A system and method for detecting slippage of electric screw locking tools based on motor characteristics
A detection system and electric lock technology, applied in the testing of mechanical components, testing of machine/structural components, manufacturing tools, etc., can solve the problem of increasing tool volume, weight, inertia and complexity, high cost, changing the overall structure of tools, etc. question
Active Publication Date: 2020-12-15
SHENZHEN LOTUT INNOVATION DESIGN CO LTD
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Problems solved by technology
This system has two disadvantages: 1) the torque (moment) sensor is often costly; 2) the installation of the torque sensor will change the overall structure of the tool, increasing the volume, weight, inertia and complexity of the tool. Meet production needs
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Embodiment Construction
[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0018] refer to figure 1 , an electric lock screw tool slip detection system based on motor characteristics, including a motor 1, the current wire of the motor 1 is connected to the analog input terminal of the A / D converter 3, and the first digital output of the A / D converter 3 The port is connected to the signal input end of the buffer 5, the signal output end of the buffer 5 is connected to the second signal input end of the comparator 6, and the second digital output port of the A / D converter 3 is connected to the first signal output port of the comparator 6. The signal input terminal is connected, the signal output terminal of the comparator 6 is connected with the signal input terminal of the counter 7, and the signal output terminal of the counter 7 is connected with the signal input terminal of the alarm system 8 and the post-processing system 9;
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The invention provides an electric lock screw tool slip detection system and method based on motor characteristics. The system comprises a motor; a current wire of the motor is connected to an analoginput end of an A / D converter; a first digital output port of the A / D converter is connected to a second signal input end of a comparator through a buffer; a second digital output port of the A / D converter is connected with a first signal input end of the comparator; a signal output end of the comparator is connected with a signal input end of a counter; a signal output end of the counter is connected with signal input ends of an alarm system and a post-processing system; a motor switch is connected with the motor and a control end of a pulse generator; a first pulse output end of the pulse generator is connected with the A / D converter, the buffer, and an outer clock pulse input end of the comparator; a second pulse output end of the pulse generator is connected with the buffer, the comparator and a reset signal input end of the counter; and whether slip occurs or not is judged through the current change during the normal working of the motor. The electric lock screw tool slip detection system provided by the invention realizes the real-time detection and alarm of the slip, and has the advantages of being simple and low in cost.
Description
technical field [0001] The invention relates to the technical field of electric screw locking tool slip detection technology, in particular to a motor characteristic based electric screw locking tool slip detection system and method. Background technique [0002] Electric lock screw tools are often used in factory production. This tool uses the motor to drive the screwdriver head clamped by the fixture to rotate to achieve screw locking. Some of these electric locking screw tools look like hand drills, which are used manually by workers, and some are installed at the end of the manipulator as an automated tool. Whether it is manual or automatic, enterprises have found a pain point in the process of using it, that is, when using this tool to assemble screws, sometimes there will be slippery wires, and it is difficult to find such slippery wires during the installation process. If the slip wire is found and dealt with, the slip wire will cause poor assembly, which will seriou...
Claims
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IPC IPC(8): G01M13/00B23P19/06
CPCB23P19/06G01M13/00
Inventor 张宁刘会霞董浩浩
Owner SHENZHEN LOTUT INNOVATION DESIGN CO LTD