First point positioning high-accuracy electric spark dotting timer

Abstract

The invention provides a first point positioning high-accuracy electric spark dotting timer which comprises a shell, a power module, a single-chip microcomputer, a function partition potentiometer, anelectric spark high-voltage generator, an electromagnet and a boosting adjustment module are further arranged in the shell, and a display screen is arranged outside the shell. The power module is electrically connected with the single-chip microcomputer, the function partition potentiometer, the electric spark high-voltage generator, the electromagnet and the boosting adjusting module through circuits, and circuit pins are arranged on the single-chip microcomputer and electrically connected with the display screen, the function partition potentiometer, the electric spark high-voltage generator and the electromagnet. A computer control program is arranged in the single-chip microcomputer, high-voltage driving is carried out through the computer control program, the spray point is driven bythe electric spark high-voltage generator to carry out dotting, the shell is further provided with a powdered ink paper disc and the spray point, and high voltage is changed by adjusting the voltageof a power source. And the influence of residual magnetism on the positioning accuracy of the first point is reduced through an electromagnet double-control circuit.

Description

technical field [0001] The invention relates to the technical field of teaching instruments, in particular to an electric spark striking timer with high accuracy of first point positioning. Background technique [0002] At present, middle school physics experiments use electric spark timers when studying the motion of objects on the mechanical track. The input power is 50Hz alternating current, and the cycle of sparks generated by the timer is 20ms. Calculation of the acceleration when the movement speed is high, but the calculation of the acceleration at a low movement speed will produce a large error; there are many ways to improve the accuracy of the dot timer, such as using quartz crystal oscillation as the output pulse signal source; for example, through Change the data processing method, such as using the least square method for fitting calculation; for example, to improve from the aspect of automation; for example, by changing the fixed method, such as replacing the o...

AI Technical Summary

Problems solved by technology

At present, an EDM timer with adjustable frequency has been developed with a single-chip microcomputer to solve the problem of acceleration calculation errors in low-speed motion, but this EDM timer still cannot solve the problem of large positioning errors at the first point where the initial velocity is zero.

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