CN102411158A - Detection method for trolley entering into working region - Google Patents
Detection method for trolley entering into working region Download PDFInfo
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- CN102411158A CN102411158A CN2010102915399A CN201010291539A CN102411158A CN 102411158 A CN102411158 A CN 102411158A CN 2010102915399 A CN2010102915399 A CN 2010102915399A CN 201010291539 A CN201010291539 A CN 201010291539A CN 102411158 A CN102411158 A CN 102411158A
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Abstract
The invention discloses a detection method for a trolley entering into a working region. In the method, a region detection proximity switch, a trolley running direction detector and a PLC (Programmable Logic Controller) or a relaying start-keep-stop circuit are used. An output point of the region detection proximity switch is connected with the output point of the trolley running direction detector in series so as to transmit information to an input end of a PLC trigger or a start-stop switch of the relaying start-keep-stop circuit, and the working region of the trolley is detected according to an input signal of the trigger or the start-keep-stop circuit. In the method, the direction detector is used, so that programming is simple, the relay device is easy to maintain, and based on the flexibility of the region proximity switch, the detection method can be widely used. With the method, a great deal of maintenance time is saved, automatic functions of devices are guaranteed, labor intensity is reduced and labor productivity is improved.
Description
Technical field
The present invention relates to the detection method of dolly in a kind of zone; Particularly come and go the detection method that circulation dolly (or jobbie) got into or withdrawed from a certain appointed area, be suitable for coming and going the train (particularly high ferro train) that moves on dolly, elevator, mechanical arm, the railway, the zone of sealing object place operations such as highway automobile etc.
Background technology
Detecting the method that comes and goes circulation dolly (or jobbie) a certain appointed area of entering or withdraw from a certain appointed area now has the detection of rope sensor definite value, goat's horn travel switch (for example: the LX211-2 type) and near switch lengthening buting iron detect to detect.
Rope sensor is made up of code-disc and line winch; Code-disc and line winch are fixing, and cotton rope in the line winch is fixed on the dolly on the wall, and calculates the length that the line in the outlet winch is drawn out according to the number of turns of code-disc commentaries on classics and the diameter of line winch; It is the distance of trolley travelling; And sending range data to PLC, PLC compares according to data of setting and the data that send PLC to, detects dolly and whether gets into the appointed area or withdraw from the appointed area.This detection mode is very accurate; But cost is than higher, and volume ratio is bigger, and weight is relatively heavy; The detection distance is difficult for long, and winch and stay cord cause physical damage easily, and the easy scratching of stay cord causes error; Data transmission is disturbed easily; Owing to receive the restriction stay cord of winch generally to be no more than 30 meters, it also belongs to indirect measurement dolly position, instability.
The goat's horn travel switch detects; It mainly is used for controlling dolly and gets into the appointed area or withdraw from the signal that PLC is issued in the appointed area, and travel switch is the switch that contact has the contact mechanical action, its heavy, the big clumsiness of volume; So travel switch is broken easily; The contact is prone to aging, and machinery is fragile, and failure rate is high.The travel switch incompatibility is by the equipment of PLC control large-scale continuous production.
Detect near switch lengthening buting iron; It is by forming near the lengthening buting iron on switch and the dolly, and buting iron generally is no more than 2 meters, after dolly gets into the appointed area; Obtain signal near switch; And in buting iron moves limited distance, trigger always, make and issue the PLC signal near switch and do not lose, detect the signal that dolly gets into the appointed area or withdraws from the appointed area near switch; But this detection mode also requires the stability of buting iron, i.e. the stability of trolley travelling, and it is too big that dolly in orbit can not amplitude of fluctuation, otherwise that dolly can drive the buting iron swing is excessive, can make near switching signal and lose; Have only buting iron should with keep certain distance near switch, could guarantee can triggered as normal not lose signal near switch.
Summary of the invention
The object of the present invention is to provide a kind of dolly to get into the detection method in the perform region; Whether get into the perform region through a zone near switch and PLC programming technique detection dolly; To improve the stability of PLC detection signal; The reliability of enhancement apparatus reduces equipment failure rate, enhances productivity.
The objective of the invention is to realize like this, a kind of dolly gets into the detection method in the perform region, is mainly detected by the zone and opens guarantor's power failure road near switch, trolley travelling direction detector and PLC or relay and form; The zone is detected near the output point of the switch input end or the relay of giving the PLC trigger of connect with the output point of trolley travelling direction detector and is opened the start stop switch of protecting the power failure road, goes out the perform region that dolly belongs to according to trigger or the input signal detection that opens guarantor's power failure road.
According to work requirements; The zone can be made into various detection modes, volume little, lightweight detection means (as: optoelectronic switch, electromagnetic induction switch, ultrasonic sensor near switch; The bar code detectors; Magnetic cards etc.), in order to detect the perform region at various mechanical arms place, this technology is programmed simply, is very easily promoted near switch is easy for installation.
The present invention adds the stability height near the switch detection signal owing to the memory source that program takies PLC is considerably less, and it is more reliable that equipment operation is got.Practiced thrift a large amount of maintenance times, guaranteed the automatic function of equipment, reduced labour intensity, raised labour productivity.
Description of drawings
Fig. 1 is dolly operating path operation synoptic diagram of the present invention;
Fig. 2 utilizes PLC signal input point synoptic diagram for the present invention;
Fig. 3 utilizes the programming ladder diagram of set-reset flip-floop among the PLC for the present invention;
Fig. 4 utilizes the programming ladder diagram of rest-set flip-flop among the PLC for the present invention;
Fig. 5 opens the signal input point synoptic diagram of protecting the power failure road for utilization of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
A kind of dolly gets into the detection method in the perform region, is mainly detected by the zone and forms near switch, trolley travelling direction detector and PLC; The zone detection is connected with the output point of trolley travelling direction detector near the output point of switch 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, two kinds of triggers of SR, two ends R, S are 1 o'clock simultaneously, the output of regulation is different.With PLC400 is example, and rest-set flip-flop input two ends are 1 o'clock simultaneously, trigger set Q0.0 set; Set-reset flip-floop input two ends are 1 o'clock simultaneously, trigger set-reset Q0.0 reset; Select the type of trigger according to the actual conditions at scene.
Like Fig. 1,2, shown in 3, a kind of dolly gets into the detection method in the perform region, is mainly detected by the zone and forms near switch, trolley travelling direction detector and PLC; The S end of connecting with the output point of the detected entering region direction of trolley travelling direction detector and giving set-reset flip-floop near the output point of switch is detected in the zone, and the R end of connecting with the detected output point that withdraws from region direction of trolley travelling direction detector and giving set-reset flip-floop near the output point of switch is detected in the zone.
The dolly course of work: dolly left-hand operation (left lateral contactor I0.0 closed " 1 "), when left-hand ran to the zone near switch (I0.4 closed " 1 "), PLC sent dolly and gets into perform region signal (set-reset flip-floop has output Q0.0 set).Can forbid that other equipment get into this zone through interlocking.Dolly perform region scope is that the zone is near switch left-hand to infinity (also can limit through limit switch, promptly dolly perform region scope is that limit on the left arrives near switch).When the zone was arrived in dolly dextrad operation (right lateral contactor I0.1 closed " 1 ") near switch (I0.4 closed " 1 "), PLC sent the not signal (set-reset flip-floop is not exported the Q0.0 reset) in the perform region of dolly.Dolly not in the perform region scope be the zone near switch dextrad to infinity.
Like Fig. 1,2, shown in 4: a kind of dolly gets into the detection method in the perform region, is mainly detected by the zone and forms near switch, trolley travelling direction detector and PLC; The S end of connecting with the output point of the detected entering region direction of trolley travelling direction detector and giving rest-set flip-flop near the output point of switch is detected in the zone, and the R end of connecting with the detected output point that withdraws from region direction of trolley travelling direction detector and giving rest-set flip-flop near the output point of switch is detected in the zone.
The dolly course of work; Dolly left-hand operation (left lateral contactor I0.0 closed " 1 "), when left-hand ran to the zone near switch (I0.4 closed " 1 "), PLC sent dolly and gets into perform region signal (rest-set flip-flop has output Q0.0 set).Can forbid that other equipment get into this zone through interlocking.Dolly perform region scope is that the zone is near switch left-hand to infinity (also can limit through limit switch, promptly dolly perform region scope is that limit on the left arrives near switch).When the zone was arrived in dolly dextrad operation (right lateral contactor I0.1 closed " 1 ") near switch (I0.4 closed " 1 "), PLC sent the not signal (rest-set flip-flop is not exported the Q0.0 reset) in the perform region of dolly.Dolly not in the perform region scope be the zone near switch dextrad to infinity.
Like Fig. 1, shown in 5: a kind of dolly gets into the detection method in the perform region, mainly opens guarantor's power failure road by the zone detection near switch, trolley travelling direction detector and relay and forms; The zone is detected to connect with the output point of the detected entering region direction of trolley travelling direction detector near the output point of switch and is given on the starting switch position that relay opens guarantor's power failure road; The zone is detected connect with the detected output point that withdraws from region direction of trolley travelling direction detector near the output point of switch and is given after the also negate on the shutdown switch position that relay opens guarantor's power failure road.
The dolly course of work; Dolly left-hand operation (left lateral contactor I0.0 closed " 1 ") when left-hand runs to the zone near switch (I0.4 closed " 1 "), through the start loop of Qi Baoting, is sent dolly and is got into perform region signal (Q0.0 has output).Can forbid that other equipment get into this zone through interlocking.Dolly perform region scope is that the zone is near switch left-hand to infinity (also can limit through limit switch, promptly dolly perform region scope is that limit on the left arrives near switch).When the operation of dolly dextrad (right lateral contactor I0.1 closed " 1 "); When dextrad runs to the zone near switch (I0.4 closed " 1 "); Contactor Q0.1 gets; Drive normally closed contact through contactor Q0.1, restart the stop loop of Qi Baoting, send not signal (Q0.0 is output not) of dolly in the perform region.Dolly not in the perform region scope be the zone near switch dextrad to infinity.
The present invention need long buting iron, can block to send signal near switch and get final product; Get into the infinite in length system of appointed area; It directly detects dolly and whether gets into the appointed area; Near switch is electronic non-contact switch, and failure rate and low is so use the stability that can improve detection signal near the switch inspected object.According to work requirements, can use various detection modes, volume little, lightweight detection means (as: optoelectronic switch, electromagnetic induction switch near switch; Ultrasonic sensor, bar code detectors, magnetic card etc.); Reduce false triggering, in order to detect the perform region at various mechanical arms place; This technology programming memory source simple, that take PLC is considerably less, is very easily promoted near switch is easy for installation.
Deployment area improves its superiority near the different test format of switch; As: the object beyond the utilization ultrasonic sensor can detect tens meters, as long as can detect object, it just can detect this object and whether get into the appointed area or withdraw from the appointed area; It can avoid that directly contact is poisonous, high temperature etc. is to people and checkout equipment harm.
Replace the zone to detect with bar code device, can also write down ten hundreds of operational vehicles and get into the perform region near switch, or the zone of deactivating.
The present invention is suitable for coming and going the train (particularly high ferro train) that moves on dolly, elevator, mechanical arm, the railway, the zone of sealing object place operations such as highway automobile.
Come and go dolly, detect dolly and get into a certain appointed area or withdraw from a certain appointed area.
Elevator is installed one at every layer and can be used to detect elevator and belong to the floor actual area now near switch, than code-disc detect directly, do not receive the influence of other conditions and factor; If the situation of facing a danger also can be provided with near the floor exit of slow arrival actual area.Also can bar code be installed in every layer of elevator exit, mounting bar code detectors on the elevator dolly detects the floor actual area that the elevator dolly is arrived.
Install on the mechanical arm button big can detect the real work zone of mechanical arm near switch, in order to the firmly size and the work space of control arm.Can also use and a plurality ofly more accurately detect the actual area at mechanical arm place, in order to the firmly size and the work space of accurate control arm near switch.
Train on the railway all has unique trade mark barcode number aboard with on the compartment, if when detecting the trade mark barcode number and send the zone that is got into, just can find the zone that any one train that will search or compartment belong at any time; So that allotment.If each terminal all is equipped with the bar code regional detection device, just it is perfectly clear to search any zone that the compartment arrived so.
The sealing highway automobile; Getting into inlet from car begins; If whenever can detect the trade mark barcode number while and send the zone that is got into, but, prevent that automobile from coming and going the sport car escape and charging in the zone with regard to the operation area that the complete monitoring automobile belongs at a distance from a segment distance.
Can be used as illustrating of direction detector:
1, controls the duty of the conversing contactor of trolley travelling direction, judge the direction of motion of object.
2, control the solenoid valve signal of hydraulic cylinder traffic direction, judge the direction of motion of object.
Object is judged near the direction of motion (direction detector is installed in the zone near the switch) of object by the power of the vibration wave that far and closely produces during 3, according to object of which movement process check point.
4, detect the object of motion with two switches, send the sequencing of signal, judge near the direction of motion (direction detector is installed in the zone near the switch) of object according to detector switch.
Characteristics of the present invention are to have introduced direction detector, make programming simple, and relay equipment is easy to safeguard; Deployment area flexible and changeable near switch again, the scope of application is extensive.
Claims (4)
1. a dolly gets into the detection method in the perform region, it is characterized in that: mainly detected by the zone and open guarantor's power failure road near switch, trolley travelling direction detector and PLC or relay and form; The zone is detected near the output point of the switch input end or the relay of giving the PLC trigger of connect with the output point of trolley travelling direction detector and is opened the start stop switch of protecting the power failure road, goes out the perform region that dolly belongs to according to trigger or the input signal detection that opens guarantor's power failure road.
2. dolly according to claim 1 gets into the detection method in the perform region; It is characterized in that: described trigger is a set-reset flip-floop; The S end of connecting with the output point of the detected entering region direction of trolley travelling direction detector and giving set-reset flip-floop near the output point of switch is detected in the zone, and the R end of connecting with the detected output point that withdraws from region direction of trolley travelling direction detector and giving set-reset flip-floop near the output point of switch is detected in the zone.
3. dolly according to claim 1 gets into the detection method in the perform region; It is characterized in that: described trigger is a rest-set flip-flop; The S end of connecting with the output point of the detected entering region direction of trolley travelling direction detector and giving rest-set flip-flop near the output point of switch is detected in the zone, and the R end of connecting with the detected output point that withdraws from region direction of trolley travelling direction detector and giving rest-set flip-flop near the output point of switch is detected in the zone.
4. dolly according to claim 1 gets into the detection method in the perform region; It is characterized in that: described relay opens protects the power failure road mode of connection, is that the zone is detected to connect with the output point of the detected entering region direction of trolley travelling direction detector near the output point of switch and given on the starting switch position that relay opens guarantor's power failure road; The zone is detected connect with the detected output point that withdraws from region direction of trolley travelling direction detector near the output point of switch and is given after the also negate on the shutdown switch position that relay opens guarantor's power failure road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010291539.9A CN102411158B (en) | 2010-09-21 | 2010-09-21 | Detection method for trolley entering into working region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010291539.9A CN102411158B (en) | 2010-09-21 | 2010-09-21 | Detection method for trolley entering into working region |
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| Publication Number | Publication Date |
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| CN102411158A true CN102411158A (en) | 2012-04-11 |
| CN102411158B CN102411158B (en) | 2014-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010291539.9A Active CN102411158B (en) | 2010-09-21 | 2010-09-21 | Detection method for trolley entering into working region |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331141A (en) * | 2017-07-28 | 2017-11-07 | 王铁刚 | A kind of portable transducing signal region limits wireless receiving and display system |
Citations (6)
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| CN1199015A (en) * | 1997-04-24 | 1998-11-18 | Lg产电株式会社 | Car information indicating apparatus |
| JP2000211514A (en) * | 1999-01-21 | 2000-08-02 | West Japan Railway Co | Train stop detecting device |
| JP2002178922A (en) * | 2000-12-15 | 2002-06-26 | East Japan Railway Co | Single track automatic block system |
| JP2003054864A (en) * | 2001-08-14 | 2003-02-26 | Hitachi Ltd | Control device of passenger conveyer |
| JP2005126240A (en) * | 2003-10-20 | 2005-05-19 | Inventio Ag | Safety system for elevator installation and method of operating elevator installation with safety system |
| 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 |
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2010
- 2010-09-21 CN CN201010291539.9A patent/CN102411158B/en active Active
Patent Citations (7)
| 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 |
| JP2000211514A (en) * | 1999-01-21 | 2000-08-02 | West Japan Railway Co | Train stop detecting device |
| JP2002178922A (en) * | 2000-12-15 | 2002-06-26 | East Japan Railway Co | Single track automatic block system |
| JP2003054864A (en) * | 2001-08-14 | 2003-02-26 | Hitachi Ltd | Control device of passenger conveyer |
| JP2005126240A (en) * | 2003-10-20 | 2005-05-19 | Inventio Ag | Safety system for elevator installation and method of operating elevator installation with safety system |
| 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 (2)
| Title |
|---|
| 岳浩东等: "基于PLC的行车控制系统设计", 《中国仪器仪表》, no. 03, 25 March 2006 (2006-03-25), pages 72 - 74 * |
| 朱莹辉: "浅谈启保停电路在PLC程序中的应用", 《数字技术与应用》, no. 08, 31 August 2010 (2010-08-31), pages 4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107331141A (en) * | 2017-07-28 | 2017-11-07 | 王铁刚 | A kind of portable transducing signal region limits wireless receiving and display system |
| CN107331141B (en) * | 2017-07-28 | 2023-04-07 | 王铁刚 | Mobile sensing signal area limiting wireless receiving and displaying system |
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| Publication number | Publication date |
|---|---|
| CN102411158B (en) | 2014-12-31 |
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