Abstract
A louver position sensing system for a sieve and chaffer of a combine harvester. One system provides that at least one sensor is in actual, physical contact with one or more louvers of the sieve and chaffer. Another system provides that a one or more magnet holders are mounted on louvers and, spaced away, sensors sense magnets in the magnet holders to determine the rotational position of the louvers. Either system allows for accurate, on-the-fly adjustment of the louvers in order to maximize the efficiency of operation of the sieve and chaffer. Preferably, the sensing systems are configured such that sensed position of the louvers is broadcast on the CAN bus of the combine harvester. As a result, the position information can be used to dynamically adjust the openings between the louvers of the sieve and chaffer to achieve more efficient grain cleaning as the machine and field variables change.
Claims
1. A louver position sensing system for a sieve and chaffer of a combine harvester, said sieve and chaffer comprising at least one louver and at least one divider, said louver position sensing system comprising at least one magnet holder which is in actual, physical contact with said at least one louver, said magnet holder having at least one magnet therein, and a housing having a sensor therein, said sensor configured to sense the at least one magnet in the magnet holder.
2. A louver position sensing system as recited in claim 1, wherein the sieve and chaffer comprises at least one divider, and wherein said at least one sensor is mounted to said at least one divider.
3. A louver position sensing system as recited in claim 1, wherein the sieve and chaffer comprises a divider, wherein the housing is mounted to the divider.
4. A louver position sensing system as recited in claim 1, wherein the sensor comprises a hall effect sensor which is inside the housing and which is configured to sense the at least one magnet which is in the magnet holder.
5. A louver position sensing system as recited in claim 1, wherein the sensor comprises a hall effect sensor which senses a position of the at least one magnet in the magnet holder, further comprising electronics, wherein the electronics is configured to use the hall effect sensor to determine a rotational position of the louver to which the magnet holder is mounted.
6. A louver position sensing system as recited in claim 1, wherein a cable extends from the housing and communicates a position of at least one louver back to the vehicle host controller.
7. A louver position sensing system as recited in claim 1, wherein an output is either broadcast to a CAN bus of the combine harvester or transmitted directly to a controller of the combine harvester.
8. A louver position sensing system as recited in claim 7, further comprising at least one sieve linear actuator that is connected to the bus and at least one adjustment bar of the sieve and chaffer.
9. A louver position sensing system as recited in claim 8, wherein a plurality of sensors and sieve linear actuators are connected to the bus, wherein multiple sensors are connected to each sieve and chaffer, and wherein each adjustable area of the sieve and chaffer utilizes an independent sensor.
10. A louver position sensing system as recited in claim 1, wherein there are a plurality of magnet holders mounted on louvers, and there are a plurality of sensors spaced away from the magnet holders.
11. A louver position sensing system as recited in claim 10, further comprising electronics configured to process multiple sensor inputs and output multiple position information to a CAN bus of the combine harvester or transmitted directly to a controller of the combine harvester.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The organization and manner of the structure and operation of the invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawings wherein like reference numerals identify like elements in which:
[0015] FIG. 1 is a top view of a standard sieve and/or chaffer construction;
[0016] FIG. 2 provides a perspective view of the sieve/chaffer shown in FIG. 1, omitting parts of the frame so other components can be more easily seen;
[0017] FIG. 3 illustrates a conventional visual louver position indicator;
[0018] FIG. 4 shows a sensor mounted to a divider of a sieve and chaffer, in accordance with one embodiment of the present invention;
[0019] FIG. 5 is a side view of the sensor mounting arrangement shown in FIG. 4 (omitting two sieve louvers for clarity);
[0020] FIG. 6 is a bottom view of the sensor mounting arrangement shown in FIGS. 4 and 5;
[0021] FIG. 7 provides a simplified view of the inside of the sensor shown in FIGS. 4-6;
[0022] FIG. 8 is similar to FIG. 7, but provides an exploded view;
[0023] FIG. 9 illustrates one possibility of a system architecture with which the sensor shown in FIGS. 4-8 can be employed;
[0024] FIG. 10 illustrates an alternative embodiment of the present invention, specifically a perspective view showing a magnet holder mounted directly to a louver and a sensor mounted on a divider of a sieve and chaffer;
[0025] FIG. 11 is similar to FIG. 10, but provides a side view showing a gap between the magnet holder and the sensor;
[0026] FIG. 12 is a schematic view showing the employment of two sensors and electronics configured to determine the rotational position of two louvers;
[0027] FIG. 13 shows an electromechanical actuator being used to adjust a louver adjustment mechanism, ultimately adjusting the rotational position of the louvers; and
[0028] FIG. 14 illustrates one possibility of a system architecture with which either sensor systemi.e., either the system shown in FIGS. 4-6 or the system shown in FIGS. 10-12can be used along with the electromechanical actuator shown in FIG. 13.
DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS
[0029] While this invention may be susceptible to embodiment in different forms, there are shown in the drawings and will be described herein in detail, specific embodiments with the understanding that the present disclosure is to be considered an exemplification of the principles of the invention, and is not intended to limit the invention to that as illustrated.
[0030] An embodiment of the present invention provides a louver position sensing system for a sieve and chaffer of a combine harvester. The system provides that at least one sensor is in actual, physical contact with one or more louvers of the sieve and/or chaffer. As shown in FIGS. 4-6, the sensor 40 is preferably mounted to one of the dividers 16 of the sieve and chaffer 10 (see FIGS. 1 and 2). Preferably, the sensor 40 comprises a housing 42 which is mounted to the divider 16 via one or more fasteners 44 (or via other means), and a sensor probe 46 extends from the housing 42 and is actually, physically connected to one of the louvers 14 via a sensor coupling 48. As shown in FIGS. 4 and 6, the sensor coupling 48 may comprise a first component 50 connected to the end of the sensor probe 46, a second component 52 connected to a windvane of one of the sieve louvers 14, and a connecting member 54 (such as a pin) which links the first component 50 to the second component 52. Of course, other sensor coupling configurations can be used to connect the sensor probe 46 to the louver 14.
[0031] FIGS. 7 and 8 show inside the sensor housing 42. As shown, a hall effect sensor 56 is preferably inside the housing 42 for effectively sensing a cylindrical magnet 58 secured within the sensor probe 46. Preferably, the probe 46 is manufactured from a non-magnetic material and is free to travel linearly within the sensor housing 42. The hall effect sensor 56, via the magnet 58, senses the linear position of the sensor probe 46 and, as a result, the rotational position of the louver 14 to which the sensor probe 46 is connected via the sensor coupling 48. As the louver 14 is opened and closed via an adjustment system, such as an electromechanical motor or some other means, the coupling system translates the louver rotation to linear motion. This linear motion displaces the probe 46 within the sensor housing 42. The hall effect sensor 56 senses the position of the magnet 58 housed within the probe 46.
[0032] Electronics 60 are also provided inside the housing 42, such as one or more integrated circuits 62 on a printed circuit board 64, which are connected to the hall effect sensor 56, for determining the rotational position of the louver 14, via the hall effect sensor 56. A cable 66 extends from the housing 42 and, as shown in FIG. 9, effectively communicates the position of the louver 14 (e.g., the linear position of the sensor probe 46) back to a host controller 68 of the combine harvester via the vehicle CAN bus 70. The electronics 60 within the sensor housing 42 is configured to translate the probe's linear motion into an output suitable to be interpreted by the host controller 68. This output can be expressed in a number of ways (i.e., change in distance between louver teeth, angle, mVdv, etc.) and can be broadcast to the CAN bus 70 of the combine harvester or transmitted directly to a controller of the combine harvester. The electronics 60 provided inside the sensor housing 42 may include additional sensors integrated onto the printed circuit board 64, such as one or more accelerometers, temperature sensors, moisture sensors, wireless transmitters, etc., thereby allowing additional functionality of the overall sensor output to the host controller 68 of the combine harvester.
[0033] As shown in FIG. 9, a sieve linear actuator 72 can also be connected to the bus 70 (as well as to an adjustment bar 22 (see FIGS. 1 and 2) of the sieve and chaffer 10). In fact, more than one sensor 40 can be connected to the bus (as represented by dots 74) and more than one sieve linear actuator 72 can be connected to the bus (as represented by dots 76). Because sieves and chaffers are loaded differently depending on their position within the cleaning shoe of the combine harvester, an embodiment of the present invention provides that multiple sensors are connected to each sieve and chaffer to allow for accurate sieve and chaffer opening measurements while crop loading differs across the sieve and chaffer. Additionally, because some sieves and chaffers have multiple adjustments means (i.e., multiple adjustment bars), preferably each adjustable area of the sieve and chaffer utilizes an independent sensor, thereby allowing for more precise differential opening opportunities. In other words, the different sections of a single sieve and chaffer can have different sized louver openings, detected by different sensors and changed using different linear actuators, all part of the same system.
[0034] FIGS. 10 and 11 illustrate an alternative embodiment of the present invention. As shown, instead of providing a sensor probe 46 (see FIGS. 7 and 8, for example), which extends out of a housing 42 of a sensor 40, the system 100 shown in FIGS. 10 and 11 provides that a magnet holder 102 houses at least one magnet 104 and is mounted directly to a louver 14. A sensor 140 is spaced away from the magnet holder 102 (see the gap 157 shown in FIG. 11), preferably mounted on one of the dividers 16 (see FIGS. 10 and 11). The sensor 140 provides a housing 142 in which is disposed a sensor, such as a hall effect sensor 156 (much like the hall effect sensor 56 shown in FIG. 7) (see FIG. 12 which shows the hall effect sensor 156 of sensor 140). The hall effect sensor 156 in the housing 142 senses the location of the at least one magnet 104 inside the magnet holder 102, and preferably electronics 160 in the housing 142 (see FIG. 12) uses the hall effect sensor 156 to effectively determine the rotational position of the louver 14 to which the magnet holder 102 is mounted.
[0035] As shown in FIG. 12, a second magnet holder 202 may be mounted directly on a different louver 14a of the sieve and chaffer, and a second sensor 240, which preferably includes a housing 242 which houses another hall effect sensor 256, senses the location of at least one magnet in the second magnet holder 202. Preferably, the second sensor 240 is connected to the first sensor 140 (via cable 165), and preferably the electronics 160 is configured to calculate the rotational positions of both louvers 14, 14a to which the magnet holders 102, 202 are mounted. Preferably, the electronics 160 is configured such that it can process the position signal of the hall effect sensor 156 of the first sensor 140 and the position signal of the hall effect sensor 256 of the second sensor 240, thereby allowing the second housing 242 to omit complicated electronics in the housing 240 while still enabling the electronics 160 of the first sensor 140 to use the second hall effect sensor 256 to sense the rotational position of the louver 14a to which the magnet holder 202 is mounted. Still additional sensors can be provided (represented by the dots 340 shown in FIG. 12), as well as additional magnet holders mounted on more louvers (represented by the dots 302 shown in FIG. 12) of the sieve and chaffer, wherein the electronics 160 uses all the sensors to determine the rotational positions of the different louvers to which magnet holders are mounted.
[0036] Regardless of which system is employedi.e., either the system shown in FIGS. 4-6 wherein a sensor probe 46 is actually, physically connected to one of the louvers 14, or the system shown in FIGS. 10-12 wherein one or more magnet holders 102, 202, etc. are mounted to louvers and one or more spaced away sensors 140, 240, etc. performs the sensing of the rotational position(s) of the louver(s)an electromechanical actuator 400 as shown in FIG. 13 could be used to adjust a louver adjustment mechanism 402, ultimately adjusting the rotational position of the louvers, preferably based on what is sensed by the sensors (in which case part number 72 in FIG. 9 would equate to part number 400 in FIG. 13).
[0037] FIG. 14 illustrates one possibility of a system architecture with which either sensor systemi.e., either the system shown in FIGS. 4-6 wherein a sensor probe 46 is actually, physically connected to one of the louvers 14, or the system shown in FIGS. 10-12 wherein one or more magnet holders 102, 202, etc. are mounted to louverscan be used along with the electromechanical actuator 400.
[0038] While specific embodiments of the invention have been shown and described, it is envisioned that those skilled in the art may devise various modifications without departing from the spirit and scope of the present invention.
