JPH0811014B2 - Sensor checking device for agricultural machinery - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor check device in an agricultural machine such as a combine harvester, and more particularly to a device for checking whether or not the sensor operates normally.

[0002]

2. Description of the Related Art In recent years, automatic control has been incorporated in agricultural machines such as combine harvesters, and a large number of sensors are provided at the base of an operating actuator. Various types of sensors used in such agricultural machinery may be damaged due to extremely severe conditions under which they are used. For the purpose of checking the operating conditions or adjusting the operating limits. , A service center, etc. must check the sensor using a dedicated checker.

[0003]

However, the adjustment and checking of the sensor may be carried out not only at the service center but also at the site of use of the agricultural machine.
It is required that the agricultural machine itself has a sensor check function. The present invention has been made in order to satisfy all the above-mentioned conventional demands, and an object thereof is to enable a sensor check at a field of use of an agricultural machine without preparing a special sensor checker. Another object of the present invention is to provide an extremely effective checking device for a sensor of an agricultural machine.

[0004]

In order to achieve the above object, the present invention takes the following technical means. That is, a sensor for automatic control that produces a detection output according to the displacement, setting means for setting the operating positions of a plurality of actuators provided in the agricultural machine, and a control unit for controlling the movement of each part of the actuator. In the agricultural machine equipped with, the switch means to be operated when checking the detection status of the sensor is connected to the input side of the control section, the informing means is connected to the output side, and the switch means is in the check state. When one of the plurality of sensors is being changed and one of the plurality of sensors is changed and the control unit determines the change in the detection output of the sensor, the notification means should be activated. A check device for a sensor in an agricultural machine characterized by being configured.

[0005]

According to the present invention, when checking the sensor for automatic control provided in the agricultural machine, one of the plurality of sensors is displaced by operating the check switch means. Then, if there is no abnormality in the sensor due to this displacement, the notification means is activated. Therefore, the worker can easily check the sensors for automatic control provided at various places of the agricultural machine by a simple operation of displacing the sensors in a desired order.

[0006]

Embodiments of the present invention will be described with reference to the drawings. First, the configuration will be described. FIG. 1 is a block diagram, and in this embodiment, an automatic threshing control system of a combine is shown, in which a sensor SS ₁ interlocking with a mowing clutch and a situation in which a mowed culm is conveyed to a threshing section. SS ₂ for detecting the sensor, a sensor SS ₃ for detecting the tip and the head of the head inserted into the threshing part,
SS ₄ and a sensor SS ₅ for detecting other threshing conditions are provided, and a switch SWh for previously setting the threshing depth of the tips by the threshing section as either deep, medium or shallow.
Is provided, and each of these outputs is an interface I /
It is given to the control unit CNT including a processor such as a microprocessor and a memory via F, and the control unit CNT outputs the control output according to the detection output of each sensor SS _{1 to} SS ₅ with reference to the output of the switch SWh. Then, the relay RL ₁ or RL ₂ for controlling the actuator is driven via the driver DR ₁ or DR _{2 so} that the handle depth of the tip is automatically controlled as a proper one. There is.

A check switch SWc is provided to check the sensors SS _{1 to} SS ₅ .
If this is operated and turned ON, this operation output will
It is given to the control unit CNT via the face I / F, and in response to this, the control unit CNT stops sending the control output and
Detection output change of the sensor SS ₁ ~ SS ₅ it is determined whether or not occur, when the change has occurred sends a drive output, e through the driver DR ₄ - it is assumed that sound the down HN.

If the control unit CNT enters the check mode by operating the switch SWc, the lighting output is sent out through the driver DR ₃ to turn on the indicator light PL, and the check mode is set. Is displayed. FIG. 2 shows the contents of the memory used when the control unit CNT determines changes in the detection outputs of the sensors SS _{1 to} SS ₅ , and the memory of the control unit CNT contains the addresses m to responsive to the sensors SS _{1 to} SS _5. m +
4 are stored in the data area DE and the buffer areas BE of the addresses n to n + 4, respectively, so that the detection output changes due to the data comparison between the corresponding addresses in both areas DE and BE. The presence or absence can be determined.

FIG. 3 is a flow chart showing the control situation when the processor in the control unit CNT executes the check mode, and the switch "SWcON?" 101 is YES.
In this case, the indicator light “PL lighting” 102 and “automatic control stop” 103 are performed, and the “first sensor output is BE
"Store and read at the beginning address of" and a data area "Read from beginning address of DE" 105, and then judge "both data does not match?" 106,
After performing down "HN drive" 107, the buffer area - if ho is YES "BE De of - transferring data to the address of the corresponding DE" 108 performed to detect the output change of the sensor SS _1.

Then, the switch "SWc ON?" 10
9 is judged again, and if YES, "store and read the next sensor output at the address next to BE" 110, and data area "read data from the address next to DE".
Perform 111. Then, "Does both data not match?" 112
If YES, the horn "HN drive" 113 is performed, and then the buffer area "Transfer BE data to the corresponding DE address" 114 is performed, and then the "final address?" It is determined whether or not the above processes up to m + 4 and n + 4 have been performed. If NO, then after step 109 and subsequent steps is repeated, Y in step 115.
Depending on ES, the process returns to step 104 and the above processing is repeated.

Therefore, if the sensors SS _{1 to} SS ₅ are turned on or off by a manual operation or the like, the horn HN as a sound generator sounds in response to this, and the sensors SS ₁ to SS ₅ are turned on.
Regardless of the mounting position of SS ₅ , it is possible to acoustically confirm these operating conditions while being in the vicinity of the sensors SS ₁ to SS ₅ . If step 109 is NO, that is, S
If Wc is OFF, the process proceeds to the display lamp "PL Off" 121 and "Automatic Control Resume" 122, the sensor SS ₁ ~ SS ₅
Return to the automatic control according to the detection output of.

However, the control unit CNT may be provided separately from that for automatic control, and the same is true even if a buzzer, a bell or the like is used instead of the horn HN, and the data SD ₁ F to SD _{5 are used.} F, SD
_A memory may not be used to hold ₁ N to SD ₅ N, a flip-flop circuit or the like may be used, or the control unit CNT may be configured by a combination of various logic circuits. In FIG. 3, steps may be interchanged depending on the situation. , Or can be omitted, and various modifications can be made freely.

[0013]

As is apparent from the above description, according to the present invention, a sensor provided at an arbitrary portion can be provided by adding some function to an existing one without preparing a special checker. The operating status can be confirmed easily and surely. Then, in agricultural machines with large and complicated structures such as combine harvesters, mud may adhere during work and grass straws may be entangled with each other, causing malfunction of the control device. It may be difficult to determine whether the error is due to a sensor abnormality or another factor, such as a malfunction in the hydraulic equipment.In such a case,
The operator switches the switch means to the check mode,
Of the multiple sensors, you can check the abnormality of the sensor just by moving the sensor to be checked, so it is easy to check the cause system and it is not necessary to check all the sensors in order. It also saves time.

[Brief description of drawings]

FIG. 1 is a block diagram.

FIG. 2 is a diagram showing the contents of a memory.

FIG. 3 is a flowchart showing the control status of the processor.

[Explanation of symbols]

SS ₁ ~ SS ₅ sensor CNT control unit HN horn SWc switch

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G05B 23/02 302 T 7531-3H

Claims (1)

[Claims] 1. A sensor for automatic control that produces a detection output in accordance with a displacement, and a plurality of actuators provided in an agricultural machine.
Setting means for setting the operating position of the actuator and the actuators for each part
In an agricultural machine equipped with a control unit for controlling the movement of the data, a switch unit operated when checking the detection state of the sensor is connected to the input side of the control unit, and a notification unit is connected to the output side. However, when the switch means is switched to the check state and one of the plurality of sensors is changed, the control unit changes the detection output of the sensor. A check device for a sensor in an agricultural machine, characterized in that it is configured to activate the notification means when judged.