| 摘要 |
1,259,234. Combine harvester. F. WIENEKE and M. EIMER. 6 April, 1970 [5 April, 1969], No. 16124/70. Heading A1F. A threshing process control installation for a combine harvester in which the rate of threshing is automatically varied in response to the signal from a sensor on the crop elevator means, and the speed of harvester travel and concave cylinder gap, is automatically adjusted in response to variation in crop intake rate, or crop humidity or ingress of foreign bodies comprises a sensor 7 on the elevator 4 of the header responsive to crop intake rate which feeds a signal to a comparator 9, where it is combined with a signal from a speed sensor on the threshing cylinder 5, and an allisation in crop intake rate causes the cylinder speed to alter after a time delay equivalent to the time taken for the sensed crop to reach the cylinder plus the time taken for the cylinder to reach its new speed by delayer 12 and non linear amplifyer 13. A crop moisture sensor 16 feeds a signal to a summator 19 where it is added to a standard signal chosen for the type of crop on a console 18, the sum controlling the delay time, the range of increase or decrease of threshing rate and the concave gap to ensure optimum threshing conditions. The concave gap is measured by feeling elements 21 and altered by adjusting device 25 fed from a comparator 23 under the control of summator 19. The overall crop throughout is sensed by a torque sensor 26 on the threshing cylinder shaft which, under the control of summator 19 and console 18 alters the harvester ground speed via gear box 32 so that an increase in torque results in a slower speed. Raising the harvester header cuts out the control systems described above, and if the harvester threshing capacity is not used to optimum, a visual or audible signal is made on console 18 so the operator can reset the harvester ground speed. If foreign bodies are picked up and overload occurs, the throughput sensor 7 and torque sensor 26, via a limit transmitter 33 cause a visual signal to be set and after a time lag the threshing gap is set to maximum, and if the blockage is still present, the crop intake mechanism is stopped and the harvester halted. The installation may have hydraulic, pneumatic or preferably electronic analogue or digital control components. |
