Measuring device for detecting weighing type rain gauge

Abstract

The utility model relates to the field of rain gauge measuring equipment, in particular to a measuring device for detecting a weighing type rain gauge, which comprises a rain dropping device, an air hole is arranged at the top of the rain dropping device, a constant speed device is arranged at the bottom of the rain dropping device, and a plurality of support rods are uniformly distributed on the periphery of the bottom end of the rain dropping device. According to the utility model, the structure is reasonable, the use is convenient, and during the measurement of the weighing type rain gauge, the water injection rate is dropped into the rain gauge at a constant speed, so that the reading of the rain gauge can be accurately output in the form of the water injection rate, errors are avoided, and the efficiency of field calibration is improved; and the problems of low speed and large error caused by manual rainfall injection into the rain gauge are also avoided.

Description

Technical Field

[0001] The utility model relates to the field of rain gauge measuring equipment, in particular to a measuring device for detecting a weighing type rain gauge. Background Art

[0002] In the process of water filling to test the accuracy of the weighing rain gauge, if water is directly injected into the rain gauge in the simulated precipitation experiment, the rain gauge may mistake the injected water for rainfall due to the filtering algorithm and automatically delete the data. Therefore, water filling must be carried out within a speed range. If water is poured manually, people are required to slowly inject water into the rain gauge at a certain speed. This is inefficient and has large errors. Not only can the water filling speed, i.e., the rainfall intensity, not be guaranteed, but the outdoor field environment is sometimes hot or cold, which also causes inconvenience to the field operators. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the above-mentioned technology and provide a measuring device for detecting a weighing type rain gauge.

[0004] A measuring device for detecting a weighing rain gauge comprises a rain dropper, wherein an air hole is arranged on the top of the rain dropper, a speed regulator is arranged on the bottom, and a plurality of supporting rods are evenly distributed around the bottom end of the rain dropper.

[0005] Furthermore, the rain dropper comprises a transparent tube, a top cover is provided on the top of the transparent tube, the air hole is provided on the top cover, a base is provided at the bottom end of the transparent tube, and the speed regulator and the support rod are installed on the base.

[0006] Furthermore, the top end of the transparent tube is threadedly connected to the top cover, the bottom end of the transparent tube is threadedly connected to the base, and the support rod is threadedly connected to the base.

[0007] Furthermore, an anti-slip rubber ring is provided at one end of the support rod away from the base.

[0008] The utility model has the advantages of reasonable structure and convenient use. In the measurement of the weighing rain gauge, the water injection amount is dripped into the rain gauge at a constant speed, so that the reading of the rain gauge can be accurately output in the form of the water injection amount, avoiding errors and improving the efficiency of on-site verification; it also avoids the problem of slow speed and large error when artificial precipitation is injected into the rain gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a three-dimensional schematic diagram of a measuring device for detecting a weighing rain gauge of the utility model;

[0010] Figure 2 It is a cross-sectional schematic diagram of a measuring device for detecting a weighing rain gauge of the utility model;

[0011] Figure 3 The utility model is a schematic diagram of a measuring device for detecting a weighing rain gauge.

[0012] As shown in the figure: 1. Rain dropper; 2. Air hole; 3. Speed ​​regulator; 4. Support rod; 5. Anti-slip rubber ring; 101. Transparent tube; 102. Top cover; 103. Base; 1-1. Weighing rain gauge. DETAILED DESCRIPTION

[0013] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0014] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0015] In the description of the embodiments of the present utility model, if a feature is referred to as being "set", "fixed", "connected" or "installed" on another feature, it may be directly set, fixed, connected to another feature, or indirectly set, fixed, connected, or installed on another feature.

[0016] In the description of the embodiments of the present utility model, if "several" is involved, it means more than one, if "multiple" is involved, it means more than two, if "greater than", "less than" or "exceed" is involved, it should be understood as not including the number itself, if "above", "below" or "within" is involved, it should be understood as including the number itself. If "first" or "second" is involved, it should be understood as being used to distinguish technical features, and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0017] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0018] A measuring device for detecting a weighing rain gauge comprises a rain dropper 1, wherein an air hole 2 is arranged on the top of the rain dropper 1, a speed regulator 3 is arranged on the bottom, and a plurality of support rods 4 are evenly distributed around the bottom end of the rain dropper 1.

[0019] The rain dropper 1 comprises a transparent tube 101 , a top cover 102 is disposed on the top of the transparent tube 101 , the air hole 2 is disposed on the top cover 102 , a base 103 is disposed at the bottom of the transparent tube 101 , and the speed regulator 3 and the support rod 4 are mounted on the base 103 .

[0020] The top end of the transparent tube 101 is threadedly connected to the top cover 102, the bottom end of the transparent tube 101 is threadedly connected to the base 103, and the support rod 4 is threadedly connected to the base 103. The threaded connection is firm and easy to disassemble. If the support rod is not disassembled, the overall volume is large and it is inconvenient to place.

[0021] An anti-slip rubber ring 5 is disposed at one end of the support rod 4 away from the base 103 .

[0022] When the utility model is used, the components are assembled according to the method, and the speed regulator 3 is blocked before water is injected into the rain dropper 1, such as using a plug cap on the outside, and the top cover 102 is not covered, and the detection water is injected into the rain dropper 1, and the top cover 102 is screwed tightly, and the support rod 4 is used to place it at the rainwater collection port of the weighing rain gauge, such as Figure 1 As shown, open and remove the plug cap, and then use the speed controller 3 to drip water into the weighing rain gauge for detection.

[0023] Working principle of the utility model: during the water injection calibration process, as the water level in the rain dropper 1 drops, the air pressure in the space above the water surface drops accordingly. When the internal and external pressures are unbalanced, under the action of the external atmospheric pressure, the outside air will pass through the air hole 2 at the top of the rain dropper 1 to replenish the air in the rain dropper 1 to maintain the internal and external pressure balance. Therefore, it can be ensured that the pressure in the rain dropper (the sum of the internal air pressure and the water pressure) is always consistent with the external atmospheric pressure, thereby ensuring the constancy of the water flow rate of the rain dropper. The constant water injection flow rate is the key to ensuring the calibration accuracy.

[0024] Example

[0025] When the weighing rain gauge is calibrated, the utility model is also equipped with a national standard rain gauge cup and the like.

[0026] The rain dropper 1 and the speed regulator 3 of the utility model are used to drop rain into the weighing rain gauge and provide a relatively constant rain drop flow rate, that is, a constant simulated rain intensity, during the calibration process. Different simulated rain intensities can be achieved by replacing speed regulators of different specifications. The utility model is an indispensable core component for completing the calibration of the weighing rain gauge.

[0027] The support frame of the rain receiving opening of the weighing rain gauge formed by the support rod 4 of the utility model is used for stably supporting the rain dropper above the rain receiving opening of the weighing rain gauge.

[0028] The rain gauge is used to measure the standard rainfall before calibration, that is, the precise rainfall required for dripping before dynamic testing, to ensure the accuracy of the comparison between the dripping data and the test data.

[0029] Raindrops are used to constantly simulate accurate and realistic rainfall.

[0030] Rain dropper: Choose 4mm / min or 8mm / min rain speed regulator.

[0031] Applicable to the test object: water container with a diameter of 200cm 2 、400cm 2 and 314cm 2 Weighing rain gauge.

[0032] Main technical performance and parameters:

[0033] ①Rain drop volume: 0.5~12mm (adjustable)

[0034] ② Single calibration quantity: ≤12mm

[0035] ③Output rainfall intensity: 4mm / min, 8mm / min

[0036] ④Rain intensity error: ≤±10%

[0037] ⑤Working environment: temperature 0℃~+65℃ humidity ≤90%RH

[0038] ⑥Test object: Rain receiver area 200cm 2 、400cm 2 and 314cm 2 .

[0039] Determination process:

[0040] The rain dropper 1 is placed at the rain receiving port of the weighing rain gauge through the support rod 4. The rain dropper 1 is used to inject water into the weighing rain gauge and provide a relatively constant water injection flow (i.e., a constant simulated rain intensity) during the whole calibration process. Different simulated rain intensities can be achieved by replacing the speed regulator 3 that does not pass the specification.

[0041] The rain inlet of the weighing rain gauge is 200cm 2 、400cm 2 and 314cm 2As a benchmark, with standard 4mm / min drippers and 8mm / min drippers, it is ensured that the water volume drips into the rain gauge at a constant speed, so that the reading of the rain gauge can be accurately output in the form of water volume, avoiding errors and improving the efficiency of on-site verification.

[0042] According to the requirements of SL / T811.4-2021 "Rainfall Observation Instruments Part 4: Weighing Raingauge", titration measurement experiments are carried out on equipment after installation or during regular maintenance based on the maximum allowable error and repeatability standards.

[0043] Power on the whole weighing rain gauge device, connect the weighing rain gauge to the computer using a USB to 485 standard serial port cable, open the serial port debugging software, and operate according to the configuration connection requirements;

[0044] Carry out water filling test on the equipment and titration measurement experiment, inject 2-10mm rainfall value into the weighing rain gauge at least 6 times each time, check the collected data and compare it with the injected rainfall value. The error of correct data should be within ±2%.

[0045] The specific steps are as follows.

[0046] 1) Please prepare the testing equipment and water volume in advance. After the equipment is powered on for ten minutes, use a rain gauge to measure 4mm of water and it is ready.

[0047] 2) Assemble the rain dropper and the rain receiving port bracket, fix them on the rain receiving port as a whole, and directly inject the rainfall in the rain measuring cup into the rain dropper, so that the rainfall drips into the weighing rain gauge at a rainfall intensity of 4 mm / min;

[0048] After completing the simulated rainfall, you need to wait for 5 minutes. According to the different time periods for rainfall injection into the bucket and the order of data collection and reporting, the final non-real-time cumulative rainfall value will be reported in succession after 5 minutes. Check the data monitored by the serial port tool and compare it with the injected rainfall value. Calculate the average error based on the number of tests. The maximum allowable error should be ±2%.

[0049] With an area of ​​314cm 2 An example of a weighing rain meter is as follows: 8 mm of rainfall is injected, and the serial port tool monitors data of 39.39 mm of rainfall. The previous group of data is 31.47 mm of rainfall. The difference is 7.92 mm of rainfall. The difference in rainfall values ​​collected in this group is 8-7.92=0.08 mm, and the error ratio is 1%, which meets the national standard.

[0050] Verification results and their applications:

[0051] The verification result of the utility model can be used as an important basis for the measurement accuracy of the weighing rain gauge being tested. However, it is not possible to judge whether the verification object is qualified by relying on the result of a single verification.

[0052] Different from the self-displacement method, the utility model adopts the fixed water volume method to calibrate the weighing rain gauge. For the 4mm rain gauge, it is recommended to calibrate at least 5 times in succession; for the 8mm rain gauge, it is recommended to calibrate at least 5 times in succession, and then compare the rainfall values ​​after multiple calibrations with the theoretical values ​​to obtain a relatively reasonable calibration result.

[0053] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A measuring device for detecting a weighing rain gauge, characterized in that: The invention comprises a rain dropper (1), wherein the top of the rain dropper (1) is provided with an air hole (2), the bottom is provided with a speed regulator (3), and a plurality of support rods (4) are evenly distributed around the bottom end of the rain dropper (1).

2. A measuring device for detecting a weighing rain gauge according to claim 1, characterized in that: The rain dropper (1) comprises a transparent tube (101), a top cover (102) is provided on the top of the transparent tube (101), the air hole (2) is provided on the top cover (102), a base (103) is provided at the bottom end of the transparent tube (101), and the speed regulator (3) and the support rod (4) are installed on the base (103).

3. A measuring device for detecting a weighing rain gauge according to claim 2, characterized in that: The top end of the transparent tube (101) is threadedly connected to the top cover (102), the bottom end of the transparent tube (101) is threadedly connected to the base (103), and the support rod (4) is threadedly connected to the base (103).

4. A measuring device for detecting a weighing rain gauge according to claim 2 or 3, characterized in that: An anti-slip rubber ring (5) is provided at one end of the support rod (4) away from the base (103).

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