CN102910514A - Elevator car weighing system and weighing method - Google Patents
Elevator car weighing system and weighing method Download PDFInfo
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- CN102910514A CN102910514A CN2012104299189A CN201210429918A CN102910514A CN 102910514 A CN102910514 A CN 102910514A CN 2012104299189 A CN2012104299189 A CN 2012104299189A CN 201210429918 A CN201210429918 A CN 201210429918A CN 102910514 A CN102910514 A CN 102910514A
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Abstract
The invention discloses an elevator car weighing method, comprising the following steps: an open hole used for measuring expansion amount of a steel wire rope is arranged on a magnetic vane, the expansion amount of the steel wire rope is calculated through the change of the output level of each photoelectric inductor passing through the open hole, and the expansion amount of the steel wire rope is utilized for weighing. The invention also provides an elevator car weighing system, comprising the steel wire rope, the elevator car, the magnetic vane and the photoelectric inductors, wherein the steel wire rope is connected between a tractor and the elevator car, the photoelectric inductor is mounted on the elevator car, the magnetic vane is arranged at the door opening zone of an elevator, and when the elevator car moves to the door opening zone, the magnetic vane reaches the space between the photoelectric inductors; the magnetic vane is provided with the open hole for measuring the expansion amount of the steel wire rope, the expansion amount of the steel wire rope is calculated through the change of the output level of each photoelectric inductor passing through the open hole, and the expansion amount of the steel wire rope is utilized for weighing. The elevator car weighing system and the weighing method have the following advantages: the cost is low, no hardware is additionally adopted, a weighing device in the prior art is omitted, only the magnetic vane in the prior art needs to be subjected to hole processing, and the precision is higher.
Description
[technical field]
The present invention relates to the elevator technology field, be specially a kind of lift car weighing system and Weighing method.
[background technology]
At present, in elevator industry, measure the car load-carrying and mainly contain dual mode.The first is to measure the car load-carrying by the deformation of the Shockproof rubber at the bottom of the sedan-chair.When the passenger enters car, be subjected to passenger's gravity at the bottom of the sedan-chair and push Shockproof rubber, the deformation quantity of Shockproof rubber depends on passenger's weight and the characteristic of Shockproof rubber, yet the pressure that the deformation of Shockproof rubber is subject to it is not complete linearity, causes many times measuring inaccurate; In addition, a lot of elevator enterprises are fallen cost and have been adopted Shockproof rubber inferior, and its nonlinear degree is larger, measure more inaccurate, and Shockproof rubber has stronger hysteresis quality, generally in pressure change a few minutes even more fully deformation, has also increased the error of measuring.The second be by at the bottom of sedan-chair or the machine room cable wire end special weighting apparatus be installed weighed.Although this method precision is more reliable, its price is higher, so does not extensively promote on the market.In addition, fag end weighs easily to pulse because of car affects the fag end stressing conditions, affects to a certain extent survey precision.
[summary of the invention]
The object of the invention is to the deficiency for the above prior art existence, provide a kind of cost low high lift car weighing system and the Weighing method of precision that reach.
Another object of the present invention provides the low high lift car Weighing method of precision that reaches of a kind of cost.
To achieve these goals, the present invention is achieved in that a kind of lift car Weighing method, and the stroke by the measuring steel wire rope comes car is weighed.
Preferably, be provided with perforate for measuring steel wire rope stroke at magnetic isolation plate, the height change calculations steel rope stroke that outgoing level can occur during through perforate by photoelectric sensor utilizes the steel rope stroke to weigh.
Described steel rope is connected between towing machine and the car, at car photoelectric sensor is installed, at the region division magnetic isolation plate that opens the door of elevator, when cage operation when opening the door the zone, described magnetic isolation plate is as between the photoelectric sensor; Described magnetic isolation plate is provided with the perforate for measuring steel wire rope stroke.
Described lift car Weighing method also comprises the measuring and calculating step that steel rope is corresponding with car weight.
Described lift car Weighing method also comprises the error correction step that steel rope is corresponding with car weight.
The lift car weighing system, comprise steel rope, car, magnetic isolation plate and photoelectric sensor, described steel rope is connected between towing machine and the car, at car photoelectric sensor is installed, the region division magnetic isolation plate that opens the door at elevator, when cage operation when opening the door the zone, described magnetic isolation plate is as between the photoelectric sensor; Described magnetic isolation plate is provided with the perforate for measuring steel wire rope stroke, and the height change calculations steel rope stroke that outgoing level can occur during by the perforate of photoelectric sensor process utilizes the steel rope stroke to weigh.
Steel rope is the elastic telescopic parts, and its pulling force that is subject to becomes good linear relationship with its deformation quantity, and for survey precision provides guarantee, and when pulling force changed, its speed of response was fast, and hysteresis quality is lower; , carry out the tapping reason on the magnetic isolation plate, photoelectric sensor during through perforate outgoing level height can occur changes, calculate the steel rope stroke foundation be provided, be in particular Microcomputer Collecting calculated signals steel rope stroke foundation be provided.
Compared with prior art, the present invention has the following advantages: with low cost, and need not to increase any hardware, even saved original weighting apparatus, only need that original magnetic isolation plate is done suitable perforate and process; And precision is higher.
[description of drawings]
Structured flowchart when Fig. 1 is lift car weighing system zero load of the present invention;
The structural representation that magnetic isolation plate and photoelectric sensor matched when Fig. 2 was lift car weighing system zero load of the present invention;
Fig. 3 is lift car weighing system at full load structured flowchart of the present invention;
Fig. 4 is the structural representation that lift car weighing system at full load magnetic isolation plate of the present invention and photoelectric sensor match;
Fig. 5 is the structural representation of photoelectric sensor;
Fig. 6 is the graph of a relation of steel rope stroke and car present position;
[specific embodiment]
Below in conjunction with the drawings and specific embodiments to the present invention be described in detail explanation, wherein magnetic isolation plate bore size and hole shape etc. only for using for example, other all modes all belong to the protection domain of this patent.
The lift car weighing system, such as Fig. 1, Fig. 2 and shown in Figure 5, comprise steel rope 2, car 3, magnetic isolation plate 5 and photoelectric sensor 4, described steel rope 2 is connected between towing machine 1 and the car 3, at car 3 photoelectric sensor 4 is installed, at the region division magnetic isolation plate 5 that opens the door of elevator, when car 3 moves to when opening the door the zone, described magnetic isolation plate 5 is as between the photoelectric sensor 4; Described magnetic isolation plate 5 is provided with the perforate for measuring steel wire rope 2 strokes, and the stroke of the height change calculations steel rope 2 that outgoing level can occur during by photoelectric sensor 4 process perforate utilizes the stroke process of steel rope 2 to weigh.Wherein steel rope 2 is used for hanging car 3, and its stroke is the current load-carrying of car 3, i.e. car 3 interior load-carryings are more, and the stroke of steel rope is larger, and as shown in Figure 3 and Figure 4, otherwise car 3 interior load-carryings are fewer, and steel rope 2 strokes are less; Magnetic isolation plate 5 and photoelectric sensor 4 both be used for as tradition judging that car 3 was whether the zone of opening the door (below abbreviation door district), by at magnetic isolation plate 5 perforate being set, be used for measuring steel wire rope 2 and because car 3 interior load-carryings change flexible stroke occur, thereby extrapolate elevator weighing; Can save the weighting apparatus in the car 3, provide cost savings, and Installation and Debugging be convenient, precision is controlled.
A kind of lift car Weighing method utilizes steel rope 2 to be the elastic telescopic parts, and its pulling force that is subject to becomes the principle of good linear relationship with its deformation quantity, come car 3 is weighed by the amount of stretching of measuring steel wire rope 2.The pulling force that steel rope 2 is subject to becomes good linear relationship with its deformation quantity, for survey precision provides guarantee, and when pulling force changed, its speed of response was fast, and hysteresis quality is lower;
Preferably, be provided with perforate for measuring steel wire rope stroke at magnetic isolation plate 5, the height change calculations steel rope stroke that outgoing level can occur during through perforate by photoelectric sensor 4 utilizes steel rope stroke process to weigh.The height variation can occur in outgoing level during the perforate of photoelectric sensor process, calculates the steel rope stroke foundation is provided, and is in particular Microcomputer Collecting calculated signals steel rope stroke foundation is provided.
Wherein, a kind of lift car system is shown in Fig. 1-4, and described steel rope is connected between towing machine and the car, at car 3 photoelectric sensor 4 is installed, at the region division magnetic isolation plate 5 that opens the door of elevator, when car 3 moves to when opening the door the zone, described magnetic isolation plate 5 is as between the photoelectric sensor 4; Described magnetic isolation plate 4 is provided with the perforate for measuring steel wire rope 2 strokes.
In addition, described lift car Weighing method also comprises measuring and calculating step and the steel rope 2 error correction step corresponding with car 3 weight that steel rope is corresponding with car weight.
Embodiment 1
A kind of lift car Weighing method, its concrete operation step comprises:
1, learning procedure (the measuring and calculating step that steel rope is corresponding with car weight)
Mode of learning thinks that for making the elevator microcomputer learn the information such as steel rope stroke measuring from now on car weight provides foundation.Its concrete mode of learning is as follows.
Make car be in light condition, make lift car leveling, namely shown in Figure 2, two photoelectric sensors 4 are intercepted by magnetic isolation plate 5,100% load of then packing in the car, and establishing this elevator payload ratings is 1000kg, the 1000kg weight of then packing in the car, because steel rope behind the weight of packing into occurs to stretch, car position moves down, and then the location status of car becomes state shown in Figure 4 by state shown in Figure 2 at this moment.
Car status is become in the process of state shown in Figure 4 by state shown in Figure 2, the state variation of top photoelectric sensor 4 sequentially is: disconnection-〉 conducting-〉 disconnection-〉 conducting-〉 disconnection-〉 conducting-〉 disconnection-〉 conducting-〉 disconnection, then can confirm to have reentered off-state after photoelectric sensor has passed through four perforates, because magnetic isolation plate obstruct distance in this example is 12.5mm, for reaching the error minimum, estimate that then the photoelectric sensor luminous point is positioned at the mid point of baffle area, then the displacement that occured to Fig. 4 state by Fig. 2 of car is that the stroke that steel rope occurs is:
Steel rope stroke=25mm * 4 (individual hole)=100mm
As seen, the hole count on the magnetic isolation plate is more, and survey precision is higher, and enumerating of these routine data is only convenient for setting forth, and reality can be by increasing number of aperture to improve precision.
Got by upper planar survey, load-carrying is from 0%-100% in the car, and the steel rope stroke is 100mm.
2, the day-to-day operation step of weighing
After finishing above-mentioned learning procedure, the elevator microcomputer has been stored the amount of the stretching 100mm that the car load-carrying is drawn from 0% ~ 100% steel rope, then can daily in service, finish car and weigh.Respond when elevator no-load and to travel to certain layer of flat bed, state as shown in Figure 1, this moment, elevator cage door was opened, the passenger enters, after the passenger entered, steel rope is stressed to be stretched, and car generation trace moves down, if photoelectric sensor detects to such an extent that car moves down apart from being 20mm by said method, then load-carrying is in car this moment:
Load-carrying=20mm/100mm * 1000kg=200kg
Then load-carrying is 200kg in car this moment, i.e. 20% load-carrying, then car is closed the door, and answer calling together in the passenger and travel to another layer flat bed (namely getting back to Fig. 1 state) and the release passenger that opens the door, also enter in the car with stylish passenger, if moved down again 30mm after moving 10mm on the car in this process, car moved down 20mm after then this process finished, and then load-carrying is in car this moment:
Load-carrying=20mm/100mm * 1000kg+200kg=400kg
Then load-carrying is 400kg in car this moment, i.e. 40% load-carrying, by that analogy.
3, the correction step of error
In fact, be subjected to the effect of weight of steel rope, when car lays respectively at top layer and the bottom, the elongation of steel rope was distinguished to some extent when its load-carrying changed, and was especially promoting high larger occasion, and this problem can affect the weighing measurement precision, at this moment, round-off error by the following method:
At first, carry out above-mentioned steel rope stroke at top layer and measure, load-carrying is by 0% ~ 100% when top layer to establish car, and the steel rope stroke is 100mm.Then, also carry out above-mentioned steel rope stroke in lowermost layer and measure, load-carrying is by 0%-100% when lowermost layer to establish car, and the steel rope stroke is 200mm.The stroke of steel rope was linear change when car 3 positions changed from lowermost layer to top layer, established to promote the high 100m that is, then car 3 load-carryings change the relation of steel rope stroke and car present position shown in Fig. 6 curve by 0%-100%.If when car 3 deadhead operations to certain layer and this layer height when being 70m, the passenger enters car 3, car 3 moves down 30mm, then according to upper figure curve, can try to achieve car and at the steel rope stroke of current location is:
Steel rope stroke=70/100 * (200-100)+100=170 (mm)
Then load-carrying is in car this moment:
Load-carrying=30/170 * 1000kg=176.5kg
Although the present invention describes with reference to specific embodiment, this description and not meaning that is construed as limiting the present invention.With reference to description of the invention, other of the disclosed embodiments change, and all can expect for those skilled in the art, and this variation should belong in the affiliated claim limited range.
Claims (6)
1. a lift car Weighing method is characterized in that, the stroke by the measuring steel wire rope comes car is weighed.
2. according to a kind of lift car Weighing method claimed in claim 2, it is characterized in that, be provided with perforate for measuring steel wire rope stroke at magnetic isolation plate, the height change calculations steel rope stroke that outgoing level can occur during by the perforate of photoelectric sensor process utilizes steel rope stroke process to weigh.
3. according to a kind of lift car Weighing method claimed in claim 3, it is characterized in that, described steel rope is connected between towing machine and the car, at car photoelectric sensor is installed, the region division magnetic isolation plate that opens the door at elevator, when cage operation when opening the door the zone, described magnetic isolation plate is as between the photoelectric sensor; Described magnetic isolation plate is provided with the perforate for measuring steel wire rope stroke.
4. according to a kind of lift car Weighing method claimed in claim 2, it is characterized in that, comprise the measuring and calculating step that steel rope is corresponding with car weight.
5. according to a kind of lift car Weighing method claimed in claim 4, it is characterized in that, comprise the error correction step that steel rope is corresponding with car weight.
6. lift car weighing system, it is characterized in that, comprise steel rope, car, magnetic isolation plate and photoelectric sensor, described steel rope is connected between towing machine and the car, at car photoelectric sensor is installed, at the region division magnetic isolation plate that opens the door of elevator, when cage operation when opening the door the zone, described magnetic isolation plate is as between the photoelectric sensor; Described magnetic isolation plate is provided with the perforate for measuring steel wire rope stroke.
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| CN201210429918.9A CN102910514B (en) | 2012-11-01 | 2012-11-01 | Elevator car weighing system and weighing method |
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| CN201210429918.9A CN102910514B (en) | 2012-11-01 | 2012-11-01 | Elevator car weighing system and weighing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105540373A (en) * | 2015-12-25 | 2016-05-04 | 辽宁优力安机电设备有限公司 | Elevator load measuring device and method by using magneto rheological fluid brake |
| WO2016123902A1 (en) * | 2015-02-05 | 2016-08-11 | 江苏蒙哥马利电梯有限公司 | Calculating method for maximum decoration weight of lift car |
| CN107539857A (en) * | 2017-08-30 | 2018-01-05 | 顺德职业技术学院 | A kind of practice teaching elevator of bistable state sensing |
| CN108382941A (en) * | 2018-03-26 | 2018-08-10 | 日立电梯（中国）有限公司 | Elevator overload detector and elevator overload detection method |
| CN109573759A (en) * | 2018-12-19 | 2019-04-05 | 广州广日电梯工业有限公司 | The extended detection of wirerope and means for correcting and method in running process of elevator |
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| US4986391A (en) * | 1989-11-30 | 1991-01-22 | Otis Elevator Company | Elevator load weighing |
| CN1622914A (en) * | 2002-02-28 | 2005-06-01 | 奥蒂斯电梯公司 | Elevator load weighing device |
| CA2406896C (en) * | 2000-05-01 | 2010-01-26 | Inventio Ag | Load carrying means for cable elevators with integrated load measuring equipment |
| CN201770377U (en) * | 2010-09-08 | 2011-03-23 | 谢君 | Apparatus for capturing operation information of elevator car |
| CN102062660A (en) * | 2010-12-13 | 2011-05-18 | 天津工程机械研究院 | Device for measuring tension of winch cable and measuring method thereof |
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2012
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4986391A (en) * | 1989-11-30 | 1991-01-22 | Otis Elevator Company | Elevator load weighing |
| CA2406896C (en) * | 2000-05-01 | 2010-01-26 | Inventio Ag | Load carrying means for cable elevators with integrated load measuring equipment |
| CN1622914A (en) * | 2002-02-28 | 2005-06-01 | 奥蒂斯电梯公司 | Elevator load weighing device |
| CN201770377U (en) * | 2010-09-08 | 2011-03-23 | 谢君 | Apparatus for capturing operation information of elevator car |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016123902A1 (en) * | 2015-02-05 | 2016-08-11 | 江苏蒙哥马利电梯有限公司 | Calculating method for maximum decoration weight of lift car |
| CN105540373A (en) * | 2015-12-25 | 2016-05-04 | 辽宁优力安机电设备有限公司 | Elevator load measuring device and method by using magneto rheological fluid brake |
| CN107539857A (en) * | 2017-08-30 | 2018-01-05 | 顺德职业技术学院 | A kind of practice teaching elevator of bistable state sensing |
| CN108382941A (en) * | 2018-03-26 | 2018-08-10 | 日立电梯（中国）有限公司 | Elevator overload detector and elevator overload detection method |
| CN108382941B (en) * | 2018-03-26 | 2020-10-16 | 日立电梯（中国）有限公司 | Elevator overload detection device and elevator overload detection method |
| CN109573759A (en) * | 2018-12-19 | 2019-04-05 | 广州广日电梯工业有限公司 | The extended detection of wirerope and means for correcting and method in running process of elevator |
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| CN102910514B (en) | 2015-03-04 |
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