JPH06339321A - Check apparatus of sensor in agricultural machine - Google Patents

Abstract

PURPOSE:To obtain a check apparatus of a sensor for automatic control, pro vided on an agricultural machine such as combine and capable of simply carry ing out confirmation of operation without using exclusive checker, etc. CONSTITUTION:The check apparatus of a sensor is provided with a sensor for agricultural machine producing detection output by ON or OFF, a switch operated in checking detection condition of the sensor and a control part for feeding driving output in judging change of detection output of the sensor and a sound generator operated by the driving output.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for checking whether or not a sensor provided for automatic control in an agricultural machine such as a combine is normal.

[0002]

2. Description of the Related Art Recently, with the spread of automatic control, various sensors for actuating a switch by an actuator have been used. Especially, in agricultural machines such as combine harvesters, many sensors are used for automatic control. A dedicated sensor checker is used in a service center or the like for the purpose of checking the operating status of these or adjusting the operating limit.

[0003]

However, the adjustment and checking of the sensor may be performed not only at the service center but also at the site where the automatic control equipment is used. It has come to be required to have a check function of. The present invention has been made in order to satisfy all of the above-mentioned conventional demands,
The purpose of the present invention is to provide a highly effective automatic control sensor check device that can perform sensor check without preparing a dedicated sensor checker even in the field of use of automatic control equipment. It is in.

[0004]

In order to achieve the above object, the sensor checking device for an agricultural machine according to the present invention is configured as follows. That is, a sensor of an agricultural machine that produces a detection output when turned on and off, a switch that is operated when checking the detection status of the sensor, and a case where the switch is switched to a sensor check mode, A check device for a sensor in an agricultural machine, comprising: a control unit that outputs a drive output when a change in the detection output of the sensor is determined; and a sound generator that operates by the drive output. is there.

[0005]

Therefore, according to the present invention, when checking the sensor for automatic control which is provided in advance, if the sensor is operated after the check switch is operated to switch to the sensor check mode, the sensor is detected. Sounds a horn or other sound generator when the output changes from on to off, or from off to on.

[0006]

Embodiments of the present invention will be described in detail below with reference to the drawings showing embodiments. FIG. 1 is a block diagram. In this example, an automatic threshing control system for combine harvesters is shown, in which a sensor SS ₁ that interlocks with a mowing clutch, a sensor SS ₂ that detects a situation in which a mowed grain culm is conveyed to a threshing section, a threshing Sensors SS ₃ and SS ₄ for detecting the tip and the head of the tip to be inserted into the cutting part and a sensor SS ₅ for detecting other threshing conditions are provided, and the threshing depth of the tip by the threshing part is set to be deep, medium or shallow. A switch SWh to be set as any one is provided, and each output of these is given to a control unit CNT including a processor such as a microprocessor and a memory via an interface I / F, and the output of the switch SWh is provided. a reference, upon sending control unit CNT is a control output in response to detection outputs of the sensors SS ₁ ~ SS _5, through the driver DR ₁ or DR ₂ Akuchie - Drives the relay -RL ₁ or RL ₂ for control, and automatically controlling the squeezing depth of the tip as appropriate.

A check switch SWc is provided to check the sensors SS _{1 to} SS ₅ .
If you operate this to turn it on, this operation output will
It is given to the control unit CNT via the face I / F. 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 has become one which sounds a down HN.

If the control unit CNT enters the check mode in response to the operation of the switch SWc, the lighting output is sent out through the driver DR ₃ to turn on the indicator lamp PL, and the check mode is entered. Is displayed. Figure 2 shows the contents of the memory control unit CNT is used to determine the detection output change of the sensor SS ₁ ~ SS _5, the memory in the control unit CNT, in response to the sensor SS ₁ ~ SS ₅ Address m ~
Data area DE of m + 4 and addresses n to n +
4 buffer areas BE are provided and the sensors SS ₁ to
Previous data SD ₁ F to SD depending on ON / OFF of SS _5
5 F is de - Taeria to DE, the current de - data SD1N~S
Since D5N is stored in the buffer area BE, it is possible to judge whether or not the detection output has changed by comparing the data between the corresponding addresses in both areas DE and BE.

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 indicates YE.
If S is reached, the indicator lamp “PL lighting” 102 and “automatic control stop” 103 are performed, and “the first sensor output is stored and read at the head address of BE” 104 and
Data area “Read data from DE start address”
After performing 105, it is judged "both data do not match?" 106, and if YES, horn "HN drive" 10
7 is performed, the buffer area “transfer of BE data to corresponding DE address” 108 is performed, and the sensor S
A change in the detection output of S ₁ is detected.

Then, the switch "SWcON?" 109
Again, and in response to YES, "store and read the next sensor output at the address next to BE" 110 and the data area "read data from the address next to DE" 111 are performed, If "both data does not match?" 112 is YES, the horn "HN drive" 113 is performed, and then the buffer area "Transfer BE data to the corresponding DE address" 114 is performed. The "final address?" 115 is used to determine whether or not the above processing up to the addresses m + 4 and n + 4 has been performed. If NO, repeat step 109 and the subsequent steps, and then YES in step 115.
Accordingly, 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} activated.
Regardless of the mounting position of the sensor S
It can be confirmed by sound while staying in the vicinity of S _{1 to} SS ₅ . Further, if step 109 is NO, the process proceeds to the indicator light “PL extinguished” 121 and “restart automatic control” 122, and returns to the automatic control according to the detection outputs of the sensors SS _{1 to} SS ₅ .

[0012] However, often the automatic control of the control unit CNT is also provided separately, ho - buzzer instead of down HN -, The same is true with bell or the like, de - data SD ₁ F~SD ₅ F, SD ₁
N-SD ₅ N may be held by using a flip-flop circuit or the like, or the control circuit CNT may be configured by combining various logic circuits, and in FIG. 3, steps may be changed according to the situation. , Or omitted, and various modifications are possible.

[0013]

As is apparent from the above description, according to the present invention, even if a dedicated checker is not prepared, by adding some functions to an existing one, a sensor provided at an arbitrary portion can be provided. Since the operating status can be easily and surely confirmed, it is extremely effective for checking the sensors arranged in each part of an agricultural machine having a large and complicated structure, which is very effective for checking and adjusting work. can get.

In particular, according to the present invention, since the sound generator sounds when the state of the sensor changes in the check mode, it is possible to easily confirm whether or not the sensor is normal even if there is some noise.

[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.
It is

[Explanation of symbols]

SS _{1 to} SS ₅ sensor CNT control unit HN horn (sound generator) SWc switch

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Claims (1)

[Claims] 1. A sensor of an agricultural machine which produces a detection output when turned on and off, a switch which is operated when checking the detection status of the sensor, and a switch which is switched to a sensor check mode by the switch. A check device for a sensor in an agricultural machine, comprising: a control unit that sends a drive output when a change in the detection output of the sensor is determined; and a sound generator that operates according to the drive output.