JP2676760B2 - Checker for work machine control device - Google Patents

Description

The present invention relates to a checker for inspecting a control device such as a tractor and a combine.

[Prior art] CP from data from various switches, setting devices, sensors, etc.
There is a work machine such as an agricultural work machine such as an electro-hydraulic control type tractor that is processed by U to automatically control the hydraulic pressure for driving the working unit and a combine machine.

For example, when inspecting the control device that controls the above-mentioned control in the conventional agricultural work machine, as shown in FIGS. 11 to 13, the terminals of the tester 100 are connected to the predetermined contact points of the control device to determine the output values of the respective parts. It was read, and the suitability was judged by comparing this with the reference value. Incidentally, the connection location of the tester terminal was often the joint portion 103 of the controller box 101 and the sensor 102 or the connection terminal 104 provided in the controller box 101. Moreover, when individually inspecting each sensor, the wiring of the sensor 102 was removed and the inspection was performed.

[Problems to be Solved by the Invention] However, since there are many types of control by the control device and the control contents are complicated, there are many check points and inspection is not easy. In addition, when detaching individual sensors from the machine and inspecting,
Needed 5 separately.

Furthermore, when inspecting the control box itself, the sensor 102 and output confirmation lamp 1 specific to the farm work machine
Apart from 08, dummy sensor 102 'and dummy lamp 108'
I had to prepare and check the output state at that time with the dummy lamp while adjusting this dummy sensor and inspected it.

B Structure of the Invention [Means for Solving the Problems] In order to solve the above-mentioned inconvenience and inconvenience during the inspection of the control device, the present invention provides the following checker for the control device of the working machine. Is.

That is, the checker for a control device of a work machine according to the present invention transmits as an analog signal from a serial input unit that is an input unit of data transmitted as a serial signal from the control device of the work machine, a control sensor for the work machine, and the like. An analog input unit that is an input unit for the incoming data, an A / D converter that performs A / D conversion of the data input to the analog input unit, a CPU that processes the digitized data, and the processing results thereof A display unit for displaying, and a main body having an input operation switch for selecting desired data from the data input to the serial input unit or the analog input unit and supplying it to the CPU, and switchably connected to the main unit CPU operation corresponding to a control device for each type of work machine and a sensor different from the control device. Is stored separately, and the main body side is provided with a port for inputting a signal from the control system of the control device and a port for inputting a signal from a sensor. Operation] The data sent from the control device to the input section as a serial signal is supplied to the CPU. The CPU performs arithmetic processing on this based on the program of the storage carrier and displays the result on the display unit. A program is stored in the storage carrier corresponding to the control device for each model of the work machine, so by mounting it on the main body of the storage device for the control device, you can check it only by visually checking the display section. Can be done. Moreover, since the inspection items can be sequentially and automatically switched, the inspection can be performed quickly and accurately.
Further, since the CPU for operating the CPU corresponding to the sensor different from the control device is separately stored in the storage carrier, not only the control device but also each sensor itself can be inspected.

If the power source of the work machine is used as a power source for inspection, no external power source is required.

[Embodiment] First, an agricultural work machine illustrated in FIGS. 6 to 9 will be described as an example of a work machine including an inspection control device.

This agricultural work machine 1 is provided with a three-point link type coupling device (hereinafter referred to as a 3P hitch) 3 at a rear portion of a tractor 2, and a rotary cultivator 5 is attached to the 3P hitch. 3P hitch 3
Includes a top link 10 whose front ends are pivotally attached to the tractor 2 and a pair of left and right lower links 11, 11 and which are attached to the tip ends of hydraulic lift arms 12, 12 of the tractor. Is connected to the middle portion of the lower links 11, 11. A mounting frame 15 of the cultivator 5 is attached to the rear ends of the links 10, 11, 11.

When the main cylinder 21 provided below the control seat 20 is expanded and contracted, the lift arms 12 and 12 rotate up and down, whereby the cultivator 5 moves up and down. One of the pair of lift rods (the right lift rod in the illustrated example) 11
(R) is provided with a lift rod cylinder 22,
By expanding and contracting this, the inclination of the tiller 5 in the left-right direction is adjusted. These cylinders 21, 22 are controlled by ascending and descending proportional solenoid valves 24, 25 and a horizontal control solenoid valve 26.

The following are provided as sensors for hydraulic control. A draft sensor 30 is provided at the base of the top link 10 to detect the traction resistance of the working machine by measuring the load applied to the top link. Lift arms 12,1
A lift arm sensor 31 that detects the angle of the lift arm is provided on the second shaft 12a. Lift arm axis 12 above
At both ends of the rotating shaft 33 inserted through the inside of a, the sensor arm 34,
34 is integrally provided, a stroke cylinder 35 is attached to the sensor arm 34 (R) on the lift rod cylinder side, and a sensor rod 36 is attached to the other sensor arm 34 (L). And these stroke sensors
The lower ends of 35 and the sensor rod 36 are connected to the lower links 11, 11. The stroke sensor 35 is a sensor that detects the rolling amount of the cultivator 5 with respect to the tractor 2.
The rear cover 38 of the cultivator 5 is provided with a depth sensor 39 that produces the working depth by measuring the angle of the cover. Further, the tractor body is provided with a slope sensor 41 for detecting the lateral inclination of the machine body.

A control box 46 containing a controller 45 inside is provided near the side of the control seat 20, and a control lever 50, a working depth dial 51, a lift switch 52, and a sensitivity switch are provided on an operation panel surface 47 of the control box. 53, lowering speed dial 54, raising position dial 55,
Main manual switch 56, horizontal selector switch 57, horizontal manual switch 58, tilt adjustment dial 59, horizontal sensitivity switch 60
And a category switch 61 is provided.

The control device 62 of this agricultural working machine is configured as shown in FIG. 9, and the controller 45 processes the input signals supplied from each sensor, switch and setting device, and the proportional solenoid valve 24 for raising and lowering, 25 and solenoid valve 2 for horizontal control
Output signal to 6. These input signals and output signals can be taken out from the connector 63 to the outside as serial signals.

Next, an example of the checker according to the present invention will be described. The checker 70 is composed of a box-shaped main body 71, a plurality of IC cards 72, ... Which are storage carriers, harnesses 73 (A, B) for control devices and sensors, and other accessories. ing.

The main body 71 has an A / D converter 75 and a CPU 76 in its central portion, a display unit 78 with a liquid crystal display on the upper surface, an operation switch 79 for switching inspection items, a control device for checking the main unit and sensor , Connectors 81, 82, a jack insertion hole 83 for connecting an AC adapter, and a power switch 85 are provided. The controller 81 for checking the main unit is a serial signal input section and is directly connected to the CPU 76, while the sensor checking connector 82 is an analog signal input section for the A / D converter 75. Is connected to the CPU76 via. Further, an insertion opening 87 for inserting the IC card 72 is provided on one end surface. When the IC card 72 is inserted into the insertion opening 87, the card is held with about 1/3 of the card inserted, and the information stored inside the card can be read by the CPU 76. As described above, since the information is read without inserting the entire card, the type of IC card used can be identified even at the time of inspection, which is convenient. Also, although a mouthpiece inside the card insertion opening 87 for receiving the card is commercially available, since the commercially available mouthpiece is generally shallow,
In order to insert the entire card, the mouthpiece is located at the back of the main body, and a thin-walled rectangular tube-shaped guide tool is required at a portion from the insertion opening to the mouthpiece. In this respect, if only a part of the card is inserted as in the present embodiment, the guide tool as described above is not required, and the number of parts can be reduced.

The IC card 72 is made separately for each type of work machine (for example, tractor, combine, etc.), and stores a program for operating the CPU 76 in association with the control device of each work machine.

There are 73 harnesses (A) for checking the entire control system that combines the controller and sensors, and 73 (B) for checking only the sensors. The former is the main body side coupler 73a and the controller side coupler. Has 73b,
The latter has a main body side coupler 73c and a plurality of sensor side couplers 73d to 73f corresponding to the respective sensors. For example, the coupler 73d is for a lift arm sensor and a depth sensor, the coupler 73e is for a slope sensor, the coupler 73f is for a draft sensor and a stroke sensor, and so on. The sensor check harness may also have one coupler on the sensor side, and may be sequentially switched for each sensor.

 Next, the inspection method will be specifically described.

When inspecting the controller box, tractor 2
Key switch and power switch 85 for checker body 71
With the harness turned off, connect the connector 81 of the checker with the coupler 90 connected to the connector 63 of the controller box by the harness 73 (A), turn on the key switch of the tractor, and then insert the IC card 72 into the insertion slot 87. To insert. When the power switch 85 is turned on, the output of each control system from the controller is serially sent through the harness 73 (A), and the main body 71 is operated by the power supplied from the power source of the tractor 2, For example, as shown in FIG. 10 (a), since it is displayed on the display unit 78, "honki check" is selected with the operation switch 79 (1). Next, the model formation of the control device is displayed. Check if it is the same as the actual control device. Next, as shown in Fig. 10 (b),
Either che Select a check item.

When "panel check" is selected, the setting section and switches provided on the control panel surface 47 are inspected. For example, as shown in Table 1, the items are arranged in order, and when the operation switch (4) is pressed, the display item moves in the direction in which the number increases, and when the operation switch (3) is pressed, the number decreases. The display items are set to move to.

In the "control lever", as shown in FIG. 10 (c), the output value of the control lever 50 is displayed in the upper part of the display unit 78, and the lowest value and the highest value are displayed in the lower part. The lowest value and the highest value are indicated by numerical values of "1" and "254" (representing the upper and lower limits of the dial scale) that are set for convenience,
The output value should be within this range. Alternatively, the control lever 50 may be actually operated to check whether the output value changes appropriately. When the control lever 50 is operated 10 degrees, the output value changes by about 40 degrees.

On the "deep platter dial", the display is as shown in Fig. 10 (d).
The output value of the working depth dial 51 is displayed in the upper part of 78, and the shallowest value and the deepest value are displayed in the lower part with the numerical values of "254" and "1". Operating the plowing depth dial 51 10 degrees changes the output value by approximately 9 degrees.

In the "work selection", the work name set as shown in FIG. 10 (e) is displayed.

In the case of "elevation switch", the state of the elevation switch is displayed in a blinking manner as shown in Fig. 10 (f).

Although individual explanations are omitted for the following items, in the case of setting devices, the output value at that time and the reference value for determining whether it is appropriate, etc. are simultaneously displayed on the display unit 78, and switches In the case of, since the state at that time is displayed on the display unit 78, an accurate inspection can be easily performed. Further, since the inspection items are sequentially shifted only by operating the operation switch 79, the inspection can be performed quickly.

When "sensor check" is selected as a check item, the sensor is inspected. control As in the case of the control panel, the items are arranged in order as shown in Table 2 and can be selected by the operation switch 79 (3, 4).

In the "lift arm sensor", as shown in FIG. 10 (g), the output value of the lift arm sensor is displayed in the upper part of the display 78.
The standard value "253" at the maximum is displayed at the bottom. It suffices that the output value is large when the lift arm 31 rises and becomes small when the lift arm 31 descends, and the output value should be 253 or more when the lift arm 31 is in the highest position. If the lift arm moves 10 degrees, the output value changes by about 34 degrees.

When inspecting the other sensors, the output value of the sensor and the comparison reference value are displayed as in the case of the lift arm sensor.

When inspecting the sensor itself, see Fig. 10 (a).
Select “Sensor tester” on the screen. Then, the coupler 73c of the harness 73 (B) is inserted into the connector 82, and the sensor to be inspected is connected to any of the couplers 73d to 73f.
The correspondence between the couplers 73d-f and the sensor is as described above. When the harness 73 (A) is not connected to the power source of the tractor, the attached AC adapter 91 is used to connect to the external power source.

The output voltage of the sensor is displayed on the display unit 78. The sensor is operated by an appropriate amount, and the appropriateness is determined by comparing the operating amount with the change amount of the output voltage.

Further, the continuity of the harness can be checked by connecting a pair of terminals taken out from the connector 82, which is an analog input section, to both ends of the harness. As the power supply at this time, the power supply of the tractor 2 may be used from the connector 81, or the external power supply may be used by the AC adapter 91.

C. Effect of the Invention As is clear from the above description, the checker for the control device of the working machine according to the present invention is adapted to each model.
Since the inspection procedure is programmed by a memory carrier such as an IC card, the inspection can be performed quickly and accurately. In addition, no external power supply or dummy sensor is required for inspection.

Also, by installing a serial input section for inputting a serial signal from the control unit and an analog input section for inputting an analog signal from a sensor, it is possible to inspect the function of the entire control unit and inspect each sensor. I can do it now.

Further, the inspection can be easily performed by simultaneously displaying the data value transmitted from the control device and the comparison reference value thereof on the display unit.

It is obvious that this checker for a control device can be applied as a checker for a control device in a device other than a traveling vehicle such as a paddy dryer and a fruit sorting device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an example of a checker according to the present invention,
2 (a) and 2 (b) are a front view and a side sectional view of the checker body, FIG. 3 is a view showing a memory carrier, and FIG. 4 (a) and FIG.
FIG. 5B is a diagram showing a harness, and FIG. 5 is a block diagram of the checker. Fig. 6 is a side view of the agricultural work machine, and Fig. 7 is
FIG. 8 is a perspective view of the 3P hitch, FIG. 8 is an explanatory view of the controller panel surface, and FIG. 9 is a block diagram of the control device. FIGS. 10 (a) to 10 (g) are views showing the display portion of the checker. 11 to 13 are explanatory views showing a conventional inspection method. 1 ... Agricultural work machine, 2 ... Tractor, 5 ... Rotary tiller, 62 ... Control device, 70 ... Checker, 71 ... Main body, 72
...... IC card (memory carrier), 73 ...... harness, 75 …… A /
D converter, 76 …… CPU, 78 …… Display, 79 …… Operation switch, 81 …… Connector (serial input section), 82 …… Connector (analog input section).

Claims (1)

(57) [Claims] 1. A serial input unit, which is an input unit for data transmitted as a serial signal from a control device for a work machine, and an analog unit, which is an input unit for data transmitted as an analog signal from a sensor for controlling a work machine. Input section,
A / D for A / D converting the data input to the analog input section
Converter, CPU that processes digitized data,
A display unit for displaying the processing results, and a main body having an input operation switch for selecting desired data from the data input to the serial input unit or the analog input unit and supplying it to the CPU, and switching to the main body A plurality of storage carriers that are operably connected, and each of the storage carriers stores the CPU operating program corresponding to a control device for each model of the work machine and a sensor different from the control device. A checker for a control device of a working machine, characterized in that a port for inputting a signal from a control system of the control device and a port for inputting a signal from a sensor are provided side by side on the main body side. .