JPH0221329Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a working machine such as an agricultural machine or a civil engineering construction machine, and more specifically to a working machine that issues an audible alarm.

Recently, work machines include microcomputers,
Advances in various sensors have provided many automatic monitoring and protection functions, and with the development of voice synthesis devices, there is a trend toward issuing various warnings by voice. When an abnormality occurs in such a working machine, it is necessary to immediately turn off the key switch, cut off the power supply, and stop the engine to ensure safety. However, if the power supply is cut off by turning off the key switch, the alarm sound will no longer be output, making it impossible to fully identify the location of the abnormality, and if there are two or more abnormalities, only one location can be recognized. There is a problem. Furthermore, if the key switch is turned off to cut off the power supply or stop the engine, the sensor status changes and an accurate warning sound cannot be output.

The present invention was developed in view of the above circumstances, and even if the key switch is turned off and the engine is stopped, audio output is possible for a predetermined period of time. The purpose of the present invention is to provide a work machine that improves safety and reliability by outputting a warning sound according to the status of the sensor.

The present invention will be explained in detail below based on drawings showing an embodiment of the present invention in a combine harvester.

FIG. 1 is a schematic side view of a combine harvester according to the present invention (hereinafter referred to as the present machine), in which an electronic device as described later is installed in an operation column 91, and a speaker 90 is installed on the front side of a top cover 93 behind the driver's seat. ing.

FIG. 2 is a block diagram schematically showing the main parts of the electronic circuit of the proposed machine. In the figure, 10 is a microcomputer that performs various automatic controls, including a CPU (central processing unit) 11 and an input/output interface 1.
2. ROM (read-only memory) 13 and RAM
(Random access memory) 14, etc., and its control program is configured to also control voice notification.

A power supply terminal of the microcomputer 10 is connected to a positive electrode of a battery 2 via a normally open contact of an electromagnetic relay 5, which will be described later, and a negative electrode of the battery 2 is grounded to the body. The positive terminal of the battery 2 is connected to an off-delay circuit 82 via the key switch 3, and the off-delay circuit 82 is connected to the input end of a switch circuit 83 interposed between the electromagnetic relay 5 and the body ground. When turned on, the switch circuit 83 is turned on, the excitation coil 5c of the electromagnetic relay 5 is excited, and the normally open contact 5a connected between the battery 2 and the power supply terminal of the microcomputer 10 is closed.
Further, even if the key switch 3 is turned off, the switch circuit 83 is turned on for a period of time determined by the off-delay circuit 82, and as a result, the excitation coil 5c of the electromagnetic relay 5 is energized, so that the normally open contact 5a continues to close, and the key switch 3 is turned off.
Even after the microcomputer 10 is turned off, power continues to be supplied to the microcomputer 10 for a predetermined period of time.

A large number of sensors, switches, etc. for protection and monitoring are connected to each port a ₁ to _{a 12} of the large number of input ports 12a of the input/output interface 12.
Port _A1 is turned on when the threshing lever, which is involved in the successive threshing operation of the threshing clutch, is operated to the threshing side.
A threshing switch 41 is connected to port a ₂ which sets port a ₁ to low level, and turns on when the reaping lever, which is involved in engaging and disengaging the reaping clutch, is operated to the reaping side and sets port a ₂ to high level. Reaping switch 42
is connected. A signal which becomes high level when the output of the charging circuit 43 of the battery 2 is not obtained is given to the port _a3 , and the charge lamp 73 is turned on by this signal. port a ₄
When the pressure in the hydraulic circuit of the hydraulic system driven by the engine is below a predetermined pressure, it is turned on (it is turned off when the normal pressure is reached due to engine rotation) and the port _A4 is set to low level. Oil pressure sensor 4
4 is connected, and when this oil pressure sensor 44 is turned on, an oil pressure lamp 74 is turned on.
A switch circuit 8 is connected to port _a5 , and when turned on, the switch circuit 8 sets the port _a5 to low level.
A charged liquid sensor 45 that turns on when the charged liquid level in the battery 2 falls below a predetermined value is connected to the input end of the switch circuit 8. When the sensor 45 turns on, the switch circuit 8 turns on and charging starts. The liquid lamp 75 is turned on. When the cooling water in port _A6 reaches a specified temperature or higher, it turns on and shuts off the port.
A water temperature sensor 46 is connected which sets _a6 to a low level, and when this water temperature sensor 46 is turned on, a water temperature lamp 76 is turned on.

Port A ₇ is equipped with a No. 2 screw rotation sensor 4 that detects the rotation speed of the No. 2 screw in the No. 2 grain removal section.
7 is connected, and when the No. 2 screw becomes overloaded, the No. 2 screw rotation sensor 47 outputs a high level signal to the port _a7 , and the No. 2 alarm lamp 77 lights up.

A handling cylinder rotation sensor 48 that detects the rotational speed of the handling cylinder is connected to ports _a8 and _a9 , and when the handling cylinder becomes overloaded and the rotational speed becomes low, the handling cylinder rotation sensor 48 detects the rotational speed of the handling cylinder.
sets port _A8 to high level and lights up the deceleration instruction lamp 78, and also sets port _A9 to high level and instructs to stop if the handling cylinder is heavily loaded and its rotational speed becomes abnormally low. The lamp 79 is turned on.

A paddy sensor 50 is connected to the port _a10 , which turns on when the amount of paddy in the topsatsuka 93 exceeds a predetermined level, and sets the port _a10 to a low level.When the sensor 50 is turned on, the topsatsuka lamp 70 lights up. It's becoming like that.

Connected to port _A11 is a fuel sensor 51 using a positive characteristic thermistor attached to the fuel tank, which is exposed to the air and activated when the fuel level falls below a predetermined level, and sets the port _A11 to a low level. The fuel lamp 71 is turned on when the fuel sensor 51 is turned on. A cutter sensor 52 is connected to the port a ₁₂ and sets the port a ₁₂ to a low level when a clogging of the straw cutter in the straw disposal section located at the rear of the machine is detected.
When the switch 2 is turned on, the cutter lamp 72 is turned on. Port _A13 is installed in the air purifier and turns on when the dust removal efficiency deteriorates.
Set a ₁₃ to low level and turn on air cleaner lamp 81.
An air cleaner sensor 53 is connected to turn on the light.

Furthermore, a voice stop switch 54 for stopping the output of voice messages, which will be described later, is connected to port a ₁₄ , and when the switch 54 is turned on, the port
a ₁₄ is set to low level.

On the other hand, a speaker 90 is connected to the output port b ₁ , and upon receiving a control signal from the CPU 11, a ROM dedicated to the speech synthesizer that stores audio data is connected.
The configuration is such that the data in the read-only memory is read out and an analog audio signal is output to drive the speaker 90.

Each lamp 61 to 63 of a master lamp 60 consisting of three types of lamps is connected to the output ports b ₂ to _{b 4} , and when each output port b ₂ , b ₃ , and b ₄ becomes low level, the lamp 61 is turned off, respectively. , 62, and 63 are lit. Master lamp 60 is for all switches,
The status of the sensors 41 to 48 and 50 to 52 is logically judged and the respective lamps 61 to 63 are turned on or blinked in accordance with the degree and condition of the abnormality, and 61 indicates that the work is being performed normally. This is a blue lamp that is turned on continuously when the work is in progress, and flashes when the work is not in progress even though each part is normal. 62 indicates that the degree of abnormality is relatively minor and it is possible to continue work. However, if left unattended, the abnormality will spread and cause grain loss, etc. This is a yellow lamp that flashes, and 63 is a high-risk lamp that will make it impossible to continue work unless immediate action is taken. This is a red lamp that flashes when an abnormality occurs. A buzzer 55 for prompting a start-up inspection is connected to the output port _b5 .

The microcomputer 10 has a key switch 3
When turned on, the system is configured to sequentially issue multiple messages related to start-up inspections by voice.
When the voice stop switch 53 is pressed after the first message, a new message is issued to prompt a start-up inspection.

When the sensors connected to each input port _A3 to _A12 detect an abnormality, the ports _A3 , _A7 , _A8 ,
_a9 , _a10 are high level, ports _a4 , _a5 , _a6 , _a11 ,
When _a12 and _a13 become low level, the lamps 74~
79, 70 to 72, 81 are turned on, and the following message having the same reference numeral as each port is issued.

Message number Contents a ₃ Required power supply (Charging circuit is abnormal) a ₄ Required power supply (Hydraulic circuit is abnormal) a ₅ Required power supply (Charging fluid is insufficient) a ₆ Overheat Death (It's overheating) a ₇ Niban Screw Yuga Kafka Desu (The second screw is overloaded) a ₈ Gensokushi Tekudasai (Please slow down) a ₉ Teishishi Tekudasai (Please stop) a ₁₀ Totsupusatsuka Gaitsupaidesu ( (The air cleaner is full) a ₁₁ Please replenish the fuel. a ₁₂ The straw is clogged. a ₁₃ The air cleaner is full. (The air cleaner is abnormal.) Each message is repeatedly emitted until the monitoring means such as each sensor no longer detects an abnormality or until the audio stop switch 53 is turned on.

Figure 3 is a plan view of the area around the driver's seat of the proposed machine.
The aforementioned master lamp 60 is provided approximately in the center of the front panel 91 in front of the driver's seat 92, and from the left side there are a blue lamp 61, a yellow lamp 62, and a yellow lamp 62.
The red lamps 63 are arranged in parallel. Further, the key switch 3 is provided on the front panel 91 near the rear of the master lamp 60, and furthermore, the aforementioned warning lamps 70 to 79 are provided in the front of the side panel 95 to the left of the driver's seat 92. There is.

A small compartment 93a for the speaker 90 is provided in the top cover 93 behind the driver's seat.A round hole is made in the steel plate that forms the outer wall of the top cover 93, and this steel plate is used as a buttful board to install the speaker 90. is installed.

Now, based on Figure 4, the microcomputer 10
The control routine will be explained below. When the key switch 3 is turned on, the switch circuit 83 is turned on and the electromagnetic relay 5 is turned on.
As a result, the excitation coil 5c is excited and the normally open contact 5a is closed, and as a result, power is supplied to the microcomputer 10, and the microcomputer 10 enters a state in which it can execute automatic control, and starts control. The microcomputer 10 first sets the start-up check flag SF, which indicates that the start-up check has been executed once, to a reset state SF=0, and also checks whether the charging circuit 43 and oil pressure sensor 44 are operating normally or not via the input port _a3. and A ₄ condition. If both the charging circuit 43 and the oil pressure sensor 44 detect an abnormality and port _a3 is at high level and port _a4 is at low level, start-up inspection control is executed. That is, even if the key switch 3 is turned on but the engine is not started, the charging circuit 4 is not activated even though the charging circuit and hydraulic circuit are normal.
Since charging has not yet started, the port _a3 is at a high level, and since the pressure in the hydraulic circuit has not increased, the oil pressure sensor 44 is turned on and the port _a4 is at a low level. Therefore, the charging circuit 43 and the oil pressure sensor 44
If both detect an abnormality, it is assumed that the power has been turned on but the engine has not yet been started, and a start-up inspection is prompted. In this case, it is assumed that the charging circuit 43 and the hydraulic circuit do not become abnormal at the same time.

As mentioned above, the start-of-work inspection control is to issue messages related to a plurality of start-of-work inspections in sequence after the voice stop switch 54 is pressed, and if the voice stop switch 54 is not pressed after the message is issued, the buzzer 55 is activated. It's starting to rumble.

Now, when the start-up inspection control is finished, the microcomputer 10 sets the start-up inspection flag SF.
Set SF=1 so that the start-up inspection control will not be executed thereafter.

Thereafter, the microcomputer 10 monitors the status of the charging circuit 43, the sensors, etc. except for the oil pressure sensor 44, based on the status of the input ports _a5 to _a13 , and if any sensor etc. detects an abnormality, the input port _ao (n =
5 to 13) are low level (however, input ports a ₃ , a ₇ ,
a ₈ , a ₉ , and a ₁₀ ), a message a _o related to the monitoring target is issued, and for example, the water temperature sensor 46 detects an abnormality and port a ₆ becomes low level. Then, the voice of Message A ₆ "Overheat Death" will be heard on speaker 90.
emanates from.

On the other hand, when the engine is started, the charging circuit 43,
When it is detected that one or both of the oil pressure sensors 44 is normal, the input port _a3 becomes low level and/or the input port _a4 becomes high level, and the microcomputer 10 monitors the monitoring means 43 of each sensor etc. ~48, 50~53 are sequentially monitored according to the status of input ports _a3 to _a13 , and when one of the monitoring means detects an abnormality, the input port _ao becomes low level (however, input ports _a3 , a ₇ , _a8 , _a9 , _a10
(high level _only when In this way, the microcomputer 10 monitors each input port sequentially, but once it has finished monitoring all the input ports, it newly stores the status of all the ports, and this stored content is retained until the next input. be done.

Upon hearing this warning message _ao , the driver turns off the key switch 3 to stop the engine in order to take a predetermined action. However, even if the key switch 3 is turned off, the excitation coil 5c of the electromagnetic relay 5 is demagnetized after a predetermined time delay determined by the off-delay circuit 82, and its normally open contact 5a is opened to open the microcomputer 1.
Since the power supply to the microcomputer 10 is cut off, the microcomputer 10 continues to operate within this predetermined time. Then, within this time, the microcomputer 10 detects if there is an input port _ao that has detected an abnormality among the conditions of the input ports _a3 to _a13 stored just before the key switch 3 was turned off. A predetermined message _ao associated with its input port _ao is emitted m times.

The control after the key switch 3 is turned off, which is the gist of the present invention, will be explained in detail below. The CPU 11 stores the contents of input ports _a3 to _a13 in predetermined registers,
Based on this memory, the above-mentioned message is uttered. When the key switch 3 is turned off, first, n=3 is set, and the memory contents of the register related to the input port _ao = _a3 are checked (). If the stored contents indicate normality, n is incremented by one step () and the same process is repeated, and if a ₃ to a ₁₃ are normal, the series of processes ends. If an abnormality is stored in the register related to the input port a _o , utter the message a _o (), check whether the content of the counter for counting the number of times this message a _o is uttered is m (), and m Until n is reached, n is advanced by one step (), and the process returns to step (). Therefore, if an abnormality is stored in registers related to a plurality of input ports, other messages will also be issued alternately. In this way, the series of processing ends when one or more types of messages are uttered m times (in the case of multiple types of messages, they are uttered alternately).

In this way, even if the key switch 3 is turned off and the engine is stopped, the message related to the input port _ao where the abnormality was detected immediately before the key switch 3 was turned off will be output reliably and multiple times until the end.
The driver can reliably understand the content of the message. In particular, when a message is issued after the key switch 3 is turned off, there is a risk of false alarms because the status of monitoring means such as sensors changes when the key switch 3 is turned off. Furthermore, since the message is emitted when the engine is stopped, the message can be heard with less noise, and no message will be missed.

Note that when an abnormality occurs in two or more locations, messages related to the abnormality are issued in sequence. In addition, the microcomputer 10 is connected to the key switch 3 and the off-delay circuit 4.
Although the microcomputer 10 is configured to operate even after the key switch is turned off by supplying power through the key switch 1, power is supplied to the microcomputer 10 without going through the key switch 3, so that the microcomputer captures the key switch's off signal. It is also possible to adopt a configuration in which the above-mentioned control is performed.

As described in detail above, the present invention provides an engine that is stopped by a key switch, and operations of predetermined parts.
The apparatus is equipped with a condition monitoring means and a voice synthesis device, and when the monitoring means detects a predetermined operation or condition, the voice synthesis device emits a message corresponding to the predetermined operation or condition. The machine is equipped with means for storing the contents detected by the monitoring means during its operation, and means for emitting the entire message related to the stored contents a predetermined number of times after the engine is stopped by the key switch. Therefore, the alarm message can be reliably transmitted to the end without the risk of erroneous output, and even after the operator has turned off the key switch and stopped the engine due to fear of danger.
Before that, in other words, during work, you can hear the entire warning message according to the detection content of the monitoring means, and therefore, even after the engine has stopped, you can know the status of the engine while it is running, and you can perform maintenance on the part related to the malfunction. According to the present invention, a working machine with excellent safety and reliability, such as being able to perform inspections reliably, can be realized.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is a schematic side view of the proposed machine, Figure 2 is a block diagram of its main electronic circuit, Figure 3 is a plan view of the area around the driver's seat,
FIG. 4 is a control flowchart. 2...Battery, 3...Key switch, 5...
Electromagnetic relay, 10... Microcomputer, 43
... Charging circuit, 44 ... Oil pressure sensor, 65 ... Fuel sensor, 50 ... Paddy sensor, 52 ... Katsuta sensor, 60 ... Master lamp, 82 ... Off-delay circuit, 90 ... Speaker.

Claims (1)

[Scope of utility model registration request] It is equipped with an engine that is stopped by a key switch, a means for monitoring the operation and condition of a predetermined part, and a speech synthesizer, and when the monitoring means detects a predetermined operation or condition, the speech synthesizer emits a message corresponding to the predetermined operation or condition. In the working machine driven by the engine, means for storing the detection contents of the monitoring means during the work, and a means for storing the entire message related to the stored contents by the key switch to stop the engine. A working machine characterized by comprising: a means for emitting a predetermined number of times after the