JP5797901B2 - Fuel consumption display device for crane - Google Patents

Description

  The present invention relates to a crane fuel consumption display device. More specifically, the present invention relates to a crane fuel consumption display device that can prompt a crane operator to drive and operate to reduce fuel consumption.

Generally, a crane can reduce fuel consumption by reducing unnecessary waiting. Here, standby means that the crane is in a no-operation state. More specifically, this means a state in which the boom is not expanded, undulated, jib tilted, winch wound up, lowered, swiveling body swiveled, outrigger extended, stored, or the like.
This is because the crane hydraulic pump is driven even when the crane is not operated when the power take-off device, which is a device for taking out the power for driving the crane hydraulic pump from the engine, is turned on. This is because the fuel is consumed. Actually, when the crane is operated, the fuel consumed in the standby state may occupy half of the whole, leading to waste of fuel.
Also, the fuel efficiency of a crane varies greatly depending on how it is operated. For example, in cylinder reduction work such as boom raising and lowering and boom reduction, the speed does not increase even if the engine speed is increased. Therefore, increasing the engine speed increases the waste of fuel.

Therefore, it is considered that if a fuel display device is provided in the crane, the operator can be urged to drive and operate to reduce fuel consumption.
However, although the fuel display device has an example applied to a general vehicle or an excavator (Patent Document 1), there is no example applied to a crane.

In addition, in order to evaluate the fuel efficiency of crane operation, it is necessary to check the amount of fuel used relative to the amount of crane work.
However, since the conventional fuel display device does not display the amount of work, it has not been possible to evaluate the fuel efficiency.

Japanese Patent Laid-Open No. 2005-989888

  In view of the above circumstances, an object of the present invention is to provide a crane fuel consumption display device that displays a history of fuel consumption during crane work.

A crane fuel consumption display device according to a first aspect of the present invention is a crane fuel consumption display device provided in a mobile crane that takes either a vehicle traveling or crane operation state and is in a standby state or working state during crane operation. the fuel consumption while waiting for the waiting state, an operation in fuel consumption of the working conditions, measuring means for measuring a working average fuel consumption and the amount of work during the crane operation, the waiting measured by said measuring means A fuel consumption table that stores fuel consumption, fuel consumption during operation, average fuel consumption during operation, and amount of work as a history for each arbitrary period; fuel consumption during standby that is stored in the fuel consumption table; fuel consumption during operation; And a monitor for displaying the work average fuel consumption and a history of the work amount.
According to a second aspect of the present invention, the crane fuel consumption display device according to the first aspect of the invention is characterized in that the measuring means includes standby determination means for determining whether or not the crane operation is in a standby state, and fuel consumption detection for detecting fuel consumption of the crane. And a standby consumption fuel calculation means for accumulating the consumed fuel and calculating the standby consumption fuel while the standby determination means determines that the standby determination state is in a standby state from the start of measurement to the present time. The operation fuel consumption calculation means for accumulating the fuel consumption and calculating the fuel consumption during operation while the standby determination means determines that it is not in the standby state from the start of measurement to the present, and the measurement start Measure the working time from time to present, add the operating fuel consumption to the standby fuel consumption, calculate the working fuel consumption, and divide the working time by the working fuel consumption And said work A work average fuel consumption calculating means for calculating a mean fuel consumption, from the time of the start to the current, characterized in that it comprises a workload calculating means for calculating the amount of work.
A crane according to a third aspect of the invention includes the crane fuel consumption display device according to claim 1 or 2.

According to the first aspect of the present invention, the fuel consumption during standby, the fuel consumption during operation, the work average fuel consumption and the work amount are displayed on the monitor, so that the operator confirms the amount of fuel used with respect to the work amount of the crane, It is possible to evaluate good or bad. Further, since the history is displayed, the operator can understand the fuel efficiency of the crane operation by comparing the fuel efficiency in the past operation. Therefore, driving and operation for reducing fuel consumption can be promoted.
According to the second invention, it is possible to measure the standby fuel consumption, the fuel consumption during operation, the work average fuel consumption, and the work amount by the operation of the measuring means.
According to the third aspect of the present invention, the fuel consumption during standby, the fuel consumption during operation, the work average fuel consumption and the work amount are displayed on the monitor, so that the operator confirms the amount of fuel used with respect to the work amount of the crane, It is possible to evaluate good or bad. Further, since the history is displayed, the operator can understand the fuel efficiency of the crane operation by comparing the fuel efficiency in the past operation. Therefore, driving and operation for reducing fuel consumption can be promoted.

It is a block diagram of the fuel consumption display apparatus for cranes concerning one Embodiment of this invention. It is explanatory drawing of a fuel consumption table. It is a screen image of a bar graph display screen. It is a screen image of a table display screen.

Next, an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a crane fuel consumption display device A according to an embodiment of the present invention includes a measuring means 10 that measures standby fuel consumption, operating fuel consumption, average working fuel consumption, and workload, and the measurement thereof. A fuel consumption table 20 that stores the fuel consumption during standby, the fuel consumption during operation, the average fuel consumption during operation, and the work amount measured by the means 10 as a history for each arbitrary period, and the fuel consumption during standby stored in the fuel consumption table 20, And a monitor 30 that displays a history of fuel consumption during operation, average fuel consumption during operation, and amount of work.
The measuring means 10 includes a standby determination means 11, a fuel consumption detection means 12, a standby fuel consumption calculation means 13, an operating fuel consumption calculation means 14, a work average fuel consumption calculation means 15, a work amount calculation means 16, a load detection means. 17 and movement amount detection means 18. Further, the history management means 21 is accessible to the fuel efficiency table 20, and a monitor control means 31 is provided between the fuel efficiency table 20 and the monitor 30.
The crane fuel consumption display device A is provided in various cranes such as a mobile crane. In particular, the monitor 30 is provided in the cab of the crane so that the operator can check the image displayed on the monitor 30.

As shown in FIG. 2, the fuel consumption table 20 has six columns of history number, measurement start date and time, fuel consumption during standby, fuel consumption during operation, work average fuel consumption, and work amount. In addition, the history number has six rows in which numerical values of 0 to 5 are stored. Here, the history number 0 means the present, the history numbers 1 to 5 mean the past history, and the one closer to 1 means the history closer to the present. In the present embodiment, five histories are stored, but the number of stored histories may be more or less than five.
The rows corresponding to the history numbers 0 to 5 store the measurement start date and time, the standby fuel consumption, the fuel consumption during operation, the work average fuel consumption, and the work amount in each history. In addition, the numerical value in FIG. 2 is an illustration.

  The row corresponding to the history number 0 is updated as needed with the values calculated by the standby fuel consumption calculating means 13, the operating fuel consumption calculating means 14, the work average fuel consumption calculating means 15, and the work amount calculating means 16. Details thereof will be described later.

The history management means 21 operates the fuel consumption table 20 and generates rows corresponding to history numbers 1 to 5.
More specifically, a reset button 22 (described later) is input to the history management unit 21. When the reset button 22 is pressed, the history management unit 21 deletes the row of the history number 5, sets the history number 4 to 5, the history number 3 to 4, the history number 2 to 3, and the history number 1 to 2. The history number 0 is updated to 1, respectively. Then, a row with history number 0 is added, the measurement start date and time of that row is set as the date and time when the reset button 22 was pressed, and the standby consumption fuel, operating fuel consumption, work average fuel consumption, and work amount are all 0.
In this way, the history is sequentially updated. Note that, as described above, the standby fuel consumption, operating fuel consumption, work average fuel consumption, and work amount in the row of history number 0 are updated as needed with current values.

Each means which comprises the fuel consumption display apparatus A for cranes is demonstrated based on FIG.
When the crane fuel consumption display device A is provided in a mobile crane, it is necessary to determine whether the crane is in a working state or a traveling state. In this case, it is determined whether or not it is during crane work based on the operation information of the power take-off device of the crane, and each means performs the following operations during crane work.

The standby determination unit 11 determines whether or not the crane work is in a standby state. Here, the standby state means that the crane is in a no-operation state. More specifically, it means that the speeds of boom expansion / contraction, undulation, jib tilt, winch hoisting / lowering, revolving body turning, outrigger extension, storage, etc. are all zero.
The standby determination means 11 is connected to a posture detector that can detect the length, angle, etc. of the boom of the crane, and whether or not it is in a standby state based on the detection result of the posture detector. judge.
Instead of the attitude detector, an operation pressure detector that detects the pilot pressure of the crane hydraulic operation circuit may be used. Although the posture detector has a delay or dead zone in determining the operation, the problem can be reduced by using the operation pressure detector. In the case of electric operation, the no-operation state may be detected by an electric signal of the operation system.
Furthermore, the standby state may be defined as the crane being in an unoperated state and an unloaded state. In this case, in addition to the above-described attitude detector, operation pressure detector, and the like, a detector for detecting a load state is connected to the standby determination means 11.

  The fuel consumption detection means 12 measures the amount of fuel consumed by the crane per unit time (consumed fuel) as needed. For example, the instantaneous fuel consumption obtained from the engine control unit (engine fuel injection amount command value) From this, the fuel consumption is calculated. Alternatively, it may be composed of a sensor for measuring the remaining amount of fuel in the fuel tank and a calculator for calculating the amount of fuel consumed per unit time from the remaining amount of fuel measured by the sensor.

The standby fuel consumption calculation means 13 receives the standby state from the standby determination means 11 and the consumed fuel from the consumption fuel detection means 12. The standby fuel consumption calculation means 13 accumulates the fuel consumption detected by the fuel consumption detection means 12 while the standby determination means 11 determines that the standby determination means 11 is in the standby state from the start of measurement until the present time. Calculate medium fuel consumption. Here, the standby fuel consumption is a cumulative value of the amount of fuel consumed by the crane during standby during crane work.
More specifically, the standby fuel consumption calculation unit 13 refers to the standby fuel consumption in the row corresponding to the history number 0 of the fuel efficiency table 20 while the standby determination unit 11 determines that the standby determination unit 11 is in the standby state. The latest fuel consumption during standby is obtained by adding the fuel consumption detected by the fuel consumption detection means 12 to the value, and the fuel consumption table 20 is updated with the latest fuel consumption during standby. By doing in this way, the waiting fuel consumption of the fuel consumption table 20 can be updated at any time.

A standby state is input from the standby determination unit 11 and fuel consumption is input from the fuel consumption detection unit 12 to the operating fuel consumption calculation unit 14. The operating fuel consumption calculation means 14 accumulates the fuel consumption detected by the fuel consumption detection means 12 while the standby determination means 11 determines that it is not in the standby state from the start of measurement until the present. Calculate fuel consumption. Here, the fuel consumption during operation is a cumulative value of the amount of fuel consumed by the crane during the crane operation.
More specifically, the operating fuel consumption calculation means 14 refers to the operating fuel consumption in the row corresponding to the history number 0 of the fuel efficiency table 20 while the standby determination means 11 determines that it is not in the standby state. The latest fuel consumption during operation is obtained by adding the fuel consumption detected by the fuel consumption detection means 12 to the value, and the fuel consumption table 20 is updated with the latest fuel consumption during operation. By doing in this way, the fuel consumption during operation of the fuel consumption table 20 can be updated at any time.

The work average fuel consumption calculation means 15 refers to the measurement start date and time of the row corresponding to the history number 0 of the fuel consumption table 20, and calculates the work time by subtracting the measurement start date and time from the current date and time. Further, the standby fuel consumption and the operating fuel consumption in the row corresponding to the history number 0 of the fuel efficiency table 20 are referred to, and these are added to calculate the cumulative fuel consumption during operation. Then, the work average fuel consumption is calculated by dividing the work time by the cumulative fuel consumption during work, and the work average fuel consumption of the row corresponding to the history number 0 of the fuel consumption table 20 is updated with the value. Here, the work average fuel consumption is an average fuel consumption from the start of measurement to the present. The work time may be obtained by accumulating the time from the measurement start date and time, and the accumulated fuel consumption during work may be obtained by accumulating the fuel consumption detected by the fuel consumption detection means 12 from the measurement start time to the present time. . The average fuel consumption for work is obtained by dividing the work time by the accumulated fuel consumption during work (min / L), or by dividing the work time spent fuel by the work time (L / min). However, it may be obtained by dividing the amount of crane work by the cumulative fuel consumption during work (tm / L).
The work average fuel consumption calculation means 15 calculates the average fuel consumption from the start of measurement to the present regardless of whether or not the standby determination means 11 determines that it is in the standby state.

  A load detection means 17 and a movement amount detection means 18 are connected to the work amount calculation means 16. The work amount calculating means 16 obtains the work amount by multiplying the actual load (including the load of the hanging tool) detected by the load detecting means 17 and the moving amount detected by the moving amount detecting means 18. Then, the work amount in the row corresponding to the history number 0 of the fuel consumption table 20 is referred to, and the latest work amount is obtained by adding the value and the work amount obtained by the calculation. The table 20 is updated. Here, the work amount is the product of the actual load of the crane's suspended load and the three-dimensional movement amount of the suspended load.

The load detection means 17 detects the actual load (including the load of the suspension tool) of the crane's suspended load.
Further, the movement amount detection means 18 includes sensors for detecting the rotation speed of the winch drum, boom expansion / contraction, undulation, jib expansion / contraction, tilt, and turning of the revolving body. It detects the amount of three-dimensional movement of the load. For example, in order to obtain the movement amount from the rotation speed of the winch drum, the rotation speed of the winch drum is multiplied by the circumference of the winch drum taking into consideration the winding layer of the wire.

  The monitor control unit 21 refers to the fuel consumption table 20 and performs control to display on the monitor 30 the standby consumption fuel, the operating consumption fuel, the work average fuel consumption, and the work amount history stored in the fuel consumption table 20.

Next, an image displayed on the monitor 30 will be described.
As shown in FIG. 3, a bar graph display screen 100 is displayed on the monitor 30. On the bar graph display screen 100, the work average fuel consumption of the row corresponding to the history number 0 of the fuel consumption table 20 is displayed as a current work average fuel consumption 110 as a bar graph, and the work average fuel consumption of the rows corresponding to the history numbers 1 to 5 is displayed. Is displayed in a bar graph as the average work fuel economy 111 to 115 of five histories. Here, the current work average fuel consumption 110 is displayed in black, and the historical work average fuel consumption 111 to 115 is displayed in gray, so that the current and the history can be easily distinguished.
The unit of the work average fuel consumption 110 to 115 may be hour / L, hour / G, min / G, tm / h in addition to min / L. These units may be changed in conjunction with the unit system to be switched depending on the destination of the crane.

In addition, the monitor 20 is common with the monitor of the overload prevention apparatus with which the crane was equipped. Therefore, in the bar graph display screen 100, various types of information on the overload prevention device are displayed in addition to the above information. Information on the overload prevention device includes a rated load 131, a suspended load 132, and a load factor 133. Here, the load factor 133 is a ratio of the suspended load 132 to the rated load 131.
Thus, by making the monitor 20 common with the monitor of the overload prevention device, it is not necessary to provide a plurality of monitors in the cab of the crane, and the operator can obtain a lot of information at a glance. .

  On the vertical axis of the bar graph, measurement start dates 120 to 125 of rows corresponding to history numbers 0 to 5 of the fuel efficiency table 20 are displayed. More specifically, for example, in the case of the work average fuel consumption 111, the bar graph is displayed so as to be sandwiched between the measurement start dates 120 and 121. This is because the measurement start date and time 120 is the measurement start date and time of history number 0 (current work average fuel consumption 110) and the measurement end date and time of history number 1 (the latest work average fuel consumption 111). The case of the work average fuel consumption 112 to 115 of other histories is the same as that of the work average fuel consumption 111. The current work average fuel consumption 110 is displayed so as to be sandwiched between the measurement start date 120 and the current time 126.

The monitor 20 is provided with a reset button 22. When the reset button 22 is pressed, the history management unit 21 operates, a measurement start date and time is newly determined, and a measurement result from the measurement start date and time is displayed as the current work average fuel consumption 110. Also, the work average fuel consumption 111 to 115 in the history is gradually lowered.
Thus, the measurement period can be arbitrarily set by pressing the reset button 22.

When the operator presses a display switching button (not shown), the monitor control means 21 switches the bar graph display screen 100 displayed on the monitor 30 to the table display screen 200 shown in FIG.
In the table display screen 200, the bar graphs of the average fuel consumption 110 to 115 in the bar graph display screen 100 are displayed, the standby consumption fuel 201, the operating fuel consumption 202, the average operation fuel consumption 203, and the workload 204. A table with is displayed. The rest of the configuration is the same as that of the bar graph display screen 100, and various information of the overload prevention device is also displayed.
Note that the unit of the standby fuel consumption 201 and the operating fuel consumption 202 is G (gallon) instead of L (liter), and the unit of work average fuel consumption 203 is hour / G instead of min / L. Also good. These units may be changed in conjunction with the unit system to be switched depending on the destination of the crane.

Also on the table display screen 200, the history management means 21 operates by pressing the reset button 22, and the measurement start date and time is newly determined. The measurement result from the measurement start date and time is the current standby fuel consumption 201, the operation It is displayed as medium consumption fuel 202, work average fuel consumption 203, and work amount 204. Also, the history goes down sequentially.
It should be noted that when any one of the standby fuel consumption 201, the operating fuel consumption 202, the work average fuel consumption 203, and the work amount 204 exceeds a display limit value of 9999, it is the same as when the reset button 22 is pressed. Become.
Furthermore, if the reset button 22 is pressed on one of the bar graph display screen 100 and the table display screen 200, the history is sequentially lowered on both screens.

  Since it is the above structure, the operator can confirm the fuel consumption of the crane operation by checking the amount of fuel used with respect to the amount of work of the crane. In addition, the operator can determine whether the crane operation is good or bad by comparing the fuel consumption in the past operations. Therefore, driving and operation for reducing fuel consumption can be promoted.

DESCRIPTION OF SYMBOLS 10 Measurement means 11 Standby determination means 12 Fuel consumption detection means 13 Standby fuel consumption calculation means 14 Operating fuel consumption calculation means 15 Work average fuel consumption calculation means 16 Work amount calculation means 20 Fuel consumption table 30 Monitor 31 Monitor control means

Claims (3)

A fuel consumption display device for a crane provided in a mobile crane that takes either form of vehicle traveling or crane work and is in a standby state or working state during crane operation,
And fuel consumption while waiting for the waiting state, an operation in fuel consumption of the working conditions, measuring means for measuring a working average fuel consumption and the amount of work during the crane operation,
A fuel consumption table that stores the standby fuel consumption, the operational fuel consumption, the work average fuel consumption, and the work amount measured by the measurement unit as a history for each arbitrary period;
A crane fuel consumption display device comprising: a monitor that displays the standby fuel consumption, the operating fuel consumption, the work average fuel consumption, and the work amount history stored in the fuel consumption table. The measuring means includes
Standby determination means for determining whether or not the crane work is in a standby state;
Fuel consumption detecting means for detecting the fuel consumption of the crane;
A standby consumption fuel calculation means for accumulating the consumed fuel and calculating the standby consumption fuel while determining that the standby determination means is in a standby state from the start of measurement to the present time;
From the start of measurement to the present, while the standby determination means determines that it is not in a standby state, the operating fuel consumption calculating means for calculating the operating fuel consumption by accumulating the fuel consumption,
The working time that is the time from the start of measurement to the present is measured, the operating fuel consumption is calculated by adding the operating fuel consumption to the standby fuel consumption, and the working time is calculated as the working fuel consumption time. Work average fuel consumption calculation means for calculating the work average fuel consumption by dividing by
The crane fuel consumption display device according to claim 1, further comprising work amount calculation means for calculating a work amount from the start of measurement to the present. A crane comprising the crane fuel consumption display device according to claim 1.

Images