High-precision tipping bucket type rain sensor and manufacturing method thereof

Abstract

The invention provides a high-precision tipping bucket type rain sensor and a manufacturing method thereof. A tipping bucket rotating shaft is disposed on separation surfaces of two bucket rooms of atipping bucket; and the tipping bucket rotating shaft is arranged at the height between the lowest points of the inner sides of the bucket rooms and the bucket gravity center when the tipping bucket type rain sensor is arranged horizontally and the two bucket rooms are arranged at the equal heights. According to the invention, on the basis of limitation of the position of the tipping bucket rotating shaft, the error caused by the water film generated by water immersion at the inner side of the tipping bucket can be reduced even eliminated on premise that other normal functions and precision ofthe tipping bucket type rain sensor are not affected. Because no extra structures like the hydrophobic coating needs to be set, no newly increasing cost is caused; the durability is improved; the operability is high; and the effect is obvious. The precision of the tipping bucket type rain sensor is improved greatly.

Description

technical field [0001] The invention relates to the field of rain sensors, in particular to a high-precision tipping bucket rain sensor and a manufacturing method thereof. Background technique [0002] The tipping bucket rain sensor is a hydrological and meteorological instrument, which is used to measure natural rainfall, and at the same time convert the rainfall into digital information output in the form of a switch to meet the needs of information transmission, processing, recording and display. The traditional tipping bucket rain sensor generally can only achieve an error of ±4%, which is increasingly unable to meet the requirements for meteorological historical records and data analysis. [0003] One of the more important error sources of the tipping bucket rain sensor is that in the process of rainfall calculation, the inner side of the tipping bucket used to hold rainwater will inevitably be soaked by rainwater under normal circumstances, thus forming on the inner si...

AI Technical Summary

Problems solved by technology

The traditional tipping bucket rain sensor generally can only achieve an error of ±4%, which is increasingly unable to meet the requirements for meteorological historical records and data analysis

[0003] One of the more important error sources of the tipping bucket rain sensor is that in the process of rainfall calculation, the inner side of the tipping bucket used to hold rainwater will inevitably be soaked by rainwater under normal circumstances, thus forming on the inner side of the tipping bucket. A thin layer of water film, although the quality of the water film is negligible in most scenes, but when the tipping bucket rain sensor is set to a high precision, the rainwater quality threshold for each tipping bucket is very low Small, the quality of the water film cannot be ignored, and may cause a large error, so that the tipping bucket rain sensor cannot meet the accuracy requirements

[0004] In the prior art, this problem is generally overcome by installing a hydrophobic coating on the inside of the tipping bucket. However, the service life of the hydrophobic coating is not long, and the design working life of the tipping bucket rain sensor must be at least several years. Once the hydrophobic coating loses its effect due to long-term use, the accuracy of the entire tipping bucket rain sensor will not be guaranteed, and this kind of error is difficult to be found by remote monitoring, which greatly increases the risk of inaccurate rainfall data collection

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