Digital display measuring equipment

Abstract

The invention discloses a numerical display measurement device for measuring, including a large number measuring amount device, of which the measure range is the measure range of the whole numerical display measurement device. The large number measuring amount device can roughly divide the measure range of the whole numerical display measurement device into a plurality of small measure sections and can calibrate the position of every small measure section onto every small measure section one by one. The invention also includes a small number measuring amount device, of which the measure range is larger than the largest small measure section. The invention still includes a calculation device, which calculates the total measuring result according to the measuring amounts of the large number measuring amount device and the small number measuring amount device. The invention is best suitable for being used in a numerical display scale. The large number measuring amount device of the numerical display scale is a capacitance sensor for sensing the depths of varied deep grooves, which are solidified in the scale with same intervals. The small number measuring amount device of the numerical display scale is a percent meter for sensing the moving distance of a scale frame clamping jaw within the intervals of the grooves. The invention divides the measuring amount into large numbers and small numbers for accumulation account, which makes the absolute measurement realized.

Description

(1) Technical field: [0001] The invention relates to a measuring tool, specifically a digital display measuring device. (2) Background technology: [0002] The existing general digital display measuring device adopts a spatial displacement sensor. If the measurement accuracy of this digital display measuring device is high, the response speed is slow; if the response speed is fast, the measurement accuracy must be reduced. Therefore, the existing digital display measurement device cannot meet the requirements of both fast and accurate measurement. [0003] In addition, the existing digital display measuring devices all use incremental sensors, so errors are likely to occur due to interference from external signals during measurement. [0004] Furthermore, the measurement range of a digital display measuring device using a capacitance sensor is often larger than 1 / 2 pitch of the capacitance grid, so its measurement and spatial position are not absolute measurements corresponding t...

AI Technical Summary

Problems solved by technology

[0007] 1. The traditional digital caliper is a relative measurement beyond a 1 / 2 pitch, rather than an absolute measurement, so the one-to-one relationship is unstable. When the moving speed of the ruler frame on the ruler is accelerated, the capacitive sensor is too late Perceive the number of pitches passed, and the displayed distance data is biased

[0008] 2. It is also because the traditional digital caliper is relative measurement beyond one pitch, and its requirements on the environment are relatively high. For example, the instantaneous electric pulse in the surrounding environment will cause inaccurate measurement structure

[0009] 3. Then there is the sealing problem of traditional digital calipers. When the conductive medium invades between the moving and fixed grids, it will not work normally.

However, the movable grid or the fixed grid on the ruler body is exposed and cannot be sealed, and the effect of complete sealing cannot be achieved.

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