CN102249152B - Device and method for detecting movable counter weight of crane - Google Patents
Device and method for detecting movable counter weight of crane Download PDFInfo
- Publication number
- CN102249152B CN102249152B CN201110146861.7A CN201110146861A CN102249152B CN 102249152 B CN102249152 B CN 102249152B CN 201110146861 A CN201110146861 A CN 201110146861A CN 102249152 B CN102249152 B CN 102249152B
- Authority
- CN
- China
- Prior art keywords
- pressure
- weight
- moving counterweight
- operating mode
- value
- Prior art date
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
- B66C23/72—Counterweights or supports for balancing lifting couples
- B66C23/74—Counterweights or supports for balancing lifting couples separate from jib
-
- 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
- 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
- B66C23/88—Safety gear
- B66C23/90—Devices for indicating or limiting lifting moment
- B66C23/905—Devices for indicating or limiting lifting moment electrical
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a device and a method for detecting a movable counter weight of a crane. The device for detecting the movable counter weight of the crane comprises a pressure sensing device for sensing pressure information in a counter weight oil cylinder, and a controller including a computing unit for computing a tensile force difference suffered by the counter weight oil cylinder when the movable counter weight is installed and when the movable counter weight is not installed, then determining a ratio of the tensile force difference and an acceleration to be the weight of the movable counter weight corresponding to the counter weight oil cylinder. The device can automatically determine the weight of the movable counter weight corresponding to the counter weight oil cylinder and is favorable for automatically selecting hoisting working conditions.
Description
Technical field
The present invention relates to engineering machinery field, be specifically related to a kind of detecting device and method of movable counter weight of crane.
Background technology
When hoisting crane travels on road, be subject to the constraint of traffic law, the deadweight of vehicle must be less than the weight of rules and regulations, simultaneously, in hoisting crane work, require again stability and the lifting performance of further lift crane, for solving this contradiction, occurred this device of moving counterweight.Moving counterweight is fit on just in hoisting crane work only, is not assemblied on vehicle when travelling, and deadweight when so not only meeting vehicle and travel on road, again can be in its work, raising stability and lifting performance.But, also because the appearance of moving counterweight has brought some problems.Because the corresponding hoisting crane lifting performance of different counterweights is different, for security consideration, at hoisting crane, hang when carrying and need to select hang corresponding with counterweight to carry an operating mode, therefore need to hang the weight that obtains moving counterweight before carrying at hoisting crane, just can be fixed total balance weight of the combined counterweight of counterweight and moving counterweight.
At present, when hoisting crane carries out work, need hanging of the corresponding counterweight of operator artificial selection to carry an operating mode, still, this artificial selection is certain to be subject to the impact of certain human element, as tired, operation is unfamiliar with or the impact of the situation such as lazy.Therefore, anyly automatically determine moving counterweight weight, and then realize the selection of automatic operating, become a problem demanding prompt solution.
Summary of the invention
In order to overcome above-mentioned defect and the deficiency of prior art, the first object of the present invention is to provide a kind of detecting device that can automatic sensing-detecting movable counter weight of crane, comprising: a pressure-sensing device, for the pressure information of the rod chamber of sensing weight balancing oil cylinder; Controller, comprising:
Memory cell, for depositing the change value of pressure of default described rod chamber and the corresponding relation of moving counterweight weight;
Processing unit, for the pressure information sensing in real time according to described pressure-sensing device, determine corresponding real-time pressure value, and calculate the pressure difference value between the force value in described real-time pressure value and the described rod chamber when moving counterweight not being installed, according to described corresponding relation, select the moving counterweight weight that described pressure difference value is corresponding again.
In order to overcome above-mentioned defect and the deficiency of prior art, the second object of the present invention is to provide a kind of method of inspection of energy automatic sensing-detecting movable counter weight of crane, comprising: the pressure information of the rod chamber of pressure-sensing device sensing weight balancing oil cylinder; The pressure information that controller senses in real time according to described pressure-sensing device is determined corresponding real-time pressure value, and calculate the pressure difference value between the force value in described real-time pressure value and the described rod chamber when moving counterweight not being installed, according to the change value of pressure in default described rod chamber and the corresponding relation of moving counterweight weight, select the moving counterweight weight that described pressure difference value is corresponding again.
Pressure information in the weight balancing oil cylinder that various embodiments of the present invention sense in real time by pressure-sensing device, and then determine the moving counterweight weight corresponding with this pressure information, realized and automatically determined moving counterweight weight, be conducive to realize the automatic selection of hanging year operating mode.
Accompanying drawing explanation
Fig. 1 is the detecting device embodiment of movable counter weight of crane of the present invention position view on hoisting crane;
Fig. 2 is the structural representation of the detecting device embodiment of movable counter weight of crane of the present invention;
Fig. 3 is the example structure schematic diagram of the detecting device middle controller of movable counter weight of crane of the present invention;
Figure 4 shows that the embodiment diagram of circuit of the method for inspection of movable counter weight of crane of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figures 1 and 2, the present embodiment can comprise: two pressure sensors 12 and 14, controller 16 and telltale 18; Wherein, pressure sensor 12 is for the pressure information of the rodless cavity of sensing weight balancing oil cylinder 10, and pressure sensor 14 is for the pressure information of the rod chamber of sensing weight balancing oil cylinder 10; Controller 16 calculates the weight of current active counterweight by two pressure sensors 12 and 14 pressure informations that gather; Work information is carried in the balance weight that telltale 18 sends for display control switch 16 and corresponding hanging thereof, and selects information for receiving operating mode, and this operating mode selection information is sent to controller 16.
Above-mentioned weight balancing oil cylinder 10, pressure sensor 12 and 14, controller 16 and read-out 16 position scheme of installation on hoisting crane is shown in Fig. 1.
Wherein, this controller 16 is according to the sensing signal of two pressure sensors 12 and 14, and the process specific explanations of computational activity configuration weight is as follows:
With a weight balancing oil cylinder, analyze, when moving counterweight not being installed, signal ，Ji great chamber sensing (corresponding rodless cavity) signal recording according to two pressure sensors 12,14 is P1, loculus (corresponding rod chamber) signal is P2, and obtaining the pulling force that weight balancing oil cylinder bears is that F0 is:
Wherein, D, d are respectively the large chamber of weight balancing oil cylinder and loculus diameter, and π is circular constant;
If a moving counterweight is installed, according to computing formula above, obtaining the pulling force that weight balancing oil cylinder bears is F1; Can draw equally the suffered tensile force f 2 of weight balancing oil cylinder when two counterweights are installed, the tensile force f 3 when 3 counterweights are installed; According to the gravity of moving counterweight, be weight balancing oil cylinder and moving counterweight be installed and the difference of pressure between moving counterweight is not installed, the account form that can obtain disposable weight M is:
M＝(Fi-F0)÷g （2）
Wherein g is gravity coefficient.
Further, this controller 16, after obtaining the weight of moving counterweight, calculates total balance weight according to the fixed weight weight prestoring, and then according to the corresponding relation between total balance weight and operating mode, operating mode is carried in corresponding the hanging of selection automatically, further, this controller 16 can also by total balance weight and with it corresponding operating mode be sent to telltale 18 and show to point out operating mode is selected, after receiving operating mode selection information, this operating mode selection information is back to controller 16, correspondingly, manual selection operating mode can be set in controller 16 and automatically select the priority of operating mode, as: if the priority of manual selection is set when high, at telltale 18, return after operating mode selection information, according to this operating mode selection information, operate, when telltale 18 does not return to operating mode selection information, directly according to the information of automatic selection operating mode, operate, certainly, during practical operation, also priority can be set, when having manually selection and automatically selecting, the operating mode definite according to any selection mode operates.
During concrete operations, can also by approach switch, can whether sensing be installed by moving counterweight by setting up the approach switch (not shown) being connected with controller 16, and the installation number of moving counterweight.
It will be understood by those skilled in the art that except utilizing the pressure information in pressure sensor senses weight balancing oil cylinder, can also utilize pressure switch equipressure measuring cell to reach goal of the invention, can change the electrical connection between pressure sensor and controller 16 into wireless connections mode, in addition, because crane-car assembles different moving counterweights, in weight balancing oil cylinder, the suffered pulling force in each chamber is naturally also different, the pressure information that utilization collects from weight balancing oil cylinder pressure sensor, these pressure informations are arranged, sum up, draw different balance weights and the corresponding relation of pressure information, therefore can realize pressure information collection by measuring force value variation rod chamber greatly, the change value of pressure of corresponding default rod chamber after moving counterweight is installed and between while moving counterweight not being installed and the corresponding relation between moving counterweight weight, as: when filling a counterweight, the difference of pressure that rod chamber is corresponding (be fill a force value after counterweight and force value when assembling is heavy between difference) be p1, fill No. one and difference of pressure during No. two counterweights is p2, when filling No. one and during No. three counterweights, difference of pressure is p3, like this, according to change value of pressure in rod chamber and above-mentioned corresponding relation, can draw the weight that causes this pressure to occur the active configuration of variation.
The present invention detects the pressure information in weight balancing oil cylinder by pressure sensor, and then according to this pressure information, determines the weight of moving counterweight by controller, has realized the automatic acquisition of moving counterweight information; Further, according to the corresponding relation of balance weight and operating mode, automatically select corresponding hanging to carry operating mode, realize corresponding the hanging of selection automatically and counterweight and carry an operating mode, avoided the impact of human element; Preferably, can also determine corresponding the hanging after year operating mode of total balance weight at controller, by balance weight with it corresponding hanging carry an operating mode and be sent in telltale, alert selects correct hanging to carry operating mode, to avoid carrying because hanging the generation of hanging year fault that operating mode selects mal to produce, thereby increased the use safety factor of hoisting crane; This scheme design is with low cost, only need to gather pressure sensor data, utilizes existing controller and telltale resource, need not increase extra cost, and the required device of whole device is fewer, is convenient to install, debugging, safeguard.
As shown in Figure 3, controller 16 can comprise:
Transmit-Receive Unit 160, for carrying out information interaction with pressure sensor, telltale etc.; As receive a pressure sensor or two pressure informations that pressure sensor transmits, receive the operating mode selection information of telltale transmission etc.;
Calculating unit 162, poor with the pulling force bearing when moving counterweight not being installed when moving counterweight is installed for calculating weight balancing oil cylinder, then be defined as with the ratio of acceleration due to gravity the moving counterweight weight that weight balancing oil cylinder is corresponding by pulling force is poor; The pulling force that weight balancing oil cylinder bears is that F determines according to formula (1);
Operating mode determining unit 165, for according to default moving counterweight weight and the corresponding relation of operating mode, selects corresponding the hanging of moving counterweight weight to carry operating mode automatically.
embodiment of the method
Fig. 4 is the embodiment diagram of circuit of method, and explaining of Fig. 1, Fig. 2, Fig. 3 all adapts with the present embodiment, as shown in Figure 4, comprising:
Step 402, the pressure information of pressure-sensing device sensing weight balancing oil cylinder;
Preferably, when the number of pressure-sensing device is two, this step 402 can comprise:
The first pressure-sensing device in pressure-sensing device, the pressure information of the rodless cavity of sensing weight balancing oil cylinder;
The second pressure-sensing device in pressure-sensing device, the pressure information of the rod chamber of sensing weight balancing oil cylinder;
When the number of pressure-sensing device is one, this step 402 can comprise:
The pressure information of the rod chamber of pressure-sensing device sensing weight balancing oil cylinder;
Step 404, controller determines according to pressure information the moving counterweight weight that weight balancing oil cylinder is corresponding;
Preferably, when the number of pressure-sensing device is two, this step 404 can comprise:
It is poor with the pulling force bearing when moving counterweight not being installed when moving counterweight is installed that controller calculates weight balancing oil cylinder, then be defined as with the ratio of acceleration due to gravity the moving counterweight weight that weight balancing oil cylinder is corresponding by pulling force is poor;
The pulling force that weight balancing oil cylinder bears is F, refers to above-mentioned formula (1);
When the number of pressure-sensing device is one, this step 404 can comprise:
The pressure information that controller senses in real time according to pressure-sensing device is determined corresponding real-time pressure value, and calculate the pressure difference value between the force value in real-time pressure value and the rod chamber when moving counterweight not being installed, again according to the corresponding relation of the change value of pressure in default rod chamber and moving counterweight weight, the moving counterweight weight that selection pressure difference is corresponding;
Step 406, according to default moving counterweight weight and the corresponding relation of operating mode, selects corresponding the hanging of moving counterweight weight to carry operating mode automatically.
Corresponding to known to explaining of Fig. 1-Fig. 3, step 406 is preferred scheme, and it has realized automatic selection operating mode, avoids the error of manual operation; During concrete operations, can also comprise: the step showing by telltale and telltale transmit the step of operating mode selection information etc.; That is to say, in Fig. 1-Fig. 3, the operation of each element and function are all applicable to this method embodiment.
The present embodiment obtains the pressure information of weight balancing oil cylinder by pressure sensor etc., and then determines moving counterweight weight by controller; Preferably, can automatically select hang corresponding with counterweight to carry operating mode by controller, can also corresponding the hanging of moving counterweight be carried to display of regime by telltale and supply its selection to operator, thereby avoided because selecting wrong hanging to carry operating mode generation accident, meanwhile, for realizing the intellectuality control of hoisting crane, lay a good foundation.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. a detecting device for movable counter weight of crane, is characterized in that, comprising:
A pressure-sensing device, for the pressure information of the rod chamber of sensing weight balancing oil cylinder;
Controller, comprising: memory cell, for depositing the change value of pressure of default described rod chamber and the corresponding relation of moving counterweight weight;
Processing unit, for the pressure information sensing in real time according to described pressure-sensing device, determine corresponding real-time pressure value, and calculate the pressure difference value between the force value in described real-time pressure value and the described rod chamber when moving counterweight not being installed, according to described corresponding relation, select the moving counterweight weight that described pressure difference value is corresponding again.
2. detecting device according to claim 1, is characterized in that, also comprises: the approach switch being connected with described controller, and for the quantity of sensing moving counterweight.
3. detecting device according to claim 1 and 2, is characterized in that, described controller also comprises:
Operating mode determining unit, according to default moving counterweight weight and the corresponding relation of operating mode, selects corresponding the hanging of described moving counterweight weight to carry operating mode automatically.
4. detecting device according to claim 3, is characterized in that, also comprises:
The telltale being connected with described controller, for showing year operating mode of hanging of described moving counterweight weight and correspondence, and receives operating mode selection information, and described operating mode selection information is sent to described controller.
5. according to the detecting device described in the claims 1 or 2, it is characterized in that, described pressure-sensing device is pressure sensor or pressure switch.
6. a method of inspection for movable counter weight of crane, is characterized in that, comprising:
The pressure information of the rod chamber of pressure-sensing device sensing weight balancing oil cylinder;
The pressure information that controller senses in real time according to described pressure-sensing device is determined corresponding real-time pressure value, and calculate the pressure difference value between the force value in described real-time pressure value and the described rod chamber when moving counterweight not being installed, according to the change value of pressure in default described rod chamber and the corresponding relation of moving counterweight weight, select the moving counterweight weight that described pressure difference value is corresponding again.
7. according to the method for inspection described in the claims 6, it is characterized in that, after described determining step, also comprise:
According to default moving counterweight weight and the corresponding relation of operating mode, automatically select corresponding the hanging of described moving counterweight weight to carry operating mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110146861.7A CN102249152B (en) | 2011-06-01 | 2011-06-01 | Device and method for detecting movable counter weight of crane |
| PCT/CN2012/074210 WO2012163190A1 (en) | 2011-06-01 | 2012-04-17 | Device and method for detecting movable counterweight of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110146861.7A CN102249152B (en) | 2011-06-01 | 2011-06-01 | Device and method for detecting movable counter weight of crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102249152A CN102249152A (en) | 2011-11-23 |
| CN102249152B true CN102249152B (en) | 2014-01-15 |
Family
ID=44976795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110146861.7A Expired - Fee Related CN102249152B (en) | 2011-06-01 | 2011-06-01 | Device and method for detecting movable counter weight of crane |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102249152B (en) |
| WO (1) | WO2012163190A1 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102249152B (en) * | 2011-06-01 | 2014-01-15 | 三一汽车起重机械有限公司 | Device and method for detecting movable counter weight of crane |
| CN102602831A (en) * | 2012-03-26 | 2012-07-25 | 徐州重型机械有限公司 | Safety detecting device for installation of counterweight of large-tonnage crane |
| EP2847119B1 (en) * | 2012-05-09 | 2019-04-10 | Manitowoc Crane Companies LLC | Crane monitoring system |
| EP2799386B1 (en) | 2013-05-03 | 2016-11-09 | Manitowoc Crane Group France SAS | Device and method for determination and monitoring a counterweight which is fitted to a crane |
| CN103573728B (en) * | 2013-11-13 | 2017-02-01 | 中联重科股份有限公司 | Device, method and system for controlling hydraulic oil cylinder and engineering machine |
| CN103935895B (en) * | 2014-05-08 | 2016-02-10 | 天津港第五港埠有限公司 | Door machine counterweight special measurement instrument |
| CN105217468B (en) * | 2015-10-22 | 2017-08-04 | 中联重科股份有限公司 | The detection method of the load of crane gear and its counterweight loading equipemtn and counterweight |
| DE102016203607B4 (en) * | 2016-03-04 | 2020-02-06 | Tadano Faun Gmbh | crane |
| US11097927B1 (en) | 2016-04-20 | 2021-08-24 | Link-Belt Cranes, L.P., Lllp | Lifting machine with counterweight sensing system and related methods |
| DE102016014571B4 (en) * | 2016-12-07 | 2021-07-29 | Liebherr-Werk Ehingen Gmbh | Crane with device for determining the effective counterweight of the crane |
| CN106881359A (en) * | 2017-01-06 | 2017-06-23 | 北京首钢股份有限公司 | A kind of preparation method of strip lumber recovery |
| DE102017000431B4 (en) | 2017-01-18 | 2022-01-05 | Liebherr-Werk Ehingen Gmbh | Device for measuring the weight of a ballast body |
| DE102017001533A1 (en) | 2017-02-15 | 2018-08-16 | Liebherr-Werk Ehingen Gmbh | Device and method for ballast weighing on a crane and a corresponding crane |
| CN107720558B (en) * | 2017-10-13 | 2019-08-16 | 徐州重型机械有限公司 | Crane and its working condition determining method and device |
| CN108383018B (en) * | 2018-04-01 | 2019-12-06 | 江苏宏昌天马物流装备有限公司 | Control method of counterweight system of folding arm crane |
| CN108502734B (en) * | 2018-04-25 | 2023-05-02 | 宁波城市职业技术学院 | Crane with gravity center adjusting device and adjusting method thereof |
| CN108439219A (en) * | 2018-06-13 | 2018-08-24 | 江苏建筑职业技术学院 | Can automatic identification weight balance weight system and control method |
| CN110950247B (en) * | 2019-12-30 | 2021-08-13 | 徐州重型机械有限公司 | Crane counterweight combination identification method and system and crane |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1154200A1 (en) * | 1982-01-22 | 1985-05-07 | Опытно-Конструкторское Бюро "Роботы" Научно-Производственного Объединения "Комплекс" | Balancing hoist |
| JPS6213618A (en) * | 1985-07-09 | 1987-01-22 | Yutani Juko Kk | Balance of oil-pressure shovel |
| CN2161592Y (en) * | 1991-12-29 | 1994-04-13 | 铁道部宝鸡工程机械厂 | Lifting force moment limiter for microcomputer drive |
| JPH06135691A (en) * | 1992-10-26 | 1994-05-17 | Fujitsu Ltd | Weight balance detecting device |
| JPH08217382A (en) * | 1995-02-14 | 1996-08-27 | Hitachi Constr Mach Co Ltd | Counter weight mounting condition detecting device |
| JPH10203784A (en) * | 1997-01-23 | 1998-08-04 | Hitachi Constr Mach Co Ltd | Counterweight detection device of construction machine |
| JP4678233B2 (en) * | 2005-05-16 | 2011-04-27 | コベルコクレーン株式会社 | Crane and its weight detection device |
| CN100465846C (en) * | 2006-09-15 | 2009-03-04 | 上海三一科技有限公司 | Crawler crane torque controlling method and apparatus under super lifting working condition |
| CN200951937Y (en) * | 2006-09-15 | 2007-09-26 | 上海三一科技有限公司 | Moment control device under super lifting working condition of caterpillar crane |
| CN100427771C (en) * | 2006-12-14 | 2008-10-22 | 浙江大学 | Energy saving hydraulic lifting system of variable hydraulic counterweight |
| CN101934989A (en) * | 2010-06-04 | 2011-01-05 | 何昀旭 | Dynamic balance building tower crane |
| CN102249152B (en) * | 2011-06-01 | 2014-01-15 | 三一汽车起重机械有限公司 | Device and method for detecting movable counter weight of crane |
-
2011
- 2011-06-01 CN CN201110146861.7A patent/CN102249152B/en not_active Expired - Fee Related
-
2012
- 2012-04-17 WO PCT/CN2012/074210 patent/WO2012163190A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN102249152A (en) | 2011-11-23 |
| WO2012163190A1 (en) | 2012-12-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102249152B (en) | Device and method for detecting movable counter weight of crane | |
| CN201834649U (en) | State monitoring device for disc brake of mining hoist | |
| CN101934990B (en) | Load moment limiter-based crawling crane anti-overturn device and method | |
| CN106891914A (en) | Rail clip working state of system real-time monitoring device, system and method | |
| CN201686411U (en) | Crane lifting monitoring system | |
| CN202379636U (en) | Measuring and controlling device for running state of tower crane | |
| CN203212149U (en) | Online monitoring alarm device for elevator car vibration | |
| CN105021336B (en) | A kind of test platform to steel wire rope tension balance wireless monitor system calibration | |
| CN203572887U (en) | Wireless three dimensional electric field measurement alarm device | |
| CN202782852U (en) | Vehicle load self measuring device and car | |
| CN104340895A (en) | Monitoring system and monitoring method for safety of tower crane | |
| CN102030273A (en) | Tower crane, lifting mechanism thereof and method for leveling lifting mechanism | |
| CN107651547A (en) | The detection method and system of a kind of coal mine lifting system running state and lifting tension force | |
| CN206096875U (en) | Bridge remote automation real -time supervision device based on MEMS technique | |
| CN103606240B (en) | Adopt the method that distributed optical fiber temperature transducer system carries out fire alarm | |
| CN202166542U (en) | Cluster bridge health real time monitoring system based on wireless communication technology | |
| CN103134697B (en) | The method for diagnosing faults of concrete mixer vibration insulating system and system and concrete mixer | |
| CN103274304B (en) | Method for dynamically adjusting monitoring and safety pre-warning threshold values of crane structure | |
| CN103115785B (en) | Fault diagnosis method and system of vibration reduction system of concrete pump car and concrete pump car | |
| CN206475888U (en) | Rail clip working state of system real-time monitoring device and system | |
| CN203024763U (en) | Construction beam posture monitoring system | |
| CN111622285B (en) | Energy efficiency detection system and method for excavator and excavator | |
| CN201413464Y (en) | Monitoring system of mobile equipment with arm support | |
| CN206095227U (en) | No wire mounting deviational survey device | |
| CN203112356U (en) | Wireless detection device for lifting hook dip angle of crawler crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20190601 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |