System for measuring mass of heavy object lifted by motor by utilizing motor output power and method thereof

Abstract

The invention discloses a method for measuring mass of a heavy object lifted by a motor by utilizing motor output power. The method comprises the following steps: acquiring data of a heavy object with unknown mass in a lifting process, screening out data of a continuous effective data smooth segment of the motor in stable working with a speed close to a rated rotating speed, calculating total output power of the motor at a continuous position segment, and calculating the mass of the heavy object according to a functional relation obtained in advance between the mass of the heavy object and the total output power of the segment. According to the method and a system provided by the invention, a large error problem in a traditional measuring method can be solved, measurement is not easy to be influenced by an external factor, and a measurement result is comparatively objective.

Description

technical field [0001] The invention relates to a system and a method for measuring the quality of a heavy object carried by a motor, specifically a method and a method for comprehensively analyzing and judging the quality of a heavy object carried by the motor by measuring various parameters in the operation of the motor. Background technique [0002] The accurate calculation of the hoisting weight of the existing motor-driven hoisting equipment is difficult to achieve. The usual method is to use a tension sensor to measure. This technology is exactly the same as the principle of an electronic scale. After being subjected to external force, a corresponding signal is output, and the weight is measured according to the signal relationship. [0003] However, since the weight measured by the tension sensor is a static weight, and the sensor is easily disturbed by external factors such as vibration and environment, the measurement accuracy cannot be guaranteed. In addition, 3t ...

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Problems solved by technology

[0002] The accurate calculation of the hoisting weight of the existing motor-driven hoisting equipment is difficult to achieve. The usual method is to use a tension sensor to measure. This technology is exactly the same as the principle of an electronic scale. After being subjected to external force, a corresponding signal is output, and the weight is measured according to the signal relationship

[0003] However, since the weight measured by the tension sensor is a static weight, and the sensor is easily disturbed by external factors, such as vibration, environment and other factors, the measurement accuracy cannot be guaranteed

In addition, 3t and 5t sensors are usually used for 40T lifting equipment. It can be seen that the magnification of the sensor is very large, so a small disturbance will produce a large error, and the error can generally reach 3% to 5%.

[0004] In addition, the current method is commonly used in the prior art to deduce the mass of heavy objects, but due to the existence of problems such as grid voltage disturbances, the measured current may change suddenly, thereby affecting the measurement accuracy of such methods

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