CN101691189A - Method for detecting overload crane by detecting power - Google Patents
Method for detecting overload crane by detecting power Download PDFInfo
- Publication number
- CN101691189A CN101691189A CN200910070779A CN200910070779A CN101691189A CN 101691189 A CN101691189 A CN 101691189A CN 200910070779 A CN200910070779 A CN 200910070779A CN 200910070779 A CN200910070779 A CN 200910070779A CN 101691189 A CN101691189 A CN 101691189A
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- China
- Prior art keywords
- crane
- load
- detecting
- overload
- hoisting crane
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
- B66C15/06—Arrangements or use of warning devices
- B66C15/065—Arrangements or use of warning devices electrical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
- Control Of Electric Motors In General (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to a method for detecting the overload of a crane by detecting the power, comprising the following steps: (1) detecting the working voltage and the working current of an electric motor; (2) calculating the load of the crane according to the following mathematic model: m=KEtaUICOSPhi/gv, wherein the m is the load of the crane, the K is the coefficient, the U is the working voltage of the electric motor, the I is working current of the electric motor, the COSPhi is the power factor of the electric motor, the Eta is the craning efficiency of the crane, v is the ascending speed of the load of the crane and g is the gravity acceleration of the load; and (3) comparing the calculated load of the crane with the rated load of the crane and judging the overload of the crane. The method is used for detecting the overload of the crane by detecting the working voltage and the working current of the electric motor according to the ascending speed of the load of the crane and related parameters provided by the user without using a weight sensor and a standard weight to calibrate, can not be affected by the fluctuation of the voltage and has the characteristics of rapid response speed, high degree of accuracy, wide application range and the like.
Description
Technical field
The invention belongs to crane safety protection field, especially a kind of method for detecting overload crane by detecting power.
Background technology
At present, hoisting crane is widely used in occasions such as goods yard, workshop and is used to lift goods, and its work characteristics is that startup is frequent, hoisting capacity is uncertain, occurs the situation of overload in the course of the work through regular meeting.When overload crane moves, can make the parts of hoisting crane cause damage, shorten the service life of hoisting crane, can cause safety misadventure when serious.In order to prevent overload crane operation destruction to hoisting crane, avoid danger million accidents of hoisting crane, prolong the service life of hoisting crane, need be to the hoisting crane restriction that overloads.To the hoisting crane method for limiting that overloads, load lifting limiter normally is installed on hoisting crane, utilize its test load weight, prevent that overload operation dangerous situation from appearring in hoisting crane.
The following two kinds of methods that mainly adopt existing lifting killer realize the detection to load weight: 1, adopt the method for erection weight sensor, its mechanically deform and functional relation between the load weight of utilizing load to cause is carried out the detection of load weight.The deficiency of its existence is: problems such as the reaction time length of test load weight, the lifting altitude that is not easy to install, influence load, narrow application range; 2, adopt the method for the working current that detects electrical motor, it carries out the detection of load weight by the relation between the working current of load weight and electrical motor.The problem of its existence is: owing to the factor of the working current that influences electrical motor is more, the real work electric current can not accurately reflect load weight, thereby causes the accuracy of test load weight lower, to problems such as the adaptive capacity difference of voltage fluctuation and the installation that must use the standard test weight calibration to bring are loaded down with trivial details.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, the method for detecting overload crane by detecting power of provide that a kind of method of inspection science is reliable, accuracy is high, reaction is fast, be convenient to install, Applicable scope is extensive.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of method for detecting overload crane by detecting power comprises the steps:
(1) detects the operating voltage of electrical motor and the working current of electrical motor;
(2) according to the load weight of following calculated with mathematical model hoisting crane:
m＝KηUICOSΦ/gv
In the formula: m is the load weight of hoisting crane, and K is a coefficient, and U is the operating voltage of electrical motor, I is the working current of electrical motor, and COS Φ is the power of electric motor factor, and η is the lifting efficient of hoisting crane, v is the load lifting velocity, and g is the acceleration due to gravity of load weight;
(3) with the rated load of the load weight that calculates and hoisting crane relatively, judge the overload situation.
And the gravity acceleration g of lifting efficiency eta, load lifting velocity v and the load weight of described power of electric motor factor COS Φ, hoisting crane and COEFFICIENT K adopt calibration method or type test method to obtain.
Advantage of the present invention and good effect are:
1. this method of inspection is according to the detection of conservation of energy theorem realization to Crane Load weight.In testing process, working weight sensor not, be not subjected to the influence of voltage fluctuation, do not need to use the standard test weight calibration, but need the user that load lifting velocity, power of motor (UI), three parameters of rated load weight are provided simultaneously, utilize power relation to realize that load-carrying detects to hoisting crane, its method of inspection principle of design science is reliable, practical, and accuracy in detection height, reaction be fast, be convenient to install.
2. this method of inspection makes full use of the characteristic parameter of hoisting crane self, as parameters such as load lifting velocity V, lifting efficiency eta, power factor COS Φ, its implementation is scientific and reasonable, can rapidly and accurately hoisting capacity be detected and handle the overload situation occurring.
3, this method of inspection can also carry out current protection, voltage protection and phase sequence to hoisting crane outside limiting protecting that hoisting crane is overloaded, safe in operation that can the general protection hoisting crane.
4. this method of inspection can be used in all kinds with on the motor-driven elevator machinery, and its Applicable scope is extensive.
5. operating voltage and working current and the load lifting velocity that in conjunction with user provide and the electrical motor correlation parameter of the present invention by detecting electrical motor realized detection to Crane Load weight, working weight sensor not, be not subjected to the influence of voltage fluctuation, do not need to use the standard test weight calibration, have characteristics such as speed of response is fast, accuracy is high, range of use is extensive.
Description of drawings
Fig. 1 is a testing circuit block scheme used in the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the embodiment of the invention is further described.
A kind of method for detecting overload crane by detecting power can be realized on testing circuit as shown in Figure 1.This testing circuit is made of microprocessor, current sample module, voltage sample module, alarm module and load module, and load module is connected with the I/O interface of microprocessor; One end of current sample module and voltage sample module is connected with electrical motor, the other end is connected with the I/O interface of microprocessor, current sample module and voltage sample module are gathered the electric current and the voltage signal of electrical motor respectively and are converted into digital signal and send in the microprocessor, microprocessor is handled the voltage gathered and current data and the various parameters that preset by built-in process software, microprocessor is connected with alarm module and electric appliance control box by the I/O interface, will report to the police and cuts off the rising power supply by electric appliance control box for the situation of overload.
A kind of method for detecting overload crane by detecting power is realized as follows:
(1) respectively the operating voltage and the working current of electrical motor are detected by voltage sample module and current sample module, the result of detection is sent in the microprocessor;
(2) according to the load weight of following calculated with mathematical model hoisting crane:
m＝KηUICOSΦ/gv
In the formula: m is the load weight of the hoisting crane that calculates;
K is a coefficient;
U is the operating voltage of real-time detected electrical motor;
I is for detecting the working current of electrical motor in real time;
COS Φ is the power of electric motor factor;
η is the lifting efficient of hoisting crane;
V is the load lifting velocity;
G is the acceleration due to gravity of load weight.
The gravity acceleration g of lifting efficiency eta, load lifting velocity v and the load weight of above-mentioned power of electric motor factor COS Φ, hoisting crane and COEFFICIENT K all adopt calibration method or type test method to obtain.
(3) relatively with the rated load of the load weight that calculates and hoisting crane, judge the overload situation, when load weight surpasses rated load weight, carry out processing such as corresponding light warning, sound and light alarm or cut-out rising power supply according to relevant regulations such as national standard.
Embodiment of the present invention is illustrative, rather than determinate, so the present invention is not limited to the embodiment described in the specific embodiment.Other embodiments that every technical scheme according to the present invention draws belong to the scope of protection of the invention equally.
Claims (2)
1. a method for detecting overload crane by detecting power is characterized in that: comprise the steps:
(1) detects the operating voltage of electrical motor and the working current of electrical motor;
(2) according to the load weight of following calculated with mathematical model hoisting crane:
m＝KηUICOSФ/gv
In the formula: m is the load weight of hoisting crane, and K is a coefficient, and U is the operating voltage of electrical motor, I is the working current of electrical motor, and COS Ф is the power of electric motor factor, and η is the lifting efficient of hoisting crane, v is the load lifting velocity, and g is the acceleration due to gravity of load weight;
(3) with the rated load of the load weight that calculates and hoisting crane relatively, judge the overload situation.
2. method for detecting overload crane by detecting power according to claim 1 is characterized in that: the gravity acceleration g of lifting efficiency eta, load lifting velocity v and the load weight of described power of electric motor factor COS Ф, hoisting crane and COEFFICIENT K adopt calibration method or type test method to obtain.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070779A CN101691189A (en) | 2009-10-13 | 2009-10-13 | Method for detecting overload crane by detecting power |
| AU2010101478A AU2010101478A4 (en) | 2009-10-13 | 2010-04-27 | Method for testing overload of power method crane |
| PCT/CN2010/072227 WO2011044768A1 (en) | 2009-10-13 | 2010-04-27 | Method for detecting overload of crane by power manner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910070779A CN101691189A (en) | 2009-10-13 | 2009-10-13 | Method for detecting overload crane by detecting power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101691189A true CN101691189A (en) | 2010-04-07 |
Family
ID=42079929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910070779A Pending CN101691189A (en) | 2009-10-13 | 2009-10-13 | Method for detecting overload crane by detecting power |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN101691189A (en) |
| AU (1) | AU2010101478A4 (en) |
| WO (1) | WO2011044768A1 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011044768A1 (en) * | 2009-10-13 | 2011-04-21 | 天津天安起重电器有限公司 | Method for detecting overload of crane by power manner |
| CN102167259A (en) * | 2010-12-28 | 2011-08-31 | 天津天安起重电器有限公司 | Measuring method of loading quality of hoisting machine |
| CN104237625A (en) * | 2014-10-16 | 2014-12-24 | 广州特种机电设备检测研究院 | Full-state hoisting machine current detector |
| WO2016091201A1 (en) * | 2014-12-11 | 2016-06-16 | 冯春魁 | Parameter measurement, control, operation, and load monitoring method and system for crane |
| CN106441475A (en) * | 2016-09-12 | 2017-02-22 | 中国矿业大学 | Vibrating screen treatment quantity on-line detection device and method |
| CN109462357A (en) * | 2018-09-04 | 2019-03-12 | 中联重科股份有限公司 | Lifting load calculation method and device based on frequency converter and motor |
| CN110294416A (en) * | 2019-06-24 | 2019-10-01 | 中铁十二局集团有限公司 | Workshop mono beam overhead crane in bridge type control method and device |
| CN111606206A (en) * | 2019-02-22 | 2020-09-01 | 三菱重工机械***株式会社 | Load calculation device and load calculation method |
| CN113460885A (en) * | 2021-07-25 | 2021-10-01 | 上海莘汭驱动技术有限公司 | Driving control method and system for large-torque permanent magnet alternating current servo motor |
| CN116119534A (en) * | 2023-02-07 | 2023-05-16 | 江苏苏港智能装备产业创新中心有限公司 | Method for detecting lifting load of crane based on lifting frequency converter technology |
Family Cites Families (8)
| 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 |
| JP2593270B2 (en) * | 1992-04-27 | 1997-03-26 | 株式会社キトー | Power measurement type load detector |
| DE19802674C2 (en) * | 1998-01-24 | 2001-05-10 | Michael Ertl | Method for weight measurement of loads in lifting devices |
| CN1270169C (en) * | 2004-04-08 | 2006-08-16 | 王振宇 | Method and device for determining weight of starting parcel for winch |
| CN101020560A (en) * | 2007-03-14 | 2007-08-22 | 罗伯威起重安全***（天津）有限公司 | Method of detecting and controlling crane safety system |
| CN201195665Y (en) * | 2008-02-25 | 2009-02-18 | 江苏省特种设备安全监督检验研究院 | Electrical control equipment for load speed governing crane |
| CN101348216B (en) * | 2008-09-05 | 2010-06-02 | 湖南三一起重机械有限公司 | Crane security protection system and crane thereof |
| CN101691189A (en) * | 2009-10-13 | 2010-04-07 | 天津天安起重电器有限公司 | Method for detecting overload crane by detecting power |
-
2009
- 2009-10-13 CN CN200910070779A patent/CN101691189A/en active Pending
-
2010
- 2010-04-27 WO PCT/CN2010/072227 patent/WO2011044768A1/en active Application Filing
- 2010-04-27 AU AU2010101478A patent/AU2010101478A4/en not_active Ceased
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011044768A1 (en) * | 2009-10-13 | 2011-04-21 | 天津天安起重电器有限公司 | Method for detecting overload of crane by power manner |
| CN102167259A (en) * | 2010-12-28 | 2011-08-31 | 天津天安起重电器有限公司 | Measuring method of loading quality of hoisting machine |
| CN104237625A (en) * | 2014-10-16 | 2014-12-24 | 广州特种机电设备检测研究院 | Full-state hoisting machine current detector |
| WO2016091201A1 (en) * | 2014-12-11 | 2016-06-16 | 冯春魁 | Parameter measurement, control, operation, and load monitoring method and system for crane |
| WO2016091200A1 (en) * | 2014-12-11 | 2016-06-16 | 冯春魁 | Parameter measurement, control, operation, and load monitoring method and system for crane |
| CN106441475B (en) * | 2016-09-12 | 2019-05-31 | 中国矿业大学 | A kind of vibrating screen treating capacity on-line measuring device and method |
| CN106441475A (en) * | 2016-09-12 | 2017-02-22 | 中国矿业大学 | Vibrating screen treatment quantity on-line detection device and method |
| CN109462357A (en) * | 2018-09-04 | 2019-03-12 | 中联重科股份有限公司 | Lifting load calculation method and device based on frequency converter and motor |
| CN109462357B (en) * | 2018-09-04 | 2020-08-18 | 中联重科股份有限公司 | Lifting load calculation method and device based on frequency converter and motor |
| CN111606206A (en) * | 2019-02-22 | 2020-09-01 | 三菱重工机械***株式会社 | Load calculation device and load calculation method |
| CN110294416A (en) * | 2019-06-24 | 2019-10-01 | 中铁十二局集团有限公司 | Workshop mono beam overhead crane in bridge type control method and device |
| CN113460885A (en) * | 2021-07-25 | 2021-10-01 | 上海莘汭驱动技术有限公司 | Driving control method and system for large-torque permanent magnet alternating current servo motor |
| CN113460885B (en) * | 2021-07-25 | 2022-04-12 | 上海莘汭驱动技术有限公司 | Driving control method and system for large-torque permanent magnet alternating current servo motor |
| CN116119534A (en) * | 2023-02-07 | 2023-05-16 | 江苏苏港智能装备产业创新中心有限公司 | Method for detecting lifting load of crane based on lifting frequency converter technology |
| CN116119534B (en) * | 2023-02-07 | 2023-09-12 | 江苏苏港智能装备产业创新中心有限公司 | Method for detecting lifting load of crane based on lifting frequency converter technology |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011044768A1 (en) | 2011-04-21 |
| AU2010101478A4 (en) | 2011-05-19 |
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Open date: 20100407 |