A sampling machine control method and device

Abstract

The invention discloses a sampling machine control method and device. The method is characterized in that in the descending process of a sampling head, the position state of a sampling head is determined according to the torque of an ascending and descending motor; the descending speed of the ascending and descending motor and the rotating speed of the rotating motor are determined according to the position state. The method and the device have the advantages that the control is simple; the precision is high; the sampling accidents due to obstacle meeting by the sampling head in the sampling process can be effectively prevented; the safety of the sampling process is ensured, and the like.

Description

technical field [0001] The invention relates to the field of solid material sampling, in particular to a sampling machine control method and device, and is especially suitable for sampling control of coal samples. Background technique [0002] In the process of sampling and analyzing materials, it is first necessary to sample the materials through the coil device to obtain quantitative samples. Taking coal sampling as an example, when the sampling head of the car sampling machine descends to sample, it may encounter large rocks or steel bars in the coal, resulting in increased descending resistance and making it difficult for the lifting motor to continue downward. If the motor is blocked in the downward direction, it cannot be detected in time and the sampling head is forcibly lowered, which may cause mechanical damage to the sampling machine and the carriage, especially when the sampling head encounters the chassis of the carriage when it descends, the chassis of the carri...

AI Technical Summary

Problems solved by technology

Taking coal sampling as an example, when the sampling head of the car sampling machine descends to sample, it may encounter large rocks or steel bars in the coal, resulting in increased descending resistance and making it difficult for the lifting motor to continue downward. If the motor is blocked in the downward direction, it cannot be detected in time and the sampling head is forcibly lowered, which may cause mechanical damage to the sampling machine and the carriage, especially when the sampling head encounters the chassis of the carriage when it descends, the chassis of the carriage will be drilled through or the sampling machine will be jacked up ACCIDENT

[0003] When the motor load increases, the motor current increases and the motor speed slows down. In the industry, it is generally judged whether the motor is blocked by measuring the parameters of the lifting motor current or the motor speed, but there is a problem that the change trend of the collected data is not obvious, so it is also Unable to accurately judge the problem and deal with it in a timely manner

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