Precaution and alarming method for combined harvester threshing cylinder plugging fault

Abstract

The invention relates to a precaution and alarming method for preventing a combined harvester threshing cylinder from plugging fault. In the method, two Hall sensors are used, one sensor is arranged on a belt pulley of an output power shaft, and the other sensor is arranged on an input power belt pulley of the threshing cylinder; transient impulse cycles of upper wave of the two wheels are synchronously measured to extract a first order difference, a second order difference, a relative speed ratio, a slip ratio, difference cumulative sum to as plugging fault portent characteristic quantity of transient impulse cycle; priority and weight are endowed on the characteristic quantity according to the contribution in identifying plugging fault; the three decisions of normal operation, plugging precaution and alarming are made on the premise of combining the plugging default portent characteristic standard model bank with judgment rules; sound and light are used for prompting the driver to carry out correct measurement in time. The invention has the advantages of automatically adapting to the forwarding speed and change of feeding quantity of the harvester, thus effectively preventing the combined harvester from plugging default to improve intelligent level and harvesting efficiency of the combined harvester and reduce loss caused by plugging.

Description

Technical field: [0001] The invention relates to a clogging fault early warning and alarm method of a combine harvester threshing cylinder, which is suitable for clogging fault diagnosis, fault early warning and alarm caused by feeding load changes and mechanical failures when the combine harvester is harvesting in the field. The method can be slightly modified and applied to the early warning and alarm of blockage faults in other parts of the combine harvester. Background technique: [0002] With the improvement of the degree of agricultural mechanization, the requirements for the informatization of agricultural machinery and equipment are also increasing. According to the operating characteristics of combine harvesters in our country, it is urgent to develop a state monitoring and fault diagnosis system. First of all, the socialized service system (cross-regional operation) has become one of the main forms of harvesting operations of combine harvesters, which objectively ...

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Problems solved by technology

According to the data (He Satellite, Zhang Ligong, Zhang Jixian, combine harvester fault warning device (P), utility model patent, application number: 97203354.8, publication number: CN2325968, date of issuance: 1999.04.15, main classification number: A01D73 / 00 ), at present the main method adopted for blockage alarm is speed monitoring. When the speed exceeds the rated range, an alarm signal is sent. Poor adaptability to active changes limits its application

Another method is to use the method of torque measurement. This method is more reliable in principle than only measuring the speed of the alarm. Promote on Combine Harvesters

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