Measurement device of diameter of plant stalk

Abstract

The invention relates to the field of agricultural engineering, in particular to a measurement device of the diameter of a plant stalk. The measurement device comprises a bracket, a light source and a photoresistance. The bracket comprises a surrounded wall and a valve which commonly define a measurement hole for the stalk of a plant to be measured to enter from the valve. The light source and the photoresistance are assembled on the bracket in a mutual contraposition mode and are arranged on two sides of measurement hole. A display screen is connected on the photoresistance through an analog-digital (A / D) conversion device. When the measurement device is used, at first, the valve is opened to ensure that the stalk of the plant to be measured is arranged inside the measurement hole along a radial direction and certain distance is kept between the plant stalk and the bracket; then the valve is closed, the light source is opened, light of the light source arrives at the surface of the photoresistance through gaps between the stalk and the bracket, and therefore lighting regions of the photoresistance differ, and the photoresistance correspondingly outputs different resistance values; and the resistance values are converted by the A / D conversion device and the diameter of the plant stalk is directly displayed on the display screen, precision is guaranteed in the measurement process and the stalk can be prevented from being damaged.

Description

technical field [0001] The invention relates to the field of agricultural engineering, in particular to a plant stalk diameter measuring device. Background technique [0002] In agricultural production, it is necessary to control irrigation, fertilization, pest control and other measures according to the growth status of plants. Traditional agricultural production mainly relies on human eye observation, and judges the growth status of plants based on the experience of producers. The accuracy of the data obtained in this way will vary from person to person and is inaccurate, which often leads to waste of water and fertilizer or untimely irrigation and fertilization. , ultimately affecting crop yields. In modern agriculture, various sensors are used to perceive the growth status of plants. Since the growth status of plants cannot be measured directly, the growth status of plants is monitored by indirectly measuring indicators that can characterize these changes. As an import...

AI Technical Summary

Problems solved by technology

Among the three, the accuracy of the vernier caliper measurement is not high, and it cannot be automatically monitored; when the contact linear displacement sensor is measured, it is necessary to apply an appropriate pre-tightening force to the plant, and the existence of this pre-tightening force affects the normal growth of the plant; computer vision image processing The measurement results of the technology are inaccurate and have the disadvantage of high cost

Images