CN102530674A - Calibration method for overload protector on lifter - Google Patents
Calibration method for overload protector on lifter Download PDFInfo
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- CN102530674A CN102530674A CN2011103666114A CN201110366611A CN102530674A CN 102530674 A CN102530674 A CN 102530674A CN 2011103666114 A CN2011103666114 A CN 2011103666114A CN 201110366611 A CN201110366611 A CN 201110366611A CN 102530674 A CN102530674 A CN 102530674A
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Abstract
The invention provides a calibration method for an overload protector on a lifter, which comprises the following steps of: confirming whether only an operator stays in a lifter cage or not; when only the operator stays in the lifter cage, measuring a load signal C by a force transducer, transmitting the load signal C to the overload protector, converting the load signal C into a digital signal G under the action of the overload protector, and according to total weight D of pre-obtained cage net weight and operator weight, obtaining a proportionality factor K=D/G; after the cage is loaded, measuring another load signal F by the force transducer, converting the load signal F into a digital signal Q under the action of the overload protector, wherein C/G=F/Q, and according to K, obtaining the total weight of the cage no-load weight and the cage inner load weight M=K*Q=D*F/C; and obtaining a cage inner load weight value X=M-D=D(F/C-1). The method is reliable in work, high in efficiency, and wide in applicable scope. The method is not only suitable for the overload protector on the lifter, but also applicable to the other similar occasions.
Description
Technical field
The present invention relates to technical field of engineering machinery, relate to a kind of calibration method of lifter excess load fender guard.
Background technology
Building hoist is the large-scale implement of building ground; It mainly acts on is vertical transport build labourer and small-sized material in high building is built; Along with the continuous development of building industry, skyscraper is more and more, and the consumption of building hoist is also increasing; But the safety misadventure that is accompanied by also happens occasionally, and the whole nation is annual all to have a lot of particularly serious accidents that have personal injury to take place.From all analysis on accident cause results, the lifter excess load operation is an assignable cause.
For the overload protection device of building hoist, domestic had nearly 10 years research and development historical, several years ago; The relevant pressure standard of country has stressed that also all building hoists that dispatch from the factory must dispose overload protection device, because the increase of use amount, manufacturer has developed into family more than 10 at present; The principle of product and version are all similar; Force transducer has two kinds of mounting meanss: a kind of is that the pin type sensor is contained between driver plate and the cage, and second kind is that force transducer is installed between driver plate and the driver plate fixed frame, except the force transducer with this dual mode detects the overall weight of cage; Also judge through amplification, signal processing circuit whether the load of cage overloads; If overload has taken place, provide acousto-optic hint, provide the control loop power supply that on-off signal cuts off elevator simultaneously; After the load of cage reduced to certain value, the on-off signal of device resetted, and elevator can normally move.After overload protection device is assembled on the building hoist, improved the safety in operation of China's elevator, reduced the serious accident that causes by overload, shortened gap with the advanced product in the world.
At present; After must initially debugging after installing and be provided with, could normally use existing overload protection device; The purpose of debugging is exactly to make the displayed value of overload protection device and actual load value consistent, all must pass through following plurality of processes generally speaking: at first zero clearing, when cage is sky; Press the reset key on the fender guard panel; The signal condition loop of the fender guard just weight signal sent here at this moment of sensor is set to signal zero, and to make displayed value be zero, claims that usually this process is clear tare weight; Load debugging then; Let cage load onto the load more than one ton, through keyboard input actual load value, the actual load value of importing on weight signal that the signal condition loop of fender guard just can be sent here through sensor at this moment and the keyboard; And the weight signal of combination during zero point; Obtain the weight signal value that sensor sends here and the relativeness of displayed value, different load can produce the different sensor weight signal, and the signal condition loop of fender guard just can obtain displayed value through the relativeness of setting up; When displayed value surpassed preset value, fender guard was made corresponding action.After accomplishing setting, clearance test load, elevator can drop into normal use.
As stated, load debugging through the load that elevator craning cage is loaded onto more than one ton, there is following problem in the method that this employing standard weight is demarcated overload protection device: at the construction field (site), the general load of elevator is many more than two tons; If will demarcate through above-mentioned calibration method, the load fitness for purpose wants to find the standard weight more than a ton about one ton; Perhaps can manage it at the overload protection device originating firm, but at the construction field (site), if demarcate; Often need load 100 kilograms bag of cement to it through artificial; Waste time and energy, labour intensity is big, inefficiency.So at the construction field (site), if there is not specific (special) requirements, a lot of construction parties directly save this debug process, like this, tend to the safe operation of elevator has been brought serious hidden danger.
On the existing overload protection device panel, be provided with 4 or above button, if the user does not read over service instructions; Often do not know to begin to set, and the user group of elevator is common labourer mostly so numerous and diverse button order from what; To them too high requirement has been proposed; So under most of situation, overload protection device is disorderly set or is not simply set often.
Summary of the invention
In order to overcome the above-mentioned defective that prior art exists, it is a kind of time saving and energy saving that the present invention provides, and labour intensity is little, the calibration method of reliable operation, lifter excess load fender guard that efficient is high.
Technical scheme of the present invention is: it may further comprise the steps:
(1) confirms in the elevator craning cage whether the operator only to be housed, confirm promptly whether cage is being unloaded except that the operator;
(2) operator only is housed in elevator craning cage; Promptly when except that the operator, being zero load, be installed in force transducer on the elevator under the cage light condition, will record a load signal C and pass to overload protection device; This load signal C is an electric signal; Electric signal converts to behind overload protection device and the load signal of sensor digital signal one to one, and load signal C converts a digital signal G under the overload protection device effect, at this moment; Total weight D according to the cage net weight that obtains from the elevator originating firm in advance and operator's body weight of learning in advance; Try to achieve a proportionality coefficient K=D/G, and store it, this proportionality coefficient is a weight that force transducer bore and the ratio of the digital signal value of the corresponding acquisition of overload protection device;
(3) after cage loads; Force transducer records another load signal F at this moment, and this load signal F also is an electric signal, and load signal F converts another digital signal Q under the effect of overload protection device; And C/G=F/Q; Be Q/G=F/C,, obtain the total weight M=K*Q=D*Q/G=D*F/C of load weight in unloaded weight of cage and the cage according to the proportionality coefficient K that tries to achieve in the step (2);
(4) try to achieve cage and contain loading value X=M-D=D*F/C-D=D (F/C-1).
Further, the load signal (electric signal) that records of force transducer converts under the effect in the signal condition loop of overload protection device and the load signal of sensor digital signal one to one.
Further, proportionality coefficient K tries to achieve and stores in the s operation control loop that all occurs in overload protection device, and the s operation control loop comprises the center processing unit that is made up of a micro controller system.Trying to achieve and storing specifically of proportionality coefficient K occurs in the center processing unit.
When force transducer is stressed when being zero; The load signal that reaches the signal condition loop of fender guard also is zero; After force transducer is installed on the elevator, when elevator craning cage is unloaded, the just weight of cage of being born on the force transducer; And the weight of cage immobilizes mostly; And convenient (the cage weight of the most of elevator of China is many between the 1.5-2 ton) that obtain through the elevator originating firm, the load signal value that force transducer is sent here converts to behind overload protection device and the load signal of sensor digital signal one to one, and this moment is through knowing the accurate weight of cage; And just can set up a calculated relationship according to the load signal value that current force transducer is sent here, in the hope of big or small to any load condition actual displayed value down.
Use the present invention, can only need to accomplish demarcation on the overload protection device, and in calibration process, need not add standard load by next key; Time saving and energy saving, labour intensity is little, and is simple to operate; Only need when cage is zero load, the demarcation key of pressing on the lower faceplate gets final product, and has simplified demarcating steps, the process of overload protection device; Make to demarcate to be provided with and become simple; Dispatching from the factory precedingly or in use no matter be elevator, all can accomplish demarcation quickly and easily at any time, letting overload protection device really accomplish the safe operation of elevator is played a protective role.
Reliable operation of the present invention, efficient height, applied widely.The present invention is not only applicable to the overload protection device on the elevator, equally also can be applicable to other similar applications.Calibration process can be simply accomplished in the application of the invention, accurately obtains load weight in the cage, helps improving the safety in operation of China's elevator, reduces the serious accident that is caused by overload, shortens the gap with the advanced product in the world.
Description of drawings
Fig. 1 is a lifter excess load fender guard structural representation of the present invention;
Fig. 2 is the calibration method flow process of lifter excess load fender guard of the present invention;
Fig. 3 is a kind of enforcement physical circuit figure in signal condition loop;
Fig. 4 is a kind of enforcement physical circuit figure in s operation control loop.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
With reference to Fig. 1, the lifter excess load fender guard comprises force transducer 1, signal condition loop 2, s operation control loop 3, host side wireless receiving and dispatching loop 4, display end wireless receiving and dispatching loop 5, display unit 6 and uninterrupted power supply (UPS) loop 7.
Force transducer 1 is installed on the hanger between building hoist driver plate and the cage, perhaps is installed between driver plate and its fixed frame; But signal condition loop 2 and s operation control loop 3 can be installed in the electric cabinet of elevator also independent stationary on elevator craning cage; Display unit 6 is fixed on from the nearer place of operator; Force transducer 1, signal condition loop 2, s operation control loop 3 connect successively, provide the uninterrupted power supply (UPS) loop 7 of working power to be installed in the electric cabinet to overload protection device.
Force transducer 1 is used to measure the actual load of cage and obtains and cage weight electric signal one to one, and the signal that signal condition loop 2 is just sent here sensor is through amplifying, output to s operation control loop 3 behind filtering f and the level conversion v, judges and the judgement of data variation increment threshold values through the center processing unit M threshold values that overloads; When data surpass the overload threshold values; Open Control Node K, make elevator stop operation, send cooresponding alert data to give Tip element L; Provide suitable acousto-optic hint; Simultaneously be sent to host side wireless receiving and dispatching loop 4 to alert data, and open memory cell R, note this moment time and alarming value; When data did not surpass the overload threshold values, Control Node K kept closure state, sent corresponding data to give Tip element L prompting load condition; Simultaneously send main frame wireless receiving and dispatching loop 4 data, simultaneously, center processing unit M also will carry out variable quantity to this secondary data and last data relatively; If variable quantity surpasses the threshold values of setting, just open memory cell R, note this data value and current time; If do not surpass, just do not note down.
Uninterrupted power supply (UPS) loop 7 is made up of battery B and control circuit C, and when civil power, control circuit C directly offers device to the required direct supply of civil power alternative cost device and uses, and judges also that simultaneously whether battery B needs charging, like needs, must charge to it; When no civil power, control circuit C will be supplied power to device after certain conversion by battery B.
With reference to Fig. 2, the calibration method of present embodiment lifter excess load fender guard may further comprise the steps:
The operator only is housed in elevator craning cage, promptly when except that the operator, being zero load, execution in step 02; Be installed in force transducer on the elevator under the cage light condition, pass to the signal condition loop of overload protection device with recording a load signal C, this load signal C is an electric signal; Electric signal converts to and the load signal of sensor digital signal one to one behind the signal condition loop of overload protection device, and load signal C converts a digital signal G under the overload protection device effect; This digital signal G reaches the s operation control loop of overload protection device; At this moment, the center processing unit in the s operation control loop of overload protection device is according to the total weight D of the cage net weight that obtains from the elevator originating firm in advance and operator's body weight of learning in advance; And this digital signal G; Try to achieve a proportionality coefficient K=D/G, and store it, this proportionality coefficient is a weight that force transducer bore and the ratio of the digital signal value of the corresponding acquisition of overload protection device;
After the execution of step 02, execution in step 03 is after cage loads; Force transducer records another load signal F at this moment; This load signal F also is an electric signal, and load signal F converts another digital signal Q under the effect of the signal condition loop of overload protection device, and C/G=F/Q; Be Q/G=F/C; Center processing unit in the s operation control loop of overload protection device according to the digital signal Q that the proportionality coefficient K that tries to achieve in the step (2) and cage stress state obtain down, obtains the total weight M=K*Q=D*Q/G=D*F/C of unloaded heavy and the interior load weight of cage of cage;
(4) center processing unit in the s operation control loop of overload protection device, according to the total weight of load weight in unloaded weight of cage this moment and the cage, and cage net weight D, try to achieve cage and contain loading value X=M-D=D*F/C-D=D (F/C-1).
Try to achieve cage contain the loading value through display unit 6 with the corresponding conversion of data after, be shown on the display interface of overload protection device.
Fig. 3 is a kind of enforcement physical circuit figure in signal condition loop; The millivolt signal that sensor signal is come is after IC1 amplifies; By IC2 filtering, send IC4 to carry out the A/D conversion by IC3 adjustment level to suitable level state again, by IC4 output and sensor signal digital signal one to one.Under the cage light condition and under the stress state, all can obtain digital signal corresponding.
Fig. 4 is a kind of enforcement physical circuit figure in s operation control loop; Manage the digital signal that the loop is sent here by micro controller system IC5 receiving signal; Constitute center processing unit by IC5, IC6, IC7, IC7, IC8, accomplish trying to achieve and other work (like the comparison of overload threshold values, send demonstrations, parameter to store and the work of driving switch amount etc.) of actual load weight in the cage.
Use the present invention, can only need to accomplish demarcation on the overload protection device, when cage is unloaded by next key; The user presses this key; The force transducer that is installed on the elevator is just started working, and the load signal that records is passed to overload protection device, and overload protection device is according to this load signal and cage net weight; Set up a calculated relationship, obtain the actual displayed value size under any load condition.
Combine accompanying drawing that the preferred embodiment for the present invention has been done detailed description above; But the present invention is not limited to above-mentioned embodiment; Within the ken that those of ordinary skills possessed, can also under the prerequisite that does not break away from aim of the present invention, make various variations.
Claims (3)
1. the calibration method of lifter excess load fender guard is characterized in that, may further comprise the steps:
(1) confirms in the elevator craning cage whether the operator only to be housed, confirm promptly whether cage is being unloaded except that the operator;
(2) operator only is housed in elevator craning cage; Promptly when except that the operator, being zero load, be installed in force transducer on the elevator under this light condition, will record a load signal C and pass to overload protection device; This load signal C is an electric signal; Electric signal converts to behind overload protection device and the load signal of sensor digital signal one to one, and load signal C converts a digital signal G under the overload protection device effect, at this moment; Total weight D according to the cage net weight that obtains from the elevator originating firm in advance and operator's body weight of learning in advance; Try to achieve a proportionality coefficient K=D/G, and store it, this proportionality coefficient is a weight that force transducer bore and the ratio of the digital signal value of the corresponding acquisition of overload protection device;
(3) after cage loads; Force transducer records another load signal F at this moment, and this load signal F also is an electric signal, and load signal F converts another digital signal Q under the effect of overload protection device; And C/G=F/Q; Be Q/G=F/C,, obtain the total weight M=K*Q=D*Q/G=D*F/C of load weight in unloaded weight of cage and the cage according to the proportionality coefficient K that tries to achieve in the step (2);
(4) try to achieve cage and contain loading value X=M-D=D*F/C-D=D (F/C-1).
2. the calibration method of lifter excess load fender guard according to claim 1; It is characterized in that the load signal that force transducer records converts to and the load signal of sensor digital signal one to one under the effect in the signal condition loop of overload protection device.
3. the calibration method of lifter excess load fender guard according to claim 1 and 2; It is characterized in that; Proportionality coefficient K tries to achieve and stores in the s operation control loop that all occurs in overload protection device; The s operation control loop comprises the center processing unit that is made up of a micro controller system, and trying to achieve and storing specifically of proportionality coefficient K occurs in the center processing unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110366611.4A CN102530674B (en) | 2011-11-18 | 2011-11-18 | Calibration method for overload protector on lifter |
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| CN201110366611.4A CN102530674B (en) | 2011-11-18 | 2011-11-18 | Calibration method for overload protector on lifter |
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| CN102530674A true CN102530674A (en) | 2012-07-04 |
| CN102530674B CN102530674B (en) | 2014-02-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860149A (en) * | 2015-04-21 | 2015-08-26 | 深圳市海浦蒙特科技有限公司 | Detecting method of building hoist load and frequency converter |
| CN108545565A (en) * | 2018-06-05 | 2018-09-18 | 深圳市特种设备安全检验研究院 | A kind of traction elevator ceiling capacity transfer efficiency computational methods and terminal |
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| JPH07330245A (en) * | 1994-06-07 | 1995-12-19 | Mitsubishi Electric Corp | Apparatus for detecting and adjusting load on elevator |
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| CN201834629U (en) * | 2010-09-25 | 2011-05-18 | 倪建军 | Overload protecting device for impact load resisting construction lifter |
| CN102101618A (en) * | 2009-12-22 | 2011-06-22 | 中国建筑科学研究院建筑机械化研究分院 | Method and system for detecting wire ropes of elevator |
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2011
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5343003A (en) * | 1992-05-29 | 1994-08-30 | Otis Elevator Company | Recalibration of hitch load weighing using dynamic tare |
| JPH07330245A (en) * | 1994-06-07 | 1995-12-19 | Mitsubishi Electric Corp | Apparatus for detecting and adjusting load on elevator |
| CN1266811A (en) * | 1999-01-29 | 2000-09-20 | Lg.Otis电梯有限公司 | Device and method for measuring loadage and load compensating amount of elevator |
| CN201610342U (en) * | 2009-12-04 | 2010-10-20 | 长沙海川自动化设备有限公司 | Anti-interference overload protection device for construction hoist |
| CN201634290U (en) * | 2009-12-04 | 2010-11-17 | 长沙海川自动化设备有限公司 | Construction elevator overload protector with recording function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860149A (en) * | 2015-04-21 | 2015-08-26 | 深圳市海浦蒙特科技有限公司 | Detecting method of building hoist load and frequency converter |
| CN108545565A (en) * | 2018-06-05 | 2018-09-18 | 深圳市特种设备安全检验研究院 | A kind of traction elevator ceiling capacity transfer efficiency computational methods and terminal |
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| CN102530674B (en) | 2014-02-26 |
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