JP2017171484A - Remote control terminal of work device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote control terminal which adjusts brightness of a back light according to a posture of the remote control terminal.SOLUTION: The invention relates to a remote control terminal 80 of a work device mounted on a work vehicle. The remote control terminal 80 includes: operation switches 81 to 90 for operating the work device; a display part 91 for displaying information regarding the work device; a back light 92 which illuminates the display part 91; a posture detection part 93 which detects a posture of the remote control terminal 80; and a terminal controller 94 serving as an adjustment part which adjusts brightness of the back light 92 according to the detected posture of the remote control terminal 80.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power saving technique for a remote operation terminal of a work device mounted on a work vehicle.

  Conventionally, a remote operation terminal for remotely operating a work device mounted on a work vehicle including a mobile crane has been used. In recent years, a remote control terminal is provided with a display unit including a liquid crystal display, and numerical information for work is displayed on the display unit.

  On the other hand, when a liquid crystal display is employed, the battery duration often becomes a problem. At present, the backlight of the liquid crystal display is manually switched on and off to achieve both power saving and visibility. However, manually switching the backlight ON / OFF during the operation is troublesome, and there is a possibility that the battery may be exhausted if the backlight is left ON after being forgotten. Since the work is interrupted if the battery runs out during the work, it is an important issue to ensure the battery duration.

  In order to ensure the duration of the battery, for example, in Patent Document 1, a tilt detection unit for a mobile phone, a first timer for setting a time from turning on the backlight to turning it off by detecting an operation, and a tilt detection unit And a second timer that sets the time by detecting a state change due to the above. With such a configuration, the backlight can be turned on using the movement intended by the operator.

Japanese Patent No. 4025752

  However, the mobile phone of Patent Document 1 simply switches the backlight on / off (ON / OFF) based on the change in the tilt angle, and does not change the brightness according to the attitude of the mobile phone. There wasn't. For this reason, the display unit has substantially the same brightness regardless of whether the display unit is difficult to see or easy to see.

  Therefore, an object of the present invention is to provide a remote operation terminal capable of adjusting the brightness of a backlight according to the attitude of the remote operation terminal.

  In order to achieve the above object, a remote operation terminal of a work device mounted on a work vehicle of the present invention, an operation switch for operating the work device, and a display unit for displaying information on the work device A backlight that illuminates the display unit, an attitude detection unit that detects the attitude of the remote operation terminal, and an adjustment unit that adjusts the brightness of the backlight according to the detected attitude of the remote operation terminal; It is equipped with.

  As described above, the remote operation terminal of the work device according to the present invention includes an operation switch, a display unit, a backlight, a posture detection unit, and an adjustment that adjusts the brightness of the backlight according to the posture of the remote operation terminal. And a section. With such a configuration, the brightness of the backlight can be automatically adjusted according to the attitude of the remote control terminal, and both visibility and power saving can be achieved.

It is a side view of a loading type truck crane. It is a block diagram of the control system of a loading type truck crane. It is a front view of a remote control terminal. It is a side view of a remote control terminal. It is a graph which shows the relationship between the angle of a remote control terminal, and the brightness of a backlight.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The remote control terminal according to the present invention can be applied to work vehicles such as a mobile crane, an aerial work vehicle, a wheel loader, and a hydraulic excavator. Examples of the mobile crane include an all terrain crane, a rough terrain crane, a truck crane, and a loading truck crane. Hereinafter, although a load-type truck crane will be described as an example, the remote control terminal according to the present invention can be applied to other work vehicles.

(Overall configuration of load-type truck crane)
First, the configuration of the loadable truck crane CR will be described. As shown in FIG. 1, the load-type truck crane CR is a vehicle in which a small crane 20 is mounted on a vehicle frame 13 between a cab 11 and a loading platform 12 of a general-purpose truck 10.

  The small crane 20 includes a base 21 fixed on the vehicle frame 13, a post 22 provided so as to be turnable with respect to the base 21, and a boom 23 provided on an upper end portion of the post 22 so as to be raised and lowered. ing. A winch is built in the post 22. A wire rope is led from the winch to the tip of the boom 23 and is wound around the hook 24 via a pulley at the tip of the boom 23. These posts 22, boom 23, and hook 24 constitute a crane device.

  Further, the small crane 20 includes outrigger devices 25 and 26 on both the left and right sides of the base 21. Hereinafter, the crane device (post 22, boom 23, hook 24) and outrigger devices 25 and 26 are collectively referred to as “working device”. The small crane 20 is provided with a lever group 27 for operating these working devices on both the left and right sides of the base 21.

(Configuration of hydraulic system and control system)
As shown in FIG. 2, the hydraulic system of the small crane 20 mainly includes a hydraulic valve unit 31, a hydraulic pump 33 that supplies hydraulic oil to the hydraulic valve unit 31 from the tank 32, a hydraulic pump 33, and a hydraulic valve unit. The main oil passage 34 is connected to the hydraulic valve unit 31, the return oil passage 35 is connected to the hydraulic valve unit 31 and the tank 32, and the hydraulic actuators 41 to 46 are connected to the hydraulic valve unit 31.

  The hydraulic valve unit 31 is connected to a boom expansion / contraction hydraulic cylinder 41, a winch hydraulic motor 42, a boom hoisting hydraulic cylinder 43, a swing hydraulic motor 44, and outrigger hydraulic cylinders 45 and 46 as hydraulic actuators. .

  Each switching control valve (not shown) constituting the hydraulic valve unit 31 is provided with a lever, and the direction and flow rate of the pressure oil supplied from the hydraulic pump 33 are switched by manually operating the lever. Can be done. The levers attached to the switching control valve are arranged on the left and right sides of the base 21 as the lever group 27 (see FIG. 1).

  Further, the switching control valve is provided with a pilot cylinder separately from the lever, and the direction and flow rate of the pressure oil supplied from the hydraulic pump 33 can be switched by the operation of the pilot cylinder. ing. Each pilot cylinder is provided with an electromagnetic valve, and the electromagnetic valve is connected to a control device 70 constituted by a known computer or the like. The solenoid valve operates based on a control signal from the control device 70, thereby driving the pilot cylinder and switching the switching control valve. In this way, the control device 70 controls the operation of the work device.

(Remote operation terminal)
The control device 70 is capable of two-way wireless communication or wired communication with the remote operation terminal 80, and the work device can be operated by operating the remote operation terminal 80. As shown in FIGS. 2 and 3, operation switches 81 to 90 such as various switches and levers and a display unit 91 which is a liquid crystal display are arranged on the upper portion of the remote operation terminal 80. The part 91 is illuminated by a backlight 92 from the back. The operation switches include a turn selection switch 81, a undulation selection switch 82, a winch selection switch 83, and an expansion / contraction selection switch 84, a power switch 85, a horn switch 86, a navigation switch 87, a mode selection switch 88, a hook removal switch 89, and a hook storage. A switch 90 and the like are included.

  As shown in FIGS. 2 and 4, the remote operation terminal 80 includes a posture detection unit 93 that detects the posture of the remote operation terminal 80 and a terminal as an adjustment unit that adjusts the brightness of the backlight 92. A controller 94 is disposed. Further, a grip portion 95 for gripping with a hand is disposed below the remote operation terminal 80, and a trigger 96 is disposed on the back side of the remote operation terminal 80. A battery is housed inside the grip portion 95.

  The display unit 91 is a color display or monochrome display liquid crystal display, and displays information on the work apparatus. Information on the working equipment includes hook-in, hook-out, hook horizontal movement, hook parallel movement, low speed / high speed mode, rated load value, actual load value, load factor value, stability limit display, strength limit display and so on. The display unit 91 is illuminated from the back by the backlight 92. Due to the nature of the liquid crystal, the information displayed on the display unit 91 is difficult to read unless the backlight 92 is brightened in order to provide contrast in extremely bright or dark places such as under sunlight. In many cases, the operation switches 81 to 84 and the trigger 96 are operated without looking at the display unit 91.

  The backlight 92 is a light source that illuminates the display unit 91 from the back by a light guide plate method or a direct type method in order to obtain contrast of the display unit 91 that is a liquid crystal display. As the backlight 92, for example, a light bulb, a fluorescent lamp, a light emitting diode, or the like can be used. The brightness of the backlight 92 is adjusted according to the attitude of the remote operation terminal 80 by an adjusting unit described later. Further, the maximum value (MAX) of the brightness of the backlight 92 can be manually adjusted according to the preference of the operator.

  The posture detection unit 93 is a gyroscope (gyro sensor) and is a measuring instrument that detects the angle (posture) of the remote operation terminal 80. The posture detection unit 93 detects an angle between the surface of the display unit 91 and the vertical plane in a plane when the remote operation terminal 80 shown in FIG. 4 is viewed from the side. That is, as shown in the upper part of the graph of FIG. 5, the posture in which the grip portion 95 is up and the display portion 91 is down (the posture in which the upward direction of the display portion substantially coincides with the vertical downward direction = inverted posture). An angle of 0 degrees, an attitude in which the display unit 91 is facing upward, an angle of 90 degrees, an attitude in which the grip unit 95 is down and the display unit 91 is up (the upper direction of the display unit substantially matches the vertical upward direction) Posture = upright posture) is defined as an angle of 180 degrees, and an attitude in which the display unit 91 is facing downward is defined as an angle of 270 degrees.

  The terminal controller 94 as an adjustment unit adjusts the brightness of the backlight 92 according to the detected attitude of the remote operation terminal 80. In other words, the terminal controller 94 operates in the posture of the backlight 92 in a posture in which the operator is likely to look at the display unit 91 according to the angle of the remote operation terminal 80 detected by the posture detection unit 93 that is a gyroscope. The brightness of the backlight 92 is reduced in a posture where the brightness is increased and the operator is not likely to look at the display unit 91.

  Specifically, as shown in the graph of FIG. 5, the terminal controller 94 as the adjustment unit gradually increases the backlight 92 from the minimum value according to the angle of the remote operation terminal 80 and sets the maximum value within a predetermined range. Then, the brightness of the backlight 92 is adjusted with a trapezoidal pattern as a whole by gradually darkening and returning to the minimum value.

  That is, the terminal controller 94 is configured to maximize the brightness of the backlight 92 when the display unit 91 is in an upright posture where the upward direction of the display unit 91 substantially coincides with the vertical upward direction, that is, when the angle is 180 degrees. . Furthermore, the maximum value is maintained in the range of the posture where there is a high possibility that the display unit 91 is viewed, that is, from the angle (180−α) degree to the angle (180 + α) degree. In addition, it is preferable that the maximum value (MAX) and the angle range (2α) can be increased or decreased according to the operator's preference or necessity.

  Further, the terminal controller 94 minimizes the brightness of the backlight 92 when the display unit 91 is in an inverted posture in which the upward direction of the display unit 91 substantially coincides with the vertical downward direction, that is, when the angle is 0 degrees (or 360 degrees). It is like that. Further, the minimum value is maintained in a posture range in which there is a high possibility that the display unit 91 is not viewed, that is, from an angle of 0 ° to an angle of 90 ° and an angle of 270 ° to an angle of 360 °.

  Then, the backlight 92 linearly increases (gradually increases) the brightness from the minimum value to the maximum value according to the angle from the angle 90 degrees to the angle (180-α) degrees. Similarly, the backlight 92 linearly decreases (gradually decreases) the brightness from the angle (180 + α) degrees to the angle 270 degrees from the maximum value to the minimum value according to the angle. It should be noted that the angle 90 degrees and the angle 270 degrees may be increased or decreased according to the operator's preference or necessity.

  Therefore, the backlight 92 is not illuminated (lit) in a posture in which the remote control terminal 80 is suspended from the waist via a strap or the like. Further, even in a posture in which the remote control terminal 80 is actually operated, the grip portion 95 is often on and the display portion 91 is on the bottom, and the backlight 92 is not illuminated even in this posture. On the other hand, the backlight 92 is illuminated in a posture in which there is a high possibility that the remote operation terminal 80 is awake and the display unit 91 is viewed. Further, as the display unit 91 is erected from the horizontal, the brightness of the backlight 92 gradually increases from an angle of 90 degrees to an angle (180-α) degrees, so that the operator can easily see. Further, the brightness of the backlight 92 gradually decreases from an angle (180 + α) degree to an angle of 270 degrees when the display unit 91 is tilted, making it difficult for the operator to see.

(Action / Effect)
Next, effects provided by the remote operation terminal 80 of the working device according to the present embodiment will be listed and described.
(1) As described above, the remote operation terminal 80 of the working device of the present embodiment is the remote operation terminal 80 of the working device mounted on the work vehicle, and an operation switch 81 for operating the working device. ˜90, a display unit 91 that displays information on the work device, a backlight 92 that illuminates the display unit 91, an attitude detection unit 93 that detects the attitude of the remote operation terminal 80, and the detected remote operation terminal 80 And a terminal controller 94 as an adjustment unit that adjusts the brightness of the backlight 92 according to the posture. Due to such a configuration, the brightness of the backlight 92 can be automatically adjusted according to the attitude of the remote control terminal 80 to achieve both visibility and power saving.

(2) Further, the terminal controller 94 as the adjustment unit maximizes the brightness of the backlight 92 in the upright posture in which the upper direction of the display unit 91 substantially coincides with the vertical direction. Since the backlight 92 can be brightened in the posture of the remote control terminal 80 that is likely to be watching the unit 91, power can be saved efficiently. That is, since the operator who views the display unit 81 is considered to view the display unit 81 in an upright posture that substantially matches the upward direction of the display unit 91 with the vertical upward direction, the brightness of the upright posture is maximized. Furthermore, since the maximum value is maintained within a certain range including the upright posture, it is possible to prevent the brightness from changing frequently and becoming difficult to see.

(3) Furthermore, the terminal controller 94 as the adjusting unit minimizes the brightness of the backlight 92 in an inverted posture in which the upper direction of the display unit 91 substantially coincides with the vertically downward direction. Since the backlight 92 can be dimmed in the posture of the remote control terminal 80 that is unlikely to see the unit 91, power can be saved efficiently. That is, it is considered that the operator who operates the operation switches 81 to 90 holds the remote operation terminal 80 in an inverted posture so that the upper direction of the display unit 91 is substantially coincident with the vertical downward direction. The brightness of the inverted posture is minimized. Furthermore, since the minimum value is maintained within a certain range including the inverted posture, it is possible to prevent the brightness from changing frequently and becoming difficult to see.

(4) Furthermore, the terminal controller 94 as an adjustment unit gradually increases the brightness of the backlight 92 from the inverted posture to the upright posture. For this reason, since the backlight 92 becomes brighter as the display unit 91 is more likely to be viewed, the visibility and the power saving can be efficiently balanced. In addition, when the tilt is changed so that the remote control terminal 80 is held by hand, the display unit 91 gradually becomes brighter, so that necessary information can be easily read. Furthermore, since the change in the brightness of the display unit 91 is small, it can be seen without a sense of incompatibility compared with the case where the brightness is suddenly increased.

(5) Furthermore, the terminal controller 94 as an adjustment unit adjusts the brightness of the backlight 92 according to only the attitude of the remote operation terminal 80. For this reason, for example, when an operation is performed without looking at the display unit 91 during work, the backlight 92 is not illuminated, and power can be saved efficiently. In addition, since a timer that illuminates before and after the operation is not used, illumination can be performed only while the display unit 91 is actually being viewed, thereby further improving power saving efficiency.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, in the embodiment, the case where the brightness of the backlight is gradually increased or decreased has been described. However, the present invention is not limited to this, and ON / OFF may be switched according to the angle. it can.

  Although not specifically described in the embodiment, the terminal controller 94 as an adjustment unit can be equipped with a brightness adjustment function by timer control in addition to the brightness adjustment function of the backlight 92 based on the angle. Further, the brightness adjustment function based on the angle and the brightness adjustment function based on the timer control can be combined.

  Furthermore, in the embodiment, it has been described that the brightness is gradually increased from an angle of 90 degrees to an angle (180-α) degrees, but the present invention is not limited to this. For example, the brightness can be gradually increased from an angle of 0 degrees to an angle of 180 degrees. Further, when the angle exceeds 270 degrees, the backlight 92 can be turned off.

CR: Loading truck crane;
10: general purpose truck; 11: cab; 12: loading platform; 13: frame;
81-90: Switch for operation; 91: Display part; 92: Backlight;
93: Posture detection unit; 94: Terminal controller (adjustment unit)

Claims (5)

A remote control terminal for a work device mounted on a work vehicle,
An operation switch for operating the working device;
A display unit for displaying information on the working device;
A backlight for illuminating the display unit;
An attitude detection unit for detecting the attitude of the remote control terminal;
A remote control terminal of a work device, comprising: an adjustment unit that adjusts the brightness of the backlight according to the detected attitude of the remote control terminal.   2. The remote control device according to claim 1, wherein the adjustment unit is configured to maximize the brightness of the backlight in an upright posture in which the upward direction of the display unit substantially coincides with the vertical upward direction. Operation terminal.   3. The remote control device according to claim 2, wherein the adjustment unit is configured to minimize the brightness of the backlight in an inverted posture in which the upper direction of the display unit substantially coincides with the vertical lower direction. Operation terminal.   The remote control terminal for a working device according to claim 3, wherein the adjustment unit gradually increases the brightness of the backlight from the inverted posture to the upright posture. 5. The work device according to claim 2, wherein the adjustment unit is configured to adjust the brightness of the backlight according to only the attitude of the remote control terminal. 6. Remote control terminal.