Digital display outside micrometer triggered by piezoelectric ceramics

Abstract

The invention provides a digital display outside micrometer triggered by piezoelectric ceramics. The digital display outside micrometer comprises a ruler frame, and a measuring anvil, a micrometric screw, a left seat, a right seat, a slip ring rotor, a slip ring stator, a coding counting assembly and a digital display circuit system which are arranged on the ruler frame; the coding counting assembly comprises a movable grid and a fixed grid, the slip ring rotor and the movable grid are matched with a V-shaped sliding groove formed in the surface of the micrometric screw through micro clearance fit and jackscrews to form a synchronous rotary sliding pair, and the fixed grid is fixedly connected with the right seat; and a piezoelectric ceramic trigger head is arranged at the end of the micrometric screw, a corresponding piezoelectric ceramic circuit is electrically connected with the slip ring rotor through a wire in the micrometric screw, and the slip ring stator and the fixed gate are electrically connected with the digital display circuit system. The working mode of a traditional outside micrometer is changed, feeding and triggering are directly associated through piezoelectric ceramic triggering, and a force measuring point is in direct contact with a workpiece, so that the calibration positive force is consistent with the measurement positive pressure, the operation requirement is reduced, and the measurement precision and repeatability are greatly improved.

Description

technical field [0001] The invention relates to a digital display outer diameter micrometer. Background technique [0002] OUTSIDE MICROMETER, also known as spiral micrometer, is often referred to as "micrometer". It is a more precise length measuring instrument than a vernier caliper. The accuracy is 0.01mm, 0.02mm, and 0.05mm. With the addition of one digit for estimation, it can read to the third digit (thousandth) after the decimal point, so it is also called micrometer. [0003] The commonly used specifications of outer diameter micrometers are 0~25mm, 25~50mm, 50~75mm, 75~100mm, 100~125mm and so on. [0004] The structure of the outer diameter micrometer is composed of a fixed ruler frame 22, an anvil 23, a micrometer screw 11, a fixed sleeve, a micrometer cylinder 15, a force measuring device, a locking device and the like. There is a horizontal line on the fixed sleeve, and there is a row of scale lines with a spacing of 1 mm on the line and below the line, and th...

AI Technical Summary

Problems solved by technology

[0007] In the actual operation process, since the rotational feed speed of the operator may be different during calibration and measurement, the positive pressure converted to the contact surface of the micrometer screw 11 is different due to the inconsistency of the rotational inertia, resulting in measurement errors; correspondingly, High operating requirements for operators

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