Laboratory calibration method for soil moisture sensors

A calibration method and soil moisture content technology, which is applied in the direction of instruments, scientific instruments, soil material testing, etc., can solve the problems of long calibration cycle, long time consumption, and heavy labor, and achieve high accuracy, reduced labor, and small errors. Effect

Inactive Publication Date: 2016-12-21
XIAN SITAN ENVIRONMENT TECH CO LTD
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Problems solved by technology

[0002] The soil moisture sensor needs to be calibrated in the laboratory before leaving the factory. The previous laboratory calibration method needs to go through the p

Method used

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  • Laboratory calibration method for soil moisture sensors
  • Laboratory calibration method for soil moisture sensors
  • Laboratory calibration method for soil moisture sensors

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Embodiment Construction

[0050] The technical solutions provided by the present invention will be described in detail below in conjunction with specific examples. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0051] In this example, the copper ring sensor is selected, and the signal range is a columnar area with a radius of 10cm and a height of 10cm. The soil container used in the present invention is a cylindrical container with a radius of 16.5cm and a height of 20cm. The outer radius of the conduit is 2.85cm, which meets the signal range of the copper ring sensor.

[0052] Step A, set the bulk density range to 1.40 ~ 1.57g / cm 3 , the volumetric water content range is 5% to 45%, and the set fitting points are 5%, 7%, 12%, 18%, 22%, 26%, 34%, 40%, and 43%. The points are 9%, 15%, 25%, 37%, and 44%, a total of 5 points. Among them, the bulk density of 5%, 7%, and 9%...

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Abstract

The invention discloses a laboratory calibration method for soil moisture sensors. After the volume weights and volume moisture contents of fitting point soil samples and verifying point soil samples are set, the soil samples are evenly mixed with water, next soil samples are made by recycling the made soil samples, the original measured frequency values of the soil moisture sensors are recorded in sequence at the same time, data is fit with Matlab software, and a calibration equation is obtained finally. By means of the calibration method, the calibration period can be shortened, and the workload can be reduced; besides, data output by the calibrated sensors finally is high in precision and small in error.

Description

technical field [0001] The invention relates to the technical field of moisture sensor calibration, in particular to a laboratory calibration method for a soil moisture sensor. Background technique [0002] The soil moisture sensor needs to be calibrated in the laboratory before leaving the factory. The previous laboratory calibration method needs to go through the process of drying soil, sieving soil, mixing soil, arousing soil, and compacting repeatedly. The time is long, resulting in a long calibration cycle and a large amount of labor. Contents of the invention [0003] In order to overcome the deficiencies of the above-mentioned prior art, the present invention provides a laboratory calibration method for a soil moisture sensor, which is used to overcome the defects of long calibration period and heavy labor load in the prior art. [0004] In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: ...

Claims

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Application Information

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IPC IPC(8): G01N5/04G01N33/24
CPCG01N5/045G01N33/246
Inventor 姜照军霍小波刘传军
Owner XIAN SITAN ENVIRONMENT TECH CO LTD
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