JP2002017145A - Sensor check device for mobile agricultural machine - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To enable a sensor check of a displacement sensor or a position detection sensor at all times. SOLUTION: A combine 10 can determine whether a displacement sensor 70 that outputs a digital signal is operating normally, and whether a potentiometer 72 that outputs an analog signal according to a position is normally set. Control unit 74
And a horn 76 for notifying a predetermined signal,
If the control unit 74 determines that the displacement sensor 70 is operating normally, or determines that the potentiometer 72 is set normally, the horn 76 is sounded via the output port 78. You. Further, a switch 80 is provided between the output port 78 and the horn 76 so that the output port and the horn 76 can be connected and disconnected. When the switch 80 is disconnected, the result of the sensor check is transmitted to the horn 76. Not be notified.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile agricultural machine such as a combine machine, and more particularly to a sensor check device for a mobile agricultural machine that can determine whether a displacement sensor or the like is operating normally or not.

[0002]

2. Description of the Related Art A combine as a mobile agricultural machine has a divider for weeding grain culm and a raising device for raising grain culm as a pre-processing unit provided in a front part of the machine body. Raise the culm led between the adjacent dividers, raise it with a chain, cut off the root of the plant, and cut it, and this cut cereal culm is scraped and transferred backward, and the transferred cereal culm is It is taken over by the scraping transport device on the rear side of the transport body, and is sent from the scraping transport device to the saw depth transport device. In this saw depth conveying device, the length of the sent grain stalk is detected and automatically set to an appropriate saw depth, taken over by the feed chain on the threshing unit side, and further carried into the saw chamber by the feed chain. Dropped by leverage.

The combine includes an input check function for easily checking a switch input to the microcomputer and a failure of the sensor alone, a signal value of each potentiometer at a preset position and a value stored in the microcomputer. Compare with
It has a potentiometer check function that can determine whether the set is correct. For example, when an input check switch provided below the driver's seat is turned on, an input check state is automatically set. In this state, any switch, When the sensor was turned on and off, it was possible to determine that the sound was normal if a single sound was produced by the horn.

[0004]

Conventionally, however, the input check can be performed only when the input check switch is turned ON. Therefore, when this input check state is established, another automatic control (for example, a Automatic control and automatic sorting control) are performed in a stopped state, and it is not possible to inspect switches and sensors, correct a set of potentiometers, and the like while performing a normal operation. For this reason, for example, an input check or a potential check cannot be performed during the automatic sorting control, and there is a problem from the viewpoint of improving workability.

[0005] Further, since this input check is not generally performed by each user, the input check switch is usually installed in a place where it is difficult to see, and the ON / OFF operation of this input check switch is repeated. It was rather cumbersome.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. It is an object of the present invention to enable a displacement sensor or a position detection sensor to be checked at all times, and to perform a sensor check only when necessary. The present invention is to provide a sensor check device in a mobile agricultural machine capable of notifying the contents of the above.

[0007]

In order to achieve the above object, an invention according to claim 1 is provided with a displacement sensor (70) for outputting a digital signal by displacement, or fixed to an operating member and located at the position of the operating member. A signal from the position detection sensor (72) which outputs an analog signal in response thereto is taken in, and whether the displacement sensor (70) is operating normally or whether the position detection sensor (72) is set normally. A control unit (74) capable of discriminating whether or not there is a notification signal (7) for notifying a predetermined signal based on a command from the control unit (74);
6), the displacement sensor (7) disposed on the output side of the control unit (74).
0) is determined to be operating normally, or the actual detection value by the position detection sensor (72) at a predetermined position of the operating member and the control unit (74) are stored in advance. The control unit (74) outputs a predetermined signal from the control unit (74) when it is determined that the detected value matches the stored value, and the output port (78). ) And the notifying means (76), these output ports (78) and the notifying means (76).
Switching means (80) capable of selectively connecting and disconnecting.

The invention according to claim 2 includes both the displacement sensor (70) and the position detection sensor (72), and the control unit (74) receives a detection signal from the displacement sensor (70). If so, a stop means (84) for stopping the output of a predetermined signal based on the detection signal from the position detection sensor (72) is provided.

According to a third aspect of the present invention, the control section (7
4) can control various control operations for each work block, and based on the ON operation of a control start switch capable of starting these various control operations for each work block, the displacement sensor (70) belonging to the work block. ) Is capable of determining whether or not the normal operation is performed.

According to a fourth aspect of the present invention, the control section (7
4) is capable of controlling various control operations for each work block, and based on the ON operation of a control start switch capable of starting these various control operations for each work block, the position detection sensor ( 72) is capable of determining whether or not the setting is normally performed.

[Operation] The sensor check device according to the present invention determines whether or not the displacement sensor (70) is operating normally.
Alternatively, a control unit (74) capable of determining whether or not the position detection sensor (72) is normally set, and the control unit (7)
4) a notifying means (76) for notifying a predetermined signal based on a command from 4), and when it is determined that the displacement sensor (70) is operating normally, or when the position at the predetermined position is determined. An actual detection value of the detection sensor (72) is compared with a storage value previously stored in the control unit (74), and when it is determined that these detection values and the storage value match, Regardless of whether or not the work is being performed, a predetermined signal is output from the control unit (74) to the output port (78), and this can be reported by the reporting means (76). .

On the other hand, between the output port (78) and the notifying means (76), switching means (8) capable of selectively connecting and disconnecting the output port (78) and the notifying means (76).
0) is provided, and if the switching means (80) is connected, a signal output from the output port (78) is reported by the reporting means (76), and the switching means (80) is disconnected. For example, even if there is a signal output from the output port (78), it is not notified by the notification means (76).

Note that the reference numerals in parentheses described above are for the purpose of comparing the drawings, and do not limit the present invention in any way.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of a combine to which the present invention is applied. This combine 10 has a traveling machine body 12 supported by a traveling device (not shown). A driver's seat 14 and a grain tank 16 for temporarily storing grains are arranged behind the driver's seat 14. A threshing unit 18 is disposed on the left and right sides of the traveling body 12, and a pre-processing unit 20 is disposed in front of the traveling body 12 so as to be movable up and down.

The pre-processing unit 20 has a divider 22 for planting cereals, a narrow guide 24, a transport device 26, a cutting blade (not shown), and the like. The grain is transferred to the feed chain 28 of the threshing unit 18, further threshed and sorted in the threshing unit 18, and the selected grain is transferred to the grain tank 16 and temporarily stored therein. The grains stored in the grain tank 16 are carried out of the machine by a discharge auger (not shown) which stands upright from the rear of the grain tank 16 and has a swivelable long cylinder. In addition, a waste straw processing device 30 is provided at the rear of the machine.

As shown in FIG. 2, the threshing unit 18 includes:
A saw chamber 32 is formed in a compartment, and a saw cylinder 34 is accommodated in the saw chamber 32. The feed chain 28 is stretched on a side surface of the saw chamber 32 along the longitudinal direction of the machine. The grain stalks mowed in the pre-processing unit 20 are conveyed to the threshing unit 18 by the feed chain 28, and
2 and is threshed by a saw cylinder 34 in the saw chamber 32. On the other hand, on the rear end side of the feed chain 28,
The waste straws 36 are provided in series, and the treated waste straws are taken over by the waste straw processing device 30 and processed.

A receiving net 38 is arranged below the saw cylinder 34 accommodated in the saw chamber 32, and a processing cylinder 40 and a processing net 4 are provided below the saw cylinder 34 on the tip side behind the saw cylinder 34.
The processing room 44 in which the inside 2 is provided is connected. Below the saw chamber 32 and the processing chamber 44, a Karino fan 46 and a dust exhaust fan 48 are arranged in front of and behind the fuselage, and a wind from the Karino fan 46 to the dust exhaust fan 48 is generated. The sorting wind path is formed by the wind.

In the above-mentioned sorting air path, a swing sorting body 50 is provided.
Are swingably mounted in the longitudinal direction of the fuselage by a driving source (not shown), and below the swing sorting body 50, the grains leaked by the receiving net 38 and the processing net 42 are lifted. The first gutter 5 housed in the grain tank 16 via a tube 52
4 and a second gutter 58 for reducing unsorted kernels on the oscillating sorter 50 via a reducing cylinder 56 is provided. Further, a cross flow fan 47 that blows a sorting wind from below toward a straw rack 60 at the rear of the swing sorting body 50 is provided at an intermediate position between the first gutter 54 and the second gutter 58.

The rocking sorter 50 has a transfer plate 62 and a chaff sheave 6 between its left and right side walls, from front to rear.
4 is provided, and a crimp net 66 is stretched below the chaff sheave 64. The chaff sheave 64 has a number of fins 65 arranged substantially in parallel.
Can be automatically adjusted by a fin opening / closing motor (not shown).

FIG. 3 shows a control block diagram in the present embodiment.

In the figure, a combine 10 is fixed to a displacement sensor 70 such as a sorting automatic switch or a direction sensor that outputs a digital signal by displacement, a motor shaft or the like as an operating member, and the position of the motor shaft or the like is fixed. A position detecting sensor 72 for outputting an analog signal such as a lift potentiometer or a fin opening potentiometer is provided. Further, signals from the displacement sensor 70 or the position detection sensor 72 are fetched, and whether or not the displacement sensor 70 is operating normally is determined.
Alternatively, a control unit (microcomputer) 74 capable of determining whether or not the position detection sensor 72 is normally set is provided. Further, based on a command from the control unit 74, a horn 76 (notifying means for notifying a predetermined signal when a machine abnormality or a warning is issued through an output port 75 arranged on the output side of the control unit 74, Or a buzzer).
In addition, horn and buzzer, LED
It also includes means that can be visually recognized by a lamp or a lamp.

In the present embodiment, when it is determined that the displacement sensor 70 is operating normally, or when it is determined that the position detection sensor 72 is set normally, the control unit 74 is activated. And an output port for outputting a predetermined signal from the output port, and switching means disposed between the output port and the notification means 76 for selectively connecting and disconnecting the output port and the notification means 76.

In FIG. 3 described above, an output port 78 is provided on the output side of the control section 74, and it is determined that the displacement sensor 70 is operating normally in this output port 78. In this case, the actual detection value of the position detection sensor 72 at a predetermined position is compared with a storage value stored in advance in the control unit 74, and it is determined that these detection values match the storage value. In this case, a predetermined signal is constantly output. On the output side of the control unit 74, between the output port 78 and the horn 76, the output port 78 and the horn 76 are selectively disconnected,
Alternatively, a changeover switch 80 that can be connected is provided.

Normally, the horn 76 issues a machine abnormality or a warning. When the changeover switch 80 is turned on, the output port 78 and the horn 76 are connected. As a result, when the displacement sensor 70 is operating normally or when the position detection sensor 72 is set normally, a single tone “beep” is notified from the horn 76.

More specifically, for example, in the case of assembling a swing motor 82 (see FIG. 3) having a built-in potentiometer for driving the auger in a combine discharge auger apparatus, the discharge auger is manually moved to the storage position. After turning back, the power is connected while the turning motor 82 is detached from the machine body, and the turning motor 82 is driven by operating the operation lever of the auger. At this time, the actual detection value by the built-in potentiometer,
When the control unit 74 reaches a position (set position) where the stored value matches in advance, the horn 76 blows. Then, the turning motor 82 may be stopped by returning the operation lever, and the turning motor 82 may be assembled to the body in this state.

By the way, if the above operation is to be performed by a conventional method, first, a swing motor (and a potentiometer)
A power supply is connected to 82 and the input check switch is operated to set an input check mode. At this time, if the horn 76 does not sound, the position of the potentiometer is not at the auger storage position. Therefore, the mode is returned to the normal mode again, the operation lever is operated, and the turning motor 82 is slightly moved. Then, the mode is returned to the input check mode again to check whether or not the horn 76 blows. If the horn 76 does not blow at this time, the mode is returned to the normal mode again, the operation lever is operated, and the swing motor 82 is slightly moved. Such operations are repeated until the horn 76 blows (until the set position is reached). When the horn 76 blows, the discharge auger is manually adjusted to the storage position, and the turning motor 82 is assembled at that position.

In the above, the input check of the sensor is performed as follows.
Generally, the input check switch is usually installed in a place that is difficult to see because it is performed by the dealer's maintenance staff.
Repeating the on / off operation of this input check switch
It requires quite troublesome work. On the other hand, according to the present embodiment, since the sensor check is always possible,
The above-mentioned complication is relieved.

In this embodiment, the horn 76 serving as the notifying means is a case in which a horn for notifying an abnormality of a machine and a horn for checking a sensor are also used. Although described, these horns may be provided separately. When a horn is separately provided, the output port 78 and the horn may be connected and disconnected by the changeover switch 80 to the horn for notifying the result of the sensor check. Further, depending on the combine 10, both the displacement sensor 70 and the position detection sensor 72 may be mounted, or only one of them may be mounted.

Next, in the present embodiment, both the displacement sensor 70 and the position detection sensor 72 are provided, and the control unit 74 performs position detection when a detection signal from the displacement sensor 70 is input. There is provided stopping means for stopping the output of a predetermined signal based on the detection signal from the sensor 72.

In FIG. 3 described above, the combine 10
Includes both the displacement sensor 70 and the position detection sensor 72, and in the control unit 74, when a detection signal from the displacement sensor 70 is input to the control unit 74, And a signal stopping unit (stopping means) 84 for stopping the output of a predetermined signal via the output port 78 based on the detection signal of.

As the signal stopping unit 84, for example, a delay circuit (timer) is used. When a detection signal from the displacement sensor 70 is input to the control unit 74 by this delay circuit, the control unit 74 Even if the detection signal from the position detection sensor 72 is input to the
The output of the predetermined signal based on the detection signal from the CPU is stopped (or delayed), and the displacement sensor 70 and the position detection sensor 72 are stopped.
The horn 76 can be distinguished based on both detection signals from the horn 76.

Thus, the horn 76 for notifying that the displacement sensor 70 is operating normally and the horn 7 for notifying that the position detection sensor 72 is set normally.
6 is prevented from sounding simultaneously, and for the operator, it is possible to clearly distinguish which sensor check sound.

FIG. 4 shows a control flowchart relating to the input check of this embodiment, and this flow will be described below.

First, in S11, the displacement sensor 70
Has been determined whether or not the displacement sensor 70 has been switched.
Is switched to S12, in which a delay timer for temporarily stopping the horn 76 is set, and in S13, the horn 76 is issued to inform the operator that the input is correctly entered ( Single note).

In step S11, if the displacement sensor 70 is not switched and there is no input from the displacement sensor 70,
Proceeding to 14, it is determined whether the delay timer is 0 or not.
If the delay timer is not 0, the process returns to the beginning. If the delay timer is 0, it is determined in S15 whether or not the potentiometer has reached the set value. If the potentiometer has not reached the set value, the process returns to the beginning. If the potentiometer has reached the set value, the horn 76 is emitted in S16 (intermittent sound).

Next, in the present embodiment, the control unit 74
Can control various control operations for each work block, and based on the ON operation of a control start switch capable of starting these various control operations for each work block, the displacement sensor 70 belonging to the work block normally operates. It is possible to determine whether or not it is operating or whether or not the position detection sensor 72 is set normally.

That is, the combine 10 is controlled by the control unit 74
As an automatic control function by, for example, has various control functions such as saw depth automatic control, sorting automatic control, cutting height position control, direction automatic control, etc., but the displacement sensor 70 or When a detection signal is input from the position detection sensor 72, it is difficult to determine which sensor has caused the horn 76 to sound. Therefore, it is determined based on the ON operation of the control start switch that can start various control operations for each work block.

According to this embodiment, only the displacement sensor 70 or the position detection sensor 72 involved in the control can be checked, and it is easy to distinguish which sensor is performing the sensor check.

FIG. 5 shows a flowchart in the present embodiment. Here, a case where only the stock sensor, the tip sensor, and the main sensor as the displacement sensors 70 relating to the automatic saw depth control are input checked. This will be described as an example.

In FIG. 5, in step S20, it is determined whether the automatic saw depth switch as a control start switch for automatic saw depth control is ON or OFF. If the automatic saw depth switch is OFF, the process returns to the beginning. Automatic switch is O
If N, proceed to S21. This saw depth automatic switch is ON
This means that the automatic saw depth control is being performed. In this S21, it is determined whether or not the stock sensor for detecting the stock of the cereal stem is switched. If YES, the process proceeds to S24 to blow the horn, and if NO, the process proceeds to S22. In this S22, it is determined whether or not the tip sensor for detecting the tip of the grain stem has been switched. If YES, the process proceeds to S24 to blow the horn, and if NO, the process proceeds to S23. This S2
At 3, it is determined whether or not the main sensor has been switched. If YES, the process proceeds to S24 to blow the horn 76 (single sound). If NO, the horn 76 is not blown, and the depth control is automatically performed at S25.

FIGS. 6A and 6B illustrate a case where an input check of only the saw depth potentiometer as the position detection sensor 72 involved in the automatic control of the saw depth is performed as an example.

FIG. 5A enumerates the order of control by the combine 10. In S 30, the state of all input switches connected to the microcomputer is determined, and in S 31
In S32, it is possible to control the saw depth control for setting the saw depth of the grain stalk. In S32, it is possible to issue an alarm when an abnormality occurs during the work of the combine, and to enable an alarm / engine stop control to stop the engine. I do.

In step S33, the engine speed is detected from an AC generator (alternator), and a load monitor control for sounding a buzzer when the engine speed decreases becomes possible. In step S34, a side clutch or a direction sensor is used. Steering control is enabled, and in S35, back control for generating an intermittent sound when the aircraft moves backward is enabled. Next, S36
Then, the control relating to the input check and potentiometer set described later is made possible. In S37, various controls such as the cutting height control and the swing sorting control are made possible. Finally, in S38, the control determined in each of the above steps is performed. Output control to output all at once.

FIG. 6B shows a control flow relating to the potentiometer set in S36 in the above-described control flowchart.

According to this control flow, it is determined in S39 whether the automatic saw depth switch is ON or OFF. If the switch is OFF, the operation returns to the original state. If the switch is ON, the operation proceeds to S40 in S40. It is determined whether or not the output has reached the set value. Then, if the output of the saw depth potentiometer is not the set value (NO), the process returns to the original state, and Y
In the case of ES, in S41, the horn 76 is blown to emit an intermittent sound. That is, according to this embodiment, when the automatic saw depth switch is ON, the input check of only the saw depth potentiometer can be performed.

[0047]

As described above, according to the first aspect of the present invention, when it is determined that the displacement sensor is operating normally or the actual value detected by the position detection sensor is stored in advance. By providing an output port for comparing a stored value and outputting a predetermined signal from the control unit when it is determined that the detected value matches the stored value, the displacement can be performed at any time in parallel with the normal operation. Since the sensor check of the sensor or the position detection sensor is possible, for example, it is not necessary to newly provide a sensor check process, and the workability can be improved.

Further, by providing switching means for selectively connecting and disconnecting the output port and the notifying means, the contents of the sensor check can be notified only when necessary, and in other cases, In addition, it is possible to prohibit the notification about the sensor check and concentrate on the work.

According to the second aspect of the present invention, when the detection signal is input from the displacement sensor, the control unit stops outputting the predetermined signal based on the detection signal from the position detection sensor. The provision of the means makes it possible to clearly distinguish the sensor check of the displacement sensor from the sensor check of the position detection sensor.

According to the third aspect of the present invention, the O of the control start switch capable of starting various control operations for each work block.
Since it is possible to determine whether the displacement sensor belonging to the work block is operating normally based on the N operation, it is possible to perform only the sensor check of the displacement sensor belonging to the specific work block to be checked.

According to the fourth aspect of the present invention, the O of the control start switch capable of starting various control operations for each work block.
Based on the N operation, it is possible to determine whether or not the position detection sensor belonging to the work block is set normally, so that only the sensor check of the position detection sensor belonging to the specific work block to be checked can be performed. .

[Brief description of the drawings]

FIG. 1 is a schematic plan view of a combine to which the present invention is applied.

FIG. 2 is a sectional side view of the same.

FIG. 3 is a control block diagram according to the present embodiment.

FIG. 4 is a diagram showing a control flowchart relating to an input check.

FIG. 5 is a diagram illustrating a control flowchart relating to input checking of a displacement sensor relating to automatic sawing depth control.

FIG. 6A is a diagram illustrating a control flowchart that enumerates a large flow of control by the combine, and FIG.
FIG. 4 is a diagram showing a control flowchart relating to the potentiometer set.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Combine 70 Displacement sensor 72 Position detection sensor 74 Control part 76 Horn 78 Output port 80 Changeover switch 82 Swing motor 84 Signal stop part

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[Procedure amendment]

[Submission date] October 17, 2000 (2000.10.
17)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] Figure 3

[Correction method] Change

[Correction contents]

FIG. 3

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tatsuya Yamazaki 667 Idai-cho, Oji-zu, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 Inside Mitsubishi Agricultural Machinery Co., Ltd. (72) Masahiro Nishikori 667 1 Mitsubishi Agricultural Machinery Co., Ltd. (72) Inventor Toshiyuki Ishibashi 667 Ijiacho, Oji-machi, Higashi-Izumo-cho, Yatsuka-gun, Shimane 1 F term in Mitsubishi Agricultural Machinery Co., Ltd. (Reference) 2B076 AA03 EA04 EA10 EC23 ED21

Claims (4)

[Claims] 1. A displacement sensor that outputs a digital signal according to displacement or a position detection sensor that is fixed to an operation member and outputs an analog signal according to the position of the operation member is fetched, and the displacement sensor operates normally. A control unit capable of determining whether or not the position detection sensor is normally set, and a notifying unit for notifying a predetermined signal based on a command from the control unit. In the agricultural machine, disposed on the output side of the control unit, when it is determined that the displacement sensor is operating normally, or the actual detection value by the position detection sensor at a predetermined position of the operating member and the control When it is determined that the detected value and the stored value match by comparing the stored value stored in advance with the unit,
An output port that outputs a predetermined signal from the control unit, and a switching unit that is disposed between the output port and the notification unit and that can selectively connect and disconnect these output ports and the notification unit. A sensor check device for a mobile agricultural machine, comprising: 2. The apparatus according to claim 1, further comprising both the displacement sensor and the position detection sensor, wherein, when a detection signal from the displacement sensor is input, the control unit performs a predetermined operation based on the detection signal from the position detection sensor. The sensor check device for a mobile agricultural machine according to claim 1, further comprising a stop unit that stops outputting a signal. 3. The control section is capable of controlling various control operations for each work block, and turning on a control start switch capable of starting these various control operations for each work block.
The sensor check device for a mobile agricultural machine according to claim 2, wherein whether or not the displacement sensor belonging to the work block is operating normally can be determined based on the operation. 4. The control section is capable of controlling various control operations for each work block and turning on a control start switch capable of starting these various control operations for each work block.
The sensor check device for a mobile agricultural machine according to claim 2, wherein it is possible to determine whether or not the position detection sensor belonging to the work block is set normally based on the operation.