CN102411158B - Method for detecting trolley entering working area - Google Patents
Method for detecting trolley entering working area Download PDFInfo
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- CN102411158B CN102411158B CN201010291539.9A CN201010291539A CN102411158B CN 102411158 B CN102411158 B CN 102411158B CN 201010291539 A CN201010291539 A CN 201010291539A CN 102411158 B CN102411158 B CN 102411158B
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- region
- proximity switch
- output point
- dolly
- direction detector
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- 238000000034 method Methods 0.000 title abstract description 4
- 238000001514 detection method Methods 0.000 claims abstract description 55
- 238000012423 maintenance Methods 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 18
- 229910052742 iron Inorganic materials 0.000 description 9
- 230000033001 locomotion Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 3
- 241000883966 Astrophytum capricorne Species 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 206010009696 Clumsiness Diseases 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Landscapes
- Control Of Position, Course, Altitude, Or Attitude Of Moving Bodies (AREA)
Abstract
The invention discloses a method for detecting whether a trolley enters a working area, which mainly comprises an area detection proximity switch, a trolley running direction detector and a PLC (programmable logic controller) or relay start-stop circuit; the output point of the area detection proximity switch and the output point of the trolley running direction detector are connected in series and are sent to the input end of the PLC trigger or the start-stop switch of the relay start-stop circuit, and the working area where the trolley is located is detected according to the input signal of the trigger or the start-stop circuit. The invention introduces the direction detector, so that the programming is simple, the relay equipment is easy to maintain, the flexibility and the changeability of the regional proximity switch are further applied, and the application range is wide. The invention saves a large amount of maintenance time, ensures the automatic function of the equipment, reduces the labor intensity and improves the labor productivity.
Description
Technical field
The present invention relates to the detection method of dolly in a kind of region, particularly cyclic dolly (or jobbie) enters or exits the detection method of a certain appointed area, is suitable for the train (particularly high ferro train) that round dolly, elevator, mechanical arm, railway run, the region etc. closing the object place operations such as highway automobile.
Background technology
The method that present detection cyclic dolly (or jobbie) enters a certain appointed area or exits a certain appointed area has rope sensor setting examination, goat's horn travel switch to detect (such as: LX211-2 type) and proximity switch lengthens buting iron detection.
Rope sensor is made up of code-disc and line winch, code-disc and line winch are fixed on the wall, cotton rope in line winch is fixed on dolly, and the diameter of the number of turns turned according to code-disc and line winch calculates the length that the line in outlet winch is drawn out, the i.e. distance of trolley travelling, and range data is sent to PLC, PLC compares according to the data of setting and the data sending PLC to, detects whether dolly enters appointed area or exit appointed area.This detection mode is very accurate; But cost is higher, volume ratio is larger, weight compares heavier, detecting distance is not easily long, and winch and stay cord easily cause physical damage, and the easy scratching of stay cord causes error, data transmission is easily disturbed, because the restriction stay cord by winch is generally no more than 30 meters, it also belongs to the little truck position of indirect inspection, unstable.
Goat's horn travel switch detects, it is mainly used to control dolly and enters appointed area or exit the signal that PLC is issued in appointed area, travel switch is the switch that contact has contact mechanical action, the large clumsiness of its heavy, volume, so travel switch is easily damaged, contact is easily aging, and machinery is fragile, and failure rate is high.Travel switch is not suitable with the equipment being controlled large-scale continuous production by PLC.
Proximity switch lengthens buting iron and detects, it is made up of the lengthening buting iron on proximity switch and dolly, buting iron is generally no more than 2 meters, after dolly enters appointed area, proximity switch obtains signal, and move in limited distance at buting iron and trigger proximity switch always, make proximity switch issue PLC signal and do not lose, detect dolly and enter appointed area or exit the signal of appointed area; But this detection mode also requires the stability of buting iron, i.e. the stability of trolley travelling, dolly in orbit can not amplitude of fluctuation too large, otherwise dolly that buting iron can be driven to swing is excessive, proximity switch dropout can be made; Only have buting iron should maintain a certain distance with proximity switch, guarantee proximity switch triggered as normal can not lose signal.
Summary of the invention
A kind of dolly is the object of the present invention is to provide to enter detection method in perform region, detect dolly by a region proximity switch and PLC programming technique and whether enter perform region, to improve the stability of PLC detection signal, the reliability of enhancing equipment, reduce equipment failure rate, enhance productivity.
The object of the present invention is achieved like this, and a kind of dolly enters the detection method in perform region, opens protect power failure road composition primarily of region detection proximity switch, trolley travelling direction detector and PLC or relay; Connect with the output point of the trolley travelling direction detector input end of giving PLC trigger or relay of the output point of region detection proximity switch opens the start stop switch protecting power failure road, according to trigger or open the perform region that the input signal detection of protecting power failure road goes out dolly place.
According to work requirements, region proximity switch can be made into various detection mode, little, the lightweight detection means (as: optoelectronic switch of volume, electromagnetic induction switch, ultrasonic sensor, bar code detector, magnetic card etc.), in order to detect the perform region at various mechanical arm place, the programming of this technology is simple, proximity switch is easy for installation is very easily promoted.
The memory source that the present invention takies PLC due to program is considerably less, and the stability of adding proximity switch detection signal is high, equipment is run more reliable.Save a large amount of maintenance times, ensured the automatic function of equipment, reduced labour intensity, raise labour productivity.
Accompanying drawing explanation
Fig. 1 is that dolly operating path of the present invention runs schematic diagram;
Fig. 2 is that the present invention utilizes PLC signal input point schematic diagram;
Fig. 3 is the programming ladder diagram that the present invention utilizes set-reset flip-floop in PLC;
Fig. 4 is the programming ladder diagram that the present invention utilizes rest-set flip-flop in PLC;
Fig. 5 is that the present invention utilizes the signal input point schematic diagram opening and protect power failure road.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Dolly enters the detection method in perform region, forms primarily of region detection proximity switch, trolley travelling direction detector and PLC; The output point of region detection proximity switch is connected with the output point of trolley travelling direction detector and is given the input end of PLC trigger, goes out the perform region at dolly place according to the input signal detection of trigger.
The PLC instruction of different brands, to RS, SR two kinds of triggers, when two ends R, S are 1 simultaneously, the output of regulation is different.For PLC400, when rest-set flip-flop input two ends are 1 simultaneously, trigger set Q0.0 set; When set-reset flip-floop input two ends are 1 simultaneously, trigger set-reset Q0.0 reset; .The type of trigger is selected according to the actual conditions at scene.
As shown in Figure 1, 2, 3, a kind of dolly enters the detection method in perform region, forms primarily of region detection proximity switch, trolley travelling direction detector and PLC; The output point entering region direction that output point and the trolley travelling direction detector of region detection proximity switch the detect S giving set-reset flip-floop that connects holds, and the output point exiting region direction that output point and the trolley travelling direction detector of region detection proximity switch the detect R giving set-reset flip-floop that connects holds.
The dolly course of work: dolly left-hand runs (left lateral contactor I0.0 closes " 1 "), when left-hand runs to region proximity switch (I0.4 closes " 1 "), PLC sends dolly and enters perform region signal (set-reset flip-floop has output Q0.0 set).Forbid that other equipment enter this region by interlocking.Dolly perform region scope is that region proximity switch left-hand is to infinity (also can be limited by limit switch, namely dolly perform region scope is that limit on the left arrives proximity switch).When dolly dextrad runs (right lateral contactor I0.1 closes " 1 ") to region proximity switch (I0.4 closes " 1 "), PLC sends dolly not perform region signal (set-reset flip-floop does not export Q0.0 reset).Dolly is not that region proximity switch dextrad is to infinity in perform region scope.
As shown in Fig. 1,2,4: a kind of dolly enters the detection method in perform region, form primarily of region detection proximity switch, trolley travelling direction detector and PLC; The output point entering region direction that output point and the trolley travelling direction detector of region detection proximity switch the detect S giving rest-set flip-flop that connects holds, and the output point exiting region direction that output point and the trolley travelling direction detector of region detection proximity switch the detect R giving rest-set flip-flop that connects holds.
The dolly course of work; Dolly left-hand runs (left lateral contactor I0.0 closes " 1 "), when left-hand runs to region proximity switch (I0.4 closes " 1 "), PLC sends dolly and enters perform region signal (rest-set flip-flop has output Q0.0 set).Forbid that other equipment enter this region by interlocking.Dolly perform region scope is that region proximity switch left-hand is to infinity (also can be limited by limit switch, namely dolly perform region scope is that limit on the left arrives proximity switch).When dolly dextrad runs (right lateral contactor I0.1 closes " 1 ") to region proximity switch (I0.4 closes " 1 "), PLC sends dolly not perform region signal (rest-set flip-flop does not export Q0.0 reset).Dolly is not that region proximity switch dextrad is to infinity in perform region scope.
As shown in Figure 1,5: a kind of dolly enters the detection method in perform region, guarantor power failure road composition is opened primarily of region detection proximity switch, trolley travelling direction detector and relay; The output point entering region direction that output point and the trolley travelling direction detector of region detection proximity switch detect is connected and is given relay and open and protect on the starting switch position on power failure road; The output point exiting region direction that output point and the trolley travelling direction detector of region detection proximity switch detect is connected and is given relay after negate and opens and protect on the shutdown switch position on power failure road.
The dolly course of work; Dolly left-hand runs (left lateral contactor I0.0 closes " 1 "), when left-hand runs to region proximity switch (I0.4 closes " 1 "), by the start loop of Qi Baoting, send dolly and enter perform region signal (Q0.0 has output).Forbid that other equipment enter this region by interlocking.Dolly perform region scope is that region proximity switch left-hand is to infinity (also can be limited by limit switch, namely dolly perform region scope is that limit on the left arrives proximity switch).When dolly dextrad runs (right lateral contactor I0.1 closes " 1 "), when dextrad runs to region proximity switch (I0.4 closes " 1 "), contactor Q0.1 obtains electric, normally closed contact is driven by contactor Q0.1, restart the stop loop of Qi Baoting, send dolly not perform region signal (Q0.0 does not export).Dolly is not that region proximity switch dextrad is to infinity in perform region scope.
The present invention does not need long buting iron, can block proximity switch and send signal; Enter the infinite in length system of appointed area; Whether its direct-detection dolly enters appointed area; Proximity switch is electronic non-contact switch, failure rate and low, so can improve the stability of detection signal by proximity switch inspected object.According to work requirements, proximity switch can with various detection mode, volume little, lightweight detection means (as: optoelectronic switch, electromagnetic induction switch, ultrasonic sensor, bar code detector, magnetic card etc.), reduce false triggering, in order to detect the perform region at various mechanical arm place; This technology programming memory source that is simple, that take PLC is considerably less, and proximity switch is easy for installation very easily to be promoted.
The different test format of deployment area proximity switch improve its superiority; As: utilization ultrasonic sensor can detect the object beyond tens meters, as long as can object be detected, it just can detect whether this object enters appointed area or exit appointed area; It can avoid that directly contact is poisonous, high temperature etc. is to people and checkout equipment harm.
Replace region proximity switch to detect with bar code device, ten hundreds of operational vehicles can also be recorded and enter perform region, or region of deactivating.
The present invention is suitable for the train (particularly high ferro train) that round dolly, elevator, mechanical arm, railway run, the region closing the object place operations such as highway automobile.
Come and go dolly, detect dolly and enter a certain appointed area or exit a certain appointed area.
Elevator installs a proximity switch at every layer, may be used for elevator present place floor actual area being detected, than code-disc detect direct, not by the impact of other conditions and factor; If the situation of facing a danger, the floor exit slowly arrived near actual area also can be set.Also in every layer of elevator exit, bar code can be installed, mounting bar code detectors on elevator dolly, detect the floor actual area that elevator dolly arrives.
Mechanical arm is installed the real work region that the large proximity switch of button can detect mechanical arm, in order to control firmly size and the work space of arm.Can also by the actual area at the more accurate inspecting manipuator place of multiple proximity switch, in order to accurately to control firmly size and the work space of arm.
Train on railway, has unique trade mark barcode number aboard with on compartment, if send entered region while the detection trade mark barcode number, just can find the region at any one train or the place, compartment that will search at any time; To allocate.If each terminal is provided with bar code regional detection device, it is just perfectly clear so to search the region that any compartment arrives.
Close highway automobile, enter entrance starts from car, if can detect that trade mark barcode number is simultaneously and send entered region every a segment distance, just can the operation area at complete monitoring automobile place, prevent automobile from region, coming and going sport car and escape and charge.
Can be used as illustrating of direction detector:
1, control the duty of the conversing contactor in trolley travelling direction, judge the direction of motion of object.
2, the solenoid valve signal of hydraulic control cylinder traffic direction, judges the direction of motion of object.
3, according to object of which movement through the power of check point object by the vibration wave far and closely produced, judge the direction of motion (direction detector is arranged near the proximity switch of region) of object.
4, detect the object of motion with two switches, send the sequencing of signal according to detector switch, judge the direction of motion (direction detector is arranged near the proximity switch of region) of object.
Feature of the present invention is to have introduced direction detector, makes programming simple, and relay equipment is easy to safeguard; Deployment area proximity switch is flexible and changeable, applied widely again.
Claims (3)
1. dolly enters the detection method in perform region, it is characterized in that: form primarily of region detection proximity switch, trolley travelling direction detector and PLC; The connect S of the set-reset flip-floop giving PLC of the output point entering region direction that output point and the trolley travelling direction detector of region detection proximity switch detect holds, the connect R of the set-reset flip-floop giving PLC of the output point exiting region direction that output point and the trolley travelling direction detector of region detection proximity switch detect holds, and goes out the perform region at dolly place according to the input signal detection of trigger.
2. dolly enters the detection method in perform region, it is characterized in that: form primarily of region detection proximity switch, trolley travelling direction detector and PLC; The connect S of the rest-set flip-flop giving PLC of the output point entering region direction that output point and the trolley travelling direction detector of region detection proximity switch detect holds, the connect R of the rest-set flip-flop giving PLC of the output point exiting region direction that output point and the trolley travelling direction detector of region detection proximity switch detect holds, and goes out the perform region at dolly place according to the input signal detection of trigger.
3. dolly enters the detection method in perform region, it is characterized in that: open primarily of region detection proximity switch, trolley travelling direction detector and relay and protect power failure road composition; The output point entering region direction that output point and the trolley travelling direction detector of region detection proximity switch detect is connected and is given relay and open and protect on the starting switch position on power failure road; The output point exiting region direction that output point and the trolley travelling direction detector of region detection proximity switch detect is connected gained signal give relay after negate and open and protect on the shutdown switch position on power failure road, according to the perform region of opening the input signal detection of protecting power failure road and go out dolly place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010291539.9A CN102411158B (en) | 2010-09-21 | 2010-09-21 | Method for detecting trolley entering working area |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010291539.9A CN102411158B (en) | 2010-09-21 | 2010-09-21 | Method for detecting trolley entering working area |
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| CN102411158A CN102411158A (en) | 2012-04-11 |
| CN102411158B true CN102411158B (en) | 2014-12-31 |
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| CN201010291539.9A Active CN102411158B (en) | 2010-09-21 | 2010-09-21 | Method for detecting trolley entering working area |
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| CN107331141B (en) * | 2017-07-28 | 2023-04-07 | 王铁刚 | Mobile sensing signal area limiting wireless receiving and displaying system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199015A (en) * | 1997-04-24 | 1998-11-18 | Lg产电株式会社 | Car information indicating apparatus |
| CN101264843A (en) * | 2008-03-05 | 2008-09-17 | 上海中业电梯有限公司 | Escalator operation safety monitoring method and device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4193010B2 (en) * | 1999-01-21 | 2008-12-10 | 西日本旅客鉄道株式会社 | Train stop detection device |
| JP4721508B2 (en) * | 2000-12-15 | 2011-07-13 | 東日本旅客鉄道株式会社 | Single wire automatic closure system |
| JP3950652B2 (en) * | 2001-08-14 | 2007-08-01 | 株式会社日立製作所 | Passenger conveyor control device |
| US7353914B2 (en) * | 2003-10-20 | 2008-04-08 | Inventio Ag | Safety system for an elevator |
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2010
- 2010-09-21 CN CN201010291539.9A patent/CN102411158B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1199015A (en) * | 1997-04-24 | 1998-11-18 | Lg产电株式会社 | Car information indicating apparatus |
| US6021870A (en) * | 1997-04-24 | 2000-02-08 | Lg Industrial Systems Co., Ltd. | Car information indicating apparatus |
| CN101264843A (en) * | 2008-03-05 | 2008-09-17 | 上海中业电梯有限公司 | Escalator operation safety monitoring method and device |
Non-Patent Citations (6)
| Title |
|---|
| JP特开2000-211514A 2000.08.02 * |
| JP特开2002-178922A 2002.06.26 * |
| JP特开2003-54864A 2003.02.26 * |
| JP特开2005-126240A 2005.05.19 * |
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| CN102411158A (en) | 2012-04-11 |
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