Constant rotation speed generating device for detecting elevator speed limiter tester

Abstract

The invention relates to a constant rotation speed generating device for detecting an elevator speed limiter tester. The constant rotation speed generating device mainly comprises a stepped motor control module, a microcontroller, a liquid crystal display module, a keyboard management module, a printer module and a communication module. The constant rotation speed generating device has an automatic testing work mode and a manual testing work mode, if the automatic testing work mode is selected, a plurality of rotation speed values can be set in one time of measurement, and when the set rotation speeds are generated, the set rotation speeds can be automatically and sequentially generated; if the manual testing work mode is selected, only rotation speed value can be set in one time. The constant rotation speed generating device further has the ability of communicating with a PC, the PC can be used for collecting and displaying the speed of the constant rotation speed generating device, and the constant rotation speed generating device has the advantages of being high in measuring precision, simple in structure, convenient to operate, and the like.

Description

technical field [0001] The invention specifically relates to a constant rotational speed generating device used for testing an elevator speed governor tester. Background technique [0002] The elevator speed limiter is a very important part of the elevator, and its health affects the safety and reliability of the elevator. The health status of the elevator speed limiter can be tested by the elevator speed limiter tester. At present, the elevator speed limiter tester is widely used. However, after a long period of use, the speed limiter tester may have problems such as a decrease in measurement accuracy or a decrease in sensor sensitivity. Therefore, it is necessary to regularly verify and calibrate the tester of the elevator speed limiter to ensure the availability of the tester of the speed limiter. At present, there are very few verification devices for elevator speed governor testers. [0003] In the verification device of the tester, the constant speed generation is t...

AI Technical Summary

Problems solved by technology

At present, the commonly used standard speed generating device is generally composed of a controller, a driver and a gearbox. A stepper motor is used as the main actuator motor, and the dynamic rotation of the stepper motor is controlled by an open-loop frequency conversion speed regulation method. In order to expand the speed range, The stepping motor speeds up or decelerates by driving a high-precision gear box, and outputs the corresponding standard speed on each output shaft of the gear box. The speed output accuracy is very high and the speed range is large, but the disadvantage of this method is The cost is high, the volume is large, and the weight is heavy, so it is inconvenient to carry; and, in the process of generating the standard preset speed (maybe more than one standard speed), the speed result that needs to be set cannot be generated at one time, and finally if you need to know the For the linear velocity of the belt wheel, a table corresponding to the rotational speed and linear velocity should be listed for secondary calculation, and the detection efficiency is not high.

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