Method for measuring existence of powdery materials in specific material position of container and implementation material level switch thereof

Abstract

The invention discloses a method for measuring the existence of powdery materials in a specific material position of a container and an implementation material level switch thereof. The material level switch is a non-contact type ultrasonic material level switch and is implemented at a material level detection point of the container, detection ultrasonic waves are discontinuously emitted to the container in the production operation according to the set time interval in a direction vertical to the axial line of the container from a position outside the wall surface of the container, the obtained reflection echo signals of the interface between the inner wall surface of the container and media inside the container is subject to intensity comparison with the pre-measured calibration echo signals of the interface between the inner wall surface of the container and the media inside the container stored in a memory when the powdery materials are added into or not added into the container, and whether the powdery materials exist in the material level detection point of the sealed container or not is judged, so the detection and the control on the specific material level of the powdery material container are realized. The method belongs to the technology for carrying out material level detection in a way without contacting the powdery materials in the container, and has the advantages that the detection results are reliable, the service life of the material level switch used as a detection device is long, and the like.

Description

technical field [0001] The invention relates to material level detection technology, in particular to a method and device for non-contact detection of powder material level in an airtight container. Background technique [0002] In many industrial productions, raw materials, semi-finished products, and finished products are granular or powdery materials, and their material levels usually need to be detected. Especially for airtight containers loaded with powder materials, such as cement silos and mineral powder silos in concrete mixing plants, the material levels of these silos need to be monitored at any time during use, and usually at least the upper and lower limit material levels must be detected , if the material level is lower than the lower limit material level, the material in the silo is too small and needs to be added, otherwise it may cause a lack of powder materials in production and affect the normal production. If the material level is higher than the upper li...

AI Technical Summary

Problems solved by technology

[0021] Aiming at the problems of unreliable detection results and short service life of the detection device existing in the prior art powder material airtight container material level detection technology, the i

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