CN203255857U - Safe electronic monitoring device of escalator and side pavement functions - Google Patents
Safe electronic monitoring device of escalator and side pavement functions Download PDFInfo
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- CN203255857U CN203255857U CN 201320292872 CN201320292872U CN203255857U CN 203255857 U CN203255857 U CN 203255857U CN 201320292872 CN201320292872 CN 201320292872 CN 201320292872 U CN201320292872 U CN 201320292872U CN 203255857 U CN203255857 U CN 203255857U
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Abstract
The utility model discloses a safe electronic monitoring device of escalator and side pavement functions. The safe electronic monitoring device comprises a power supply module, an input channel, a logic control module, a display part and an output channel, wherein the output channel comprises an MOS (Metal Oxide Semiconductor) tube, a CAN (Controller Area Network) communication and a relay output part; the relay output part comprises a 1.2 relay output A, a 1.2 relay output B, a 1.4 relay output A and a 1.4 relay output B; and in the relay output part, each relay output comprises a safe relay output module, a driving diagnosis circuit module and an electric shock feedback diagnosis module. According to the safe electronic monitoring device disclosed by the utility model, before a system enters an operation state, the safe electronic monitoring device is started to automatically detect; if the detection is normal, the normal operation of the system is not influenced; and when the system is at the operation state, a driving circuit is detected under the condition that a safety relay is not switched off. Compared with the prior art, the safe electronic monitoring device of the escalator and side pavement functions disclosed by the utility model has better practicability and higher safety.
Description
Technical field
The utility model discloses a kind of escalator, footway functional safety electronic monitoring device, belong to safe microcontroller in the application in escalator, safety control field, footway.
Background technology
Escalator, footway mainly are installed on the public places such as airport, station, subway, market as a kind of vehicle, and personnel are intensive, complicated, in case have an accident, can have serious consequences.The safety on escalator, footway is of crucial importance, and national standard has strict standard.In the prior art; the monitoring and protecting device of escalator utilizes sensitive member; obtain the hand of rotation of escalator motor or main frame turning unit and two electric impulse signals that are staggered of rotating speed; for the microprocessor computing in the staircase controller; contrast preassigned parameter again and judge whether main frame exceeds the speed limit or reverse, and control signal is flowed to power-supply controller of electric carry out and close down protection.The detection of prior art and control majority need to carry out in that elevator is in service, even and operating elevator is carried out measures such as closing down protection, also cause easily safety misadventure.Simultaneously, prior art also lacks corresponding detection means to the driving circuit that installs itself.
Summary of the invention
The utility model is by to the innovative design of outputting circuit for relay, realized that startup self-checking function and the operating driving circuit of escalator, footway functional safety electronic monitoring device detects.
The utility model is for solving the problems of the technologies described above by the following technical solutions:
A kind of escalator, footway functional safety electronic monitoring device comprise power module, input channel, Logic control module, display part and delivery channel; Power module andlogic control module is connected, and input channel inputs to Logic control module with signal, and Logic control module outputs signal to respectively display part and delivery channel; Described delivery channel repeat circuit output comprises the safety relay output module, drives the diagnostic circuit module, gets an electric shock and feed back diagnostic module, wherein:
The safety relay output module comprises optic coupler, the first resistance, the second resistance, diode, intermediate relay, the first switch; Logic control circuit outputs control signals to the negative electrode of optic coupler, the anode of optic coupler is connected with an end of the first resistance, the other end of the first resistance respectively with the negative pole of diode, the first input end of intermediate relay is connected, the earthing pole of optic coupler respectively with an end of the second resistance, the grid of metal-oxide-semiconductor is connected, the other end of the second resistance rear ground connection that is connected with the source electrode of metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor respectively with the positive pole of diode, the second input end of intermediate relay, the input end that drives the diagnostic circuit module is connected, and the control end of intermediate relay through the first switch respectively and power supply, the input end of the feedback of getting an electric shock diagnostic module is connected;
Drive the diagnostic circuit module and comprise a filter circuit and an optic coupler, the drain electrode collection signal of metal-oxide-semiconductor inputs to filter circuit, inputs to the logic control circuit module after the optic coupler isolation;
The feedback of getting an electric shock diagnostic module is a filter circuit, and intermediate relay and the first switch consist of the safety relay normally closed contact, and described safety relay normally closed contact collection signal through contact feedback diagnostic module, exports the logic control circuit module to.
The utility model compared with prior art namely starts before system enters running state from detection, as detects normally, does not affect the normal operation of system; When system is in running state, can in the situation that safety relay does not disconnect, detect driving circuit.The disclosed escalator of the utility model, footway functional safety electronic monitoring device compared with prior art have the safety of better practicality and Geng Gao.
Description of drawings
Fig. 1 is the constructional drawing of escalator, footway functional safety electronic monitoring device,
Wherein: 1. power module; 2. input channel; 3. Logic control module; 4. display part; 5. delivery channel.
Fig. 2 is the structured flowchart of the utility model repeat circuit output circuit,
Wherein: 6. relay output.
Fig. 3 is the circuit diagram of the utility model repeat circuit output circuit,
Wherein: 7. safety relay output module; 8. driving diagnostic circuit; 9. diagnostic circuit is fed back in the contact; KA, 11,12 common formation safety relay normally closed contacts.
The specific embodiment
The utility model with two safe microcontrollers of TMS470M as master controller, monitoring consists of escalator, footway functional safety electronic monitoring device mutually, utilize it built-in such as CPU and RAM self check engine, ECC and parity check etc. and a large amount of communicate by letter and control peripheral hardware come support function safe electronic control monitor unit to satisfy escalator, footway to the requirement of safety control; In order to reach the safe class requirement, technical employing binary-channel redundancy design.
Each driving circuit series connection access escalator in the safety relay output of this device or the safety return circuit of moving sidewalk.This device has hypervelocity, reversal protection function, up/down section step deletion supervision defencive function, and these meet the SIL2 class requirement of stipulating in GB16899 and the GB/T20438 safety rate, also have the handrail and the band-type brake monitoring function that meet the SIL1 class requirement.For the various failure conditions that escalator may occur in operational process, safety device has logic to be judged and the input monitoring function, can make safety guard-safeguard action and fault simultaneously and show.Whole device mainly is comprised of the five functional module: power module, input channel, Logic control module, display part and delivery channel.
Power module: this device use+24V power supply is directly provided by the external switch power supply.Power module is made of separate passage a-power supply module, channel B power module; Passage a-power supply module is comprised of power supply A, monitoring power supply A, working power is provided for logic control CPU1; The channel B power module is comprised of power supply B, monitoring power supply B, working power is provided for logic control CPU2.Power supply A, power supply B are two groups of insulating power supplies, and output voltage is+3.3V.Monitoring power supply A, monitoring power supply B then monitor the output voltage of power supply A, power supply B respectively, when magnitude of voltage be lower than+during 3V, produce reset signal, CPU resets.Also having a CAN power supply in addition is that the CAN communication module is powered.
Input channel: the input channel of functional safety electronic monitoring device mainly is comprised of three parts: input is inputted, is arranged in pulse input, detection.Use and " JTAG1 " and " JTAG2 " producer is inner, as chip CPU1 and CPU2 burning program mouth (not reflecting in the accompanying drawing).Pulse is input as the input of opto-electronic pickup acquisition pulse signal; Detection is input as the detection signal input of the contactless switchs such as direction, operation, band-type brake feedback.Two groups of signal formations are redundant, and Logic control module can check that to two groups of signals if two groups of state differences that signal provides, then system can make safe handling (cut-out safety return circuit) to the running state on escalator, footway by delivery channel.It is to carry out relative set for the functional safety electronic monitoring device that use on different ladder kinds, specification escalator, footway that input is set.
Logic control module: mainly formed by logic control CPU1, logic control CPU2.Logic control CPU1, logic control CPU2 have the logic functions such as identical step deletion, velocity determination, reverse judgement, handrail test the speed, band-type brake monitoring.Logic control CPU1, logic control CPU2 consist of mutually redundant, and realize that two interchannel communications are so that system is more safe and reliable.
Display part: formed by LED3, charactron A, LED4, charactron B.LED3 is as the working station indicator of logic control CPU1; LED4 is as the working station indicator of logic control CPU2; Charactron A is used for the failure message of display logic control CPU1 output; Charactron B is used for the failure message of display logic control CPU2 output.
Delivery channel: consisted of by metal-oxide-semiconductor, CAN communication, 1.2 relays output A, 1.2 relays output B, 1.4 relays output A, 1.4 relays output B.The running state on escalator, footway and breakdown signal are exported by metal-oxide-semiconductor by logic control CPU1, and this signal exports primary controller to; By logic control CPU2 by the CAN communication realize with master controller between mutually intercommunication, realize simultaneously self-test function.
Delivery channel has two kinds of relay export structures: a kind of is two safety relaies, i.e. 1.2 relays output A, 1.2 relays output B; Another kind is four safety relay outputs, and two 1.4 relays output A, 1.4 relays output B are namely arranged again.If additional brake is arranged, then must adopt the output of four safety relaies; If without additional brake, then two kinds of structures all can adopt.Require the output series connection of safety relay contact to enter in the safety return circuit of escalator or moving sidewalk, its effect is equivalent to safety switch in the safety return circuit.The output of safety relay has the safety return circuit function of confirming whether the safety relay contact is connected and entered escalator.
In the delivery channel, 1.2 relays output A, 1.2 relays output B and 1.4 relays output A, 1.4 relays output B are similar on hardware configuration, independently input and output interface is arranged separately, and single outputting circuit for relay structured flowchart as shown in Figure 2; Further physical circuit figure as shown in Figure 3.
Single outputting circuit for relay detailed structure view shown in Figure 3 is comprised of safety relay output module, driving diagnostic circuit, contact feedback diagnostic circuit.When logic control circuit is exported a low level control signal, optic coupler negative electrode to the safety relay output module (anode of optic coupler by pull-up resistor to power supply VCC), make optic coupler conducting, driven MOS pipe, drive the safety relay action by metal-oxide-semiconductor again.When logic control circuit is exported the control signal of a high level, not conducting of optic coupler, the metal-oxide-semiconductor cut-off disconnects the safety relay control loop, and safety relay is failure to actuate.
Safety relay output module andlogic control circuit is isolated through optic coupler, and the operating voltage VCC of logic control circuit adopts the DC3.3V power supply, and the operating voltage of safety relay output module is the DC24V power supply.
Whether the driving (metal-oxide-semiconductor) and the safety relay that detect in the safety relay output module be working properly, finished by driving diagnostic circuit, contact feedback diagnostic circuit.Working process is as follows:
1) the drain electrode collection signal by metal-oxide-semiconductor inputs to the driving diagnostic circuit, after processing through filtering, level conversion (signal isolation), returns and exports logic control circuit to, is carried out the logic judgement and is checked fault by logic control circuit.Should be noted that metal-oxide-semiconductor feedback detection signal need be through inputing to logic control circuit after the optic coupler isolation, to prevent the damage of the cpu chip in the logic control circuit again;
Whether the safety relay that 2) detects in the safety relay output module works: input to contact feedback diagnostic circuit by safety relay normally closed contact (KA:11,12) collection signal, after the filtering processing, return and export logic control circuit to, carry out the logic judgement and check fault by logic control circuit.Concrete method of inspection is in " startup self-test function ", " driving circuit detection in service " and " safety relay drives and detects " explanation;
In safety relay output module (7), the 2 secondary open contacts of 1.2 relays output A are connected with the 2 secondary open contacts of 1.2 relays output B, finally the fourth officer contact is series-connected in the safety return circuit on escalator or footway altogether.Similarly, 1.4 relays output A, 1.4 relays output B do same the processing.
Below in conjunction with accompanying drawing the embodiment of the invention is elaborated.
1, starts self-test function
This device is behind power connection, and safety relay has a self-monitoring process, finishes in 2 seconds.During this time 1.2 relays output A, 1.2 relays output B want 2 self checks of break-make, and two passage self check times staggered mutually, and this moment, the safety return circuit of escalator disconnected all the time.Powering on, escalator does not also enter running state in 2 seconds, the operation of not impact system.If any 1.4 relays output A, the same self check of 1.4 relays output B.
After the device power-on self-test was finished, under the escalator halted state, LED3, LED4, charactron A, charactron B can show running state and failure message.When work, LED3, LED4 be flicker continuously.If charactron A, charactron B show " 0 ", then control system for escalator trouble free.
2, driving circuit in service detects
When running state, logic control CPU1 output drives 1.2 relays output A, 1.2 relays output B all the time; Logic control CPU1 output drives 1.4 relays output A, 1.4 relays output B all the time.For output circuit is detected higher diagnosis coverage rate is arranged, whether normal by detecting its driving circuit in the situation about not disconnecting at safety relay.Method is: every each safety relay driving circuit of 1 section time Polling, detect and finish within 1 to 2 millisecond time, safety relay has little time to disconnect.Between detection period, logic control CPU1 or logical control CPU1 exports several diagnosis impulse singlas and exports to safety relay, check simultaneously the impulse singla of the feedback that drives diagnostic circuit, consistent then safety relay output is normal, otherwise disconnect all safety relay outputs, cut off the safety return circuit on escalator or footway, make it out of service immediately.
3, safety relay drives and detects
For guaranteeing safety, before first operation escalator, confirm that safety relay is correctly connected to enter in the safety return circuit of escalator.Step is as follows: after powering on, and when the staircase safety return circuit is connected, again outage, pull out the JP3 plug-in unit of Logic control module inside, re-power, charactron A, charactron B show trouble free, but the staircase safety return circuit is obstructed, illustrates that safety relay correctly seals in the staircase safety return circuit.
4, main frame speed detects
Utilize (or several) metal induction projection (groove) to be installed on the turning unit (flywheel) that links to each other with the escalator hoisting motor, when passing through magnet proximity switch, rotation produces pulse, after being processed by input pulse again, the input logic control module is by logic control CPU1, the logic control CPU2 computing of testing the speed.When speed surpasses 1.2 times of command speves, disconnect 1.2 relay A, 1.2 relay B string contact in safety return circuit by delivery channel, cut off the safety return circuit on escalator or footway, make it out of service immediately.When the speed that reaches surpasses 1.4 times of command speves, disconnected simultaneously the contact of 1.4 relay A, 1.4 relay B by delivery channel, cut off auxiliary band-type brake power supply, further make it out of service immediately.
5, reverse and step test the speed
At the step roller track support two magnet proximity switch (photoelectric switch) are installed: magnet proximity switch 1 and magnet proximity switch 2, installing space equal the step width and add (or deducting) step roller diameter.When step moved, front (or rear) step roller interdicted first magnet proximity switch 1, produces step impulse singla 1, continues in the same way operation, and rear (or front) step roller interdicts magnet proximity switch 2 again, produces step impulse singla 2.Step impulse singla 1 phase place is ahead of step impulse singla 2 like this, and two impulse singlas have half overlapping (breaking time).The step impulse singla, after the input pulse processing, the input logic control module is by logic control CPU1, logic control CPU2 computing.Judge the step service direction according to two step impulse singla phase places; Calculate again the running velocity of staircase by the cycle of detecting each impulse singla.Magnet proximity switch 1 and magnet proximity switch 2 be as mutually redundant speed sense channel, to detecting 1.2 times or 1.4 times of hypervelocities, and protects.
Logic control CPU1, the logic control CPU2 step service direction that computing obtains according to the step impulse singla, when not conforming to the service direction that requires output, disconnect 1.2 relays output A, 1.2 relays output B string contact in safety return circuit by delivery channel, cut off the safety return circuit on escalator or footway, make it out of service immediately; Disconnect simultaneously the contact of 1.4 relays output A, 1.4 relays output B, cut off auxiliary band-type brake power supply, further make it out of service immediately.
6, handrail speed detects
Compress fifth wheel by handrail, fifth wheel rotates with handrail.Have equably several circular shrinkage hole on fifth wheel, magnet proximity switch is fixed, and over against the shrinkage pool position of fifth wheel.When fifth wheel rotates; the magnet proximity switch output pulse signal; after the input pulse processing; the input logic control module; by logic control CPU1, logic control CPU2 computing; calculate the speed of handrail; the velocity ratio of surveying with step; handrail speed be lower than corresponding step speed 85% the time; and continue 15 seconds, and disconnect 1.2 relays output A, 1.2 relays output B string contact in safety return circuit by delivery channel, cut off the safety return circuit on escalator or footway; make it out of service immediately, the protection thereby the realization handrail tests the speed.
7, step deletion detects
At the step round end of escalator machine room upper, machine room lower, each installs 1 cover mirror-reflection photoelectric switch, detects the state of step.Under normal circumstances, when staircase moved, photoelectricity only was not blocked at the graded gap place, and all the other most of positions are all blocked by step; When step deletion, in whole step scope all without blocking, thereby produce the step deletion detection signal.Cooperate main frame to test the speed, calculate the miles of relative movement of step, when the distance that does not have step to block exceeds the step width, thereby judge step deletion.
The step deletion detection signal is after input pulse is processed, by logic control CPU1, logic control CPU2 computing, disconnect 1.2 relays output A, 1.2 relays output B string contact in safety return circuit by delivery channel, cut off the safety return circuit on escalator or footway, make it out of service immediately.
8, band-type brake monitoring
Be installed in safety switch signal on the main frame band-type brake by detection, feedback band-type brake action situation.When escalator and moving sidewalk operation, feedback band-type brake on-off signal inputs to logic control CPU1, logic control CPU2 by detecting, monitor its band-type brake instruction and band-type brake feedback logic when inconsistent, cut off 1.2 relays output A, 1.2 relays output B, disconnect the power supply of the safety return circuit of escalator or moving sidewalk, make it out of service immediately.
Claims (1)
1. an escalator, footway functional safety electronic monitoring device comprise power module, input channel, Logic control module, display part and delivery channel; Power module andlogic control module is connected, and input channel inputs to Logic control module with signal, and Logic control module outputs signal to respectively display part and delivery channel; It is characterized in that described delivery channel repeat circuit output comprises the safety relay output module, drives the diagnostic circuit module, gets an electric shock and feed back diagnostic module, wherein:
The safety relay output module comprises optic coupler, the first resistance, the second resistance, diode, intermediate relay, the first switch; Logic control circuit outputs control signals to the negative electrode of optic coupler, the anode of optic coupler is connected with an end of the first resistance, the other end of the first resistance respectively with the negative pole of diode, the first input end of intermediate relay is connected, the earthing pole of optic coupler respectively with an end of the second resistance, the grid of metal-oxide-semiconductor is connected, the other end of the second resistance rear ground connection that is connected with the source electrode of metal-oxide-semiconductor, the drain electrode of metal-oxide-semiconductor respectively with the positive pole of diode, the second input end of intermediate relay, the input end that drives the diagnostic circuit module is connected, and the control end of intermediate relay through the first switch respectively and power supply, the input end of the feedback of getting an electric shock diagnostic module is connected;
Drive the diagnostic circuit module and comprise a filter circuit and an optic coupler, the drain electrode collection signal of metal-oxide-semiconductor inputs to filter circuit, inputs to the logic control circuit module after the optic coupler isolation;
The feedback of getting an electric shock diagnostic module is a filter circuit, and intermediate relay and the first switch consist of the safety relay normally closed contact, and described safety relay normally closed contact collection signal through contact feedback diagnostic module, exports the logic control circuit module to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320292872 CN203255857U (en) | 2013-05-24 | 2013-05-24 | Safe electronic monitoring device of escalator and side pavement functions |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320292872 CN203255857U (en) | 2013-05-24 | 2013-05-24 | Safe electronic monitoring device of escalator and side pavement functions |
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| CN203255857U true CN203255857U (en) | 2013-10-30 |
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| CN 201320292872 Expired - Fee Related CN203255857U (en) | 2013-05-24 | 2013-05-24 | Safe electronic monitoring device of escalator and side pavement functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858430A (en) * | 2016-05-13 | 2016-08-17 | 杭州优迈科技有限公司 | Soft shutdown control system and soft shutdown control method |
| CN107954289A (en) * | 2017-10-31 | 2018-04-24 | 浙江升航电子科技有限公司 | A kind of construction elevator safety protection control system |
-
2013
- 2013-05-24 CN CN 201320292872 patent/CN203255857U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105858430A (en) * | 2016-05-13 | 2016-08-17 | 杭州优迈科技有限公司 | Soft shutdown control system and soft shutdown control method |
| CN107954289A (en) * | 2017-10-31 | 2018-04-24 | 浙江升航电子科技有限公司 | A kind of construction elevator safety protection control system |
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Granted publication date: 20131030 Termination date: 20210524 |
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| CF01 | Termination of patent right due to non-payment of annual fee |