Tipping bucket type rain gauge capable of correcting overlarge rainfall intensity in real time

Abstract

The invention discloses a tipping-bucket rain gauge capable of correcting overlarge rainfall intensity in real time, and belongs to the technical field of metering tools. The invention relates to a tipping bucket type rain gauge capable of correcting overlarge rain intensity in real time. The tipping bucket type rain gauge comprises a shell (1), a rain receiving port (2), a funnel (3), a reed switch (4), a tipping bucket (5), a supporting bearing (6), a water outlet bin (7), a leveling bracket (8), a rainwater collecting bin (9), a normally-opened water inlet valve (10), a probe mounting slide rail (11), a water level probe (12), a normally-closed water drain valve (13), a water outlet (14), a rainfall control chamber (15) and a hydrological telemetering RTU (16). According to the invention, the low cost and high efficiency of the original tipping bucket rain gauge are ensured, and the total amount of rainfall in the time period is corrected, so that the correctness and timeliness of rainfall data are ensured, and a decisive effect can be achieved in flood prevention and disaster reduction work.

Description

Technical Field

[0001] The invention relates to the technical field of measuring tools, and in particular to a tipping bucket rain gauge capable of correcting extremely heavy rainfall in real time. Background Art

[0002] Rainfall measurement is of great significance in the fields of meteorology and hydrology. Traditional siphon rain gauges are gradually withdrawn from the market because they are not suitable for unattended operation and remote telemetry. They are only used in some special occasions (such as evaporation observation stations for manual observation). Currently, the commonly used remote sensing rain gauges mainly include three types of structures: tipping bucket type, weighing type, and optical type.

[0003] The weighing rain gauge has high accuracy, but the precision electronic scale becomes the main cost of this system, and the promotion work is progressing slowly.

[0004] Optical rain gauges are affected by dust and fog, which can interfere with the observed values. In addition, the maintenance cost of optical sensors is high and they have not yet reached the level of large-scale promotion and application.

[0005] The tipping bucket rain gauge has a simple structure and low price, and is relatively easy to manufacture and promote. It has become the mainstream product for remote sensing rainfall observation in the current market, accounting for about 90% of the total market share.

[0006] However, due to the limitations of the mechanical structure design of the tipping bucket rain gauge, it is greatly affected by the sensitivity of the tipping bucket when recording precipitation. When the rainfall intensity is relatively high, on the one hand, it will produce inertial flipping and the recorded rainfall value will be too large. On the other hand, when the rainfall intensity is extremely high, the tipping bucket will not have time to flip and the recorded value will be seriously small. Summary of the invention

[0007] The purpose of the present invention is to provide a tipping bucket rain gauge which can correct the extremely heavy rainfall in real time, so as to solve the problems of other remote sensing rain gauges having high body cost, being susceptible to interference, having high maintenance cost and having large errors.

[0008] In order to achieve the above object, the present invention provides the following technical solutions: A tipping bucket rain gauge capable of real-time correction for extremely heavy rainfall intensity, comprising a housing (1), a rain receiving port (2), a funnel (3), a reed switch (4), a tipping bucket (5), a support bearing (6), a water outlet bin (7), a leveling bracket (8), a rainwater collection bin (9), a normally open water inlet valve (10), a measuring needle mounting slide rail (11), a water level measuring needle (12), a normally closed drain valve (13), a water outlet (14), a rainfall control room (15), and a hydrological telemetry RTU (16); The outer portion of the tipping bucket rain gauge is a shell (1). The upper opening of the shell (1) is provided with a rain receiving opening (2) in a funnel shape that is biased inward. The funnel (3) is provided below the rain receiving opening (2). A drainage pipeline is connected below the funnel (3). The reed switch (4) is embedded in the drainage pipeline. The tipping bucket (5) fixed by the support bearing (6) is provided on the drainage pipeline below the reed switch (4). The bottom end of the drainage pipeline is fixed on the leveling bracket (8). Water outlet bins (7) are provided below the two sides of the tipping bucket (5). A rainwater collection bin (9) is provided below the water outlet bin (7). The rainwater collection bin (9) is provided below the rainwater collection bin (10). 9) is connected to a drainage pipeline at the bottom, the normally open water inlet valve (10) is arranged in the middle of the drainage pipeline, the lower end of the drainage pipeline is connected to the rainfall control chamber (15), the inner wall of the rainfall control chamber (15) is provided with the probe mounting slide rail (11), the water level probe (12) is arranged on the probe mounting slide rail (11), the lower end of the rainfall control chamber (15) is provided with the water outlet (14), the water outlet (14) is provided with the normally closed drain valve (13), the lower inner wall of the housing (1) is provided with a hydrological telemetry RTU (16), the true value output by the hydrological telemetry RTU (16) is a combination of the measurement result and the correction value.

[0009] Furthermore, the hydrological telemetry RTU (16) is electrically connected to the reed switch (4), the normally open water inlet valve (10), and the normally closed water drain valve (13), respectively.

[0010] Furthermore, the rainfall control chamber (15) has three capacity specifications of 10 mm, 20 mm, and 30 mm.

[0011] Furthermore, the normally open water inlet valve (10) and the normally closed water drain valve (13) are solenoid valves.

[0012] Furthermore, the hydrological telemetry RTU (16) has a double pulse counting function.

[0013] The beneficial effect of the present invention is that: while ensuring the low cost and high efficiency of the original tipping bucket rain gauge, the present application corrects the total amount of rainfall in a period of time, thereby ensuring the accuracy and timeliness of rainfall data, and can play a decisive role in flood prevention and disaster reduction work.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0016] Figure 2 This is a terminal interface diagram of a telemetry RTU according to an embodiment of the present invention.

[0017] In the figure: 1. Shell; 2. Rain receiving port; 3. Funnel; 4. Reed switch; 5. Tipping bucket; 6. Support bearing; 7. Water outlet bin; 8. Leveling bracket; 9. Rainwater collection bin; 10. Normally open water inlet valve; 11. Probe mounting slide rail; 12. Water level probe; 13. Normally closed drain valve; 14. Water outlet; 15. Rainfall control room; 16. Hydrological telemetry RTU. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1 A tipping bucket rain gauge capable of real-time correction of extremely heavy rainfall intensity as shown in an embodiment of the present application comprises a housing 1, a rain receiving port 2, a funnel 3, a reed switch 4, a tipping bucket 5, a support bearing 6, a water outlet bin 7, a leveling bracket 8, a rainwater collection bin 9, a normally open water inlet valve 10, a measuring needle mounting slide rail 11, a water level measuring needle 12, a normally closed drain valve 13, a water outlet 14, a rainfall control room 15, and a hydrological telemetry RTU 16; The outer part of the tipping bucket rain gauge is a shell 1, the upper opening of the shell 1 is provided with a funnel-shaped rain receiving port 2 that is biased to the inside, a funnel 3 is provided below the rain receiving port 2, a sewer pipe is connected below the funnel 3, a reed switch 4 is embedded in the sewer pipe, a tipping bucket 5 fixed by a support bearing 6 is provided on the sewer pipe below the reed switch 4, the bottom end of the sewer pipe is fixed on a leveling bracket 8, water outlet bins 7 are provided below the two sides of the tipping bucket 5, a rainwater collection bin 9 is provided below the water outlet bin 7, and a A sewer pipe, a normally open water inlet valve 10 is arranged in the middle of the sewer pipe, a rainfall control chamber 15 is connected to the lower end of the sewer pipe, a probe mounting slide rail 11 is arranged on the inner wall of the rainfall control chamber 15, a water level probe 12 is arranged on the probe mounting slide rail 11, a water outlet 14 is arranged at the lower end of the rainfall control chamber 15, a normally closed drain valve 13 is arranged on the water outlet 14, a hydrological telemetry RTU 16 is arranged on the inner wall of the lower side of the shell 1, and the true value output by the hydrological telemetry RTU (16) is a combination of the measurement result and the correction value.

[0020] The hydrological telemetry RTU (16) is electrically connected to the reed switch (4), the normally open water inlet valve (10), and the normally closed water discharge valve (13) respectively.

[0021] The rainfall control chamber 15 has three capacity specifications of 10mm, 20mm and 30mm.

[0022] The normally open water inlet valve 10 and the normally closed water drain valve 13 are solenoid valves.

[0023] Hydrological telemetry RTU16 has a double pulse counting function.

[0024] When in use, the device is placed in the detection position. When it rains, the rainwater receiving port 2 receives rainwater and transmits it to the funnel 3. Then the rainwater flows along the sewer pipe through the reed switch 4 to the tipping bucket 5, and then along the tipping bucket 5 to the support bearing 6 and the water outlet bin 7. The water discharged from the tipping bucket is collected in the rainwater collection bin (9), and a water level measuring needle (12) is installed in the collection bin. It is a water immersion switch similar to that used for observing evaporation. When the probe touches the water, a switch closing signal will be issued. The signal will close the normally open water inlet valve (10) and open the normally closed water discharge valve (13). The valve opening and closing time is 2.5s. This is designed based on the experiment of emptying the water volume of the entire water collection bin. After the delay, the water discharge valve is closed and the water inlet valve is opened. In order to ensure the switching sequence of the water inlet valve and the water discharge valve, the switch of the water inlet valve is connected to the water discharge valve. As long as the water discharge valve is in the open state, the water inlet valve will be in the closed state. (To ensure low power consumption, the water inlet valve is designed to be normally open and the water discharge valve is designed to be normally closed).

[0025] The water level probe (12) can move up and down along the slide rail (11), so that it can be set at 5mm, 10mm, and 20mm according to user needs, so as to achieve the purpose of checking every 5, 10, and 20mm. When the water level touches the probe, a switch closing signal will be sent. At this time, no matter how much the tipping bucket count is, the cumulative value of the tipping bucket is corrected according to this signal. From the output data, if it is a positive correction (the tipping bucket measurement value is too small, the correction value is a positive number), the rainfall is supplemented in the period when the probe signal arrives; if it is a negative correction (the tipping bucket measurement value is too large, the correction value is a negative number), that is, the cumulative value of rainfall at the end of this period is reset to the cumulative value of the probe signal 1, minus the cumulative value of the tipping bucket in the previous period 0, the result is a negative number, then the rainfall record of this period is a negative value, the rainfall of this period is reported as zero when reporting the flood, and the test record is a negative value, and this negative value is used to correct the rainfall of the previous few time periods when compiling.

[0026] Figure 2G is the common ground terminal. G and K1 are connected to the two terminals of the counting switch (reed switch (3)) of the tipping bucket rain gauge; G and K2 are connected to the switch closing signal given by the water level probe (11). If the parameters of the tipping bucket rain gauge are 0.2mm per bucket, 1mm additional report and the cumulative correction value of rainfall is 10mm, then in the RTU configuration parameters, the K1 sensor is set to the tipping bucket rain gauge, the resolution is set to 0.2mm, and the rainfall additional report threshold is set to 5 buckets. The K2 sensor is set to the rainfall cumulative value correction, and the correction value is set to 50. Then the rainfall in the period = (k1 cumulative value in this period - k1 cumulative value in the previous period) * 0.2; when K2 counts, the cumulative value of K1 in this period = K2 cumulative value * 50, and it is executed immediately. When the cumulative value of k1 is reset, the cumulative value of K2 is also reinitialized: at this time, the cumulative value of K2 is set to INT (k1 cumulative value / 50).

[0027] INT__ integer function, true value = measurement result + correction value.

[0028]

[0029] In summary, the present invention provides a tipping bucket rain gauge that can correct extremely heavy rainfall in real time. While ensuring the low cost and high efficiency of the original tipping bucket rain gauge, the rain gauge corrects the total amount of rainfall in a period of time, thereby ensuring the accuracy and timeliness of rainfall data, and can play a decisive role in flood prevention and disaster reduction work.

[0030] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A tipping bucket rain gauge capable of real-time correction for extremely heavy rainfall, characterized in that: It comprises a housing (1), a rain receiving port (2), a funnel (3), a reed switch (4), a tipping bucket (5), a supporting bearing (6), a water outlet bin (7), a leveling bracket (8), a rainwater collection bin (9), a normally open water inlet valve (10), a measuring needle mounting slide rail (11), a water level measuring needle (12), a normally closed drain valve (13), a water outlet (14), a rainfall control room (15), and a hydrological telemetry RTU (16); The outer portion of the tipping bucket rain gauge is a shell (1). The upper opening of the shell (1) is provided with a rain receiving opening (2) in a funnel shape that is biased inward. The funnel (3) is provided below the rain receiving opening (2). A drainage pipeline is connected below the funnel (3). The reed switch (4) is embedded in the drainage pipeline. The tipping bucket (5) fixed by the support bearing (6) is provided on the drainage pipeline below the reed switch (4). The bottom end of the drainage pipeline is fixed on the leveling bracket (8). Water outlet bins (7) are provided below the two sides of the tipping bucket (5). A rainwater collection bin (9) is provided below the water outlet bin (7). The rainwater collection bin (9) is provided below the rainwater collection bin (10). 9) is connected to a drainage pipeline at the bottom, the normally open water inlet valve (10) is arranged in the middle of the drainage pipeline, the lower end of the drainage pipeline is connected to the rainfall control chamber (15), the inner wall of the rainfall control chamber (15) is provided with the probe mounting slide rail (11), the water level probe (12) is arranged on the probe mounting slide rail (11), the lower end of the rainfall control chamber (15) is provided with the water outlet (14), the water outlet (14) is provided with the normally closed drain valve (13), the lower inner wall of the housing (1) is provided with a hydrological telemetry RTU (16), the true value output by the hydrological telemetry RTU (16) is a combination of the measurement result and the correction value.

2. A tipping bucket rain gauge capable of real-time correction of extremely heavy rainfall intensity as claimed in claim 1, characterized in that: The hydrological telemetry RTU (16) is electrically connected to the reed switch (4), the normally open water inlet valve (10), and the normally closed water discharge valve (13), respectively.

3. A tipping bucket rain gauge capable of real-time correction of extremely heavy rainfall intensity as claimed in claim 1, characterized in that: The rainfall control chamber (15) has three capacity specifications: 10 mm, 20 mm, and 30 mm.

4. A tipping bucket rain gauge capable of real-time correction for extremely heavy rainfall intensity as claimed in claim 1, characterized in that: The normally open water inlet valve (10) and the normally closed water drain valve (13) are solenoid valves.

5. A tipping bucket rain gauge capable of real-time correction of extremely heavy rainfall intensity as claimed in claim 1, characterized in that: The hydrological telemetry RTU (16) has a double pulse counting function.

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