Rainfall sensor online calibration system based on peristaltic pump

Abstract

The invention discloses a rainfall sensor online calibration system based on a peristaltic pump. The system comprises an upper computer and a calibrator, the calibrator is connected with a tipping bucket type rain gauge; the upper computer is in wireless connection with the calibrator; and the calibrator comprises a single-chip microcomputer, a peristaltic pump and an electromagnetic valve. One end of the peristaltic pump is connected with a water storage chamber through a water inlet pipe, the other end of the peristaltic pump is connected with a water receiver of the tipping bucket type raingauge through a water outlet pipe, the electromagnetic valve is arranged between the tipping bucket type rain gauge and the water storage chamber, and the peristaltic pump and the electromagnetic valve are electrically connected with the single-chip microcomputer. According to the invention, automatic simulation and verification of various rain intensities are realized, finally signals are collected for data processing, and an upper computer can perform unified management of multi-site information; and moreover, the remote control problem is solved by using a wireless communication technology, the verification precision and the working efficiency are effectively improved, and better outdoor adaptability is achieved.

Description

technical field [0001] The invention belongs to the technical field of calibrating devices for tipping bucket rain gauges, and in particular relates to an online calibrating system for rain gauges based on peristaltic pumps. Background technique [0002] The general verification method of the rain gauge is to take a certain amount of water and make it flow into the water receiving funnel of the rain gauge at a fixed speed for a specified period of time, so as to simulate the precipitation record value of the rain gauge under the precipitation environment of different rain intensities, and compare it with the calibration value Then the accuracy of the rain gauge can be determined. The existing rain gauge verification and calibration devices are divided into outdoor on-site verification devices and indoor verification devices according to the use occasions. These two devices have the following different defects: [0003] Previous on-site rain gauge verification and calibratio...

AI Technical Summary

Problems solved by technology

[0004] (1) The accuracy is poor, the water flow velocity has a large difference before and after, and the time length of the water flow is unstable, so it is impossible to accurately simulate different rain intensities;

[0005] (2) Basically rely on manual operation, which is complicated and time-consuming, and takes up manpower;

[0006] (3) The data collection is greatly affected by the operator's human factors, sometimes it is inevitable to misuse, and there are many uncertain factors;

[0007] (4) Archives cannot be established automatically, and it is difficult to ensure the integrity of long-term verification data;

[0008] (5) The accuracy of the verification device itself changes with time, which affects the verification effect

[0009] Previously, there were some verification devices used indoors. Although the accuracy was guaranteed to a certain extent, they had defects such as low degree of automation, large volume, heavy weight, incomplete software functions, and high cost. Especially, they could not be used for outdoor on-site verification.

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