Method for detecting pressure of bottom surface of granary and pressure sensor adopted by method

A pressure sensor and pressure detection technology, applied in the field of grain storage and grain detection, can solve problems such as low measurement accuracy

Active Publication Date: 2015-05-27
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for detecting the pressure on the bottom sur

Method used

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  • Method for detecting pressure of bottom surface of granary and pressure sensor adopted by method
  • Method for detecting pressure of bottom surface of granary and pressure sensor adopted by method
  • Method for detecting pressure of bottom surface of granary and pressure sensor adopted by method

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Embodiment 1

[0036] Figure 6 (a), (b) is a type of sensor applying the concept of the present invention, (a), (b) represent the use of two different elastic pads. In FIG. 6 , the pressure sensor includes a housing 11 and a sensitive diaphragm 12 , and the sensitive diaphragm 12 is provided with an elastic pad. The sensitive diaphragm 12 is a planar diaphragm with a flat top surface, and the elastic pad is closely attached to the top surface of the sensitive diaphragm; the top surface of the elastic pad is flat. In Fig. 6(a), the width of the elastic pad 15 is larger than that of the sensitive diaphragm, and in Fig. 6(b), the width of the elastic pad 16 is equal to that of the sensitive diaphragm.

[0037] The thickness of the elastic pad should be 4-6mm. Resilient pads can be realized by mounted resilient pads or with resilient coatings. The elastic material can be selected from rubber, such as neoprene.

Embodiment 2

[0039] The pressure sensor includes a housing 13 and a sensitive diaphragm 14, and the sensitive diaphragm 14 is provided with an elastic pad. An annular groove is formed on the top surface 14 of the sensitive diaphragm, and the elastic pad fits with the annular groove; the top surface of the elastic pad is flat. The thickness of the elastic pad should be 4-6 mm; the distance between the side of the elastic pad and the ring groove is 1 mm.

[0040] In Fig. 7(a), the width of the elastic pad 15 is larger than that of the sensitive diaphragm, and in Fig. 7(b), the width of the elastic pad 16 is equal to that of the sensitive diaphragm.

[0041] The method for detecting the pressure on the bottom surface of the granary using the above-mentioned pressure sensor at least includes the following steps:

[0042] Calibrate the pressure sensor to obtain a model and a calibration coefficient of the relationship between the sensor output value and the pressure;

[0043] The pressure sen...

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Abstract

The invention relates to a method for detecting the pressure of the bottom surface of a granary and a pressure sensor adopted by the method. The pressure sensor which is used for detecting the pressure of the bottom surface of the granary comprises a casing and a sensitive diaphragm, wherein an elastic cushion is arranged on the sensitive diaphragm. The method for detecting the pressure of the bottom surface of the granary adopting the pressure sensor comprises the following steps: calibrating the pressure sensor, obtaining a relational model of an output value of the sensor and the pressure and a calibration coefficient, and using the pressure sensor to detect the pressure of the bottom surface of the granary. According to contact characteristics between the sensitive surface of the pressure sensor and the bottom surface of a grain pile and an influence rule of a contacting state on the output value of the pressure sensor, the method in which the elastic cushion is additionally arranged between the sensitive surface of the pressure sensor and the bottom surface of the grain pile to improve the pressure detection accuracy of the bottom surface of the granary is provided by the invention, and the method has the characteristics of being convenient for use and maintenance, convenient for calibrating of the sensor and the like.

Description

technical field [0001] The invention belongs to the field of granary detection and relates to granary storage, in particular to calculating storage through granary bottom pressure, and in particular to a granary bottom pressure detection method and a pressure sensor adopted therefor. Background technique [0002] Food security includes quantity security and quality security. The research and application of online grain quantity detection technology and system is an important guarantee technology for national grain quantity security. Carrying out research and application in this area is related to national food security, which is of great significance and will generate huge social and economic benefits. [0003] The difficulty in the online detection technology and system of grain quantity lies in the pressure detection of the bottom surface of the granary. When using the existing pressure sensor to detect the pressure of the bottom surface of the granary, the detection error...

Claims

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Application Information

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IPC IPC(8): G01G17/00
Inventor 张德贤李磊费选金广锋王洪群张庆辉张苗刘灿杨铁军张元
Owner HENAN UNIVERSITY OF TECHNOLOGY
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