CN113321138B - Method and system for measuring weight of tower crane - Google Patents
Method and system for measuring weight of tower crane Download PDFInfo
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- CN113321138B CN113321138B CN202110515893.3A CN202110515893A CN113321138B CN 113321138 B CN113321138 B CN 113321138B CN 202110515893 A CN202110515893 A CN 202110515893A CN 113321138 B CN113321138 B CN 113321138B
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- weight
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- wire rope
- steel wire
- sensor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/16—Applications of indicating, registering, or weighing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/48—Automatic control of crane drives for producing a single or repeated working cycle; Programme control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention relates to a method and a system for measuring the weight of a tower crane, and belongs to the field of tower cranes. The system is an intelligent measuring and calculating system integrating a display screen, a PLC and a weight sensor, and the system needs to be additionally provided with a programmable display screen, a weight measuring pulley and the weight sensor on the conventional tower crane system, wherein the weight measuring pulley is arranged at the position of a trolley with a control range; the weight measuring method of the tower crane can accurately measure and calculate and display the weight of a hoisted object. The invention has convenient operation, safety and reliability, can accurately measure and calculate and display the weight of the hoisted object, and meets the use requirement.
Description
Technical Field
The invention relates to a method and a system, in particular to a method and a system for measuring the weight of a tower crane, and belongs to the field of tower cranes.
Background
The existing tower crane system does not have a method and a system for accurately measuring and displaying the weight of a hoisted object, and the system is designed on the basis of the function that the weight limit characteristic of the tower crane or the weight of the hoisted object can be displayed at any time and is an urgent technical problem.
Therefore, it is particularly necessary to provide a method and a system for measuring the weight of a tower crane, which are convenient to operate and can accurately measure and display the weight of a suspended object.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the weight measuring method and the weight measuring system of the tower crane, which are convenient to operate, safe and reliable and can accurately measure and calculate and display the weight of a hoisted object.
The technical scheme adopted by the invention for solving the problems is as follows: the weight measuring method of the tower crane is characterized in that: the method comprises the following specific steps:
(1) The programmable display screen is connected with the existing programmable controller of the tower crane, and the page is added with the input items: the method comprises the following steps of A, a steel wire rope winding multiplying power A, a hanger weight input value B, a steel wire rope weight value C per meter, a hanger weight calibration D, a hanger no-load sensor value calibration E, a hanger hoisting sensor value calibration F, an actual hanger weight display value G and a tower height H;
(2) The weight sensor is arranged on the weight measuring pulley, the weight is converted into a linear signal of 4-20 milliamperes and transmitted to the PLC, the PLC reads the height value I of the existing lifting hook of the tower crane, and the lifting weight calibration is firstly carried out: respectively inputting multiplying power A, hanger weight B, steel wire rope weight C per meter, actual hanging object weight value D to be calibrated and tower height H into a programmable display screen, moving the position of a lifting hook to a position just far away from the ground when no load exists, pressing a value calibration E of a hanging object no-load sensor of the programmable display screen to memorize and transmit a value E1 of a current sensor to a PLC, wherein the length of a single-rope steel wire rope is I1= H-I, and a corresponding actual weight value G1= (the steel wire rope weight value C per meter is the steel wire rope winding multiplying power A x the length of the single-rope steel wire rope I1) + a hanger weight input value B;
(3) The method comprises the steps that a tower crane hook lifts a lifted object to a certain height, at the moment, a value E2 of a current sensor is memorized and transmitted to a PLC according to a value calibration F of a lifted object lifting sensor of a programmable display screen, at the moment, the length of a single-rope steel wire rope is I2= H-I, the corresponding actual weight value G2= (the weight value C of the single-rope steel wire rope per meter is the winding multiplying power A of the single-rope steel wire rope per meter is the length I2 of the single-rope steel wire rope) + the weight input value B of a lifting appliance is the calibrated actual weight value D, the current value E3= E2-E1 and the weight value G3= G2-G1 of the weight sensor are linearly converted by the PLC, the weight value GN corresponding to the current value EN of the sensor can be obtained, the corresponding length IN of the single-rope steel wire rope is defined, and the actual weight display value G = weight value GN- (the winding multiplying power A of the single-rope per meter) of the steel wire rope per meter is the weight value G2-G1 of the lifting appliance input value B of the lifting appliance.
The invention also provides a system of the weight measuring method of the tower crane, which comprises a tower body and a programmable display screen, and is characterized in that: the tower crane further comprises a weight measuring pulley, a weight sensor, a steel wire rope and a hanging object, wherein the weight sensor is arranged on the weight measuring pulley, the weight measuring pulley is connected with the hanging object through the steel wire rope, and the tower body is provided with the weight measuring pulley.
Compared with the prior art, the invention has the following advantages and effects: the method and the system for accurately measuring and displaying the weight of the hoisted object are a technical problem which is urgently needed to be increased from the view point of the weight limit characteristic of the tower crane or the function of displaying the weight of the hoisted object in real time, and meet the use requirement.
Drawings
Fig. 1 is a schematic diagram of a simple structure of a tower crane according to an embodiment of the invention.
In the figure: the weight measuring device comprises a weight measuring pulley 1, a weight sensor 2, a steel wire rope 3, a hanging object 4 and a tower body 5.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples
Referring to fig. 1, the system of the embodiment includes a programmable display screen, a weight measuring pulley 1, a weight sensor 2, a steel wire rope 3, a hanging object 4 and a tower body 5, wherein the weight sensor 2 is installed on the weight measuring pulley 1, the weight measuring pulley 1 is connected with the hanging object 4 through the steel wire rope 3, and the tower body 5 is provided with the weight measuring pulley 1.
The weight measuring method of the tower crane comprises the following steps:
(1) The system needs to add a programmable display screen, a weight measuring pulley 1 and a weight sensor 2 on the existing tower crane system, wherein the weight measuring pulley 1 is arranged at the position of a trolley with a controlled amplitude;
(2) The display screen is connected with the existing Programmable Logic Controller (PLC) of the tower crane, and the page is added with input items: the method comprises the following steps of A, winding multiplying power A (2 times and 4 times) of a tower crane steel wire rope 3, a hanger weight input value B, a 3 weight value C of each meter of the steel wire rope, a hanger weight calibration D, a hanger no-load sensor value calibration E, a hanger lifting sensor value calibration F, an actual hanger weight display value G and a tower height H;
(3) The weight sensor 2 is arranged on the weight measuring pulley 1 to convert the weight into a linear signal of 4-20 milliamperes and transmit the linear signal to the PLC, and the PLC reads the height value I of the existing hook of the tower crane, and firstly carries out hoisting weight calibration: respectively inputting multiplying power A, hanger weight B, 3 weight C of each meter of steel wire rope, an actual value D of the weight of a hanger to be calibrated and tower height H into a display screen, moving a lifting hook position to just leave the ground when no load exists, pressing a no-load sensor value calibration E of the hanger of the display screen to memorize and transmit a value E1 of a current sensor to a PLC, wherein the length of a single-rope steel wire rope 3 is I1= H-I, and a corresponding actual weight value G1= (the weight value C of each meter of steel wire rope 3 is the winding multiplying power A of the steel wire rope 3. The length I1 of the single-rope steel wire rope 3) + a hanger weight input value B;
(4) The method comprises the steps that a tower crane hook lifts a lifted object to a certain height, the value E2 of a current sensor is memorized and transmitted to a PLC according to the value calibration F of the lifted object lifting sensor of a display screen, the length of a single-rope steel wire rope 3 is I2= H-I, the corresponding actual weight value G2= (the weight value C of the single-rope steel wire rope 3 per meter is 3 multiplied by the length I2 of the single-rope steel wire rope 3) + the input value B of the hanger weight is + the calibrated actual weight value D of the lifted object, the current value E3= E2-E1 and the weight value G3= G2-G1 of the weight sensor 2 are obtained, the PLC conducts linear conversion on the E3 and the G3 to obtain the weight value GN corresponding to the current value EN of the sensor, the corresponding length IN of the single-rope steel wire rope 3 is defined, and the actual weight display value G = weight value G of the display screen is GN (the weight value C of the steel wire rope 3 per meter is 3, the winding multiplied by the length A of the single-rope 3) multiplied by the length IN of the single-weight input value B of the hanger.
The system of the embodiment relates to a method for calculating the weight of a tower crane hoist; the intelligent measuring and calculating system integrates a display screen, a PLC and a weight sensor 2.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above described contents are merely illustrative of the structures of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (2)
1. A weight measuring method of a tower crane is characterized in that: the method comprises the following specific steps:
(1) The programmable display screen is connected with the existing programmable controller of the tower crane, and the page is added with the input items: the method comprises the following steps of A, a steel wire rope winding multiplying power A, a hanger weight input value B, a steel wire rope weight value C per meter, a hanger weight calibration D, a hanger no-load sensor value calibration E, a hanger hoisting sensor value calibration F, an actual hanger weight display value G and a tower height H;
(2) The weight sensor is arranged on the weight measuring pulley, the weight is converted into a linear signal of 4-20 milliamperes and transmitted to the PLC, the PLC reads the height value I of the existing hook of the tower crane, and firstly, the hoisting weight calibration is carried out: respectively inputting multiplying power A, hanger weight B, wire rope weight C per meter, actual value D of hanger weight to be calibrated and tower height H into a programmable display screen, moving a lifting hook position to just leave the ground when no load exists, pressing a no-load sensor value calibration E of the hanger of the programmable display screen to memorize and transmit a value E1 of a current sensor to a PLC, wherein the length of a single-rope wire rope is I1= H-I, and the corresponding actual weight value G1= (the wire rope weight C per meter is the wire rope winding multiplying power A x the length I1 of the single-rope wire rope) + a hanger weight input value B;
(3) The method comprises the steps that a tower crane hook lifts a lifted object to a certain height, at the moment, a value E2 of a current sensor is memorized and transmitted to a PLC according to a value calibration F of a lifted object lifting sensor of a programmable display screen, at the moment, the length of a single-rope steel wire rope is I2= H-I, the corresponding actual weight value G2= (the weight value C of the single-rope steel wire rope per meter is the winding multiplying power A of the single-rope steel wire rope per meter is the length I2 of the single-rope steel wire rope) + the weight input value B of a lifting appliance is the calibrated actual weight value D, the current value E3= E2-E1 and the weight value G3= G2-G1 of the weight sensor are linearly converted by the PLC, the weight value GN corresponding to the current value EN of the sensor can be obtained, the corresponding length IN of the single-rope steel wire rope is defined, and the actual weight display value G = weight value GN- (the winding multiplying power A of the single-rope per meter) of the steel wire rope per meter is the weight value G2-G1 of the lifting appliance input value B of the lifting appliance.
2. The system of the weight measuring method of the tower crane according to claim 1, which comprises a tower body and a programmable display screen, and is characterized in that: the tower crane further comprises a weight measuring pulley, a weight sensor, a steel wire rope and a hanging object, wherein the weight sensor is arranged on the weight measuring pulley, the weight measuring pulley is connected with the hanging object through the steel wire rope, and the tower body is provided with the weight measuring pulley.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110515893.3A CN113321138B (en) | 2021-05-12 | 2021-05-12 | Method and system for measuring weight of tower crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110515893.3A CN113321138B (en) | 2021-05-12 | 2021-05-12 | Method and system for measuring weight of tower crane |
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| CN113321138A CN113321138A (en) | 2021-08-31 |
| CN113321138B true CN113321138B (en) | 2023-03-21 |
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| CN202110515893.3A Active CN113321138B (en) | 2021-05-12 | 2021-05-12 | Method and system for measuring weight of tower crane |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU648367B2 (en) * | 1991-01-10 | 1994-04-21 | Dresser Industries Inc. | A method for measuring the weight of a suspended load |
| CN205634665U (en) * | 2016-05-05 | 2016-10-12 | 长沙海川自动化设备有限公司 | Hang tower machine load lifting limiter who weighs detection device and have device |
| CN108910726A (en) * | 2018-06-27 | 2018-11-30 | 浙江省建设机械集团有限公司 | A kind of system and bearing calibration of derrick crane load-carrying correction |
| CN208532038U (en) * | 2018-06-27 | 2019-02-22 | 浙江省建设机械集团有限公司 | A kind of system of derrick crane load-carrying correction |
| CN110969244B (en) * | 2019-12-18 | 2023-04-25 | 长安大学 | Building construction safety monitoring method based on convolutional neural network |
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