JP7467290B2 - Notification device and work vehicle equipped with same - Google Patents

Description

The present invention relates to an alarm device and a work vehicle equipped with the same.

Conventionally, there is known technology for warning (notifying) the operator of construction machinery based on whether the seat belt is fastened, the lock position of the cut-off lever (gate lock lever), the inclination of the construction machinery, etc. (see, for example, Patent Document 1).

JP 2017-145626 A

For example, an operator who drives and operates a work vehicle such as construction machinery may attempt to stand up from his/her seat with the engine of the work vehicle running and the cut-off lever down (without getting off the vehicle) in order to visually check the area where the work vehicle is being carried out. In such a case, continuing to issue an alarm and persistently reminding the operator to remain seated will be irritating to the operator who fully understands the reason for the alarm and is acting accordingly (in the above example, the operator who stands up from his/her seat to visually check). As a result, it becomes more difficult for the operator to take the above-mentioned action. In other words, there is a risk that the alarm will hinder the operator's actions that are necessary for the work.

The present invention has been made to solve the above problems, and its purpose is to provide an alarm device that can reduce the risk that an operator's actions required for work will be hindered by an alarm, and a work vehicle equipped with the alarm device.

The notification device according to one aspect of the present invention includes a detection unit that detects the riding state of an operator, and a notification unit that executes a notification process to alert the operator based on the detection result of the detection unit, the notification process includes a first notification process and a second notification process having a lower notification level indicating the degree to which the operator is alerted than the first notification process, and the notification unit switches from the first notification process to the second notification process after executing the first notification process based on the detection result of the detection unit.

A work vehicle according to another aspect of the present invention includes the notification device, a work machine that performs work, and a control unit in which an operator rides and in which an operating unit for operating the work machine is disposed.

The above configuration reduces the risk that the operator's actions required for work will be hindered by the notification.

1 is a side view showing a schematic configuration of a hydraulic excavator, which is an example of a work vehicle according to an embodiment of the present invention. 2 is a block diagram showing a schematic configuration of an alarm device applied to the hydraulic excavator. FIG. 4 is an explanatory diagram showing an example of a display screen of a monitor provided in the notification device. FIG. FIG. 11 is an explanatory diagram showing another example of the display screen of the monitor. FIG. 13 is an explanatory diagram showing an example of a display of an icon that prompts an operator to fasten a seat belt. FIG. 11 is an explanatory diagram showing another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 13 is an explanatory diagram showing an example of an icon display that prompts the operator to take a seat in the cockpit. FIG. 11 is an explanatory diagram showing another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. FIG. 11 is an explanatory diagram showing still another example of the display of the icon. 5 is a flowchart showing an example of an operation of the notification device. 20 is a timing chart showing detection signals and display switching timings in the operation of FIG. 19 . 10 is a flowchart showing another example of the operation of the notification device. 22 is a timing chart showing detection signals and display switching timing in the operation of FIG. 21. 13 is a timing chart when the display unit displays common visual information to each sensor. 10 is a flowchart showing still another example of the operation of the notification device. 25 is a timing chart showing detection signals and display switching timing in the operation of FIG. 24. 10 is a flowchart showing still another example of the operation of the notification device. 27 is a timing chart showing detection signals and display switching timing in the operation of FIG. 26. 11A and 11B are explanatory diagrams showing examples of combinations of visual information displayed on the display unit.

The embodiment of the present invention will be described below with reference to the drawings. First, an overview of a work vehicle to which the notification device of this embodiment is applied will be described.

[1. Work vehicles]
1 is a side view showing a schematic configuration of a hydraulic excavator 1, which is an example of a work vehicle according to the present embodiment. The hydraulic excavator 1 includes a lower traveling structure 2, a working machine 3, and an upper rotating structure 4.

Here, directions in FIG. 1 are defined as follows. First, the direction in which the lower traveling body 2 moves straight is the fore-aft direction, with one side being the "front" and the other being the "rear". In FIG. 1, as an example, the traveling motor 22 side relative to the blade 23 is shown as the "front". Also, the lateral direction perpendicular to the fore-aft direction is the left-right direction. In this case, the left side as seen from the operator sitting in the cockpit 41a is the "left" and the right side is the "right". Furthermore, the direction of gravity perpendicular to the fore-aft and left-right directions is the up-down direction, with the upstream side of the gravity direction being the "up" and the downstream side being the "down".

The lower traveling body 2 is equipped with a pair of left and right crawlers 21 and a pair of left and right traveling motors 22. Each traveling motor 22 is a hydraulic motor. The left and right traveling motors 22 drive the left and right crawlers 21, respectively, to move the hydraulic excavator 1 forward and backward. The lower traveling body 2 is provided with a blade 23 for performing ground leveling work and a blade cylinder 23a. The blade cylinder 23a is a hydraulic cylinder that rotates the blade 23 up and down.

The working machine 3 includes a boom 31, an arm 32, and a bucket 33. By independently driving the boom 31, the arm 32, and the bucket 33, excavation work for soil and sand can be performed. In other words, the hydraulic excavator 1 as a work vehicle includes the working machine 3 that performs work.

The boom 31 is rotated by a boom cylinder 31a. The boom cylinder 31a has a base end supported on the front of the upper rotating body 4 and can move telescopically. The arm 32 is rotated by an arm cylinder 32a. The arm cylinder 32a has a base end supported on the tip of the boom 31 and can move telescopically. The bucket 33 is rotated by a bucket cylinder 33a. The bucket cylinder 33a has a base end supported on the tip of the arm 32 and can move telescopically. The boom cylinder 31a, arm cylinder 32a, and bucket cylinder 33a are composed of hydraulic cylinders.

The upper rotating body 4 is configured to be rotatable relative to the lower running body 2 via a swivel bearing (not shown). A control section 41, a swivel base 42, a swivel motor 43, an engine room 44, etc. are arranged on the upper rotating body 4. The upper rotating body 4 rotates via the swivel bearing by being driven by the swivel motor 43, which is a hydraulic motor.

Multiple hydraulic pumps (not shown) are arranged on the upper rotating body 4. Each hydraulic pump is driven by an engine or an electric motor (not shown) inside the engine room 44. Each hydraulic pump supplies working oil (pressurized oil) to hydraulic motors (e.g., left and right travel motors 22, swing motor 43) and hydraulic cylinders (e.g., blade cylinder 23a, boom cylinder 31a, arm cylinder 32a, bucket cylinder 33a). The hydraulic motors and hydraulic cylinders that are driven by the supply of working oil from any hydraulic pump are collectively referred to as hydraulic actuators or simply actuators.

A control seat 41a is arranged in the control section 41 in which the operator rides. An operating section 41b is arranged around the control seat 41a. The operating section 41b is composed of various levers, switches, buttons, etc. The operator sits in the control seat 41a and operates the operating section 41b to drive the hydraulic actuator. This allows the lower traveling body 2 to travel, the blade 23 to perform ground leveling work, the work machine 3 to perform excavation work, the upper rotating body 4 to rotate, etc. In other words, the hydraulic excavator 1 as a work vehicle is equipped with a control section 41 in which the operator rides and in which the operating section 41b for operating the work machine 3 is arranged.

In particular, the various levers constituting the operation unit 41b include an operation lever 41b1 for driving the hydraulic actuator, as well as a cutoff lever 41b2. The cutoff lever 41b2 is provided near the cockpit 41a so as to be rotatable up and down. When the operator presses down on the cutoff lever 41b2, a cutoff sensor 53 (see FIG. 2) described later turns ON, and it becomes possible to operate the operation lever 41b1 to drive a specific actuator. On the other hand, when the operator pulls up the cutoff lever 41b2, the cutoff sensor 53 turns OFF, and the actuator cannot be driven even if the operator operates the operation lever 41b1. When the operator wishes to get off the operation unit 41, he or she pulls up the cutoff lever 41b2 to disable the actuator, and then leaves the cockpit 41a.

2. Notification device
The hydraulic excavator 1 as a work vehicle of this embodiment is equipped with a notification device 100 shown in Fig. 2. Fig. 2 is a block diagram showing a schematic configuration of the notification device 100. The notification device 100 is equipped with a detection unit 50, a notification unit 60, a timing unit 70, a control unit 80, and a storage unit 90.

(2-1. Detection Unit)
The detection unit 50 includes various sensors that detect the riding state of the operator at the control unit 41 (see FIG. 1 ). That is, the notification device 100 includes the detection unit 50 that detects the riding state of the operator.

The detection unit 50 has a seat belt sensor 51, a seating sensor 52, and a cutoff sensor 53. The seat belt sensor 51 detects whether the operator is wearing a seat belt or not. The seat belt sensor 51 outputs a detection signal that is OFF when the operator is wearing the seat belt and is ON when the operator is not wearing the seat belt. This allows the control unit 80 to determine the wearing status (worn/not worn) of the operator's seat belt based on the detection signal from the seat belt sensor 51.

The seating sensor 52 detects whether the operator is seated in the pilot's seat 41a. The seating sensor 52 outputs a detection signal that is OFF when the operator is seated in the pilot's seat 41a and is ON when the operator is not seated in the pilot's seat 41a. This allows the control unit 80 to determine the operator's seating state (seated/not seated) based on the detection signal from the seating sensor 52.

The cutoff sensor 53 detects the rotational position of the cutoff lever 41b2 described above. The cutoff sensor 53 outputs a detection signal that is ON when the cutoff lever 41b2 is pressed down (rotated downward) and is OFF when the cutoff lever 41b2 is pulled up (rotated upward). When the cutoff lever 41b2 is pressed down, the actuator is in a driveable state as described above, so it is considered that the operator is seated in the cockpit 41a. On the other hand, when the cutoff lever 41b2 is pulled up, the actuator is in a non-driveable state, so it is considered that the operator has left the cockpit 41a. Therefore, the control unit 80 can determine whether the operator is in the control unit 41 by determining the rotational position of the cutoff lever 41b2 based on the detection signal from the cutoff sensor 53.

(2-2. Notification Unit)
The notification unit 60 executes a notification process based on the detection result of the detection unit 50. Here, the notification process refers to alerting the operator by issuing a notification. That is, the notification device 100 includes the notification unit 60 that executes a notification process to alert the operator based on the detection result of the detection unit 50. The above-mentioned notification process can be realized, for example, by displaying, issuing an alarm (generating a sound), generating a vibration, or the like.

Such notification processes include a first notification process and a second notification process. The first notification process and the second notification process have different notification levels. Here, the notification level refers to the degree to which the operator is urged to pay attention (degree of attention call). For example, a high notification level refers to a high degree to which the operator is urged to pay attention and there is a high need for notification. On the other hand, a low notification level refers to a low degree to which the operator is urged to pay attention and there is a low need for notification.

In this embodiment, the second notification process has a lower notification level than the first notification process, and is less urging the operator to be careful than the first notification process. That is, the notification process executed by the notification unit 60 includes the first notification process and the second notification process, which has a lower notification level indicating a degree of urging the operator to be careful than the first notification process.

The specific configuration of the alarm unit 60 is described below. The alarm unit 60 has a display unit 61, an alarm unit 62, and a vibration generating unit 63.

<2-2-1. Display section>
The display unit 61 has a monitor 61a and a lamp 61b. The monitor 61a is, for example, a liquid crystal display device that displays images, and is disposed in the vicinity of the pilot's seat 41a in the pilot's seat 41a of the pilot's seat 41a. For example, the monitor 61a displays various information such as images captured by a camera (not shown) mounted on the hydraulic excavator 1, information on operating time, engine speed, etc., as well as information according to the riding state of the operator. .

Figure 3 is an explanatory diagram showing an example of the display screen of the monitor 61a. In this figure, visual information V including icons V1 and V2 is shown in the right-hand area of the display screen. The remaining area of the display screen shows the above-mentioned camera images and various information.

Icon V1 is visual information displayed as information encouraging the operator to fasten the seat belt when the seat belt sensor 51 in FIG. 2 detects that the operator is not fastening the seat belt. Icon V2 is visual information displayed as information encouraging the operator to sit down when the seating sensor 52 in FIG. 2 detects that the operator is not seated in the cockpit 41a. In this way, the monitor 61a displays visual information V according to the detection result of the detection unit 50 in FIG. 2 in the notification process to alert the operator. From this, it can be said that the notification unit 60 has a display unit 61, and the display unit 61 displays visual information V according to the detection result of the detection unit 50 in the notification process.

Figure 4 is an explanatory diagram showing another example of the display screen of the monitor 61a. In the figure, a case is shown in which the display of information encouraging the operator to fasten the seat belt and the display of information encouraging the operator to sit in the cockpit 41a are performed by displaying one type of visual information V. For example, when the operator is notified to fasten the seat belt and when the operator is notified to sit in the cockpit 41a, the blinking speed (time interval between turning on and off) of the displayed visual information V is changed or the display color of the visual information V is changed, so that the above two types of notifications can be distinguished by displaying one type of (common) visual information V. Also, for example, when the operator is notified to fasten the seat belt, notifications of different notification levels can be performed by changing the blinking speed of the displayed visual information V or by changing the display color of the visual information V. It is to be noted that the same visual information V may be used to perform notification processing without distinguishing between the above two types of notifications. Details of the display of the visual information V in the notification processing will be described later.

The lamp 61b shown in FIG. 2 is composed of, for example, an LED (light-emitting diode) that emits multiple colors. By changing the blinking speed of the emitted light or the color of the emitted light when making a notification to encourage the operator to fasten the seat belt and when making a notification to encourage the operator to sit in the cockpit 41a, the two types of notifications can be distinguished. Note that the emitted light may be common and notification processing may be performed without distinguishing between the two types of notifications. Also, for example, when making a notification to encourage the operator to fasten the seat belt, it is possible to make notifications with different levels for each of the two types of notifications by changing the blinking speed of the emitted light or changing the color of the emitted light.

<2-2-2. Reporting Department>
In the notification process, the notification unit 62 issues auditory information according to the detection result of the detection unit 50. The notification unit 62 includes a buzzer 62a that emits sound and an audio output unit 62b that outputs an announcement by voice, that is, a sentence, as an electronic sound. Therefore, the sound emitted by the buzzer 62a and the sound output from the audio output unit 62b constitute the above-mentioned auditory information. For example, when the seat belt sensor 51 detects that the operator is not wearing a seat belt, the notification unit 62 continuously emits a sound of a certain frequency. On the other hand, when the seat sensor 52 detects that the operator is not seated in the cockpit 41a, the notification unit 62 intermittently emits a sound of a certain frequency. This allows the operator to easily recognize the detection result of the detection unit 50 (for example, that the operator is not wearing a seat belt or that the operator is not seated) by hearing the above-mentioned sound (auditory information). It should be noted that the notification process may be performed without distinguishing between the above-mentioned two types of notifications by issuing the same sound.

In addition, even when issuing a warning to encourage the operator to fasten his/her seat belt (or to encourage the operator to take a seat in the cockpit 41a), warnings of different warning levels can be issued by adjusting the frequency or interval of the sound emitted by the buzzer 62a, or by changing the content of the sound output from the audio output unit 62b.

<2-2-3. Vibration generating part>
The vibration generating unit 63 is composed of a vibrator that vibrates the operating lever 41b1 operated by the operator. Note that the vibration here includes both continuous vibration and sporadic vibration (pressure). The vibration generating unit 63 vibrates the operating lever 41b1 in response to the detection result of the detection unit 50 in the notification process.

For example, when the seat belt sensor 51 detects that the operator is not wearing a seat belt, the vibration generating unit 63 vibrates the operating lever 41b1 continuously for a predetermined period. On the other hand, when the seating sensor 52 detects that the operator is not seated in the cockpit 41a, the vibration generating unit 63 vibrates the operating lever 41b1 intermittently for a predetermined period. The vibration of the operating lever 41b1 is physically transmitted to the operator even if the operator is not seated in the cockpit 41a as long as the operator is touching the operating lever 41b1. Therefore, the operator can easily recognize the detection result of the detection unit 50 (for example, that the operator is not wearing a seat belt or that the operator is not seated) by the vibration of the operating lever 41b1.

In addition, even when issuing a notification urging the operator to fasten his/her seat belt (or when issuing a notification urging the operator to take a seat in the cockpit 41a), notifications with different levels of warning can be issued by adjusting the frequency of vibrations generated by the vibration generating unit 63, the interval at which the vibrations occur, etc.

(2-3. Timekeeping Unit, Control Unit, and Storage Unit)
The timing unit 70 measures the notification time during which the notification unit 60 executes the notification process. Such a timing unit 70 is, for example, a timer. That is, the notification device 100 of the present embodiment includes the timing unit 70 that measures the notification time during which the notification unit 60 executes the notification process.

The control unit 80 controls the operation of the alarm device 100 and each part of the hydraulic excavator 1 (see FIG. 1). The control unit 80 is composed of an electronic control unit called an ECU (Electronic Control Unit).

The storage unit 90 is a memory that stores the operation program of the control unit 80 and various information. Such a storage unit 90 is configured to include RAM (Random Access Memory), ROM (Read Only Memory), non-volatile memory, etc.

[3. Examples of visual information display]
Next, examples of visual information displayed on the monitor 61a of the display unit 61 will be described.

Figures 5 to 11 each show an example of the display of icon V1 that prompts the operator to fasten the seat belt. Figure 5 shows the icon V1 in its lit and unlit states. The lighting of icon V1 prompts the operator to fasten the seat belt.

Figure 6 shows icon V1 displayed with different blinking rates. The warning level can be changed by changing the lighting rate of icon V1. In other words, the blinking rate 2, which is faster than the blinking rate 1, which is slower, is more effective at alerting the operator and therefore has a higher warning level. In other words, by increasing the lighting rate of icon V1, the warning level regarding wearing a seat belt can be increased.

Even if the blinking speed of the icon V1 is slow, it is more effective at alerting the operator than if the icon V1 is constantly lit. Therefore, by blinking the icon V1, the level of notification regarding fastening the seat belt can be increased compared to when the icon is simply lit.

Figure 7 shows the state in which icon V1 is displayed with different colors (e.g., hues). More specifically, in light 1, icon V1 is displayed in green, in light 2, icon V1 is displayed in yellow, and in light 3, icon V1 is displayed in red. In general, displaying icon V1 in yellow rather than green, and in red rather than yellow, is more effective at alerting the operator, following the colors that represent traffic signals. Therefore, the warning level increases in the order of green, yellow, and red. In other words, by changing the display color of icon V1, the warning level regarding fastening the seat belt can be changed.

Figure 8 shows the state in which icon V1 is displayed with different brightness (luminance). More specifically, in light 1, icon V1 is displayed darkly (not completely off), in light 3, icon V1 is displayed brightly, and in light 2, icon V1 is displayed with a brightness between light 1 and light 3. The brighter icon V1 is, the easier it is for the operator to see icon V1, and the greater the effect of alerting the operator. Therefore, it can be said that as the brightness of icon V1 increases, the warning level increases. In other words, by changing the brightness of icon V1, the warning level regarding wearing a seat belt can be changed.

In this embodiment, the display color of the icon V1 is changed by changing the hue or brightness, but the display color of the icon V1 may also be changed by changing the saturation. Also, the display color of the icon V1 may be changed by simultaneously changing two or more elements of the hue, saturation, and brightness. In other words, the display color of the icon V1 may be adjusted by changing at least one of the hue, saturation, and brightness.

Figure 9 shows the state in which icon V1 is displayed at different sizes. More specifically, in light 1, icon V1 is displayed small (reduced), in light 3, icon V1 is displayed large (enlarged), and in light 2, icon V1 is displayed at a size between light 1 and light 3. The larger icon V1 is, the easier it is for the operator to see icon V1, and the greater the effect of alerting the operator. Therefore, it can be said that the warning level increases as the size of icon V1 increases. In other words, by changing the size of icon V1, the warning level regarding fastening the seat belt can be changed.

10 shows the state in which the icon V1 is displayed with different shapes. More specifically, in the light 1, the icon V1 is displayed as an illustration (shape A) of the operator seated and fastening the seat belt, in the light 2, the icon V1 is displayed as an illustration (shape B) of the connection part of the seat belt, and in the light 3, the icon V1 is displayed as an illustration (shape C) including the characters "SEAT BELT". In the order of light 1 (shape A), light 2 (shape B), and light 3 (shape C), the operator is more likely to recognize the need to fasten the seat belt when looking at the icon V1. From this, it can be said that the effect of calling the operator's attention increases in the order of light 1 (shape A), light 2 (shape B), and light 3 (shape C), and the notification level increases. In other words, by changing the shape of the icon V1, the notification level regarding fastening the seat belt can be changed.

Figure 11 shows the state in which icon V1 is displayed with or without decoration, or with different decorations. More specifically, in light 1, icon V1 is displayed without decoration, and in lights 2 and 3, icon V1 is displayed with decoration. In this case, the decorations in lights 2 and 3 are different from each other. In particular, the decoration in light 3 is "!!" (decoration A), which is more noticeable than the decoration "!" (decoration B) in light 2. Depending on whether or not decoration is used and the addition of different decorations, the effect of calling the operator's attention increases and the notification level increases in the order of light 1 (no decoration), light 2 (decoration A), and light 3 (decoration B). In other words, the notification level regarding fastening the seat belt can be changed by whether or not decoration is used on icon V1 and the addition of different decorations.

Figures 12 to 18 each show an example of the display of icon V2, which encourages the operator to take a seat in the cockpit 41a. Figure 12 shows the icon V2 in its lit and unlit state. The icon V2 is lit to encourage the operator to take a seat.

Figure 13 shows icon V2 displayed with different blinking rates. The warning level can be changed by changing the lighting rate of icon V2. In other words, the blinking rate 2, which is faster than the blinking rate 1, which is slower, is more effective at alerting the operator and therefore has a higher warning level. In other words, the warning level regarding sitting can be increased by increasing the lighting rate of icon V2.

Even if the blinking speed of the icon V2 is slow, it is more effective at alerting the operator than if the icon V2 is constantly lit. Therefore, by blinking the icon V2, the level of notification regarding seating can be increased compared to when the icon V2 is simply lit.

Figure 14 shows the state in which icon V2 is displayed with different colors (e.g., hues). More specifically, in light 1, icon V2 is displayed in green, in light 2, icon V2 is displayed in yellow, and in light 3, icon V2 is displayed in red. In general, displaying icon V2 in yellow rather than green, and in red rather than yellow, is more effective at alerting the operator, following the colors that represent traffic lights. Therefore, the notification level increases in the order of green, yellow, and red. In other words, the notification level regarding seating can be changed by changing the display color of icon V2.

Figure 15 shows the state in which icon V2 is displayed with different brightness (luminosity). More specifically, in lighting 1, icon V2 is displayed darkly (not completely off), in lighting 3, icon V2 is displayed brightly, and in lighting 2, icon V2 is displayed with a brightness between lighting 1 and lighting 3. The brighter icon V2 is, the easier it is for the operator to see icon V2, and the greater the effect of alerting the operator. Therefore, it can be said that as the brightness of icon V2 increases, the notification level increases. In other words, by changing the brightness of icon V2, the notification level regarding sitting can be changed.

In this embodiment, the display color of the icon V2 is changed by changing the hue or brightness, but the display color of the icon V2 may also be changed by changing the saturation. Also, the display color of the icon V2 may be changed by simultaneously changing two or more elements of the hue, saturation, and brightness. In other words, the display color of the icon V2 may be adjusted by changing at least one of the hue, saturation, and brightness.

Figure 16 shows the state in which icon V2 is displayed at different sizes. More specifically, in light 1, icon V2 is displayed small (reduced), in light 3, icon V2 is displayed large (enlarged), and in light 2, icon V2 is displayed at a size between light 1 and light 3. The larger icon V2 is, the easier it is for the operator to see icon V2, and the greater the effect of alerting the operator. Therefore, it can be said that the notification level increases as the size of icon V2 increases. In other words, by changing the size of icon V2, the notification level regarding sitting can be changed.

17 shows the state in which the icon V2 is displayed with different shapes. More specifically, in the light 1, the icon V2 is displayed as an illustration (shape A) of the cockpit 41a as seen from the left side, in the light 2, the icon V2 is displayed as an illustration (shape B) of the cockpit 41a as seen from the diagonal front, and in the light 3, the icon V2 is displayed as an illustration (shape C) including the characters "SIT DOWN". In the order of light 1 (shape A), light 2 (shape B), and light 3 (shape C), the operator is more likely to recognize the need to sit down when looking at the icon V2. From this, it can be said that the effect of calling the operator's attention increases in the order of light 1 (shape A), light 2 (shape B), and light 3 (shape C), and the notification level increases. In other words, by changing the shape of the icon V2, the notification level regarding sitting down can be changed.

Figure 18 shows the state in which icon V2 is displayed with or without decoration, or with different decorations. More specifically, in light 1, icon V2 is displayed without decoration, and in lights 2 and 3, icon V2 is displayed with decoration. In this case, the decorations in lights 2 and 3 are different from each other. In particular, the decoration in light 3 is "!!" (decoration A), which is more conspicuous than the decoration in light 2, "!" (decoration B). Depending on whether or not there is decoration and the addition of different decorations, the effect of calling the operator's attention increases and the notification level increases in the order of light 1 (no decoration), light 2 (decoration A), and light 3 (decoration B). In other words, the notification level regarding sitting can be changed depending on whether or not there is decoration in icon V2 and the addition of different decorations.

In addition, only icon V1 may be displayed on monitor 61a as visual information V, and two or more types of blinking speed, color (hue, brightness), size, shape, decoration, etc. may be changed in the display of icon V1. In this way, as shown in FIG. 4, by displaying one type of visual information V (for example, without displaying icon V2), it is possible to issue a notification encouraging the driver to fasten his/her seat belt and a notification encouraging the driver to remain seated, and the notification level can be made different for each notification. Details of this point will be described later (see FIG. 23).

4. Notification Processing Operation
Next, the operation of the notification process of this embodiment will be described. Fig. 19 is a flowchart showing an example of the operation of the notification device 100 of this embodiment. Fig. 20 is a timing chart showing the detection signal output from the detection unit 50 and the switching timing of the display on the display unit 61 (monitor 61a) in the operation of Fig. 19.

After the operator gets into the control section 41 and starts the engine of the hydraulic excavator 1, the seating sensor 52 of the detection section 50 detects that the operator is seated in the control seat 41a (S1), the seat belt sensor 51 detects that the seat belt is fastened (S2), and the cutoff sensor 53 detects that the cutoff lever 41b2 is in a position where the actuator can be driven (also referred to here as the "working position") (S3), and then the notification section 60 executes the following notification process under the control of the control section 80.

That is, when the seating sensor 52 detects that the operator has stood up from the cockpit 41a (not seated) or the seat belt sensor 51 detects that the operator has unfastened the seat belt (not fastened) (S4), and a predetermined time has elapsed since the detection point (S6), the notification unit 60 executes the first notification process (S7).

For example, in FIG. 20, at time t3, a predetermined time after the seat belt is detected not being fastened at time t1, the notification unit 60 executes the first notification process. Specifically, the display unit 61a of the notification unit 60 executes the first notification process by flashing the icon V1 in red (see, for example, "Flash 1" in FIG. 6).

In addition, at time t8, a predetermined time after non-seating is detected at time t6, the notification unit 60 executes the first notification process. Specifically, the display unit 61a of the notification unit 60 executes the first notification process by flashing the icon V2 in red (see, for example, "Flash 1" in FIG. 13).

Next, in FIG. 19, the notification unit 60 continues to perform the first notification process until the notification time of the first notification process in S7 has elapsed a predetermined time. Then, when the notification time of the first notification process exceeds the predetermined time (S8), the notification unit 60 executes the second notification process (S9). That is, the notification unit 60 performs the first notification process based on the detection result of the detection unit 50 in S4, and then switches the first notification process to the second notification process. In particular, after performing the first notification process, the notification unit 60 switches the first notification process to the second notification process according to the notification time of the first notification process.

For example, in FIG. 20, the first notification process started at time t3 is switched to the second notification process at time t5, a predetermined time after time t3. Specifically, the display unit 61a of the notification unit 60 executes the second notification process by lighting the icon V1 in red (see, for example, "Lighting 3" in FIG. 7). Also, in FIG. 20, the first notification process started at time t8 is switched to the second notification process at time t10, a predetermined time after time t8. Specifically, the display unit 61a of the notification unit 60 executes the second notification process by lighting the icon V2 in red (see, for example, "Lighting 3" in FIG. 14). That is, the display unit 61 switches the display state of the visual information V (icons V1 and V2) between the first notification process and the second notification process.

After that, when the seating sensor 52 detects that the operator is seated in the cockpit 41a and the seat belt sensor 51 detects that the operator has fastened the seat belt (S14), the notification unit 60 ends the second notification process (S15). For example, in FIG. 20, the seat belt sensor 51 detects that the seat belt has been fastened at time t8, so the display unit 61 turns off (hides) icon V1 at time t8 and ends the second notification process. Similarly, the seating sensor 52 detects that the operator is seated at time t11, so the display unit 61 turns off (hides) icon V2 at time t11 and ends the second notification process.

When the cutoff sensor 53 detects that the cutoff lever 41b2 is in a position where the actuator cannot be driven (also referred to as the "non-operating position" here) (S16), the notification unit 60 ends the notification process. On the other hand, if the cutoff sensor 53 does not detect the non-operating position of the cutoff lever 41b2 in S16, the above-mentioned processes from S4 onwards are repeated.

As described above, after performing the first notification process, the notification unit 60 switches from the first notification process to the second notification process (S7 to S9). In the second notification process (e.g., notification by lighting an icon) the notification level is lower than in the first notification process (e.g., notification by blinking an icon), so the degree of attention given to the operator by the notification is reduced compared to the first notification process. This makes it possible to reduce the annoyance felt by the operator by the notification even if the notification process continues depending on the riding state of the operator. Therefore, it is possible to reduce the situation in which the operator's actions required for work are hindered by the notification. For example, with the engine of the hydraulic excavator 1 running, the operator can remove his/her seat belt or stand up from the operator's seat 41a to visually check the area to be worked on by the hydraulic excavator 1 without feeling much annoyance from the notification.

In particular, in this embodiment, the notification unit 60 switches from the first notification process to the second notification process according to the notification time of the first notification process measured by the timing unit 70 (S7 to S9). In this case, after a certain time has elapsed since the first notification process, the second notification process is automatically executed even without an instruction to switch the notification process by an operator, as described below, thereby improving convenience.

In addition, in the notification process, the display unit 61 of the notification unit 60 displays visual information V (icon V1, icon V2) corresponding to the detection result of the detection unit 50 (see FIG. 3). This allows the operator to easily recognize the detection result of the detection unit 50 by looking at the visual information V displayed on the display unit 61. For example, the operator can easily recognize by looking at the visual information V that the seat belt is not fastened or that the pilot is not seated in the cockpit 41a.

The display unit 61 also switches the display state of the visual information V between the first and second notification processes (see "blinking, lighting" in FIG. 19). This makes it easy to differentiate the degree to which the operator is alerted by the display of the visual information V between the first and second notification processes, that is, the notification level described above.

In particular, the display unit 61 displays the visual information V (icons V1 and V2) in a flashing manner in the first notification process, and displays the visual information V (icons V1 and V2) in a lit manner in the second notification process (see FIG. 19). In this case, in the first notification process, the flashing display of the visual information V relatively increases the level of attention to the operator, making it easier for the operator to recognize the detection result of the detection unit 50. On the other hand, in the second notification process, the lit display of the visual information V relatively decreases the level of attention to the operator, thereby reducing the annoyance experienced by the operator by the notification.

The detection unit 50 also has a seat belt sensor 51 and a seat occupancy sensor 52 (see FIG. 2). The display unit 61 displays icons V1 and V2 corresponding to the detection results of the seat belt sensor 51 and the seat occupancy sensor 52 (see FIG. 3). In other words, the detection unit 50 has multiple sensors that detect different objects, and the display unit 61 displays visual information V for each detection result of each sensor. This allows the operator to easily recognize the detection results of each sensor by looking at the visual information V (icons V1, V2). In other words, the operator can easily recognize whether or not an alarm has been issued for each sensor.

5. Display Examples in the First Notification Process and the Second Notification Process
In the above, an example has been described in which the first and second notification processes are differentiated by whether the visual information V is flashing or illuminated, but the first and second notification processes may also be differentiated by differentiating the color of the displayed visual information V. A specific example will be described below.

For example, the display unit 61 may display the icon V1 in red in the first notification process (see "Light 3" in FIG. 7) and in yellow in the second notification process (see "Light 2" in FIG. 7). The display unit 61 may also display the icon V1 in a relatively bright color in the first notification process (see "Light 3" in FIG. 8) and in a relatively dark color in the second notification process (see "Light 1" in FIG. 8).

Similarly, the display unit 61 may display the icon V2 in red in the first notification process (see "Light 3" in FIG. 14), and in yellow in the second notification process (see "Light 2" in FIG. 14). Also, the display unit 61 may display the icon V2 in a relatively bright color in the first notification process (see "Light 3" in FIG. 15), and in a relatively dark color in the second notification process (see "Light 1" in FIG. 15).

In other words, in these cases, the display unit 61 displays visual information V in a different color in the second notification process than the visual information V displayed in the first notification process.

In this way, when the color of the visual information V displayed in the first notification process is different from that displayed in the second notification process, the operator can easily distinguish and recognize the visual information V displayed in the first notification process from the visual information V displayed in the second notification process. In addition, since it is easy to express differences in notification levels by differences in color (e.g., green, yellow, red, etc. in FIG. 7), it is possible to reliably differentiate the notification levels between the first notification process and the second notification process and reliably realize the second notification process, which has a lower notification level than the first notification process.

The first and second notification processes may be differentiated by varying the form of the displayed visual information V. A specific example is described below. Here, the form of the visual information V includes the shape, size, and presence or absence of decoration (addition/removal) of the visual information V.

For example, the display unit 61 may display the icon V1 largest in the first notification process (see "Light 3" in FIG. 9), and display the icon V1 smallest in the second notification process (see "Light 1" in FIG. 9). The display unit 61 may also display the icon V1 in Light 3 (shape C) in FIG. 10 in the first notification process, and display the icon V1 in Light 1 (shape A) in FIG. 10 in the second notification process. The display unit 61 may also display the icon V1 in Light 3 (decoration B) in FIG. 11 in the first notification process, and display the icon V1 in Light 1 (no decoration) in FIG. 11 in the second notification process.

Similarly, the display unit 61 may display the icon V2 largest in the first notification process (see "Lighting 3" in FIG. 16), and may display the icon V2 smallest in the second notification process (see "Lighting 1" in FIG. 16). Also, the display unit 61 may display the icon V2 in Lighting 3 (shape C) in FIG. 17 in the first notification process, and display the icon V2 in Lighting 1 (shape A) in FIG. 17 in the second notification process. Furthermore, the display unit 61 may display the icon V2 in Lighting 3 (decoration B) in FIG. 18 in the first notification process, and display the icon V2 in Lighting 1 (no decoration) in FIG. 18 in the second notification process.

In other words, in these cases, the display unit 61 displays visual information V in a form different from the visual information V displayed in the first notification process in the second notification process.

In this way, when the form (shape, size, presence/absence/type of decoration) of the visual information V displayed in the first notification process is different from that in the second notification process, the operator can easily distinguish and recognize the visual information V displayed in the first notification process from the visual information V displayed in the second notification process. In addition, since it is easy to express differences in notification levels by differences in form (e.g., shapes A to C in FIG. 10), it is possible to reliably differ the notification levels between the first notification process and the second notification process and reliably realize the second notification process, which has a lower notification level than the first notification process.

[6. Preliminary Notification]
Fig. 21 is a flow chart showing another example of the operation of the alarm device 100 of the present embodiment. Fig. 22 is a timing chart showing the detection signal output from the detection unit 50 and the switching timing of the display on the display unit 61 (monitor 61a) in the operation of Fig. 21. Fig. 21 differs from the operation shown in Fig. 19 in that the third alarm process of S5 is performed before the first alarm process of S7 is performed. Only the differences from Figs. 19 and 20 will be described below.

In S4, when the detection unit 50 detects that the operator is not seated or that the seat belt is not fastened, the notification unit 60 immediately executes the third notification process (S5). That is, the notification unit 60 executes the third notification process as a preliminary notification process before the notification process (the first notification process in S7) based on the detection result of the detection unit 50.

For example, in FIG. 22, when it is detected that the seat belt is not fastened at time t1, the notification unit 60 executes the third notification process. Specifically, the display unit 61a of the notification unit 60 executes the third notification process by lighting up the icon V1 (see, for example, "Lighting 2" in FIG. 7). Also, when it is detected that a passenger is not seated at time t6, the notification unit 60 executes the third notification process. Specifically, the display unit 61a of the notification unit 60 executes the third notification process by lighting up the icon V2 (see, for example, "Lighting 2" in FIG. 14).

Then, when a predetermined time has elapsed from the time of detection by the detection unit 50 in S4 (S6), the notification unit 60 executes the first notification process (S7).

In the first notification process, as described above, the display unit 61 of the notification unit 60 displays the visual information (icons V1 and V2) in a flashing manner. The degree of attention of the operator is higher when the visual information V is displayed in a flashing manner than when it is displayed in a lit manner, and the operator can more easily recognize the visual information V in the latter manner. For this reason, it can be said that the third notification process, in which the visual information V is displayed in a flashing manner, has a lower notification level than the first notification process, in which the visual information V is displayed in a flashing manner.

As described above, the third notification process is executed as a preliminary notification process in S5 before the notification process (first notification process) in S7. This allows the operator to unbuckle his/her seat belt and perform a visual check while being aware in advance that the first notification process may be executed in the future, thereby reducing the confusion of the operator due to the sudden first notification process.

In addition, the third notification process has a lower notification level and a lower degree of warning than the first notification process, which can reduce the annoyance caused to the operator by the preliminary notification of the third notification process.

[7. Display of common visual information]
23 shows a timing chart of the case where the visual information V displayed by the display unit 61 in the notification process (first notification process, second notification process) and the preliminary notification process (third notification process) is displayed as visual information (icon) common to each sensor constituting the detection unit 50. For example, in the flowchart shown in FIG. 21, the display unit 61 displays the icon V1 by lighting it in red in the third notification process of S5 (see, for example, "Lighting 3" in FIG. 7), displays the icon V1 by slowly flashing in red in the first notification process of S7 (see, for example, "Flashing 1" in FIG. 6), and displays the icon V1 by lighting it in red in the second notification process of S9 (see, for example, "Lighting 3" in FIG. 7). Here, it is assumed that the second notification process is executed when at least one of the detection signals of the seat belt sensor 51 and the seating sensor 52 is ON (when at least one of the seat belt not fastened and the seat not being seated is detected by the sensor).

As described above, the detection unit 50 has the seat belt sensor 51 and the seating sensor 52 (see FIG. 2). In this case, the display unit 61 displays the detection results of the seat belt sensor 51 and the seating sensor 52 as common visual information V (e.g., icon V1) (see FIG. 4). In other words, the detection unit 50 has multiple sensors with different detection targets, and the display unit 61 displays the detection results of each sensor as common visual information V. In this configuration, the detection result (not fastened/not seated) by any sensor can be recognized by the operator by displaying a minimum number of pieces of visual information V. Such display of visual information V is very effective when there are certain constraints, such as the display screen of the display unit 61 being small or the display area (space) for the visual information V being limited within the display screen.

[8. Event Identification]
Fig. 24 is a flowchart showing yet another example of the operation of the alarm device 100 of the present embodiment. Fig. 25 is a timing chart showing the detection signal output from the detection unit 50 and the switching timing of the display on the display unit 61 (monitor 61a) in the operation of Fig. 24. Fig. 24 differs from the operation shown in Fig. 21 in that, in the second alarm process of S9, when an event change occurs, that is, when there is a change in the detection result of each sensor of the detection unit 50, the alarm level of the second alarm process is changed so that the change can be identified. Hereinafter, only the points different from Figs. 21 to 23 will be described.

After the alarm unit 60 executes the second alarm process in S9, if there is a change in the detection state of the detection unit 50 (S10), the alarm unit 60 changes the alarm level of the second alarm process in accordance with the detection result (S12). Then, the process from S10 onwards is repeated, and if all detection states of the detection unit 50 change from detection ON to detection OFF in S13, or if there is no change in the detection state for a predetermined period of time in S10, the process proceeds to S14 described above.

For example, from time t5 to t6 in FIG. 25, the seat belt sensor 51 only detects that the seat belt is not fastened (belt detection ON, seated detection OFF). In this case, the display unit 61 of the notification unit 60 displays a green icon V1 as visual information V (see "Light 1" in FIG. 7). At time t6, when the seat sensor 52 further detects that the driver is not seated (belt detection ON, seated detection ON), the display unit 61 displays a red icon V1 as visual information V (see "Light 3" in FIG. 7). By changing the display color of the icon V1 from green to red, the effect of drawing the operator's attention is improved. That is, in this case, the notification level of the second notification process is increased.

At time t8, when the seat belt sensor 51 detects that the seat belt is fastened (belt detection OFF, seating detection ON), the display unit 61 displays a yellow icon V1 as visual information V (see "Light 2" in Figure 7). By changing the display color of the icon V1 from red to yellow, the effect of alerting the operator is reduced. In other words, in this case, the notification level of the second notification process is lowered. At time t13, when the seating sensor 52 detects that a person is seated, the detection state of each sensor in the detection unit 50 becomes the detection OFF state, and the process proceeds to S14.

As described above, the notification unit 60 changes the notification level of the second notification process depending on the detection result by the detection unit 50. This allows the operator to easily recognize that the detection result by the detection unit 50 has changed through the notification by the second notification process (display of visual information V). In other words, the operator can easily identify the event detected by the detection unit 50 through the notification by the second notification process.

9. Notification process when detection state changes
Fig. 26 is a flow chart showing yet another example of the operation of the alarm device 100 of the present embodiment. Fig. 27 is a timing chart showing the detection signal output from the detection unit 50 and the timing of switching the display on the display unit 61 (monitor 61a) in the operation of Fig. 26. Fig. 26 differs from the operation shown in Fig. 24 in that a fourth alarm process is further executed when an event change occurs in the second alarm process of S9. Only the differences from Figs. 24 and 25 will be described below.

After the alarm unit 60 executes the second alarm process in S9, if there is a change in the detection state of the detection unit 50 (S10), the alarm unit 60 executes the fourth alarm process (S11). After that, the alarm unit 60 changes the alarm level of the second alarm process according to the detection result (S12). Then, the process from S10 onwards is repeated, and if all detection states of the detection unit 50 change from detection ON to detection OFF in S13, or if there is no change in the detection state for a predetermined period of time in S10, the process proceeds to S14 described above.

For example, from time t5 to t6 in FIG. 27, the seat belt sensor 51 detects only that the seat belt is not fastened (belt detection ON, seated detection OFF). In this case, the display unit 61 of the notification unit 60 displays a green icon V1 as visual information V (see "Lighting 1" in FIG. 7). At time t6, when the seat sensor 52 further detects that the seat is not seated (belt detection ON, seated detection ON), the display unit 61 causes the icon V1 to flash rapidly as a fourth notification process (see "Flash 2" in FIG. 6). The rapid flashing of the icon V1 significantly increases the effect of drawing the operator's attention. That is, in this case, the fourth notification process significantly increases the level of notification.

After that, at time t7, since there is no change in the detection state of the detection unit 50 from time t6, the display unit 61 displays the red icon V1 as the visual information V as the second notification process (see "Lighting 3" in FIG. 7). The notification level temporarily drops as the icon V1 changes from rapid flashing to a red display, but the notification level is still higher than the second notification process from time t5 to t6.

At time t8, when the seat belt sensor 51 detects that the seat belt is fastened (belt detection OFF, seating detection ON), the display unit 61 causes the icon V1 to flash rapidly again as the fourth notification process (see "Flash 2" in FIG. 6). The rapid flashing of the icon V1 raises the notification level again.

After that, at time t9, since there is no change in the detection state of the detection unit 50 from time t8, the display unit 61 displays the yellow icon V1 as visual information V as the second notification process (see "Lighting 2" in Figure 7). The notification level drops temporarily as the icon V1 changes from rapid flashing to a yellow display, but it is still higher than the second notification process from time t5 to t6. When the seating sensor 52 detects a person sitting at the seat at time t13, the detection state of each sensor in the detection unit 50 all becomes detection OFF, and the process moves to S14.

As described above, when the detection result by the detection unit 50 changes, the notification unit 60 executes a notification process indicating that the detection result has changed as the fourth notification process. This allows the operator to easily recognize that the detection result by the detection unit 50 has changed through the notification by the fourth notification process.

In FIG. 27, the notification level of the fourth notification process is higher than the notification level of the first notification process (see the vertical axis in FIG. 27), but may be the same as the notification level of the first notification process. In other words, in this case, it can be said that the notification level of the fourth notification process is equal to or higher than the notification level of the first notification process. By setting the notification level of the fourth notification process in this manner, the operator can reliably recognize that the detection result by the detection unit 50 has changed through the notification by the fourth notification process.

Figure 28 shows an example of a combination of visual information V (icon V1) displayed on the display unit 61 in the first to fourth notification processes described above. As shown in the figure, by changing the way in which the visual information V is displayed, it is possible to execute a second notification process with a lower notification level than the first notification process. It is also possible to realize a third notification process with a lower notification level than the first notification process. Furthermore, it is possible to realize a fourth notification process with a notification level equal to or higher than the first notification process.

As described above, the hydraulic excavator 1 as a work vehicle in this embodiment is equipped with the above-mentioned notification device 100, the working machine 3 shown in FIG. 1, and the control unit 41. This allows the operator to unbuckle his/her seat belt, stand up from the control seat 41a, and visually check the area being worked on by the hydraulic excavator 1, even when the engine of the hydraulic excavator 1 is running, with almost no annoyance from notifications.

10. Other
In the present embodiment, an example has been described in which the notification unit 60 switches from the first notification process to the second notification process in accordance with the notification time of the first notification process measured by the timing unit 70, but the switching of the notification process is not limited to this example. For example, the notification unit 60 may switch the notification process based on an operation by an operator.

Specifically, the notification unit 60 may switch from the first notification process to the second notification process based on a signal (operation signal) generated when the operator operates the operation lever 41a or a switch (not shown), etc. In this case, for example, an operation signal generated by the amount of operation of the operation lever 41a, the ON/OFF switching of a switch, the amount of volume operation of an accelerator dial (not shown) that changes the engine speed, the screen switching operation of the monitor 61a, etc. is input to the control unit 80, and the notification process is switched in the notification unit 60 based on a control signal from the control unit 80 in response to the above operation signal.

The notification unit 60 may also switch notification processing based on the amount of movement when the work machine 3, etc. is operated by the operator's operation. For example, when the work machine 3 is operated by the operator's operation, a detection signal from an angle sensor or acceleration sensor (neither shown) provided on the boom 31, arm 32, or bucket 33, a detection signal from a pressure sensor (not shown) that detects the pressure of the boom cylinder 31a, arm cylinder 32a, or bucket cylinder 33a, or a detection signal from a stroke sensor (not shown) that detects the extension and contraction of the boom cylinder 31a, arm cylinder 32a, or bucket cylinder 33a is input to the control unit 80, and the control unit 80 recognizes the amount of movement of the work machine 3 based on these detection signals. A control signal based on the amount of movement is input from the control unit 80 to the notification unit 60, and the notification unit 60 can switch notification processing based on the amount of movement.

Alternatively, a changeover switch for switching the notification process may be provided separately, and the operation of this changeover switch may be used as a trigger for the notification unit 60 to switch the notification process. For example, a changeover button capable of switching the notification process may be displayed on the screen of the touch panel monitor 61a, and when the operator presses the changeover button on the screen, the notification unit 60 may switch the notification process. Also, a mechanical changeover button may be provided separately from the monitor 61a, and when the operator presses the changeover button, the notification unit 60 may switch the notification process.

Of course, it is also possible to perform notification processing by appropriately combining the configuration, processing, display, etc. described in this embodiment.

In this embodiment, the work vehicle is described using a hydraulic excavator 1, which is a construction machine, as an example, but the work vehicle is not limited to a hydraulic excavator and may be other construction machines such as a wheel loader. The work vehicle may also be an agricultural machine such as a combine harvester.

The above describes an embodiment of the present invention, but the scope of the present invention is not limited to this, and can be expanded or modified without departing from the spirit of the invention.

The present invention can be used, for example, in construction machinery and agricultural machinery.

1. Hydraulic excavator (work vehicle)
3 Working machine 41 Control unit 50 Detection unit 60 Notification unit 61 Display unit 70 Timer unit 100 Notification device V Visual information

Claims (15)

A detection unit that detects the riding state of an operator;
a notification unit that executes a notification process to alert the operator based on a detection result of the detection unit ,
The notification process includes:
A first notification process;
a second notification process having a lower notification level indicating a degree of alerting the operator than the first notification process,
The notification unit performs the first notification process based on a detection result of the detection unit, and then switches the first notification process to the second notification process;
The notification unit has a display unit,
The display unit displays visual information according to a detection result of the detection unit in the notification process,
The display unit displays visual information in a form different from the visual information displayed in the first notification process in the second notification process . A detection unit that detects the riding state of an operator;
a notification unit that executes a notification process to alert the operator based on a detection result of the detection unit ,
The notification process includes:
A first notification process;
a second notification process having a lower notification level indicating a degree of alerting the operator than the first notification process,
The notification unit performs the first notification process based on a detection result of the detection unit, and then switches the first notification process to the second notification process;
The notification unit has a display unit,
The display unit displays visual information according to a detection result of the detection unit in the notification process,
The detection unit has a plurality of sensors each having a different detection target,
The display unit displays the visual information for each detection result of the sensors . A detection unit that detects the riding state of an operator;
a notification unit that executes a notification process to alert the operator based on a detection result of the detection unit ,
The notification process includes:
A first notification process;
a second notification process having a lower notification level indicating a degree of alerting the operator than the first notification process,
The notification unit performs the first notification process based on a detection result of the detection unit, and then switches the first notification process to the second notification process;
The notification unit executes a third notification process as a preliminary notification process before the notification process based on a detection result of the detection unit . The notification device according to claim 3 , wherein the third notification process has a lower notification level than the first notification process. A detection unit that detects the riding state of an operator;
a notification unit that executes a notification process to alert the operator based on a detection result of the detection unit ,
The notification process includes:
A first notification process;
a second notification process having a lower notification level indicating a degree of alerting the operator than the first notification process,
The notification unit performs the first notification process based on a detection result of the detection unit, and then switches the first notification process to the second notification process;
The notification unit changes the notification level of the second notification process in response to a detection result by the detection unit . A detection unit that detects the riding state of an operator;
a notification unit that executes a notification process to alert the operator based on a detection result of the detection unit ,
The notification process includes:
A first notification process;
a second notification process having a lower notification level indicating a degree of alerting the operator than the first notification process,
The notification unit performs the first notification process based on a detection result of the detection unit, and then switches the first notification process to the second notification process;
The notification unit executes, when a detection result by the detection unit changes, a notification process indicating that the detection result has changed as a fourth notification process. The notification device according to claim 6 , wherein a notification level of the fourth notification process is equal to or higher than a notification level of the first notification process. The detection unit has a plurality of sensors each having a different detection target,
The notification device according to claim 1 , 3 to 7 , wherein the display unit displays the detection results of the sensors using the common visual information. The notification unit has a display unit,
The notification device according to claim 1 , wherein the display unit displays visual information corresponding to a detection result of the detection unit in the notification process. The notification device according to claim 9 , wherein the display unit switches a display state of the visual information between the first notification process and the second notification process. The display unit is
In the first notification process, the visual information is displayed in a flashing manner,
The notification device according to claim 10 , wherein in the second notification process, the visual information is displayed by lighting. The notification device according to claim 9 , wherein the display unit displays, in the second notification process, visual information in a color different from the visual information displayed in the first notification process. A timer unit is provided to measure a notification time for executing the notification process,
The notification device according to claim 1 , wherein the notification unit switches from the first notification process to the second notification process in accordance with the notification time of the first notification process after performing the first notification process. An alarm device according to any one of claims 1 to 13 ,
A work machine for performing work;
A work vehicle comprising: a control unit in which an operation unit for operating the work machine is disposed and in which the operator rides. An alarm device;
A work machine for performing work;
A control section in which an operation section for operating the working machine is disposed and on which the operator rides ;
An actuator for moving the working machine ,
the operation unit includes a cutoff lever that switches the actuator between a drivable state and a non-drivable state,
The notification device includes:
A detection unit that detects the riding state of an operator;
a notification unit that executes a notification process to alert the operator based on a detection result of the detection unit;
A timer unit that measures a notification time for executing the notification process,
The notification process includes:
A first notification process;
a second notification process having a lower notification level indicating a degree of alerting the operator than the first notification process,
When the cutoff lever is in a working position that enables the actuator to be driven, the notification unit performs the first notification process based on the detection result of the detection unit, and then switches the first notification process to the second notification process depending on the notification time of the first notification process.

Images