A vernier caliper capable of effectively reducing Abbe error and its measuring method

Abstract

The invention discloses a vernier caliper capable of effectively reducing Abbe errors and a measuring method, which comprises a main ruler and a vernier ruler. The upper and lower ends of the front side of the vernier ruler are provided with flanges to form a main ruler accommodating groove, and the main ruler is arranged on the main ruler. The vernier scale is slidingly connected with the main scale in the scale accommodation groove, and pressure sensors are arranged symmetrically along the front and rear directions in the main scale accommodation grooves at the upper and lower ends. The pressure sensing device is used to collect the pressure signal generated by the main scale against the vernier scale. The signal output end of the pressure sensing device is connected to the signal input end of the processing module, and the signal output end of the processing module is connected to a display device; the processing module is used to receive the pressure signal input by the pressure sensing device, and perform signal processing on the pressure signal before calculating The differential pressure signal value used to represent the parallelism between the main line of the vernier scale and the main line of the main scale is obtained. The invention can solve the problems of large Abbe error and low measurement accuracy in the use process of the existing vernier caliper.

Description

technical field [0001] The invention relates to a measuring tool, in particular to a vernier caliper capable of effectively reducing Abbe errors. Background technique [0002] In the conventional measuring tool industry, common vernier calipers are divided into three types: mechanical vernier calipers, dial vernier calipers and digital display vernier calipers. The mechanical vernier caliper is composed of a main ruler, a vernier ruler, a ruler body, and measuring claws. It is widely used in the field of machinery manufacturing because of its convenient use and good measurement stability. The vernier caliper with watch is based on the mechanical vernier caliper. It uses the rack drive gear to drive the pointer to display the value. The digital display vernier caliper is based on the vernier caliper with a table, using the rack to drive the circular grid to rotate, and using the photoelectric pulse counting principle to convert the linear displacement of the caliper claw int...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a vernier caliper that can effectively reduce the Abbe error, which can solve the problems of large Abbe error and low measurement accuracy in the use process of the existing vernier caliper

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