Friction mechanics demonstration device

Abstract

The invention discloses a friction mechanics demonstration device comprising a support plate, a friction plate, an electric push rod and a friction body; the features are that the support plate top iswelded with a hinge block; the hinge block is hinged to the friction plate; the support plate has a groove; the electric push rod is arranged in the groove; the output end of the electric push rod ishinged to a connecting rod; the other end of the connecting rod is hinged to the bottom of the friction plate; a fixed block is arranged in the groove, and hinged to the middle of the connecting rod;the friction body top is provided with a wireless accelerometer; the friction body right end is provided with a wireless tension sensor. The demonstration device respectively uses the wireless accelerometer and the wireless tension sensor to measure the acceleration and the pulling force, thus reducing the test error; the friction plate tilt angle can be changed so as to realize multivariable influences on the friction force; the demonstration device uses a single chip to control the device and process the data, is strong in timeliness, small in error, and good in a demonstration effect.

Description

technical field [0001] The invention relates to the field of teaching equipment, in particular to a friction mechanics demonstration device. Background technique [0002] The friction mechanics experiment is an important part of the junior high school experiment. The key part of the experiment is to explore which factors are related to the size of the sliding friction force. However, the existing friction mechanics demonstration device has the following defects: 1. When doing the friction mechanics experiment, through People pull the spring dynamometer to make the object move in a straight line at a uniform speed, which is difficult to achieve in actual operation, resulting in errors in the experimental data; 2. The friction mechanics experiment is carried out on a horizontal plane, and generally only the pressure and pressure on the surface of the object can be tested. The impact of the roughness of the contact surface on the magnitude of the sliding friction, but this cann...

AI Technical Summary

Problems solved by technology

[0002] The friction mechanics experiment is an important part of the junior high school experiment. The key part of the experiment is to explore which factors are related to the size of the sliding friction force. However, the existing friction mechanics demonstration device has the following defects: 1. When doing the friction mechanics experiment, through People pull the spring dynamometer to make the object move in a straight line at a uniform speed, which is difficult to achieve in actual operation, resulting in errors in the experimental data; 2. The friction mechanics experiment is carried out on a horizontal plane, and generally only the pressure and pressure on the surface of the object can be tested. The impact of the roughness of the contact surface on the magnitude of the sliding friction, but this cannot test the relationship between the coefficient of dynamic friction and the inclination angle of the slope; 3. When doing the experiment, the experimental data needs to be artificially calculated and processed in the later stage to obtain the experimental results. The volume is relatively large, the demonstration effect is not good, and it is not real-time

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