A long-necked automatic telescopic measuring rod

Abstract

The invention discloses a long-neck automatic telescopic measuring rod. The long-neck automatic telescopic measuring rod comprises a telescopic rod; the telescopic rod comprises at least two layers of hollow casing pipes nested with each other, wherein the outset layer casing pipe is fixed, and the rest layer casing pipes are designed to be telescopic; expansion of the casing pipes is realized via a following structure: a metal rod is arranged at the center of the telescopic rod, the top of the metal rod is connected with a stepping motor, the stepping motor is used for driving a gear, and meshing of the gear with racks on the internal walls of the casing pipes is realized; a spring rod is arranged at the center of the telescopic rod; the spring rod is used for supporting and pulling the metal rod so as draw the gear towards the racks; the stepping motor is controlled by a control circuit, automatic step counting can be realized, and measuring is realized. The long-neck automatic telescopic measuring rod possesses both automatic telescopic function and measuring function, the length of the telescopic rod is adjustable, free expansion is achieved, the long-neck automatic telescopic measuring rod is portable, and both measuring and displaying can be realized.

Description

technical field [0001] The invention relates to a telescopic rod, in particular to a long-necked rod capable of free telescopic measurement. Background technique [0002] At present, there are many places where telescopic poles are applied, such as altimeters, photographic stands, poles for the blind, etc. all use the telescopic principle. The telescopic rod is widely used in life and work because it has the characteristics of small shrinkage volume, easy to carry and store, and can meet the requirement of use length when unfolded. When users need to use it, they stretch it to a certain length, and when they do not need to use it, they retract it, which can effectively achieve the effects of small size, flexible use, and convenient portability. Tree height is a necessary factor to measure forest volume and biomass. In forest measurement, tree height is generally measured with altimeters. The measurement principles of these altimeters are generally based on the principle of ...

AI Technical Summary

Problems solved by technology

Regardless of the structure, the extension and retraction of the telescopic rod must be manually operated, and the required length of the telescopic rod needs to be adjusted repeatedly during use. The degree of automation is not high, so it is inconvenient to use time-consuming and laborious

In addition, the telescopic length of the rod cannot be automatically calculated.

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