JP2012035973A - Loading amount management system and loading amount management method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a system cost and suppress a human error from being generated.SOLUTION: The loading amount management system 10 that manages a loading amount of earth and sand to a dump truck with a backhoe includes an integrating switch 12 that is operated by an operator, an integrating section 24B that integrates each measured loaded amount W1 by one operation to an accumulation loaded amount L if the integrating switch 12 is operated, a loading detection section 24C that detects the loading movements of the earth and sand to the dump truck with the backhoe, and a voice guide device 18 that warns the operator if the integrating switch 12 is not actuated between a period where any detection movement is performed by the loading detection section 24C and the next loading movement.

Description

  The present invention relates to a loading amount management system and a loading amount management method for managing the loading amount of a load on a transport vehicle by a loading device.

  2. Description of the Related Art A loading amount management system that manages loading amounts of earth and sand and minerals loaded on a transport vehicle such as a dump truck by a hydraulic excavator is known (see, for example, Patent Document 1). In the loading amount management system described in Patent Document 1, when a bucket dump operation signal is output when the turning angle of the boom of the excavator is within a predetermined angle range, the load inside the bucket is measured by the load measuring device. The measured load is added to the accumulated value of the loading amount.

JP 2001-91345 A

  Here, in the loading amount management system described in Patent Document 1 in which the measurement and integration of the loading amount of earth and sand loaded on the dump truck is automated, a turning operation detection program, a bucket dump operation detection program, and many other Since a control program is required, control becomes complicated and system cost increases. Therefore, in order to simplify the system, it may be possible to measure and accumulate the amount of sediment, etc. loaded on the dump truck by the operator's operation. Human errors such as mistakes are considered.

  The present invention has been made in view of the above circumstances, and provides a loading amount management system and a loading amount management method capable of reducing the system cost and suppressing the occurrence of a human error.

  In order to solve the above-described problem, a loading amount management system according to the present invention is a loading amount management system that manages a loading amount of a load on a transport vehicle by a loading device, and is operated by an operator. Operating means, holding amount measuring means for measuring the holding amount of the load by the loading device, and loading for detecting the loading operation of the load on the transport vehicle by the loading device A maximum measured value by the holding amount measuring unit before the loading operation is detected by the detecting unit, and the holding amount after the loading operation is detected by the loading detecting unit; A loading amount calculating means for calculating a difference between the minimum measured value by the measuring means, an integrating means for adding the calculated value by the loading calculating means to the accumulated loading amount when the operating means is operated, After the loading operation is detected by the loading detection means When the operating means is not operated within a constant period, and a warning means for warning to the operator.

  In the loading amount management system, the predetermined period may be a period until the measurement value of the holding amount by the holding amount measuring unit becomes a predetermined value or more.

  In the loading amount management system, only when the operation unit is operated during the period from the detection of the loading operation by the loading detection unit to the detection of the next loading operation. A predetermined loading amount may be added to the cumulative loading amount.

  In the loading amount management system, the loading detection unit may detect the loading operation when a value detected by the holding amount detection unit increases by a predetermined value or more and then decreases by a predetermined value or more.

  In addition, the loading amount management system includes an information acquisition unit that acquires information on a maximum amount that can be loaded on the load of the transport vehicle, and a maximum amount that can be loaded that is acquired by the information acquisition unit. The remaining measured amount calculating means for calculating the difference between the accumulated loading amount and the maximum measured value by the holding amount measuring means before the loading operation is detected by the loading operation detecting means is the loading value. And a second warning unit that warns the operator when the calculated value is larger than the value calculated by the remaining amount calculation unit.

  In order to solve the above problems, a loading amount management method according to the present invention is a loading amount management method for managing a loading amount of a load on a transport vehicle by a loading device, A step of measuring a holding amount of the load by the loading device; a step of detecting a loading operation of the load on the transport vehicle by the loading device; and a state before the loading operation is detected The step of calculating the difference between the maximum measured value of the holding amount and the minimum measured value of the holding amount after the loading operation is detected, and is calculated when the operating means is operated by an operator. When the difference between the maximum measured value and the minimum measured value is accumulated in a cumulative loading amount, and when the operating means is not operated within a predetermined period after the loading operation is detected, And a step of warning the operator.

  According to the loading amount management system and the loading amount management method according to the present invention, the system cost can be reduced and the occurrence of a human error can be suppressed.

It is a figure which shows a backhoe and a dump truck. It is a block diagram which shows the structure of a loading amount management system. It is a flowchart for demonstrating the process of a loading amount management system. It is a timing chart which shows the relationship between boom pressure, an integration command signal, and a cumulative loading amount.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a backhoe 100 as a hydraulic excavator and a dump truck 200 on which earth or sand such as construction generated soil or mineral (hereinafter simply referred to as earth and sand) is loaded by the backhoe 100. As shown in this figure, the backhoe 100 includes a traveling body 102, an upper swinging body 104 that is turnably provided on the traveling body 102, a boom 106 attached to the upper swinging body 104, and a tip of the boom 106. An arm 108 attached to the arm 108 and a bucket 110 attached to the tip of the arm 108.

  The backhoe 100 also includes a turning device 112 that turns the upper turning body 104 around a vertical axis, a boom cylinder 114 that rotates the boom 106 around a horizontal axis, and moves the tip side up and down, and an arm 108. An arm cylinder 116 that rotates around the horizontal axis to move the tip side up and down, and a bucket cylinder 118 that rotates the bucket 110 around the horizontal axis and inverts up and down are provided.

  Further, as shown in the upper right in the figure, an operation lever 128, an integration switch 12, a touch panel type display device 16 and a voice guidance device 18 are provided in the cab 101 of the backhoe 100. By operating the operation lever 128 back and forth, right and left, the operation valve for supplying pressure oil to each cylinder is switched, and the backhoe 100 performs the following excavation and loading operations.

  The backhoe 100 excavates the earth and sand at the excavation site with the bucket 110, rotates the upper swing body 104, and moves the bucket 110 over the vessel 202 of the dump truck 200. Then, the backhoe 100 rotates the bucket 110 to a predetermined opening angle with the inside facing downward, and loads the earth and sand into the vessel 202. Thereafter, the backhoe 100 turns the upper swing body 104 to move the bucket 110 to the excavation site, and repeats the above operation. Thereby, earth and sand are loaded on the vessel 202. The dump truck 200 transports the earth and sand to another place when the earth and sand loading is completed.

  Further, the integration switch 12 is a push button type switch, and when the integration switch 12 is operated, in the loading amount management device 20 (see FIG. 2) of the loading amount management system 10 as described later, The amount of one load of earth and sand in the vessel 202 is added to the accumulated amount.

  In addition, the display device 16 functions as a display unit such as displaying the current accumulated load amount and the weight of earth and sand held by the bucket 110, and also operated by an operator when performing various settings. It also functions as a means. Here, the loading amount management device 20 stores information on the vehicle identification number of the dump truck 200 and the maximum loading amount, and as a means for operating the display device 16, a dump for starting the loading of earth and sand. A vehicle selection key 16A for selecting the truck 200 from the registered dump trucks 200 is provided. In addition, as other operation means of the display device 16, the loading start key 16 </ b> B operated by the operator when starting loading of earth and sand into the dump truck 200 and loading of earth and sand into the dump truck 200 are completed. A loading completion key 16C that is operated by the operator when the operation is performed is provided.

  In addition, the voice guidance device 18 guides the remaining loadable amount during loading by voice, warns by voice when the integration switch 12 is not operated at a predetermined timing, or loads one time. When the amount exceeds the remaining loadable amount in the middle of loading, a warning is given by voice.

  The backhoe 100 also includes a turning angle sensor 120 that detects the turning angle of the upper turning body 104, a boom angle sensor 122 that detects the angle of the boom 106, an arm angle sensor 124 that detects the angle of the arm 108, and a bucket 110. A bucket angle sensor 126 for detecting the angle of the bucket cylinder 118, and a bucket pressure sensor 127 for detecting the pressure of the bucket cylinder 118.

  FIG. 2 is a block diagram illustrating a configuration of the loading amount management system 10. As shown in this figure, the loading amount management system 10 includes the loading amount management device 20, the integration switch 12, the display device 16, and the voice guidance device 18.

  The loading amount management device 20 stores an input interface 22 for inputting various signals, a processing device 24 for executing various calculations and processing, a RAM 26 for storing calculation results and the like, and a loading amount management program. A ROM 28 and an output interface 30 for outputting various data are provided.

  The input interface 22 includes a bucket pressure signal Pb output from the bucket pressure sensor 127, an operation signal (hereinafter referred to as an integration command signal) I of the integration switch 12, a loading start key 16B output from the display device 16, and loading completion. An operation signal of the key 16C (hereinafter referred to as a loading start signal S and a loading completion signal F), a vehicle identification number N, and a maximum loading amount ML are input.

  The processing device 24 includes a loading amount calculation unit 24A, an accumulation unit 24B, a loading detection unit 24C, a first warning signal generation unit 24D, a remaining load calculation unit 24E, and a second warning signal generation unit 24F. This is realized by the CPU reading the loading amount management program from the ROM 28 and executing the processing described later.

  To describe the outline of the processing, the loading amount calculation unit 24A detects the maximum value Pbu of the bucket pressure Pb before the loading operation of the bucket 110 is detected by the loading detection unit 24C and the loading operation. A difference W1 with the minimum value Pbl of the subsequent bucket pressure Pb is calculated. In addition, the accumulation unit 24B, when the integration switch 12 is operated and the integration command signal I is input, the accumulated amount L1 stored in the RAM 26 is stored in the RAM 26 with the amount W1 calculated by the amount calculating unit 24A. And the cumulative load L is updated. In addition, the loading detection unit 24C reduces the predetermined value Pb0 or more after the maximum value Pbu of the bucket pressure Pb has increased by a predetermined value Pb0 that is larger than the zero point (output value when the intake amount of the bucket 110 is zero). In such a case, the loading operation of the bucket 110 is detected.

  In addition, the first warning signal generation unit 24D does not operate the integration switch 12 after the backhoe 100 loads the earth and sand onto the dump truck 200 until the next loading operation is performed. If this happens, the warning command signal WA1 is generated. Further, the remaining load calculation unit 24E calculates the difference (ML−L) between the maximum load amount ML and the accumulated load amount L, that is, the remaining loadable amount W2. Further, the second warning signal generation unit 24F generates a warning command signal WA2 when the maximum value Pbu of the bucket pressure is larger than the calculated value (ML-L) by the remaining charge calculation unit 24E.

  The output interface 30 includes a maximum value Pbu of the bucket pressure, a loading amount W1 calculated by the loading amount calculation unit 24A, a cumulative loading amount L updated by the integration unit 24B, and a remaining load calculation unit 24E. The remaining loadable amount W2 calculated by the above is output to the display device 16. Further, the output interface 30 outputs the warning command signal WA1 generated by the first warning signal generation unit 24D and the warning command signal WA2 generated by the second warning signal generation unit 24F to the voice guidance device 18.

  FIG. 3 is a flowchart for explaining processing of loading amount management. As shown in this flowchart, in this processing routine, first, in step 100, it is determined whether or not the processing device 24 has received vehicle identification information including the vehicle identification number N of the dump truck 200 and the maximum loading amount ML. If the determination is affirmative, the routine proceeds to step 101. In step 101, the processing device 24 stores the vehicle identification number N and the maximum loading amount ML in the RAM 26.

  Next, in step 102, the processing device 24 determines whether or not the loading start signal S has been received. If the determination is affirmative, the processing proceeds to step 103. In this step 102, it is determined whether or not the loading start key 16B of the display device 16 has been operated by the operator. Thereafter, the operation lever 128 is operated by the operator, and the earth and sand are crushed by the bucket 110.

  In step 103, the processing device 24 (the remaining load calculation unit 24E) calculates the difference (ML−L) between the maximum load amount ML and the accumulated load amount L stored in the RAM 26, and the calculated value. It is determined whether (ML-L) is larger than the maximum value Pbu of the bucket pressure Pb. As a result, when a negative determination is made, the process proceeds to step 112, whereas when an affirmative determination is made, the process proceeds to step 104. In this step 103, it is determined whether or not the amount of earth and sand for the bucket 110 exceeds the remaining loadable amount W2 in the middle of loading.

  In step 112, the processing device 24 (second warning signal generation unit 24F) generates a warning command signal WA2, and the output interface 30 outputs the generated warning command signal WA2 to the voice guidance device 18. The voice guidance device 18 warns the operator by voice. As a result, the operator recognizes that the amount of earth and sand that has been poured into the bucket 110 exceeds the remaining loadable amount W2 in the middle of loading, and stops the loading operation. . Then, the process proceeds to step 109.

  In step 104, the processing device 24 (loading detection unit 24 </ b> C) determines whether or not the maximum value Pbu of the bucket pressure Pb output from the bucket sensor 127 is equal to or greater than a predetermined value Pb <b> 0 greater than the zero point. If so, the process proceeds to step 105. In step 104, it is determined whether or not earth and sand has been crushed by the bucket 110. Thereafter, the operation lever 128 is operated by the operator, the bucket 110 is moved onto the vessel 202 of the dump truck 200, and earth and sand are loaded from the bucket 110 onto the vessel 202. Further, the operation lever 128 is operated by the operator, and the bucket 110 performs an operation of shaking off the attached earth and sand.

  Next, in step 105, the processing device 24 (loading detection unit 24C) determines whether or not the minimum value Pbl of the bucket pressure Pb output from the bucket pressure sensor 127 is less than the predetermined value Pb0. If so, the process proceeds to step 106. In this step 105, it is determined whether or not earth and sand have been loaded from the bucket 110 into the vessel 202.

  Next, in step 106, the processing device 24 determines whether or not the integration command signal I has been received. If an affirmative determination is made, the process proceeds to step 107, whereas if a negative determination is made, the process proceeds to step 113. Transition. In this step 106, it is determined whether or not the integration switch 12 has been operated by the operator since earth and sand have been loaded from the bucket 110 into the vessel 202.

  In step 107, the processing device 24 (loading amount calculation unit 24A) calculates a difference (that is, a loading amount) W1 between the maximum value Pbu of the bucket pressure Pb in step 104 and the minimum value Pbl of the bucket pressure Pb in step 105. Calculate. Then, the processing device 24 (accumulation unit 24B) accumulates the calculated loading amount W1 on the accumulated loading amount L stored in the RAM 26. At this time, the output interface 30 outputs the maximum value Pbu and the calculated loading amount W1 and the updated cumulative loading amount L to the display device 16, and the display device 16 multiplies the input maximum value Pbu and the product. The loading amount W1 and the cumulative loading amount L are displayed. Next, the process proceeds to step 108.

  On the other hand, in step 113, the processing device 24 (load detection unit 24C) determines whether or not the maximum value Pbu of the bucket pressure Pb output from the bucket pressure sensor 127 is equal to or greater than a predetermined value Pb0 that is greater than the zero point. . As a result, if an affirmative determination is made, the process proceeds to step 114, while if a negative determination is made, the process proceeds to step 106. In step 113, it is determined whether or not earth and sand has been crushed by the bucket 110.

  In step 114, the processing device 24 (first warning signal generation unit 24D) generates a warning command signal WA1. The output interface 30 outputs the generated warning command information WA1 to the voice guidance device 18, and the voice guidance device 18 warns the operator by voice. Thereafter, the process proceeds to step 106.

  In step 108, the processing device 24 (the remaining load calculation unit 24E) determines the difference (ML−L) between the maximum load amount ML and the accumulated load amount L stored in the RAM 26, that is, the remaining load. The possible amount W2 is calculated. The output interface 30 outputs the calculated remaining loadable amount W2 to the display device 16 and the voice guidance device 18. The display device 16 displays the remaining loadable amount W2, and the voice guidance device 18 notifies the operator of the remaining loadable amount W2 by voice.

  Next, in step 109, the processing device 24 determines whether or not the loading completion signal F has been received. As a result, when an affirmative determination is made, the process proceeds to step 110, while when a negative determination is made, the process proceeds to step 103.

  In step 110, the processing device 24 generates information including the vehicle identification number N, the accumulated loading amount L, and the loading date and time, and the output interface 30 outputs the generated information to a communication server (not shown). Then, the printing device connected to the communication server prints information including the vehicle identification number N, the accumulated loading amount L, and the loading date and time. Next, in step 111, the processing device 24 resets the cumulative loading amount L stored in the RAM 26. This ends the processing routine.

  As described above, in the loading amount management system 10 according to the present embodiment, when the accumulation switch 12 is operated after the earth and sand are crushed by the bucket 110 and loaded into the vessel 202 of the dump truck 200, the accumulated loading of earth and sand is performed. The measured loading amount W1 is added to the amount L (steps 104 to 107). On the other hand, if the accumulation switch 12 is not operated during the period from when the earth and sand are crushed by the bucket 110 and loaded into the vessel 202 of the dump truck 200 until the next loading is started, accumulation of earth and sand is performed. The operator is warned by voice without updating the loading amount L (steps 104 to 106, 113, 114).

  As a result, the accumulated load L of earth and sand can be managed with a simple control program and simple information processing, the system cost can be reduced, and the occurrence of a human error such as forgetting to operate the integration switch 12 is suppressed. it can.

  By the way, it is conceivable that the accumulation switch 12 is operated twice by the operator after the earth and sand are loaded from the bucket 110 into the vessel 202 until the earth and sand is beaten by the bucket 110. Here, as shown in the timing chart of FIG. 4, in the loading amount management system 10 according to the present embodiment, the accumulated loading amount L of earth and sand is updated when the earth and sand is beaten by the bucket 110. This is limited to the case where the integration switch 12 is operated after the pressure Pb increases by a predetermined value Pb0 or more and then the earth and sand are loaded from the bucket 110 into the vessel 202 and the bucket pressure Pb decreases by the predetermined value Pb0 or more (step) 104-107). For this reason, the accumulation load L of earth and sand is updated only by the first operation of the integration switch 12 and not by the second operation (part A in the timing chart of FIG. 4). reference).

  In addition, it is conceivable that the accumulation switch 12 is operated by an operator before the earth and sand are crushed by the bucket 110 and before being loaded into the vessel 202 from the bucket 110. However, in the loading amount management system 10 according to the present embodiment, the bucket pressure Pb is increased by the predetermined value Pb0 or more by the earth and sand being beaten by the bucket 110, and then the earth and sand is loaded from the bucket 110 into the vessel 202. Only when the integration switch 12 is operated after the bucket pressure Pb has decreased by a predetermined value Pb0 or more (steps 104 to 107). Therefore, the update of the accumulated load L of earth and sand is not executed when the integration switch 12 is operated before the earth and sand are loaded from the bucket 110 into the vessel 202 (B in the timing chart of FIG. 4). Section).

  Therefore, it is possible to prevent the accumulated load L of earth and sand from being erroneously updated due to an operator's erroneous operation of the integration switch 12.

  In addition, in the load amount management system 10 according to the present embodiment, the remaining loadable amount W2 that is the difference (ML−L) between the maximum load amount ML and the accumulated load amount L is calculated, and the remaining load amount is calculated. The operator can be notified of the loadable amount W2 by display or voice, or if the amount of earth and sand in the bucket 110 is larger than the remaining loadable amount W2, a warning may be given by display or voice. (Steps 103 and 112). Thereby, the overloading of the earth and sand to the vessel 202 can be prevented.

  In this embodiment, as a method for recognizing the vehicle identification number N and the maximum loading amount ML of the dump truck 200, a vehicle identification number or the like is registered in the RAM 26 in advance, and the registered vehicle identification number is selected from the registered vehicle identification numbers. The method of letting an operator select the applicable vehicle identification number was used. However, for example, a wireless tag such as an RFID tag storing a vehicle identification number or the like is attached to the dump truck 200, and a wireless tag reader such as an RFID reader is installed in the backhoe 100, and the wireless tag is read by the wireless tag reader. A method of reading vehicle identification information or the like stored in the vehicle may be used. In this case, in addition to the recognition of the vehicle identification information or the like, the stop position of the dump truck 200 can also be detected, and the detection result of the stop position can be used for various controls. Further, even when earth and sand are loaded on a plurality of dump trucks 200 with one backhoe 100, the loading amount can be managed for each dump truck 200.

  In the present embodiment, the operation is performed when the integration switch 12 is not operated within the period from when the backhoe 100 loads the earth and sand to the dump truck 200 until the next loading operation is performed. Warn employees. However, the operator may be warned when the integration switch 12 is not operated within a predetermined time after the operation of loading earth and sand into the dump truck 200 by the backhoe 100 is completed.

  In the present embodiment, when the operator forgets to operate the integration switch 12 or when the amount of earth and sand in the bucket 110 exceeds the remaining loadable amount W2, the voice is sent to the operator. However, it may be warned by a buzzer, a warning light, a warning display, or the like, or a combination of these may be warned.

  In the present embodiment, the present invention has been described by taking as an example the loading of earth and sand into the dump truck 200 by the backhoe 100 equipped with the bucket 110 as an attachment. However, the present invention can also be applied to loading dismantled materials, timber, and the like onto a transport vehicle using a hydraulic excavator equipped with a grapple as an attachment.

10 loading amount management system, 12 integration switch (operation means), 16 display device, 18 voice guidance device (warning means, second warning means), 20 loading amount management device, 22 input interface (information acquisition means), 24 processing unit, 24A loading amount calculation unit (loading amount calculation unit), 24B accumulation unit (accumulation unit), 24C loading detection unit (loading detection unit) 24D first warning signal generation unit (warning unit), 24E Load remaining amount calculation section (load remaining amount calculation means), 24F second warning signal generation section (second warning means), 26 RAM, 28 ROM, 30 output interface, 100 backhoe (loading device), 102 travel Body, 104 upper swing body, 106 boom, 108 arm, 110 bucket, 112 swivel device, 114 boom cylinder, 116 arm cylinder, 118 Bucket cylinder, 120 turning angle sensor, 122 boom angle sensor, 124 arm angle sensor, 126 bucket angle sensor, 127 bucket pressure sensor (holding amount measuring means), 128 operation lever, 200 dump truck (conveying vehicle), 202 vessel

Claims (6)

A loading amount management system for managing a loading amount of a load on a transport vehicle by a loading device,
Operating means operated by an operator;
Holding amount measuring means for measuring the holding amount of the load by the loading device;
Loading detection means for detecting loading operation of the load on the transport vehicle by the loading device;
The maximum measured value by the holding amount measuring unit before the loading operation is detected by the loading detecting unit, and the minimum value by the holding amount measuring unit after the loading operation is detected by the loading detecting unit. Load amount calculation means for calculating the difference from the measured value,
When the operation means is operated, an integration means for integrating the operation value by the load operation means with an accumulated load amount;
Warning means for warning the operator when the operation means is not operated within a predetermined period after the loading operation is detected by the loading detection means;
Loading volume management system comprising.   The loading amount management system according to claim 1, wherein the predetermined period is a period until a measured value of the holding amount by the holding amount measuring unit becomes a predetermined value or more.   Only when the operation means is operated after the loading operation is detected by the loading detection means until the next loading operation is detected, the operation value by the loading operation means is calculated. The load management system according to claim 1 or 2, wherein the load is integrated with the accumulated load.   4. The load detection unit according to claim 1, wherein the load detection unit detects the loading operation when a measured value by the holding amount measuring unit increases by a predetermined value or more and then decreases by a predetermined value or more. Loading amount management system as described in the item. Information acquisition means for acquiring information on a maximum amount of the load of the transport vehicle that can be loaded;
A remaining charge calculation means for calculating a difference between the maximum loadable amount acquired by the information acquisition means and the cumulative load amount;
A warning is given to the operator when the maximum measured value by the holding amount measuring unit before the loading operation is detected by the loading operation detecting unit is larger than the calculated value by the remaining load calculating unit. A second warning means,
The loading amount management system according to any one of claims 1 to 4, further comprising: A loading amount management method for managing a loading amount of a load on a transport vehicle by a loading device,
Measuring a holding amount of the load by the loading device;
Detecting the loading operation of the load on the transport vehicle by the loading device;
Calculating the difference between the maximum measured value of the holding amount before the loading operation is detected and the minimum measured value of the holding amount after the loading operation is detected;
A step of adding the difference between the calculated maximum measurement value and the minimum measurement value to a cumulative loading amount when the operating means is operated by an operator;
Warning the operator if the operating means is not operated within a predetermined period after the loading operation is detected;
A load management method comprising:

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