CN114018383A - Weighing system, scraper and weighing method - Google Patents
Weighing system, scraper and weighing method Download PDFInfo
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- CN114018383A CN114018383A CN202110639964.0A CN202110639964A CN114018383A CN 114018383 A CN114018383 A CN 114018383A CN 202110639964 A CN202110639964 A CN 202110639964A CN 114018383 A CN114018383 A CN 114018383A
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- weighing
- large arm
- controller
- position sensor
- sensor
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- 238000005303 weighing Methods 0.000 title claims abstract description 94
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000009434 installation Methods 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 10
- 238000006073 displacement reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/38—Cantilever beams, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms; Dipper-arms, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms; Bucket-arms
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/425—Drive systems for dipper-arms, backhoes or the like
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention provides a weighing system, a scraper and a weighing method, which relate to the technical field of ore transportation equipment, wherein the weighing system comprises a weighing sensor, a large arm position sensor, a reversing valve and a controller, wherein the large arm position sensor and the reversing valve are connected with the controller; the weighing sensor is used for being arranged on the front frame; the reversing valve is arranged between a rod cavity and a rodless cavity of the large-arm oil cylinder; the large arm position sensor is used for acquiring first in-place information of the large arm and sending the first in-place information to the controller, and the controller is used for receiving the first in-place information and controlling the reversing valve to reverse, so that a rod cavity and a rodless cavity of the large arm oil cylinder are communicated to enable the large arm to be pressed on the weighing sensor. The weighing system provided by the invention gets rid of the traditional weighing mode of independently installing a weighing device in a roadway and adding a pressure transmitter in a lifting oil cylinder, has low installation and operation and maintenance cost, high accuracy and simple operation, and can effectively improve the ore transportation efficiency.
Description
Technical Field
The invention relates to the technical field of ore transportation equipment, in particular to a weighing system, a scraper and a weighing method.
Background
The scraper is the main ore transportation equipment of underground metal mine, and the scraper intellectuality is the inevitable demand of intelligent mine construction. The realization of the autonomous weighing of the ores in the shoveling and loading process is the standard configuration of the intelligent shoveling and transporting machine, the shoveling and transporting machine weighing system with high real-time performance, strong robustness and excellent precision is the important characteristic of the intelligent shoveling and transporting machine, and the real-time and accurate weighing data is the important support for the mine operation and management.
Traditional scraper ore is weighed mainly carries out the ore through installing the weighbridge in the pit and weighs, as shown in fig. 1, fig. 1 is the structure schematic diagram that prior art scraper weighed through the weighbridge. Also, by modifying the original vehicle hydraulic system, a pressure transmitter is added to the original vehicle lift cylinder to realize ore weighing, as shown in fig. 2, fig. 2 is a schematic diagram of ore weighing realized by adding a pressure transmitter in the prior art. The two weighing modes have obvious defects, and the underground weighbridge ore weighing mode needs to independently install the underground weighbridge in a roadway, so that not only can the installation cost and the operation and maintenance cost be generated, but also the ore transportation efficiency can be influenced; the pressure transmitter is added to the original vehicle lifting oil cylinder, and is influenced by proficiency of operators and pose factors of a bucket, so that the accuracy is low and the reliability is poor.
Disclosure of Invention
The invention aims to provide a weighing system, a scraper and a weighing method, which have the advantages of low installation and operation and maintenance cost, high accuracy and simplicity in operation and can effectively improve the ore transportation efficiency.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a weighing system, which comprises a weighing sensor, a large arm position sensor, a reversing valve and a controller, wherein the large arm position sensor and the reversing valve are connected with the controller;
the weighing sensor is used for being arranged on the front frame;
the reversing valve is arranged between a rod cavity and a rodless cavity of the large-arm oil cylinder;
the large arm position sensor is used for acquiring first in-place information of a large arm and sending the first in-place information to the controller, the controller is used for receiving the first in-place information and controlling the reversing valve to reverse, and a rod cavity and a rodless cavity of the large arm oil cylinder are communicated to enable the large arm to be pressed on the weighing sensor.
Further, the reversing valve is an electromagnetic reversing valve.
Further, the boom position sensor is adapted to be mounted on a boom.
The system further comprises a bucket position sensor connected with the controller, wherein the bucket position sensor is used for acquiring second in-place information of the bucket and sending the second in-place information to the controller;
and the controller is used for being connected with the large arm oil cylinder so as to control the large arm to lift according to the second in-place information.
Further, the dipper position sensor is configured to be mounted on a dipper.
Further, the weighing sensor is arranged corresponding to the central line of the large arm.
The invention also provides a scraper which comprises a front frame, a large arm oil cylinder and the weighing system in the scheme;
the weighing sensor is arranged on the front frame;
the reversing valve is arranged between a rod cavity and a rodless cavity of the large arm oil cylinder.
The invention also provides a weighing method, and the weighing system adopting the scheme comprises the following steps:
the large arm position sensor acquires first in-place information of the large arm and sends the first in-place information to the controller;
the controller receives the first in-place information and controls the reversing valve to reverse;
the load cell weighs the weight of the large arm.
Further, before the big arm position sensor gathers the first information of reaching to the position of big arm and sends to the controller, still include:
acquiring second in-place information of the bucket through a bucket position sensor and sending the second in-place information to the controller;
and the controller receives the second in-place information and controls the large arm to lift.
Further, after the weight of the large arm is weighed by the load cell, the method further comprises the following steps:
and the weighing sensor sends the collected weight information to a display.
The weighing system, the scraper and the weighing method provided by the invention have the following beneficial effects that:
when the weighing system is used, after the bucket on the big arm finishes ore shoveling, the big arm returns through a series of lifting operations, the big arm position sensor collects the first in-place information of the big arm, the first in-place information is sent to the controller, the controller controls the reversing valve to reverse so that the rod cavity and the rodless cavity of the big arm oil cylinder are communicated, the big arm oil cylinder is in a floating state at the moment, the big arm is pressed on the weighing sensor, and then the weight of the ore on the big arm can be obtained.
Compared with the prior art, the weighing system provided by the first aspect of the invention gets rid of the traditional weighing mode of independently installing a weighing device in a roadway and adding a pressure transmitter in a lifting oil cylinder, has low installation and operation and maintenance cost, high accuracy and simple operation, and can effectively improve the ore transportation efficiency.
Compared with the prior art, the scraper provided by the second aspect of the invention is convenient for weighing the weight of the ore, has lower requirement on the operation proficiency of operators, and has accurate weighing result and high ore transportation efficiency.
Compared with the prior art, the weighing method provided by the third aspect of the invention has the advantages of low weighing cost, easiness in operation, high accuracy and high reliability, and is not easily influenced by factors such as the proficiency of operators and the position and posture of the bucket.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a prior art scraper weighing by a weighbridge;
FIG. 2 is a schematic diagram of ore weighing realized by adding a pressure transmitter in the prior art;
fig. 3 is a schematic partial structural view of a scraper according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a connection relationship of a reversing valve provided in an embodiment of the present invention;
fig. 5 is a schematic block diagram of a weighing system provided in an embodiment of the present invention.
Icon: 1-tare; 2-a pressure transmitter; 3-a weighing sensor; 4-a large arm position sensor; 5-a reversing valve; 6-a controller; 7-a front frame; 8-large arm oil cylinder; 9-big arm; 10-bucket position sensor; 11-a bucket; 12-tilt cylinders; 13-a working valve group; 14-pilot handle valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically connected or connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
FIG. 1 is a schematic diagram of a prior art scraper weighing by a weighbridge; FIG. 2 is a schematic diagram of ore weighing realized by adding a pressure transmitter in the prior art; fig. 3 is a schematic partial structural view of a scraper according to an embodiment of the present invention; FIG. 4 is a schematic diagram of a connection relationship of a reversing valve provided in an embodiment of the present invention; fig. 5 is a schematic block diagram of a weighing system provided in an embodiment of the present invention.
An embodiment of the first aspect of the present invention provides a weighing system, as shown in fig. 2 to 5, comprising a load cell 3, a boom position sensor 4, a directional valve 5 and a controller 6, wherein the boom position sensor 4 and the directional valve 5 are both connected to the controller 6;
the weighing sensor 3 is used for being arranged on the front frame 7;
the reversing valve 5 is used for being arranged between a rod cavity and a rodless cavity of the large arm oil cylinder 8;
the large arm position sensor 4 is used for acquiring first in-place information of the large arm 9 and sending the first in-place information to the controller 6, the controller 6 is used for receiving the first in-place information and controlling the reversing valve 5 to reverse, and a rod cavity and a rodless cavity of the large arm oil cylinder 8 are communicated to enable the large arm 9 to be pressed on the weighing sensor 3.
According to the weighing system provided by the embodiment of the first aspect of the invention, the weighbridge 1 is not required to be independently installed in a roadway, the pressure transmitter 2 is not required to be added in the lifting oil cylinder, the weighing sensor 3 is arranged externally, and the large arm 9 after the ore shoveling is finished is completely pressed on the weighing sensor 3 on the front rack 7 through the matching of the large arm position sensor 4, the controller 6 and the reversing valve 5, so that the weighing system is low in installation and operation and maintenance cost, high in accuracy and simple to operate, and can effectively improve the ore transportation efficiency.
Wherein, the reversing valve 5 can be an electromagnetic reversing valve 5, a motor reversing valve and the like.
In at least one embodiment, as shown in fig. 4, the directional valve 5 is a solenoid directional valve 5.
Taking fig. 4 as an example to specifically illustrate, when the boom 9 needs to lift and descend, the oil inlet of the reversing valve 5 is not communicated with the oil outlet, and the boom cylinder 8 and the tilt cylinder 12 work normally under the control of the valve bank 13 and the pilot handle valve 14; after the controller 6 receives the first in-place information, the controller 6 controls the reversing valve 5 to reverse, at the moment, an oil inlet and an oil outlet of the reversing valve 5 are communicated, so that a rod cavity and a rodless cavity of the large-arm oil cylinder 8 are communicated, the large-arm oil cylinder 8 is in a floating state, and the large arm 9 is completely pressed on the weighing sensor 3, so that the purpose of measuring the weight of the ore is achieved.
In some embodiments, the boom position sensor 4 is adapted to be mounted on the boom 9.
Specifically in the operation process, the bucket 11 firstly shovels and loads ores, the bucket 11 is retracted after the shoveling and loading is finished, then the large arm 9 is lifted, the scraper retreats to a proper position, then the large arm 9 descends, when the large arm 9 is about to contact with the weighing sensor 3, namely the large arm 9 reaches a preset position, the large arm position sensor 4 collects first in-place information of the large arm 9 and sends the first in-place information to the controller 6, and the controller 6 controls the reversing valve 5 to reverse.
Wherein, the large arm position sensor 4 can be an infrared displacement sensor, a laser displacement sensor, etc.
In some embodiments, in order to ensure that the bucket 11 is retracted to the proper position during weighing, the weighing system further comprises a bucket position sensor 10 connected to the controller 6, wherein the bucket position sensor 10 is used for acquiring second positioning information of the bucket 11 and sending the second positioning information to the controller 6; the controller 6 is used for being connected with the large arm oil cylinder 8 so as to control the large arm 9 to lift according to the second in-place information.
The specific using process is as follows:
after the bucket 11 is used for shoveling ore, the bucket 11 is retracted, when the bucket 11 is retracted to the right position, the bucket position sensor 10 acquires second in-position information of the bucket 11 and sends the second in-position information to the controller 6, and the controller 6 controls the boom 9 to lift.
In some embodiments, the bucket position sensor 10 is configured to be mounted to the bucket 11 to facilitate real-time monitoring of the position of the bucket 11.
The bucket position sensor 10 may be an infrared displacement sensor, a laser displacement sensor, or the like.
In some embodiments, load cell 3 is positioned to correspond to the centerline of large arm 9. When the rod cavity and the rodless cavity of the large arm oil cylinder 8 are communicated through the arrangement, the large arm 9 can be stably pressed on the weighing sensor 3.
The scraper provided by the embodiment of the second aspect of the invention comprises a front frame 7, a large arm 9, a large arm oil cylinder 8 and the weighing system;
the weighing sensor 3 is arranged on the front frame 7;
the reversing valve 5 is arranged between a rod cavity and a rodless cavity of the large arm oil cylinder 8.
The scraper provided by the embodiment of the second aspect of the invention is convenient for weighing the weight of the ore, has lower requirement on the operation proficiency of operators, and has accurate weighing result and high ore transportation efficiency.
In some embodiments, the scraper further comprises a bucket 11, and a bucket position sensor 10 is mounted on the bucket 11 to acquire second-in-position information of the bucket 11 and send the second-in-position information to the controller 6.
An embodiment of the third aspect of the present invention provides a weighing method, including:
the large arm position sensor 4 collects first in-place information of the large arm 9 and sends the first in-place information to the controller 6;
the controller 6 receives the first in-place information and controls the reversing valve 5 to reverse;
the load cell 3 weighs the weight of the large arm 9.
The weighing method provided by the embodiment of the third aspect of the invention has the advantages of low weighing cost, easiness in operation, high accuracy and strong reliability, and is not easily influenced by factors such as the proficiency of operators and the position and posture of the bucket.
In some embodiments, before the boom position sensor 4 collects the first in-position information of the boom 9 and sends the information to the controller 6, the method further comprises collecting the second in-position information of the bucket 11 by the bucket position sensor 10 and sending the information to the controller 6 in order to ensure that the bucket 11 is retracted to the position when weighing; the controller 6 receives the second in-position information and controls the lifting of the upper arm 9.
In some embodiments, after the load cell 3 weighs the weight of the large arm 9, the method further includes: weighing sensor 3 sends the weight information who gathers to the display to the operating personnel record.
The weighing method provided by the embodiment of the third aspect of the present invention is explained in detail below:
1. the bucket 11 carries out ore shoveling;
2. after the shovel loading is finished, the bucket 11 is retracted;
3. when the bucket 11 is retracted to the right position, the bucket position sensor 10 acquires second in-position information of the bucket 11 and sends the second in-position information to the controller 6, and the controller 6 controls the large arm 9 to lift;
4. backing the scraper to a proper position;
5. the large arm 9 gradually descends until the large arm 9 is about to contact the weighing sensor 3, the large arm position sensor 4 collects first in-place information of the large arm 9 and sends the first in-place information to the controller 6, and the controller 6 controls the reversing valve 5 to reverse;
6. the big arm 9 is pressed on the weighing sensor 3, and the weighing sensor 3 weighs.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A weighing system is characterized by comprising a weighing sensor (3), a large arm position sensor (4), a reversing valve (5) and a controller (6), wherein the large arm position sensor (4) and the reversing valve (5) are both connected with the controller (6);
the weighing sensor (3) is used for being mounted on the front frame (7);
the reversing valve (5) is arranged between a rod cavity and a rodless cavity of the large arm oil cylinder (8);
big arm position sensor (4) are used for gathering the first information that targets in place of big arm (9) and send to controller (6), controller (6) are used for receiving first information that targets in place and control switching-over valve (5) switching-over makes the pole chamber and the no pole chamber of having of big arm hydro-cylinder (8) switch on so that big arm (9) pressure is located on weighing sensor (3).
2. Weighing system according to claim 1, characterized in that the directional valve (5) is a solenoid directional valve (5).
3. A weighing system according to claim 2, wherein the boom position sensor (4) is adapted to be mounted on a boom (9).
4. The weighing system according to claim 1, further comprising a bucket position sensor (10) connected to the controller (6), wherein the bucket position sensor (10) is configured to acquire second in-place information of a bucket (11) and send the second in-place information to the controller (6);
the controller (6) is used for being connected with the large arm oil cylinder (8) so as to control the large arm (9) to lift according to the second in-place information.
5. Weighing system according to claim 4, characterized in that the bucket position sensor (10) is intended to be mounted on a bucket (11).
6. A weighing system according to any one of claims 1-5, wherein the load cell (3) is arranged in correspondence with the centre line of the large arm (9).
7. A scraper, characterized by comprising a front frame (7), a boom (9), a boom cylinder (8) and a weighing system according to any of claims 1-6;
the weighing sensor (3) is arranged on the front frame (7);
the reversing valve (5) is arranged between a rod cavity and a rodless cavity of the large arm oil cylinder (8).
8. A weighing method using the weighing system according to any one of claims 1 to 6, comprising:
the large arm position sensor (4) collects first in-place information of the large arm (9) and sends the first in-place information to the controller (6);
the controller (6) receives the first in-place information and controls the reversing valve (5) to reverse;
the load cell (3) weighs the weight of the large arm (9).
9. Weighing method according to claim 8, wherein before the boom position sensor (4) collects the first-in-position information of the boom (9) and sends it to the controller (6), it further comprises:
acquiring second in-place information of a bucket (11) through a bucket position sensor (10) and sending the second in-place information to the controller (6);
the controller (6) receives the second in-place information and controls the lifting of the large arm (9).
10. Weighing method according to claim 8, wherein, after the weighing sensor (3) has weighed the weight of the large arm (9), it further comprises:
and the weighing sensor (3) sends the collected weight information to a display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639964.0A CN114018383B (en) | 2021-06-08 | 2021-06-08 | Weighing system, scraper and weighing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110639964.0A CN114018383B (en) | 2021-06-08 | 2021-06-08 | Weighing system, scraper and weighing method |
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| CN114018383A true CN114018383A (en) | 2022-02-08 |
| CN114018383B CN114018383B (en) | 2024-03-26 |
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| CN202110639964.0A Active CN114018383B (en) | 2021-06-08 | 2021-06-08 | Weighing system, scraper and weighing method |
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| US20090107734A1 (en) * | 2007-10-31 | 2009-04-30 | Bruce Lucas | Sensor for Metering by Weight Loss |
| CN204043764U (en) * | 2014-06-18 | 2014-12-24 | 徐工集团工程机械股份有限公司 | Shovel loader intelligent weighing system |
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| CN106052829A (en) * | 2016-08-22 | 2016-10-26 | 厦门海普智能科技有限公司 | Fork loading truck automatic weighing system and weighing method |
| CN109374099A (en) * | 2018-11-23 | 2019-02-22 | 北京科技大学 | A kind of scraper Dynamic High-accuracy intelligent weighing system |
| CN110144985A (en) * | 2019-05-06 | 2019-08-20 | 柳州柳工挖掘机有限公司 | Digger operating device control system |
| CN111120432A (en) * | 2020-03-05 | 2020-05-08 | 徐州徐工基础工程机械有限公司 | Rotary partition constant-pressure control system and method and tunnel cleaning robot |
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2021
- 2021-06-08 CN CN202110639964.0A patent/CN114018383B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4839835A (en) * | 1984-04-27 | 1989-06-13 | Hagenbuch Roy George Le | Apparatus and method responsive to the on-board measuring of the load carried by a truck body |
| US4839835B1 (en) * | 1984-04-27 | 1994-01-25 | G. Hagenbuch Leroy | |
| CN2467479Y (en) * | 2000-12-11 | 2001-12-26 | 福州铁路分局货运分处 | Loader with intelligent dynamic weight-measuring equipment |
| US20090107734A1 (en) * | 2007-10-31 | 2009-04-30 | Bruce Lucas | Sensor for Metering by Weight Loss |
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| CN106052829A (en) * | 2016-08-22 | 2016-10-26 | 厦门海普智能科技有限公司 | Fork loading truck automatic weighing system and weighing method |
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| CN110144985A (en) * | 2019-05-06 | 2019-08-20 | 柳州柳工挖掘机有限公司 | Digger operating device control system |
| CN111120432A (en) * | 2020-03-05 | 2020-05-08 | 徐州徐工基础工程机械有限公司 | Rotary partition constant-pressure control system and method and tunnel cleaning robot |
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| CN114018383B (en) | 2024-03-26 |
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