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Pressure sensor

A pressure sensor and sleeve technology, applied in the field of sensors, can solve the problems of stability, consistency and reliability limitations, and unsuitable grain granular pressure measurement.

Inactive Publication Date: 2013-09-11
王录民
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing pressure sensors are mainly used for geotechnical engineering testing, and are more biased towards qualitative monitoring. Due to the limitations of their stability, consistency and reliability, they are not suitable for pressure measurement of granular grains

Method used

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] As shown in the accompanying drawings, the present invention is a pressure sensor suitable for granular grains, including a bottom plate 1, a side plate 2, a sleeve 3, a spring 4, a sliding resistor 5, a steel clip 6, a cast iron pipe 7, a wire 8, Air duct 9, digital voltmeter 10, pin shaft 11, screw 12, guide rod 13, top plate 14, latex sheet 15, clamp 16, the top plate 14 bears the vertical grain pressure, causing the spring 4 to deform downward, driving the guide rod 13 moves downward, causing the resistance value of the sliding resistor 5 to change, and the voltage signal to change, thereby realizing pressure sensing.

[0016] As shown in the drawings, the bottom plate 1 is welded together with three side plates 2 to form a cube with an upper surface and a side opening. The sleeve 3 and the pin shaft 11 are processed by tooling, and the sleev...

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Abstract

The invention relates to a pressure sensor which is applicable to grain pressure testing and belongs to the field of sensors. The pressure sensor comprises a bottom plate, side plates, sleeves, springs, a sliding resistor, pin shafts, a guiding rod and a top plate, wherein the bottom plate and the side plates are welded into a whole and form a cube which is provided with an opening formed in the upper surface, the sleeves are fixed on the upper surface of the bottom plate, each spring is installed outside one sleeve, the pin shafts and the guiding rod are fixed on the lower surface of the top plate, the pin shafts are matched with the sleeves, the top plate can move upwards and downwards, and the sliding resistor is fixed between the bottom plate and the top plate. The springs are deformed after the pressure of grain acts on the top plate of the sensor, the top plate moves downward to drive the guiding rod to move downward, the resistance value of the sliding resistor is changed, a voltage signal is changed, and therefore pressure sensing can be achieved. According to the pressure sensor, the theory of large deformation of the springs is utilized, the bearing area is large, and the grain granular mixtures can uniformly and effectively act on the bearing surface of the sensor. The pressure sensor has the advantages of being simple in structure, good in stability, high in reliability, good in durability and low in cost.

Description

technical field [0001] The invention relates to a pressure sensor suitable for granular grains, belonging to the technical field of sensors. Background technique [0002] Grain pressure is an important data for the design of granary structure and grain transportation equipment. The calculation basis of grain pressure in the current specification is mainly the Janssen formula (proposed by German scholar Janssen in 1895) and the traditional soil pressure calculation theory. Ruler or field actual test test is less. Grain is a typical bulk granular material, and the pressure at the bottom of the grain pile is affected by factors such as the friction force of the granary wall and the internal friction force of the grain, and has continuous medium characteristics different from solid and liquid; at the same time, according to the requirements of the grain storage process, Grain needs to be fumigated and ventilated during storage, so the sensors used for grain pressure testing hav...

Claims

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Application Information

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IPC IPC(8): G01L1/20
Inventor 王录民许启铿揣君阎磊王志山王振清付晓炎陈亚霖刘永超郭明利袁庆利戚迎花
Owner 王录民
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