the glass lens (31), the rotating rod (42) rotates with the output end of the motor (41) as an axis, and the cleaning brush (43) and the glass lens (31) are located at the same horizontal plane.

5. The online sand measuring instrument based on the photoelectric method according to claim 1 is characterized in that: The cleaning mechanism (4) comprises a connecting line (44) and an ultrasonic transducer (45), wherein the connecting line (44) connects the RTU telemetry terminal (2) and the ultrasonic transducer (45).

6. The online sand measuring instrument based on the photoelectric method according to claim 5 is characterized in that: The ultrasonic transducer (45) is arranged below the turbidity sensor (3).

7. The online sand measuring instrument based on the photoelectric method according to claim 1 is characterized in that: The RTU telemetry terminal (2) is also connected to: A temperature sensor (6) for measuring water temperature; A lithium battery (7) for power supply; and An antenna (8) for transmitting and receiving signals.

8. The online sand measuring instrument based on the photoelectric method according to claim 7 is characterized in that: The RTU telemetry terminal (2) receives data and performs regulation via the APP.

9. The online sand measuring instrument based on the photoelectric method according to claim 8, characterized in that: The lithium battery (7) is connected to one end of a charging line (91), and the other end of the charging line (91) is connected to a solar energy conversion module (9).

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