Simple measuring device capable of accurately measuring slab thickness of floor slab

Abstract

The invention relates to a measuring device, in particular to a simple measuring device that can accurately measure the thickness of a floor slab, can be accommodated, and can be automatically and easily retracted. The rod is hinged at the bottom of the vertical rod. When the rotating rod is in contact with the bottom of the floor slab, the horizontal plane of its contact is aligned with the zero scale on the vertical rod, including a sliding rule, which is sleeved outside the vertical rod and can be moved along the vertical rod. The rod reciprocates, and an angle meter is set on the slide rule. The vertical rod cooperates with the universal level on the angle meter to measure holes with a large hole slope, which makes the measuring instrument more practical. A mirror with a magnifying glass is installed on the slide rule. Barrel, which greatly facilitates reading; a magnet is ingeniously arranged between the vertical bar and the horizontal bar, which can easily keep the measuring instrument vertical after the measurement is completed, so that the instrument can be taken from the hole, which shortens the measurement time; due to the frequency of use of the measuring instrument The reason for the low height is that the present invention has a storage function designed to prevent damage to a large extent.

Description

technical field [0001] The invention relates to a measuring device, in particular to a simple measuring device which can accurately measure the thickness of floor slabs, can be accommodated, and can be automatically and easily retracted. Background technique [0002] In the construction inspection and acceptance process of construction projects, in order to ensure that the thickness of the floor slab meets the design and specification requirements, it is necessary to measure the thickness of the floor slab. [0003] Generally, there are two methods for measuring plate thickness: one is an electronic instrument that uses the combination of electromagnetic wave kinematics and dynamics. When using it, two people are needed, one is upstairs, and the other is downstairs. Standing against the transmitter, the people upstairs have to use communication and mine-sweeping methods to make the receiver and transmitter in the same center to measure. Obviously, the efficiency is not high....

AI Technical Summary

Problems solved by technology

[0003] Generally, there are two methods for measuring plate thickness: one is an electronic instrument that uses the combination of electromagnetic wave kinematics and dynamics. When using it, two people are needed, one is upstairs, and the other is downstairs. Standing against the transmitter, the people upstairs have to use communication and mine-sweeping methods to make the receiver and transmitter in the same center to measure. Obviously, the efficiency is not high. Although the accuracy is high, due to the expensive equipment and the thickness of the measuring board The reason for the low frequency of use (generally construction sites are centralized one or two measurements is enough), and it is rarely popularized;

[0004] The second is to use the original method to drill holes on the floor or use PVC pipes to reserve measuring holes. The former can be imagined. Because the steel bars in the floor are dense, encountering steel bars in the process of drilling is tantamount to futile work. The latter is always tilted when pouring concrete, so the measuring hole is basically not a theoretical vertical hole, but a hole with an inclined angle. The traditional measurement is to support a steel plate at the bottom of the hole, and then use a tape measure to stretch it out. Measure in the hole, because the

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