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a rainfall sensor

A sensor and rainfall technology, which is applied in the electronic field, can solve the problems of low sensitivity of rainfall sensors and the inability to accurately measure the volume of raindrops, etc., and achieve the effect of improving measurement accuracy

Active Publication Date: 2022-04-05
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the object of the present invention is to provide a rainfall sensor to alleviate the technical problem that the existing rainfall sensors have low sensitivity and cannot accurately measure the volume of small raindrops

Method used

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Embodiment 1

[0038] figure 1 is a rainfall sensor according to an embodiment of the present invention, such as figure 1 As shown, the sensor includes: a housing 10, a piezoelectric vibrator 20, a signal processing circuit 30 and a processor 40, wherein the signal processing circuit 30 is connected to the piezoelectric vibrator 20 and the processor 40 respectively , the piezoelectric vibrator 20 is disposed inside the housing 10, and the piezoelectric vibrator 20 includes a plurality of parallel-connected piezoelectric sensing elements;

[0039] The housing 10 is used for elastically deforming when impacted by raindrops to generate mechanical vibration signals;

[0040] The piezoelectric vibrator 20 is used to obtain the mechanical vibration signal, convert the mechanical vibration signal into an electrical signal, and send the electrical signal to the signal processing circuit;

[0041] The signal processing circuit 30 is used to perform signal processing on the electrical signal to obtain...

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Abstract

The present invention provides a rainfall sensor, which relates to the field of electronic technology and includes: a housing, a piezoelectric vibrator, a signal processing circuit and a processor, wherein the signal processing circuit is connected to the piezoelectric vibrator and the processor respectively, and the piezoelectric vibrator The vibrator is arranged inside the shell, and the piezoelectric vibrator includes a plurality of piezoelectric sensing elements connected in parallel; the outer wall of the shell is used to elastically deform when hit by raindrops to generate mechanical vibration signals; the piezoelectric vibrator is used to obtain mechanical vibration signals. vibration signal, and convert the mechanical vibration signal into an electrical signal, and send the electrical signal to the signal processing circuit; the signal processing circuit is used to process the electrical signal to obtain a DC pulse signal; the processor is used to convert the peak value of the DC pulse signal The voltage is converted into the volume of each raindrop, and the volume of all raindrops is summed to obtain the rainfall. The invention solves the technical problem of low measurement accuracy of the existing rainfall sensors.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a rainfall sensor. Background technique [0002] The existing rainfall measuring instruments based on the vibration method are divided into two types according to the measurement principle: magnetoelectric and piezoelectric. The rainfall measuring instruments based on the principle of magnetoelectricity are heavy in weight, large in power consumption, and high in cost, and are not suitable for mass production. Engineering Applications. The main problem of existing piezoelectric precipitation measuring instruments is that it is difficult to ensure high measurement accuracy for heavy rain, light rain and rainfall microscopic characteristics. For example, the piezoelectric rainfall sensor cannot obtain a uniform vibration response in the entire sensing area, causing errors in the measurement of individual raindrops; the sensor sensitivity is insufficient, making it difficult to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01W1/14
CPCG01W1/14
Inventor 朱力强
Owner BEIJING JIAOTONG UNIV