Apparatus and method for monitoring impurity rate and breakage rate of grains in grain-bin of harvester

An apparatus for monitoring impurity rate and breakage rate of grains in a grain-bin of a harvester, comprising:

• a grain-weighing box, and an impurity box is provided on a first side of the grain-weighing box, a weighing sensor and a fixing plate being capable of rotating are both provided in the grain-weighing box and the impurity box, a bearing plate is arranged between the fixing plate and the weighing sensor, the impurity rate may be calculated by detecting masses of the grains and impurities, a collecting box is arranged at a lower part of the grain-weighing box, and a Geneva conveying mechanism is arranged at a bottom of the collecting box;
• a conveying belt, being arranged below the Geneva conveying mechanism, and an industrial camera is arranged at a tail end of the conveying belt;
• a spread scraper is arranged above a portion of the conveying belt between the industrial camera and the Geneva conveying mechanism, so that the industrial camera may carry out mono-layer breakage detection on the grains;
• and
• a sieving mechanism, comprising an arc-shaped impurity-removing sieve arranged above the grain-weighing box, and a combing mechanism is arranged above an end of the impurity-removing sieve for spreading a grain mixture on the impurity-removing sieve and discharging the impurities on the impurity-removing sieve into the impurity box;
• wherein,
• the grain-weighing box, the impurity box, the sieving mechanism and the conveying belt are mounted inside a housing, an opening is provided on a top of the housing, and a temporary storage box is arranged at the opening;
• the temporary storage box is positioned right above the sieving mechanism, and the temporary storage box comprises a turnover plate positioned at a bottom thereof, an electromagnetic fixing pin is provided on one side of the turnover plate, a full-position switch is provided on an inner wall of the temporary storage box, and when the grains reach a full position, the turnover plate is driven to rotate by a drive motor on the temporary storage box, and the grains are discharged downward to the sieving mechanism;
• a fan is arranged on a side surface of the housing and corresponding to the impurity-removing sieve, a tail end of the impurity-removing sieve is arranged close to the impurity box, and a retractable baffle plate is arranged at the tail end of the impurity-removing sieve;
• and
• the conveyor belt is arranged transversely and a front end of the conveyor belt is arranged below the Geneva conveyor mechanism, and the grains are intermittently output to the conveyor belt through the Geneva conveyor mechanism;
• after passing through the spread scraper, the grains distributed at intervals are spread into a mono-layer distribution state;
• and, in an image acquisition process, a camera triggering cycle is configured to be equal to a time required for the grains to move along a boundary length of a camera field of view, to avoid overlapping or missing images in acquired images.