CN105785966B - Switching value limit detection device - Google Patents
Switching value limit detection device Download PDFInfo
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- CN105785966B CN105785966B CN201410813076.6A CN201410813076A CN105785966B CN 105785966 B CN105785966 B CN 105785966B CN 201410813076 A CN201410813076 A CN 201410813076A CN 105785966 B CN105785966 B CN 105785966B
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- relay
- power cord
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- sensing element
- switching value
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Abstract
The present invention provides a kind of switching value limit detection device.The switching value limit detection device of the present invention, including induction end, control terminal and output end, it is characterized in that：The induction end includes at least two independent sensing elements；After the control terminal is used to receive the signal that each sensing element transmits in induction end, by the corresponding open and close signal of electric logic circuit output；The output end is used for the access of working power, and fault-signal, limit opened point and the output for limiting normally closed signal, are the interface points of switching value limit detection device and external electrical control device.The configuration of the present invention is simple, easy to operate, cost is relatively low, and the reliably working and fault self-checking of switching value limit may be implemented.
Description
Technical field：
The present invention relates to a kind of switching value limit detection devices, belong to technical field of electric control.
Background technology：
Switching value limit switch is widely used in industrial control field, plays the role of detecting target object location, generally
Including sensing device, electrical control gear and signal output apparatus, and these three parts often carry out integrated sealing.Induction
The position of the induction targets object such as device application hall principle or magnetic principle, the letter that electrical control gear senses sensing device
It number is amplified or converts, and signal output apparatus exports the signal that electrical control gear generates.Single is opened
Pass amount limit, when detecting target object location, can only export normally opened or normally closed on-off model, due to integrated sealing
Mode, sensing device, electrical control gear are identical with the working environment residing for signal output apparatus, to the higher list of environmental requirement
Member is susceptible to failure at first.Once sensing device or electrical control gear break down, may result in signal false triggering or
It does not trigger, for important chain limit and protection limit, industrial accident will be led to by the above problem occur.And it is current
The limit of monomer switching value the failure of itself can not be differentiated at all, go to search point by artificial only after failure appearance
The limit broken down is analysed, it is extremely disadvantageous for production safety and plant maintenance.
Invention content
The purpose of the present invention is providing a kind of switching value limit detection device in view of the above problems, simple in structure,
It is easy to operate, cost is relatively low, may be implemented switching value limit reliably working and fault self-checking.
Above-mentioned purpose is achieved through the following technical solutions：
Switching value limit detection device, including induction end, control terminal and output end, the induction end include at least two
Independent sensing element；After the control terminal is used to receive the signal that each sensing element transmits in induction end, by electrical
Logic circuit exports corresponding open and close signal；The output end is used for the access of working power, fault-signal, limit
The output of normally closed signal of opened point and limit, is the interface point of switching value limit detection device and external electrical control device.
The switching value limit detection device, control terminal outside, which has, sets and displays panel, and described sets
The time-delay relay KT for setting and there is the triggering deviation time for sensing element to be arranged on display panel；For to fault-signal
The reset button for being resetted and being confirmed；It is used to indicate the indicator light of working condition.
The switching value limit detection device, the electric logic circuit include 5 branch being connect with power circuit
Road, wherein No. 1 branch includes the sensing element SQ1 being connect with power cord L, after the coil of relay KA1 and indicator light HL1 parallel connections
One end is connected with sensing element SQ1, and the other end connects power cord N；No. 2 branches include the sensing element SQ2 being connect with power cord L,
One end is connected with sensing element SQ2 after the coil of relay KA2 and indicator light HL2 parallel connections, and the other end connects power cord N；No. 3 branches
For the opened point of relay KA1 and the normally closed point series connection of relay KA2, the normally closed point of relay KA1 and relay KA2's is normally opened
Point series connection, one end connects power cord L, the coil of other end series connection time relay KT, time after this two series circuit parallel connections
The coil other end of relay KT connects power cord N；No. 4 branches include the failure reset button SB being connect with power cord L, the time after
It connects with failure reset button SB after the opened point parallel connection of the timing closing switch and relay KA3 of electric appliance KT, relay KA3's
It connects with previous stage after coil and fault alarm indicator light HL3 parallel connections, the other end connects power cord N；No. 5 branches are relay KA1
Opened point connect power cord L, connect with the opened point of relay KA2, the coil of relay KA4 and limits work light
It connects with previous stage after HL4 parallel connections, the other end connects power cord N.
Description of the drawings
Fig. 1 is switching value limit detection device structure chart.
Fig. 2 is switching value limit detection device control terminal logic circuit schematic diagram.
1# sensing elements in SQ1- induction end；2# sensing elements in SQ2- induction end；KA1-1# sensing elements after
Electric appliance；The relay of KA2-2# sensing elements；KT- deviation time relays；KA3- power transfer relays；KA4- trigger relays；
SB- failure reset buttons；The work instruction of HL1-1# sensing elements；The work instruction of HL2-2# sensing elements；HL3- fault alarms refer to
Show；HL4- limits work instruction.Wherein fault alarm of the relay normally open and normally closed switch KA3 on figure the right for limit, after
For electric appliance normal open switch KA4 for limiting the output of opened point signal, relay normally closed switch KA4 is defeated for limiting normally closed signal
Go out.
Fig. 3 is limit work and self-test flow chart.
Specific implementation mode
As shown in Figure 1, the switching value limit detection device of the present invention, including three induction end, control terminal and output end masters
It includes the output processing of the breakdown judge and signal of limit to want part, detection method.Induction end contains multiple sensing elements, in mesh
After mark limit reaches induction end induction region, each sensing element can independently carry out action triggers, and trigger signal is sent into control
End is handled.
It is corresponding by electric logic circuit output after control terminal receives the signal that each sensing element transmits in induction end
Open and close signal.Since induction end is mounted on working site, environment rather harsh, therefore failure rate can also be got higher, and be
This, control terminal will be monitored the state of induction end, find the failure of induction end in time, carry out the subsequent processes of signal.
In the case that multiple sensing elements work together, all trigger signals should be triggered and be discharged simultaneously, once some induction member
Part breaks down, and the feature showed is exactly that cannot be triggered and discharge simultaneously with other sensing elements, and at this moment control terminal is to sense
Answer element signal carry out logic analysis, judge whether induction end breaks down, if break down if exportable police instruction and
Coordinated Control Signal.Since there are small on the triggered time of detection object location status for multiple sensing elements in induction end
Deviation sensing element triggered time deviation setting is equipped in the logic circuit of control terminal to ensure the reliability of position detection
Device avoids fault-signal false triggering for setting the deviation on the different sensing element triggered times.Control terminal carries succinct
Working condition is arranged and instruction interface, can carry out sensing element triggering deviation time setting and reset failure, can also indicate that sense
The working condition of each sensing element, the self-test situation of limit and working condition should be held.
Output end is used for the access of working power, and fault-signal, limit opened point and the output for limiting normally closed signal are
The interface point of switching value limit detection device and external electrical control device.
The specific course of work：
By taking induction end includes two sensing elements SQ1 and SQ2 as an example, see that Fig. 1, SQ1 and SQ2 can answer object with feeling of independence
The position of body, together due to two sensing element close installations, the node of triggering and release are almost the same.Induction end
Around target object, and control terminal is connected by wiring with induction end, be may be located remotely from induction end and is avoided severe scene
Environment.Panel is set and displayed outside control terminal, wherein time-delay relay KT is used to be arranged touching for sensing element SQ1 and SQ2
Deviation time is sent out, fault-signal false triggering is avoided, for the occasion of stable conditions, as long as carrying out primary school in the equipment debugging stage
It tests；Reset button is for being resetted and being confirmed to fault-signal；Indicator light HL1 is used to indicate the work of sensing element SQ1
Make state, when SQ1 is triggered, indicator light HL1 is lighted；Indicator light HL2 is used to indicate the working condition of sensing element SQ2, when
When SQ2 is triggered, indicator light HL2 is lighted；Indicating fault of the indicator light HL3 for limit；Work of the indicator light HL4 for limit
State instruction, when induction end is correctly triggered, the indicator light lights.Terminals include the input terminal of working power, failure letter
Number, the outlet terminal of limit opened point and the normally closed point of limit, the state that this limit is provided for outwardly electric control system believes
Number and working signal.
The logic circuit principle of control terminal is shown in Fig. 2,
No. 1 branch of circuit diagram, after the coil of sensing element SQ1 connections power cord L, relay KA1 and indicator light HL1 parallel connections
One end is connected with sensing element SQ1, and the other end connects power cord N；
No. 2 branches of circuit diagram, after the coil of sensing element SQ2 connections power cord L, relay KA2 and indicator light HL2 parallel connections
One end is connected with sensing element SQ2, and the other end connects power cord N；
No. 3 branches of circuit diagram, the opened point of relay KA1 and the normally closed point series connection of relay KA2, relay KA1's is normal
Close point and the series connection of the opened point of relay KA2, then two branches progress are in parallel, and one end connects power cord L, the other end after parallel connection
The coil of series connection time relay KT, the coil other end of time relay KT connect power cord N；
No. 4 branches of circuit diagram, the SB connections of failure reset button power cord L, time relay KT timing closing switch and
It connects with failure reset button SB after the opened point parallel connection of relay KA3, the coil and fault alarm indicator light of relay KA3
It connects with previous stage after HL3 parallel connections, the other end connects power cord N, at this moment the opened point of relay KA3 or normally closed point（Outside line map）
It can be used for carrying out the output of fault-signal；
The opened point of No. 5 branches of circuit diagram, relay KA1 connects power cord L, connects with the opened point of relay KA2, after
It connects with previous stage after the coil of electric appliance KA4 and limit work light HL4 parallel connections, the other end connects power cord N, at this moment relay
The opened point of KA4 or normally closed point（Outside line map）It can be used for being detected the output of signal.
SQ1 and SQ2 will be triggered and discharge simultaneously in the case of sensing element normal non-fault, in the process of triggering
In, relay KA1 and KA2 coil obtains electric actuation, status indicator lamp HL1 and HL2 respectively electric carry out state instruction（See No. 1 branch
Road and No. 2 branches）, at this moment relay KA1 and KA2 normal open switch closure, make limit trigger relay coil KA4 obtain electric actuation,
Limit work light HL4 obtains electric carry out state instruction（See No. 5 branches）, at this moment the normally opened contact KA4 of terminals will be closed, often
Closed contact KA4 will be switched off, and can be used for target location detection signal output.
In the case where sensing element SQ1 and SQ2 break down, independently due to SQ1 and SQ2, it is only had
In one first break down, in the case where there is false sense and should trigger failure in SQ1, the at this moment triggering of sensing element and release process
Not in synchronization, when extraneous trigger condition is unsatisfactory for, only relay KA1 coils obtain electric actuation, status indicator lamp HL1 obtain it is electric into
Row state instruction（See No. 1 branch of Fig. 2 circuit diagrams）, relay KA2 coil blackouts disconnect, and status indicator lamp HL2 do not work（See Fig. 2
No. 1 branch of circuit diagram）, the different conditions of KA1 and KA2 cause the time-delay relay KT coils of No. 3 branch roads that must establish beginning timing by cable
The triggering deviation time of SQ1 and SQ2 (setting time be not less than), reaches after setting time that delay closed contact KT is attracted in branch 4,
Malfunction indicator lamp HL3 obtain it is electric light, simultaneous faults relay KA3 coils obtain electric, and carry out self-insurance until reset button to branch
SB is pressed（See No. 4 branches）, at this moment the fault contact KA3 of terminals will start to act, export fault-signal outward for connecting
Lock and protection control, limit are in and do not trigger alarm condition.When extraneous trigger condition meets, since SQ1 and SQ2 are both turned on,
Relay KA1 and KA2 coil obtains electric actuation, status indicator lamp HL1 and HL2 respectively electric carry out state instruction, at this moment relay
KA1 and KA2 normal open switch is closed, and limit trigger relay coil KA4 is made to obtain electric actuation, limit work light HL4 obtain it is electric into
Row state instruction（See No. 5 branches）, at this moment the normally opened contact KA4 of terminals will be closed, normally-closed contact KA4 will be switched off, Ke Yizheng
It is usually used in target location detection signal output.
In the case where SQ1 appearance does not incude triggering failure, when trigger condition is unsatisfactory for, SQ1 and SQ2 cannot be led
Lead to No. 1 branch and No. 2 branches, alarm lamp do not work, limit is in non-triggering state, and limit is working properly.And trigger condition
When meeting, SQ1 is because failure cannot be closed, and the relay KA1 coils of No. 1 branch cannot obtain electric actuation, and SQ2 normally closeds, and 2
The relay KA2 coils of number branch obtain electric actuation, since the contact of relay KA1 and KA2 are in different states, lead to No. 3 branch
The time-delay relay KT coils on road must establish beginning timing (setting time is not less than the triggering deviation time of SQ1 and SQ2) by cable, reach
The closed contact KT of being delayed in branch 4 after setting time is attracted, malfunction indicator lamp HL3 obtain it is electric light, simultaneous faults relay KA3 coils
Must be electric, and self-insurance is carried out until reset button SB is pressed to branch, at this moment the fault contact KA3 of terminals will start to act,
Output fault-signal is for chain and protection control outward.Relay contact KA1 failures in No. 5 branches disconnect, and cause to trigger
Relay KA4 cannot obtain electric actuation, and limit is in and does not trigger alarm condition.
Limit induction end uses two sensing elements of SQ1 and SQ2, the two sensing elements that can play mutually in the present invention
The effect of self-test when being debugged after mounting, triggers according to SQ1 and SQ2 and the time deviation of release is set in control terminal
The time of good deviation time relay KT, avoid fault-signal false triggering.Induction end is mounted on target location nearby for incuding
Its position, and control terminal and terminals can be placed in reduction environment in the preferable environment of environment and be damaged caused by it.Due to
SQ1 and SQ2 installations at the scene, while being sensitive electronic component, and the probability of damage is larger, but due to being independent element, because
This only will appear the case where single failure under normal circumstances.It can be seen that if the output of limit detection device Unprotected left main trunk is believed in use
Number when, even if limit induction end have part sensing element failure, limit can still work normally, once limit detection device produce
When raw alarm failure output signal, limit is stopped, and cannot be triggered, and no longer carries out the transmission of object space detection signal,
Output alarm signal carries out next step electic protection, limits work and self-test flow as shown in Figure 3.
Claims (2)
1. a kind of switching value limit detection device, including induction end, control terminal and output end, it is characterized in that：The induction end
Including at least two independent sensing elements；The control terminal is for receiving the signal that each sensing element transmits in induction end
Afterwards, by the corresponding open and close signal of electric logic circuit output；The output end is used for the access of working power, therefore
Hinder signal, limit opened point and the output for limiting normally closed signal, is that switching value limit detection device is filled with external electrical control
The interface point set；
The electric logic circuit includes 5 branches being connect with power circuit, wherein No. 1 branch includes connecting with power cord L
One end is connected with sensing element SQ1 after the coil of the sensing element SQ1 connect, relay KA1 and indicator light HL1 parallel connections, the other end
Even power cord N；No. 2 branches include the sensing element SQ2 being connect with power cord L, and the coil and indicator light HL2 of relay KA2 are simultaneously
One end is connected with sensing element SQ2 after connection, and the other end connects power cord N；The opened point and relay that No. 3 branches are relay KA1
The normally closed point of KA2 is connected, the opened point series connection of the normally closed point and relay KA2 of relay KA1, after this two series circuit parallel connections
One end connects power cord L, the coil of other end series connection time relay KT, and the coil other end of time relay KT connects power cord
N；No. 4 branches include the timing closing switch and relay of the failure reset button SB, time relay KT that are connect with power cord L
It connects with failure reset button SB after the opened point parallel connection of KA3, the coil and fault alarm indicator light HL3 of relay KA3 is in parallel
It is gone here and there with failure reset button SB after in parallel with the timing closing switch of the time relay KT and the opened point of relay KA3 afterwards
The circuit series connection of connection composition, the other end connect power cord N；The opened point that No. 5 branches are relay KA1 connects power cord L, with relay
The opened point of device KA2 is connected, normal with the relay KA1 after the coil of relay KA4 and limit work light HL4 parallel connections
It prescribes the circuit being composed in series with the opened point of relay KA2 after connection power cord L to connect, the other end connects power cord N.
2. switching value limit detection device according to claim 1, it is characterized in that：There is setting outside the control terminal
And display panel, described seing and displaying have the delay relay of the triggering deviation time for sensing element to be arranged on panel
Device KT；Reset button for being resetted and being confirmed to fault-signal；It is used to indicate the indicator light of working condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813076.6A CN105785966B (en) | 2014-12-24 | 2014-12-24 | Switching value limit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410813076.6A CN105785966B (en) | 2014-12-24 | 2014-12-24 | Switching value limit detection device |
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| Publication Number | Publication Date |
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| CN105785966A CN105785966A (en) | 2016-07-20 |
| CN105785966B true CN105785966B (en) | 2018-08-21 |
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| CN201410813076.6A Active CN105785966B (en) | 2014-12-24 | 2014-12-24 | Switching value limit detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109541343B (en) * | 2018-11-16 | 2021-02-09 | 陕西千山航空电子有限责任公司 | Self-detection method of discrete magnitude output interface |
| CN116088487B (en) * | 2023-04-11 | 2023-07-11 | 湖南长长电泵科技有限公司 | Emergency monitoring device for water pump controller |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360263A2 (en) * | 1988-09-22 | 1990-03-28 | Omron Tateisi Electronics Co. | Self-diagnosing proximity switch |
| CN202794460U (en) * | 2012-09-13 | 2013-03-13 | 湖南吉利汽车部件有限公司 | Hall proximity switch failure detector |
| CN103197240A (en) * | 2013-03-15 | 2013-07-10 | 江苏恒远国际工程有限公司 | Switch detector |
| CN103427816A (en) * | 2012-05-18 | 2013-12-04 | 上海梅山钢铁股份有限公司 | Proximity switch with fault detection function |
| CN203439944U (en) * | 2013-09-10 | 2014-02-19 | 山起重型机械股份公司 | Alarm device for limited detection |
-
2014
- 2014-12-24 CN CN201410813076.6A patent/CN105785966B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360263A2 (en) * | 1988-09-22 | 1990-03-28 | Omron Tateisi Electronics Co. | Self-diagnosing proximity switch |
| CN103427816A (en) * | 2012-05-18 | 2013-12-04 | 上海梅山钢铁股份有限公司 | Proximity switch with fault detection function |
| CN202794460U (en) * | 2012-09-13 | 2013-03-13 | 湖南吉利汽车部件有限公司 | Hall proximity switch failure detector |
| CN103197240A (en) * | 2013-03-15 | 2013-07-10 | 江苏恒远国际工程有限公司 | Switch detector |
| CN203439944U (en) * | 2013-09-10 | 2014-02-19 | 山起重型机械股份公司 | Alarm device for limited detection |
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| Publication number | Publication date |
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| CN105785966A (en) | 2016-07-20 |
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