CN108387303B - Container empty and heavy box detection mechanism mounted on container special lifting appliance - Google Patents
Container empty and heavy box detection mechanism mounted on container special lifting appliance Download PDFInfo
- Publication number
- CN108387303B CN108387303B CN201810377619.2A CN201810377619A CN108387303B CN 108387303 B CN108387303 B CN 108387303B CN 201810377619 A CN201810377619 A CN 201810377619A CN 108387303 B CN108387303 B CN 108387303B
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- China
- Prior art keywords
- lifting
- container
- pressure
- acquisition device
- pressure acquisition
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- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 title claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 3
- 239000004677 Nylon Substances 0.000 abstract description 2
- 229920001778 nylon Polymers 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- G01G19/14—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads
- G01G19/18—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for weighing suspended loads having electrical weight-sensitive devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a container empty and weight box detection mechanism mounted on a container special lifting tool, which comprises a lifting tool body, L-shaped lifting plates connected to four corners of the bottom of the lifting tool body, and rectangular lifting frames lifted on the four L-shaped lifting plates, wherein pressure acquisition devices are fixedly arranged on the upper end faces of the horizontal parts of the four L-shaped lifting plates, and each pressure acquisition device comprises a bearing support fixedly connected to the horizontal part of the L-shaped lifting plate and two pressure sensors arranged on the bearing support, and the two pressure sensors of each pressure acquisition device are connected with an external detection host. The invention replaces the original nylon buffer cushion of the container special lifting tool with the pressure acquisition device, does not change the structure of the original lifting tool, and when the lifting frame is lifted by the lifting plate, the pressure acquisition device is clamped between the lifting frame and the horizontal part of the L-shaped lifting plate and does not collide with other components or equipment, thereby prolonging the service life of the container special lifting tool.
Description
Technical Field
The invention relates to the field of container loading detection, in particular to a container empty and weight box detection mechanism arranged on a container special lifting appliance.
Background
At present, the detection of the empty and heavy containers of the container adopts the method of installing an F-TR tension sensor and an F-TR pressure sensor on a container lifting appliance. But they all present difficulties in installation and require complete removal of the F-TR lock on the spreader and replacement of either the specially manufactured F-TR tension sensor or F-TR pressure sensor. Moreover, in use, due to shaking, collision, etc. of the device, the F-TR tension sensor or the F-TR pressure sensor is often knocked out, resulting in that the whole detection system cannot be used for normal detection.
Disclosure of Invention
The invention aims to solve the technical problem of providing a container empty and weight box detection mechanism mounted on a container special lifting appliance, which has the advantages of simple structure, convenient installation, difficult damage and long service life.
The technical scheme of the invention is as follows:
Install container empty and weight case detection mechanism on container special lifting device, container special lifting device including the lifting device body, connect in L type hanger plate and the rectangle gallows of four corners in lifting device body bottom, the rectangle gallows hoist and mount on four L type hanger plates of lifting device body, four L type hanger plate horizontal part's up end on all be fixed and be provided with pressure acquisition device, pressure acquisition device including the bearing support of fixed connection on L type hanger plate horizontal part and set up two pressure sensor on the bearing support, two pressure sensor of every pressure acquisition device all are connected with external detection host computer.
The pressure sensor is a spoke type pressure sensor.
The two sensors of each pressure acquisition device are connected with a data acquisition module, and the data acquisition module is connected with a detection host through an analog signal amplifying circuit and an A/D conversion module in sequence.
The bearing support of the pressure acquisition device is welded on the upper end face of the horizontal part of the L-shaped hanging plate.
The invention has the advantages that:
The invention replaces the original nylon buffer cushion with the pressure acquisition device of the invention, does not change the structure of the original lifting appliance, does not influence the normal use of the lifting appliance, and the pressure acquisition device is arranged on the upper end surface of the horizontal part of the L-shaped lifting plate, when the lifting bracket is lifted by the L-shaped lifting plate, the pressure acquisition device is clamped between the lifting bracket and the horizontal part of the L-shaped lifting plate and does not collide with other components or equipment, thereby prolonging the service life of the lifting bracket; the invention obtains the total weight, the unbalanced weight and the unbalanced load condition of the container through the pressure measurement values of different corners of the hanger and the comparison analysis.
Drawings
Fig. 1 is a schematic view of the structure of the present invention mounted on a spreader for container use.
Fig. 2 is a schematic structural view of the pressure acquisition device of the present invention.
Fig. 3 is a functional block diagram of the present invention.
FIG. 4 is a schematic diagram of a mechanical model of a pressure sensor of the present invention.
FIG. 5 is a schematic diagram of the stress distribution of the pressure sensor of the present invention.
FIG. 6 is a circuit diagram of a Wheatstone bridge in a pressure sensor of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The utility model provides a install container empty and weight case detection mechanism on container special lifting device, container special lifting device is including lifting device body 1, connect in L type hanger plate 2 of four corners in lifting device body 1 bottom, and rectangle gallows 3, rectangle gallows 3 hoist on four L type hanger plates 2 of lifting device body, all fixedly on the up end of four L type hanger plates 2 horizontal part be provided with pressure acquisition device 4, pressure acquisition device 4 is including the load bearing support 41 of welding on L type hanger plate 2 horizontal part up end and set up two pressure sensor 42 on load bearing support 41, two pressure sensor 41 of every pressure acquisition device all are connected with data acquisition module 5, data acquisition module 5 loops through analog signal amplifier circuit 6, A/D conversion module 7 is connected with detection host computer 8.
Wherein, the pressure sensor 41 is a spoke type pressure sensor, the sensor precision is 0.1 percent, the detection range is 10 kg-20000 kg, the detection precision of the whole machine is 0.5-0.7 percent, and the working temperature is-20 ℃ to +60 ℃.
The pressure acquisition device 4 acquires pressure measurement values of different corners, and the pressure measurement values are sequentially processed and converted by the data acquisition module 5, the analog signal amplifying circuit 6 and the A/D conversion module 7 and then sent to the detection host 8 for analysis and comparison to obtain the total weight, the unbalanced weight and the unbalanced load of the container.
The mechanical principle of one of the two pressure sensors 41 of the pressure acquisition device 4 is analyzed (the other is identical). The pressure sensor can be simplified into a shear beam or column beam with concentrated load at two ends, and the mechanical model is shown in figure 4.
Stress calculation under the action of intermediate stress load:
and (5) calculating the shear stress and shear strain of the beam:
The shear beam sensor is generally characterized in that two blind holes (I-shaped beams are formed locally) are added at the inflection point of a strain beam, and the shear stress of the shear beam sensor can be calculated by using Ru Lafu Stokes formula:
the location of the strain region and the stress distribution of the local i-beam structure are shown in fig. 5.
In the above, the shearing force QStatic moment S y of cutting section to center axis: /(I)Moment of inertia J y of the shear section to the central axis: /(I)
Then
The main stress and the main strain in the direction of 45 degrees are calculated, the length change of the pressure in the direction of 45 degrees along the Liang Zhongxian axis is the main stress direction under the pure shearing force state, the main stress and the maximum shearing force are calculated, and the main strain and the maximum shearing strain are in the following relation:
Calculating the sensitivity of the pressure sensor:
wherein: k-resistance strain gauge sensitivity coefficient.
Sensor core circuitry-wheatstone bridge:
The designed measuring circuit is a Wheatstone bridge circuit, and is called a measuring bridge for short. The measuring bridge has the advantages of high sensitivity, wide measuring range, simple circuit structure, high precision, easy realization of temperature compensation and the like, so that the requirement of strain measurement can be well met.
The bridge is divided into a direct current bridge and an alternating current bridge according to the nature of the power supply, and when Ui is direct current, the bridge is a direct current bridge, and the bridge circuit is shown in fig. 6.
R is strain gauge impedance, and the sensor deforms when being subjected to external force, so that the strain gauge impedance clinging to the inner wall of the sensor is linearly increased or decreased. In the case of external power (3-12 VDC), the output differential mv signal also increases linearly and decreases, after the sensor passes through the bridge, zeroing, trimming sensitivity, temperature compensation, etc., the output signal = power supply voltage x sensitivity, e.g., regulated power supply is 10VDC, sensor sensitivity is 1.5mv/V, the output voltage at sensor to full scale = 10x1.5 = 15mv, and if a standard analog signal of 0-5V (4-20 mA, etc.) is needed, a signal converter (transmitter) is needed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. Install container empty and heavy case detection mechanism on container special lifting device, its characterized in that: the special lifting appliance for the container comprises a lifting appliance body, L-shaped lifting plates connected to four corners at the bottom of the lifting appliance body and rectangular lifting frames, wherein the rectangular lifting frames are lifted on the four L-shaped lifting plates of the lifting appliance body, pressure acquisition devices are fixedly arranged on the upper end faces of the horizontal parts of the four L-shaped lifting plates, each pressure acquisition device comprises a bearing support fixedly connected to the horizontal parts of the L-shaped lifting plates and two pressure sensors arranged on the bearing support, and each two pressure sensors of each pressure acquisition device are connected with an external detection host;
The pressure sensor is a spoke type pressure sensor;
the two sensors of each pressure acquisition device are connected with a data acquisition module, and the data acquisition module is connected with a detection host through an analog signal amplifying circuit and an A/D conversion module in sequence.
2. A container empty and weight box detection mechanism mounted on a container spreader as claimed in claim 1, wherein: the bearing support of the pressure acquisition device is welded on the upper end face of the horizontal part of the L-shaped hanging plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377619.2A CN108387303B (en) | 2018-04-25 | 2018-04-25 | Container empty and heavy box detection mechanism mounted on container special lifting appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810377619.2A CN108387303B (en) | 2018-04-25 | 2018-04-25 | Container empty and heavy box detection mechanism mounted on container special lifting appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108387303A CN108387303A (en) | 2018-08-10 |
| CN108387303B true CN108387303B (en) | 2024-06-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810377619.2A Active CN108387303B (en) | 2018-04-25 | 2018-04-25 | Container empty and heavy box detection mechanism mounted on container special lifting appliance |
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| Country | Link |
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| CN (1) | CN108387303B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2251661A2 (en) * | 2009-05-15 | 2010-11-17 | Brosa AG | Force measuring device |
| JP2011080801A (en) * | 2009-10-05 | 2011-04-21 | Yamato Scale Co Ltd | Hanging scale |
| CN201819728U (en) * | 2010-03-03 | 2011-05-04 | 郑州恒科实业有限公司 | Container overload and unbalance-load detecting and weighing system device |
| CN106017753A (en) * | 2016-08-03 | 2016-10-12 | 李�诚 | Intelligent detection system for container F-TR lock disengagement |
| CN106644227A (en) * | 2017-02-13 | 2017-05-10 | 李�诚 | Intelligent detection system for ordinary gantry crane container F-TR lock |
| CN208282919U (en) * | 2018-04-25 | 2018-12-25 | 江苏泰力机械科技有限公司 | A kind of container bare weight case testing agency being installed on lifting spreader |
-
2018
- 2018-04-25 CN CN201810377619.2A patent/CN108387303B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2251661A2 (en) * | 2009-05-15 | 2010-11-17 | Brosa AG | Force measuring device |
| DE102009022343A1 (en) * | 2009-05-15 | 2010-12-02 | Brosa Ag | Force measuring system for measuring shear or compressive forces, especially in spreaders |
| JP2011080801A (en) * | 2009-10-05 | 2011-04-21 | Yamato Scale Co Ltd | Hanging scale |
| CN201819728U (en) * | 2010-03-03 | 2011-05-04 | 郑州恒科实业有限公司 | Container overload and unbalance-load detecting and weighing system device |
| CN106017753A (en) * | 2016-08-03 | 2016-10-12 | 李�诚 | Intelligent detection system for container F-TR lock disengagement |
| CN106644227A (en) * | 2017-02-13 | 2017-05-10 | 李�诚 | Intelligent detection system for ordinary gantry crane container F-TR lock |
| CN208282919U (en) * | 2018-04-25 | 2018-12-25 | 江苏泰力机械科技有限公司 | A kind of container bare weight case testing agency being installed on lifting spreader |
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| Publication number | Publication date |
|---|---|
| CN108387303A (en) | 2018-08-10 |
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