Rainfall measuring system based on pressure sensor

A pressure sensor and measurement system technology, which is used in measurement devices, heat measurement, and fluid pressure measurement. Strong external interference ability, stable and reliable performance

Pending Publication Date: 2019-05-31
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are certain defects. The measurement accuracy of the tipping bucket rain gauge is greatly affected by the rain intensity. The greater the rain intensity, the greater the error
The siphon type cannot be observed automatically and cannot meet the requirements of modern measurement
Ultrasonic type has poor measurement accuracy due to the fact that ultrasonic waves are greatly affected by the external environment

Method used

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  • Rainfall measuring system based on pressure sensor
  • Rainfall measuring system based on pressure sensor
  • Rainfall measuring system based on pressure sensor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] The specific measurement process is introduced as follows:

[0028] Such as figure 1 As shown, when the rainfall occurs, the raindrops fall on the steel cover above the pressure sensor, generating impact force, the strain gauge of the pressure sensor is deformed, and the change of resistance is converted into the change of voltage; the voltage signal obtained by the pressure sensor is passed through the signal The amplification processing and filtering circuit of the processing unit perform signal amplification and filtering respectively, amplify into a signal that can be recognized by the main controller, and enter the AD conversion module for analog-to-digital conversion;

[0029] At the same time, the sensitive element PT100 of the temperature measurement module also measures the working temperature of the pressure sensor in real time, and converts it into a voltage signal through the temperature measurement circuit, and sends it to the AD conversion module for analo...

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PUM

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Abstract

The invention discloses a rainfall measuring system based on a pressure sensor. The system comprises a pressure sensor, a signal processing module, an AD conversion module, a temperature measurement module, a main controller, and a wireless transmission module. The pressure sensor converts a collected rainfall pressure signal into a voltage signal, and the voltage signal is amplified and filteredby the signal processing module and then sent to the main controller for calculation. After the calculation of the rainfall, the signal is wirelessly transmitted to the computer for storage and display. The rainfall is converted into a voltage through the pressure sensor, so there is no need of physical collection of the rainfall, thereby avoiding the errors caused by problems of rainfall evaporation, overflow, blockage and the like, and improving the measurement precision.

Description

technical field [0001] The invention relates to a rain gauge system based on a pressure sensor. Background technique [0002] Within a certain period of time, the depth of the water layer falling on the ground without leakage, evaporation, and loss is called rainfall. Rainfall is one of the six elements of meteorology, which can measure the amount of precipitation in an area. The amount of precipitation affects all aspects of human production and life. Excessive precipitation will bring floods, mudslides and other natural disasters. Too little precipitation will easily cause drought and cause economic losses to people. Therefore, strengthening the forecast and measurement of rainfall and improving early warning capabilities play an important role in reducing economic losses caused by natural disasters. [0003] Existing rain gauges mainly include bucket type, siphon type, weighing type, etc. With the development of sensing technology and computing technology, various typ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14G01K7/18G01L19/04
Inventor 田野叶小岭章璇胡全辉陈畅
Owner NANJING UNIV OF INFORMATION SCI & TECH
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