CN101746681A - Single-cylinder plug type telescopic jib crane, jib length measurement method and measurement device thereof - Google Patents

Single-cylinder plug type telescopic jib crane, jib length measurement method and measurement device thereof Download PDF

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Publication number
CN101746681A
CN101746681A CN200810185119A CN200810185119A CN101746681A CN 101746681 A CN101746681 A CN 101746681A CN 200810185119 A CN200810185119 A CN 200810185119A CN 200810185119 A CN200810185119 A CN 200810185119A CN 101746681 A CN101746681 A CN 101746681A
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CN
China
Prior art keywords
jib
telescopic
measurement
length
elongation
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CN200810185119A
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Chinese (zh)
Inventor
曹立峰
金慧玲
柴君飞
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徐州重型机械有限公司
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Priority to CN200810185119A priority Critical patent/CN101746681A/en
Publication of CN101746681A publication Critical patent/CN101746681A/en

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Abstract

The invention discloses a jib length measurement method used for measuring the total length of a crane jib of a single-cylinder plug type telescopic jib crane. The method comprises the following steps of: (1) sequentially driving all sections of jibs to extend out through a telescopic oil cylinder and measuring the extension quantities of all sections of jibs in the extension process; and (2) accumulating the extension quantities of all sections of the telescopic jibs in the extension process and the initial length of the crane jib so as to obtain the total length of crane jib at present. The invention also discloses a jib length measurement device and a single-cylinder plug type telescopic jib crane comprising the same. In the invention, the total length of the jibs is indirectly measured, i.e. the extension quantities of all sections of the telescopic jibs are measured firstly, and then the extension quantities of the telescopic jibs and the initial length of the crane jib are accumulated. Because the once measurement operation in the prior art is decomposed into multiple measurement operations, the length measured in a single time is shorter, and the deflection and the sag quantity of the crane jib almost have no influence on a length measurement cable, thus the measurement accuracy is obviously improved.

Description

Single-cylinder plug type telescopic jib crane and jib length measurement method thereof, measurement mechanism
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of method that is used to measure single-cylinder plug type telescopic jib crane jib length overall.The invention still further relates to a kind of device that is used to measure single-cylinder plug type telescopic jib crane jib length overall, and a kind of single-cylinder plug type telescopic jib crane that comprises this device.
Background technology
In recent years, the jib of hoisting crane extensively adopts single-cylinder bolt type telescopic boom, this telescopic boom has a telescopic oil cylinder, and the both sides of this telescopic oil cylinder are provided with some (for example two) cylinder pin accordingly, the center shaft of described cylinder pin usually with the center shaft coplane of described telescopic oil cylinder; Described telescopic oil cylinder can selectively lock or discharge the relative position of itself and arbitrary joint telescopic boom by above-mentioned cylinder pin.In addition, be equipped with the arm pin between each adjacent telescopic boom and between the basic arm arm of crane pivot joint (directly with) and the first segment telescopic boom, between the adjacent telescopic boom and the relative position between basic arm and the first segment telescopic boom can selectively lock or discharge by this arm pin.
Described telescopic oil cylinder can at first lock with the minor details telescopic boom, simultaneously minor details telescopic boom and joint telescopic boom second from the bottom is discharged, and this moment, described telescopic oil cylinder can be taken the minor details telescopic boom out of; The minor details telescopic boom locks itself and joint telescopic boom second from the bottom after arriving the desired location again, regain described telescopic oil cylinder and with itself and the second joint telescopic boom locking, then with joint telescopic boom second from the bottom and joint telescopic boom third from the bottom release, this moment, described telescopic oil cylinder promptly can be taken the second joint telescopic boom out of.The rest may be inferred just can make and respectively save telescopic boom and stretch out successively.Certainly, at any time, any joint telescopic boom or by the locking of arm pin and other telescopic booms, or lock by cylinder pin and telescopic oil cylinder.
Above-mentioned single-cylinder bolt type telescopic boom adopts latch to replace steel rope pulling crane arm to increase the lifting altitude and the lifting weight of hoisting crane, and then significantly improved the complete machine performance of hoisting crane, therefore particularly obtained using widely on the hoister in large tonnage at hoisting crane.
Should in time grasp the length overall of jib in the working process, to improve homework precision, efficient and to guarantee job safety.Traditional metering system is directly measured the length overall of jib by the length measurement sensor that is installed in the jib outside.For example, can partly be installed in the reel of linear transducer on the basic arm, and will survey long cable and be fixed on the minor details telescopic boom by support, in the motion process of jib, surveying long cable can stretch out with the minor details telescopic boom or withdraw synchronously, can go out the current length overall of jib like this by the length detection of surveying long cable.In order to satisfy the needs of measurement range, the length of the long cable of survey of length measurement sensor should be greater than the maximum length overall of jib, to satisfy the needs of measurement range.
Along with the continuous development that hoisting crane maximizes, the joint number and the length of its telescopic boom constantly increase, and this will cause the volume of the reel of length measurement sensor, all significantly increases of length overall of surveying long cable; Simultaneously, in order to transmit numerous control signals to the telescopic boom head, the number of various control cables is more, and this just makes to layout and has brought difficulty, and the disorder cable phenomenon also takes place easily.What is more important, continuous development along with the hoisting crane maximization, the jib gross weight continues to increase, jib can produce than deep camber and sag of chain in motion process, survey long cable this moment and be difficult to the linear state that keeps desirable, the length overall of adding measurement is longer, and this can cause bigger measured error occurring, is difficult to obtain observed reading comparatively accurately.
Therefore, how improving the survey precision of single-cylinder plug type telescopic jib crane jib length overall, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of jib length measurement method that is used for single-cylinder plug type telescopic jib crane, this method has higher survey precision.Another object of the present invention provides a kind of brachium measurement mechanism that is used for single-cylinder plug type telescopic jib crane, and this device has higher survey precision equally; And a kind of single-cylinder plug type telescopic jib crane that comprises above-mentioned brachium measurement mechanism.
For solving the problems of the technologies described above, the invention provides a kind of jib length measurement method, be used for the measurement of single-cylinder plug type telescopic jib crane jib length overall, comprise the steps:
1) drives successively by telescopic oil cylinder and respectively save telescopic boom and stretch out, and measure the elongation that respectively saves telescopic boom in the elongation process;
2) add up and respectively save telescopic boom and stretch out the elongation in the process and the initial length of described jib, can obtain the current length overall of jib thus.
Preferably, the elongation that respectively saves telescopic boom in the elongation process obtains by the following method: measure the elongation that respectively saves telescopic oil cylinder in the telescopic boom elongation process, this elongation is the elongation of corresponding telescopic boom.
Preferably, each elongation that saves telescopic oil cylinder in the telescopic boom elongation process obtains by length measurement sensor, the long cable of survey that described length measurement sensor comprises reel and is wound in the described reel outside, the end of the long cable of described survey and described reel are connected the afterbody of the basic arm of described telescopic oil cylinder and described jib respectively.
Preferably, the cylinder bar of described reel and described telescopic oil cylinder all is installed on the afterbody of described basic arm, and the long cable of described survey is connected with the cylinder barrel of described telescopic oil cylinder.
Preferably, the initial length that is in the jib of contraction state passes through to measure in advance to obtain.
The telescopic boom that respectively saves of single-cylinder plug type telescopic jib crane stretches out successively, method of measurement provided by the present invention has been utilized this characteristics, at first measure the elongation that respectively saves telescopic boom in the elongation process, then the elongation of each telescopic boom and the initial length of jib are added up mutually, can obtain the current length overall of jib thus.That is to say that method of measurement provided by the present invention is to measure the jib length overall indirectly: measure the elongation that respectively saves telescopic boom earlier, then each is saved the initial length stack of the elongation and the jib of telescopic boom, thereby obtain the length overall of jib.Because the present invention is decomposed into one-shot measurement operation of the prior art and repeatedly measures operation, therefore the length of single measurement is shorter, there are influence in the amount of deflection of jib and sag of chain hardly to surveying long cable, survey long cable in the survey growth process and can keep comparatively desirable linear state, survey precision is significantly improved.
Because each telescopic boom all is to stretch out synchronously under the drive of telescopic oil cylinder, therefore a kind of preferred embodiment in, can measure the stroke of each telescopic boom by the elongation of measuring telescopic oil cylinder, this method is comparatively simple; Survey long cable and extend with the elongation oil cylinder, can have better rectilinearity, survey precision is more secure.
The present invention also provides a kind of brachium measurement mechanism, is used for the measurement of single-cylinder plug type telescopic jib crane jib length overall, comprising: length measurement sensor is used for measuring telescopic oil cylinder and is driving the elongation that respectively saves the process that telescopic boom stretches out; Treater, each elongation and predetermined jib initial length that described length measurement sensor is recorded superpose, thereby obtain the current length overall of described jib.
Preferably, the long cable of survey that described length measurement sensor comprises reel and is wound in the described reel outside, the end of the long cable of described survey and described reel are connected the afterbody of the basic arm of described telescopic oil cylinder and described jib respectively.
Preferably, the cylinder bar of described reel and described telescopic oil cylinder all is installed on the afterbody of described basic arm, and the long cable of described survey is connected with the cylinder barrel of described telescopic oil cylinder.
The present invention also provides a kind of single-cylinder plug type telescopic jib crane, comprises above-mentioned each described brachium measurement mechanism.
Preferably, described single-cylinder plug type telescopic jib crane is specially wheel crane.
The brachium measurement mechanism that is used for single-cylinder plug type telescopic jib crane provided by the present invention, comprise length measurement sensor and treater, described length measurement sensor is used for measuring telescopic oil cylinder and is driving the elongation that respectively saves the process that telescopic boom stretches out, each elongation and the stack of predetermined initial length that described treater records described length measurement sensor, thus the current length overall of jib obtained.Measurement mechanism provided by the present invention is to measure the jib length overall indirectly equally, can measure the elongation that respectively saves telescopic boom earlier, then each is saved the initial length stack of the elongation and the jib of telescopic boom, thereby obtains the length overall of jib.Because the present invention has replaced one-shot measurement operation of the prior art by repeatedly measuring operation, therefore the length of single measurement is shorter, there are influence in the amount of deflection of jib and sag of chain hardly to surveying long cable, survey long cable in the survey growth process and can keep comparatively desirable linear state, survey precision is significantly improved.
Single-cylinder plug type telescopic jib crane provided by the present invention obviously also has above-mentioned advantage, and this paper repeats no more.
Description of drawings
Fig. 1 is the set-up mode scheme drawing of brachium measurement mechanism in a kind of specific embodiment of the present invention;
Fig. 2 is provided brachium measurement mechanism structural representation by a kind of specific embodiment of the present invention;
Fig. 3 is the diagram of circuit of the present invention's jib length measurement method that a kind of specific embodiment provides;
Fig. 4 is the diagram of circuit of the another kind of jib length measurement method that the specific embodiment provides of the present invention.
The specific embodiment
Core of the present invention provides a kind of jib length measurement method that is used for single-cylinder plug type telescopic jib crane, and this method has higher survey precision.Another core of the present invention provides a kind of brachium measurement mechanism that is used for single-cylinder plug type telescopic jib crane, and this device has higher survey precision equally; And a kind of single-cylinder plug type telescopic jib crane that comprises above-mentioned brachium measurement mechanism.
In order to make those skilled in the art person understand the present invention program better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please also refer to Fig. 1 and Fig. 2, Fig. 1 is the set-up mode scheme drawing of brachium measurement mechanism in a kind of specific embodiment of the present invention; Fig. 2 is provided brachium measurement mechanism structural representation by a kind of specific embodiment of the present invention.
In a kind of specific embodiment, the jib of single-cylinder plug type telescopic jib crane comprises basic arm 1 (promptly direct and crane part pivotally attached first segment arm), and be set in multi-stage telescopic arms in the basic arm 1 successively, only first segment telescopic boom 2 and minor details telescopic boom 3 have been added Reference numeral among Fig. 1.Jib of the present invention means the integral body that above-mentioned basic arm 1 and each joint telescopic boom constitute.
In the inner chamber of described jib telescopic oil cylinder is set, described telescopic oil cylinder comprises cylinder barrel 4 and cylinder bar 5.One end of described telescopic oil cylinder can be installed on the afterbody of basic arm 1, and its other end can select to connect any one of described telescopic boom.
Described telescopic oil cylinder can at first lock with minor details telescopic boom 3, simultaneously minor details telescopic boom 3 and joint telescopic boom second from the bottom is discharged, and this moment, described telescopic oil cylinder can be taken minor details telescopic boom 3 out of; After minor details telescopic boom 3 arrives the desired location itself and joint telescopic boom second from the bottom are locked again, regain described telescopic oil cylinder and with the locking of itself and joint telescopic boom second from the bottom, then with joint telescopic boom second from the bottom and joint telescopic boom third from the bottom release, this moment, described telescopic oil cylinder promptly can be taken joint telescopic boom second from the bottom out of.The rest may be inferred just can make the telescopic boom that respectively saves that comprises first segment telescopic boom 2 stretch out successively.Certainly, at any time, any joint telescopic boom or by the locking of arm pin and other telescopic booms, or lock by cylinder pin and telescopic oil cylinder.
Can utilize and respectively save telescopic boom and stretch out these characteristics one by one, the metering system with existing Integratively is measured is improved to the metering system that repeatedly measurement adds up then.
Particularly, brachium measurement mechanism provided by the present invention comprises length measurement sensor 8, the long cable 7 of survey that length measurement sensor 8 (being shown among Fig. 2) specifically can comprise reel 6 and be wound in the described reel outside, length measurement sensor 8 are used for measuring described telescopic oil cylinder respectively saves the process that telescopic boom stretches out in drive elongation.
The end of surveying long cable 7 and reel 6 can be connected the afterbody of described telescopic oil cylinder and basic arm 1 respectively.
For example, described telescopic oil cylinder can be installed on the afterbody of basic arm 1 with its cylinder bar 5, at this moment, reel 6 can be installed on the afterbody of basic arm 1 by rotating shaft, simultaneously, is connected with the cylinder barrel 4 of described telescopic oil cylinder surveying long cable 7.
Like this, the cylinder barrel of described telescopic oil cylinder 4 drives and respectively saves in the process that telescopic boom stretches out successively, and surveying long cable 7 also will be with cylinder barrel 4 synchronous extension, and surveying long cable 7 in the process of cylinder barrel 4 withdrawals also will synchronous thereupon rolling, thereby reaches the purpose of survey length.
Described brachium measurement mechanism also comprises treater 9, each elongation that treater 9 can record length measurement sensor 8 and the stack of predetermined jib initial length, thus obtain the current length overall of jib.
Brachium measurement mechanism provided by the present invention can also comprise telltale 10, and the current length overall of jib that is used for treater 9 is obtained shows.
Because measurement mechanism provided by the present invention is to measure the jib length overall indirectly, can measure the elongation that respectively saves telescopic boom earlier, then each is saved the initial length stack of the elongation and the jib of telescopic boom, thereby obtain the length overall of jib.Because the present invention has replaced one-shot measurement operation of the prior art by repeatedly measuring operation, therefore the length of single measurement is shorter, there are influence in the amount of deflection of jib and sag of chain hardly to surveying long cable, survey long cable 7 in the survey growth process and can keep comparatively desirable linear state, survey precision is significantly improved.
The present invention also provides a kind of single-cylinder plug type telescopic jib crane, wraps and states each described brachium measurement mechanism, and the structure of described other each several parts of single-cylinder plug type telescopic jib crane can be with reference to prior art, and the present invention repeats no more.Described single-cylinder plug type telescopic jib crane specifically can be a wheel crane.
Please refer to Fig. 3, Fig. 3 is the diagram of circuit of the present invention's jib length measurement method that a kind of specific embodiment provides.
In a kind of specific embodiment, the jib length measurement method that is used for single-cylinder plug type telescopic jib crane provided by the present invention comprises the steps:
Step S11: drive successively by telescopic oil cylinder and respectively to save telescopic boom and stretch out, and measure the elongation that respectively saves telescopic boom in the elongation process.
Step S12: add up and respectively save telescopic boom and stretch out the elongation in the process and the initial length of described jib, can obtain the current length overall of jib thus.
Under contraction state, each saves telescopic boom and all is positioned among the basic arm 1, and this moment, the elongation of jib was zero, and the initial length of jib is a fixed value, and this value can also can obtain in advance by measuring.
Please refer to Fig. 4, Fig. 4 is the diagram of circuit of the another kind of jib length measurement method that the specific embodiment provides of the present invention.
In the another kind of specific embodiment, the jib length measurement method that is used for single-cylinder plug type telescopic jib crane provided by the present invention comprises the steps:
Step S21: drive successively by telescopic oil cylinder and respectively to save telescopic boom and stretch out, and measure the elongation of telescopic oil cylinder in the elongation process, this elongation is the elongation that respectively saves telescopic boom.
Step S22: add up and respectively save telescopic boom and stretch out the elongation in the process and the initial length of described jib, can obtain the current length overall of jib thus.
As previously mentioned, each elongation that saves telescopic oil cylinder in the telescopic boom elongation process can obtain by length measurement sensor 8, the long cable 7 of survey that length measurement sensor comprises reel 6 and is wound in reel 6 outsides, the end of surveying long cable 7 and reel 6 are connected the afterbody of the basic arm 1 of described telescopic oil cylinder and described jib respectively.
Described telescopic oil cylinder can be installed on the afterbody of basic arm 1 with its cylinder bar 5, at this moment, reel 6 can be installed on the afterbody of basic arm 1 by rotating shaft, simultaneously, is connected with the cylinder barrel 4 of described telescopic oil cylinder surveying long cable 7.
Like this, the cylinder barrel of described telescopic oil cylinder 4 drives and respectively saves in the process that telescopic boom stretches out successively, and surveying long cable 7 also will be with cylinder barrel 4 synchronous extension, and surveying long cable 7 in the process of cylinder barrel 4 withdrawals also will synchronous thereupon rolling, thereby reaches the purpose of survey length.
More than to single-cylinder plug type telescopic jib crane provided by the present invention and jib thereof survey rectangular method, measuring motion is described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (10)

1. a jib length measurement method is used for the measurement of single-cylinder plug type telescopic jib crane jib length overall, comprises the steps:
1) drives successively by telescopic oil cylinder and respectively save telescopic boom and stretch out, and measure the elongation that respectively saves telescopic boom in the elongation process;
2) add up and respectively save telescopic boom and stretch out the elongation in the process and the initial length of described jib, can obtain the current length overall of jib thus.
2. jib length measurement method as claimed in claim 1 is characterized in that, the elongation that respectively saves telescopic boom in the elongation process obtains by the following method:
Measure the elongation that respectively saves telescopic oil cylinder in the telescopic boom elongation process, this elongation is the elongation of corresponding telescopic boom.
3. jib length measurement method as claimed in claim 2, it is characterized in that, each elongation that saves telescopic oil cylinder in the telescopic boom elongation process obtains by length measurement sensor, the long cable of survey that described length measurement sensor comprises reel and is wound in the described reel outside, the end of the long cable of described survey is connected described telescopic oil cylinder respectively with described reel, and the afterbody of the basic arm of described jib.
4. jib length measurement method as claimed in claim 3 is characterized in that the cylinder bar of described reel and described telescopic oil cylinder all is installed on the afterbody of described basic arm, and the long cable of described survey is connected with the cylinder barrel of described telescopic oil cylinder.
5. as each described jib length measurement method of claim 1 to 4, it is characterized in that the initial length that is in the jib of contraction state obtains by measuring in advance.
6. a brachium measurement mechanism is used for the measurement of single-cylinder plug type telescopic jib crane jib length overall, it is characterized in that, comprising:
Length measurement sensor is used for measuring telescopic oil cylinder and is driving the elongation that respectively saves the process that telescopic boom stretches out;
Treater, each elongation that described length measurement sensor is recorded and the stack of the initial length of predetermined jib, thus obtain the current length overall of jib.
7. brachium measurement mechanism as claimed in claim 6, it is characterized in that, the long cable of survey that described length measurement sensor comprises reel and is wound in the described reel outside, the end of the long cable of described survey is connected described telescopic oil cylinder respectively with described reel, and the afterbody of the basic arm of described jib.
8. brachium measurement mechanism as claimed in claim 7 is characterized in that the cylinder bar of described reel and described telescopic oil cylinder all is installed on the afterbody of described basic arm, and the long cable of described survey is connected with the cylinder barrel of described telescopic oil cylinder.
9. a single-cylinder plug type telescopic jib crane is characterized in that, comprises as each described brachium measurement mechanism of claim 6 to 8.
10. single-cylinder plug type telescopic jib crane as claimed in claim 9 is characterized in that, is specially wheel crane.
CN200810185119A 2008-12-09 2008-12-09 Single-cylinder plug type telescopic jib crane, jib length measurement method and measurement device thereof CN101746681A (en)

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Application Number Priority Date Filing Date Title
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102070089A (en) * 2010-12-29 2011-05-25 三一汽车起重机械有限公司 Crane with single-cylinder bolt type working arm as well as method and device for measuring arm length thereof
CN102849631A (en) * 2011-06-29 2013-01-02 三一汽车起重机械有限公司 Single-cylinder pin type telescopic jib emergency retraction method and device
CN102942114A (en) * 2012-12-07 2013-02-27 廊坊凯博建设机械科技有限公司 Method for measuring arm length of telescopic arm crane
WO2013063993A1 (en) * 2011-10-31 2013-05-10 中联重科股份有限公司 Method, controller, and device for measuring work parameters of crane boom, and crane
CN103204435A (en) * 2013-03-19 2013-07-17 北京京城重工机械有限责任公司 Method for positioning telescopic cylinder of single-cylinder pin type telescopic arm
CN104340884A (en) * 2014-08-20 2015-02-11 中联重科股份有限公司 Method, device and system for controlling single cylinder bolt type telescopic arm, and engineering machine
CN106256754A (en) * 2015-06-16 2016-12-28 徐工集团工程机械股份有限公司 The scaling method of the long line of telescopic arm cylinder and system and crane
CN106744386A (en) * 2016-12-22 2017-05-31 吉林大学 Single cylinder bolt-type multistage sequential telescopic method for optimizing route
CN106744389A (en) * 2016-12-22 2017-05-31 吉林大学 A kind of efficient single cylinder bolt-type multistage sequential telescopic method for optimizing route
CN108016995A (en) * 2016-10-31 2018-05-11 摩巴(大连)自动控制系统有限公司 Hoisting arm structure and its traverse measuring device and amount of movement measuring method
CN105865401B (en) * 2016-05-13 2018-11-20 北汽福田汽车股份有限公司 Deformation quantity measuring method and device for scalable cantilever crane
CN110240021A (en) * 2019-06-28 2019-09-17 三一汽车起重机械有限公司 The monitoring method of cable, processor and system in single-cylinder bolt type telescopic boom
CN110775726A (en) * 2019-10-30 2020-02-11 三一汽车起重机械有限公司 Cable drum protection device and cable drum protection method

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102070089A (en) * 2010-12-29 2011-05-25 三一汽车起重机械有限公司 Crane with single-cylinder bolt type working arm as well as method and device for measuring arm length thereof
WO2012088857A1 (en) * 2010-12-29 2012-07-05 湖南三一智能控制设备有限公司 Crane with single cylinder pin working arm and method and device for measuring its arm length
CN102849631A (en) * 2011-06-29 2013-01-02 三一汽车起重机械有限公司 Single-cylinder pin type telescopic jib emergency retraction method and device
CN102849631B (en) * 2011-06-29 2015-12-16 三一汽车起重机械有限公司 A kind of single-cylinder bolt type telescopic boom is emergent receives arm method and device
WO2013063993A1 (en) * 2011-10-31 2013-05-10 中联重科股份有限公司 Method, controller, and device for measuring work parameters of crane boom, and crane
CN102942114A (en) * 2012-12-07 2013-02-27 廊坊凯博建设机械科技有限公司 Method for measuring arm length of telescopic arm crane
CN102942114B (en) * 2012-12-07 2015-05-06 廊坊凯博建设机械科技有限公司 Method for measuring arm length of telescopic arm crane
CN103204435A (en) * 2013-03-19 2013-07-17 北京京城重工机械有限责任公司 Method for positioning telescopic cylinder of single-cylinder pin type telescopic arm
CN103204435B (en) * 2013-03-19 2016-03-02 北京京城重工机械有限责任公司 A kind of telescopic cylinder of single-cylinder pin type telescopic localization method
CN104340884A (en) * 2014-08-20 2015-02-11 中联重科股份有限公司 Method, device and system for controlling single cylinder bolt type telescopic arm, and engineering machine
CN106256754A (en) * 2015-06-16 2016-12-28 徐工集团工程机械股份有限公司 The scaling method of the long line of telescopic arm cylinder and system and crane
CN106256754B (en) * 2015-06-16 2018-03-13 徐工集团工程机械股份有限公司 The scaling method and system and crane of the long line of telescopic arm cylinder
CN105865401B (en) * 2016-05-13 2018-11-20 北汽福田汽车股份有限公司 Deformation quantity measuring method and device for scalable cantilever crane
CN108016995A (en) * 2016-10-31 2018-05-11 摩巴(大连)自动控制系统有限公司 Hoisting arm structure and its traverse measuring device and amount of movement measuring method
CN106744386A (en) * 2016-12-22 2017-05-31 吉林大学 Single cylinder bolt-type multistage sequential telescopic method for optimizing route
CN106744389A (en) * 2016-12-22 2017-05-31 吉林大学 A kind of efficient single cylinder bolt-type multistage sequential telescopic method for optimizing route
CN106744386B (en) * 2016-12-22 2018-04-10 吉林大学 Single cylinder bolt-type multistage sequential telescopic method for optimizing route
CN110240021A (en) * 2019-06-28 2019-09-17 三一汽车起重机械有限公司 The monitoring method of cable, processor and system in single-cylinder bolt type telescopic boom
CN110775726A (en) * 2019-10-30 2020-02-11 三一汽车起重机械有限公司 Cable drum protection device and cable drum protection method

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