JP2006311047A - State detection system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the structure of a state detection system which detects a state change in a state detection object region and to lower costs by eliminating the need for a sensor, a switch, a wiring harness, etc. <P>SOLUTION: The state detection system which detects the state change in the state detection object region includes an IC tag 9 provided in the state detection object region, an IC tag reader 10 capable of communicating with the IC tag 9, a communication state changing means of changing the state of communication between the IC tag 9 and IC tag reader 10 according to the state change in the state detection object region, and a state change deciding means of deciding the state change in the state detection object region on the basis of the change in the state of communication between the IC tag 9 and the IC tag reader 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a state detection system that is provided in an agricultural machine or the like and detects a state change of a state detection target part.

In an agricultural machine or the like, a state detection system is provided to detect a state change of a state detection target part. For example, a combine detects the open / close state of covers (chamber cover, bottom plate, second base plate, etc.), cutter open / close state, auger storage state, grain tank storage state, etc., and the detection results Is notified to the operator by a monitor or the like (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 5-44635

  However, the conventional state detection system detects a state change of the state detection target part with a sensor or a switch, and inputs a detection signal to the control device via the harness, which may increase the complexity of the structure and increase the cost. There is. For example, in the case of a combine, since there are a large number of state detection target parts, not only a variety of sensors and switches are required, but wiring may be complicated, resulting in a significant increase in cost.

The present invention was created for the purpose of solving these problems in view of the above circumstances, and is a state detection system that detects a change in the state of a state detection target part. An IC tag provided in the IC tag, an IC tag reader capable of communicating with the IC tag, a communication state changing means for changing a communication state between the IC tag and the IC tag reader in accordance with a state change of the state detection target part, And a state change determination means for determining a state change of the state detection target part based on a change in a communication state between the IC tag and the IC tag reader. With this configuration, since the change in the state of the state detection target part is detected based on the change in the communication state between the IC tag and the IC tag reader, a sensor, a switch, a harness, and the like are not required, the structure is simplified, and the cost You can go down.
Further, the communication state changing means changes the communication state between the IC tag and the IC tag reader based on a relative displacement between the IC tag and the communication disturbing substance. If comprised in this way, since the communication state of an IC tag and an IC tag reader can be changed clearly, the state change of a state detection object site | part can be judged reliably.
The communication state changing means changes the communication state between the IC tag and the IC tag reader based on a change in relative distance and / or angle between the IC tag and the IC tag reader. To do. With this configuration, the communication state between the IC tag and the IC tag reader can be easily changed, so that the structure can be further simplified and the cost can be reduced.

  Next, embodiments of the present invention will be described with reference to the drawings. 1 and 2, reference numeral 1 denotes a combine to which the state detection system of the present invention is applied. The combine 1 threshs the pre-treatment unit 2 that cuts off the stems, and the threshing of the cut off stems. A threshing section 3 for sorting out the selected grains, a grain tank 4 for storing the selected grains, a discharge auger 5 for transporting the grains in the grain tank 4 to the outside of the machine, and a threshing waste after the threshing A post-processing unit 6 for processing, an operation unit 7 on which an operator gets on, and a crawler type traveling unit 8 are provided.

  The combine 1 has a plurality of state detection target parts, and a state change in these state detection target parts is detected by the state detection system of the present invention. As shown in FIG. 3, the state detection system includes an IC tag (RFID) 9 provided in a state detection target part, an IC tag reader 10 that can communicate with the IC tag 9, and a state change of the state detection target part. Based on the communication state change means for changing the communication state between the IC tag 9 and the IC tag reader 10 (for example, the presence / absence or strength of the received signal on the reader side) and the change in the communication state between the IC tag 9 and the IC tag reader 10 And a state change judging means (control device 11) for judging the state change of the state detection target part.

  The IC tag 9 is preferably a non-contact passive tag that is electromotive (electromagnetic induction type or microwave type) according to the communication operation of the IC tag reader 10 and can communicate with the IC tag reader 10 in a non-contact manner. The frequency band used for communication is a band of 135 KHz or lower, 13.56 MHz band, UHF band, 2.45 GHz band, and the like, and can be selected in consideration of the characteristics of each frequency band. For example, when the communication state between the IC tag 9 and the IC tag reader 10 is changed by a communication disturbing substance (electromagnetic wave blocking substance) such as metal or moisture, the UHF band or 2.45 GHz band that is easily affected by the communication disturbing substance. Is preferred.

  The IC tag reader 10 is not particularly limited as long as it can communicate with the IC tag 9, but is preferably one that can detect a change in the communication state with the IC tag 9 in detail. For example, in the case of an IC tag reader 10 that can detect the intensity of a signal received from the IC tag 9 (such as a gain applied to a reception amplifier), various state changes can be made based on the intensity of the received signal as well as the presence or absence of the received signal. It becomes possible to judge in detail. In this embodiment, when detecting a plurality of state changes in the combine 1, one IC tag reader 10 is also used for detecting these states. In this way, the number of IC tag readers 10 can be reduced and the implementation cost can be reduced.

  The communication state changing means may be any means that changes the communication state between the IC tag 9 and the IC tag reader 10 in accordance with the state change of the state detection target part. For example, the communication state between the IC tag 9 and the IC tag reader 10 is changed based on the relative displacement between the IC tag 9 and the communication disturbing substance. In this way, since the communication state between the IC tag 9 and the IC tag reader 10 can be clearly changed, it is possible to reliably determine the state change of the state detection target part. The communication state between the IC tag 9 and the IC tag reader 10 may be changed based on a change in the relative distance or angle between the IC tag 9 and the IC tag reader 10. In this case, since no additional parts are required, the structure can be simplified and the cost can be reduced.

  The state change determination means monitors the communication state between the IC tag 9 and the IC tag reader 10 and determines the state change in the state detection target part based on the change. For example, as in the IC tag detection control shown in FIG. 4, the IC tag reader 10 determines whether the IC tag 9 is detected / not detected, and the state of each state detection target part based on the communication state with each IC tag 9. Recognize. At this time, if not only the detection / non-detection of the IC tag 9 but also the strength of the received signal is determined, more detailed state recognition becomes possible.

  Next, the first to fourth state detection systems applied to the combine 1 will be specifically described with reference to the drawings. As shown in FIGS. 5 to 7, the first state detection system detects the open / close state of the handling chamber cover 12 using the handling chamber cover 12 of the threshing unit 3 as a state detection target part. The handling chamber cover 12 covers an upper portion of the handling chamber 14 that houses the handling cylinder 13, and is opened and closed with the support shaft 12a as a rotation fulcrum. A hook 15 made of a communication obstructing substance (for example, an iron plate) is rotatably provided on the side of the handling chamber cover 12, and a pin 16 is projected on the side of the handling chamber 14. When 15 is engaged, the opening operation of the chamber cover 12 is locked. A lock release lever 17 that can be rotated in the vertical direction is provided on the front end side of the chamber cover 12. The lock release lever 17 and the hook 15 are connected via a rod 18. When the lock release lever 17 is operated upward, the hook 15 and the pin 16 are disengaged, and the opening operation of the chamber cover 12 is allowed. Is done. Reference numeral 19 denotes a gas spring that urges the chamber cover 12 in the opening direction.

  The IC tag 9 constituting the first state detection system is attached to the front wall 20 of the threshing unit 3 via a resin mounting seat 21. This is to prevent the communication between the IC tag 9 and the IC tag reader 10 from being obstructed by the front wall 20 made of a communication disturbing substance (for example, an iron plate). The mounting position of the IC tag 9 is in the vicinity of the pin 16, and is a position where the IC tag 9 approaches (or comes into contact with) the hook 15 when the hook 15 is engaged with the pin 16. That is, when the chamber cover 12 is in the open state, the hook 15 is also moved upward integrally, so there is no effect on the communication between the IC tag 9 and the IC tag reader 10, but when the chamber cover 12 is closed, Since the hook 15 that is a communication disturbing substance is close to the IC tag 9, a change occurs in the communication state between the IC tag 9 and the IC tag reader 10. Accordingly, it is possible to determine the open / closed state of the handling chamber cover 12 based on the change in the communication state in the IC tag reader 10.

  As shown in FIG. 8, the second state detection system uses the bottom plate 22 and the second bottom plate 23 of the threshing unit 3 as a state detection target portion, and detects the open / closed state of the bottom plate 22 and the second bottom plate 23. . The bottom plate 22 opens and closes the cleaning port of the first basket (communication interference substance) 24 that collects the sorted first object, and the second bottom plate 23 collects the second basket (communication interference) that collects the second selected article. Material) Open and close the 25 cleaning opening. The bottom plate 22 and the second bottom plate 23 are connected via a link mechanism 26, and are opened / closed simultaneously according to the operation of the bottom plate opening / closing lever 27. Note that 28 is the first spiral for conveying the first object, 29 is the second spiral for conveying the second object, and 30 is a compressed air fan for generating the sorting air.

  The IC tag 9 constituting the second state detection system is attached to the bottom plate 22 and the second plate 23 made of resin. This is because the bottom plates 22 and 23 themselves do not hinder communication between the IC tag 9 and the IC tag reader 10. The mounting position of the IC tag 9 is the tip of the bottom plate 22 and the second bottom plate 23, and when the bottom plates 22 and 23 are in the closed state, the IC tag 9 is close to (or in contact with) the first collar 24 or the second collar 25. It is. That is, when the bottom plates 22 and 23 are in the open state, the IC tag 9 is separated from the first cage 24 or the second cage 25, so there is no effect on the communication between the IC tag 9 and the IC tag reader 10, but the bottom plate 22 , 23 closes, the IC tag 9 comes close to the first rod 24 or the second rod 25, which is a communication interference substance, so that the communication state between the IC tag 9 and the IC tag reader 10 changes. Accordingly, it is possible to determine the open / closed state of the bottom plate 22 or the bottom plate 23 based on the change in the communication state in the IC tag reader 10.

  As shown in FIGS. 1 and 2, the third state detection system uses the discharge auger 5 as a state detection target part, and detects the storage state and the displacement state of the discharge auger 5. The discharge auger 5 conveys the grain fed from the grain tank 4 via the vertical pipe 31 to the discharge port 5a at the tip, and discharges it from here. The position of the discharge port 5a is appropriately changed depending on the turning operation and lifting / lowering operation of the discharge auger 5, but is stored in a predetermined position on the machine (see FIGS. 1 and 2) when the vehicle is traveling.

  The IC tag 9 constituting the third state detection system is attached to a predetermined position of the discharge auger 5 via a resin mounting seat 32. This is to prevent the communication between the IC tag 9 and the IC tag reader 10 from being hindered by the discharge auger 5 made of a communication obstructing substance (for example, an iron pipe). The attachment position of the IC tag 9 may be one place, but a plurality of places are preferable. In the third state detection system, since the communication state between the IC tag 9 and the IC tag reader 10 is changed based on the change in the relative distance or angle between the IC tag 9 and the IC tag reader 10, the IC tag 9 It is necessary to select the mounting position in consideration of the communication distance and directivity of the IC tag 9 and the IC tag reader 10. That is, if the discharge auger 5 is turned or moved up and down, the presence or absence of the IC tag signal and the reception intensity in the IC tag reader 10 change, so that the state of the discharge auger 5 can be determined based on the change in the communication state.

  As shown in FIGS. 1 and 9, the fourth state detection system detects the storage state of the grains in the grain tank 4 using the grain tank 4 as a state detection target part. The grain tank 4 is arranged adjacent to the right side of the threshing unit 3, and the grain selected by the threshing unit 3 is sent to the grain tank 4 through the first spiral 28 and the whipped cylinder 33. . The operator always needs to grasp the amount of stored grains in the grain tank 4, and the overflow of the grain tank 4 is avoided by discharging the grains at an appropriate timing.

  The IC tag 9 constituting the fourth state detection system is attached to the inner wall surface of the grain tank 4 made of resin. This is because the grain tank 4 itself does not hinder communication between the IC tag 9 and the IC tag reader 10. The number of IC tags 9 is not limited, but it is preferable to arrange a plurality of IC tags 9 with a predetermined interval in the vertical direction. If it does in this way, it will become possible to produce a change in the communication state of each IC tag 9 and IC tag reader 10 according to the storage amount of the grain (communication obstruction substance) containing much water. For example, in a situation where there is almost no grain in the grain tank 4, there is no effect on the communication between each IC tag 9 and the IC tag reader 10, but if the amount of stored grain in the grain tank 4 increases, Since the grain that is an interfering substance comes into contact (or close proximity) with the IC tag 9, a change occurs in the communication state between the IC tag 9 and the IC tag reader 10. Thereby, it becomes possible to judge the storage amount of the grain in the grain tank 4 based on the communication state with each IC tag 9 in the IC tag reader 10.

  In the present embodiment, the IC tag 9 and the IC tag reader 10 are arranged so as to face each other with the grain stored in the grain tank 4 interposed therebetween. If it does in this way, since the communication state of IC tag 9 and IC tag reader 10 changes clearly according to the amount of storage of the grain in grain tank 4, it becomes possible to improve the detection accuracy of a state detection system. Become.

  Further, the fourth state detection system can be used not only for detecting the amount of stored grains in the grain tank 4 but also for detecting the amount of water (moisture content) contained in the grains. That is, since the amount of electromagnetic waves blocked by the grain is proportional to the moisture contained in the grain, the amount of moisture contained in the grain can be determined based on the reception intensity of the IC tag signal in the IC tag reader 10. .

  Moreover, the moisture content detection by the IC tag 9 and the IC tag reader 10 can also be applied to wetting material detection (grain moisture content detection) in the threshing unit 3. For example, the IC tag 9 is affixed to the oscillating flow plate (made of resin) of the oscillating sorter 34, and the IC tag reader 10 is disposed above the IC tag 9 to detect the reception intensity of the IC tag signal in the IC tag reader 10. To do. In this way, the reception intensity of the IC tag signal in the IC tag reader 10 changes according to the amount of water contained in the grain on the oscillating flow plate, so that it is possible to determine the wetting material. In addition, the selection accuracy can be improved by automatically adjusting the processing capacity of the threshing unit 3 (for example, the fin opening of the chaff sheave) and the cutting travel speed according to the amount of water contained in the grain.

  According to the present embodiment configured as described, the state detection system for detecting the state change of the state detection target part includes the IC tag 9 provided in the state detection target part, and the IC tag reader capable of communicating with the IC tag 9. 10 and a communication state changing means for changing the communication state between the IC tag 9 and the IC tag reader 10 according to a state change of the state detection target part, and a change in the communication state between the IC tag 9 and the IC tag reader 10. Since it is configured to include state change determination means for determining the state change of the state detection target part, sensors, switches, harnesses, and the like are unnecessary, and the structure can be simplified and the cost can be reduced.

  Further, the communication state changing means changes the communication state between the IC tag 9 and the IC tag reader 10 based on the relative displacement between the IC tag 9 and the communication disturbing substance. The communication state can be clearly changed to reliably determine the state change of the state detection target part.

  Further, the communication state changing means changes the communication state between the IC tag 9 and the IC tag reader 10 based on a change in the relative distance or angle between the IC tag 9 and the IC tag reader 10, and thus adds components and the like. Therefore, the communication state between the IC tag 9 and the IC tag reader 10 can be changed, and the structure can be further simplified and the cost can be reduced.

It is a side view of a combine. It is a top view of a combine. It is a block diagram which shows the structure of a state detection system. It is a flowchart which shows the state change judgment procedure of a state detection system. It is a front view of a threshing part. It is a front view which shows a handling chamber cover. It is a side view which shows the opening-and-closing lock part of a chamber cover. It is a principal part side view of a sorting room. It is a front view of a grain tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combine 3 Threshing part 4 Grain tank 5 Discharge auger 9 IC tag 10 IC tag reader 11 Control apparatus 12 Handling chamber cover 15 Hook 22 Bottom plate 23 Bottom plate

Claims (3)

A state detection system for detecting a state change of a state detection target part,
An IC tag provided in the state detection target part;
An IC tag reader capable of communicating with the IC tag;
Communication state changing means for changing a communication state between the IC tag and the IC tag reader in accordance with a state change of the state detection target part;
State change determination means for determining a state change of the state detection target part based on a change in a communication state between the IC tag and the IC tag reader;
A state detection system comprising:   2. The state detection according to claim 1, wherein the communication state changing unit changes a communication state between the IC tag and the IC tag reader based on a relative displacement between the IC tag and a communication disturbing substance. system.   The communication state changing means changes the communication state between the IC tag and the IC tag reader based on a change in relative distance and / or angle between the IC tag and the IC tag reader. Item 1. The state detection system according to Item 1.

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