CN203715052U

CN203715052U - Escalator self-diagnosis regulation control safety protection device

Info

Publication number: CN203715052U
Application number: CN201420085672.2U
Authority: CN
Inventors: 马刚; 崔玉石; 黄征; 毛鹤同; 李振才
Original assignee: Shenyang Brilliant Elevator Co Ltd
Current assignee: Shenyang Yuanda Intellectual Industry Group Co ltd
Priority date: 2014-02-27
Filing date: 2014-02-27
Publication date: 2014-07-16
Anticipated expiration: 2024-02-27

Abstract

The utility model discloses an escalator self-diagnosis regulation control safety protection device. The device solves the problem that the prior art cannot meet the requirement of SIL2, comprises a metal casing with an external interface and a main control circuit board, and is technically characterized in that the main control circuit board adopts a combined two-channel self-diagnosis structure; input interfaces of all sensors are respectively connected with all control processing units, and then are respectively connected with all output electronic connectors and corresponding output relay through an output logical processing unit; the control processing units are connected one another through communication modules, so as to perform timed exchange among data of the control processing units. The device has a simple structure, is reasonable in design, only adopts a small amount of electronic devices to form two-channel self-diagnosis circuit control which is completely independent and performs data exchange through communication modules, realizes a multichannel redundant structure only by two logic gates, reduces the cost, and meanwhile improves the security and the reliability of a control system.

Description

Staircase selfdiagnosis regulates controls safety guard

Technical field

The utility model relates to a kind of for guaranteeing the fender guard of escalator and moving sidewalk safe in operation, and the staircase selfdiagnosis of hypervelocity, reverse, step deletion, handrail speed monitoring, machine room cover plate monitoring, drg action monitoring and braking distance monitoring that particularly a kind of escalator and moving sidewalk are used regulates controls safety guard.Belong to escalator and moving sidewalk operation monitoring field.

Background technology

Along with concentrated places of passenger flow volume such as megastore, supermarket, airport and subway stations, escalator and moving sidewalk are more and more universal, and for this reason, whether the safe operation of escalator is directly connected to people's quality of life and even relates to life security.

The programmable safe circuit card of tradition escalator and moving sidewalk is generally realized by sensor, input interface, Logical processing unit, output interface and the better simply circuit of relay geometric ratio, and it is classified as to vital circuit.But there are some safety precautions more complicated, for example, work as escalator or moving sidewalk and exceed the speed limit, reverse, when step pedal disappearance and handrail and pedal speed deviation are excessive, disconnect vital circuit, make staircase out of service, prevent that passenger from coming to harm.Must realize by programmable electronic system.

In view of current China escalator and moving sidewalk seating capacity many, working strength is large, the features such as Frequent Accidents, in GB " manufacture of GB16899-2011 escalator and moving sidewalk and installation safety standard ", the functional safety of the safe related system of electrical/electronic/programmable electronic has been proposed to new requirement, should meet the regulation of " the functional safety part 2 of the safe related system of GB/T 20438.2-2006 electrical/electronic/programmable electronic: the requirement of the safe related system of electrical/electronic/programmable electronic ", associated safety function comprises the main Motor Over Speed that staircase drives, drive the unexpected reverse speed operation of main frame, sink/the disappearance of step or pedal, should prevent from starting, left and right handrail speed deviations step, the actual speed of pedal exceed-15% and time length exceed 15 seconds, check whether braking distance exceeds 1.2 times of maximum permissible value, check opening of truss region access panel or opening or removing of floor plates, check the action of additional brake, check the disappearance of step or pedal, check opening of service brake, above function all requires to have SIL2 grade.

Report according to Patents; if publication No. is CN102372222A in " reverse, hypervelocity and the stall protection vital circuit of escalator and moving sidewalk "; the control processing module that comprises input control module, adopts multiple programmable logic device (PLD) is disclosed; as the circuit structure of the formations such as CPLD and output execution module; it realizes non-operating reversed protection, and can realize hypervelocity and stall protection.In " escalator and the moving sidewalk safety system " that be CN202766071U in publication No., the safety system of record comprises power source special, control desk, sensor and switch etc., and its redundancy setting by Logical processing unit is improved the safety of system.But above-mentioned two patents just adopt two MCU Redundancy Design, its input, output not adopt the binary channel design of standard, and safety is lower.And two MCU work alone, mutually do not contact the detected state easily making the mistake; In the time that two MCU lost efficacy, system cannot detect fault, and reliability is very low.The output of Logical processing unit MCU directly connects control relay, and its control signal is easily interfered, and causes misoperation.Above problem causes the safety guard of escalator at present used and moving sidewalk cannot meet the requirement of security function certification SIL2, and practicality is poor.

Utility model content

The purpose of this utility model is to provide a kind of staircase selfdiagnosis and regulates control safety guard; solve prior art and cannot meet the problem that SIL2 requires; it is simple in structure; reasonable in design; only form completely independently, mutually carry out the binary channel self-diagnostic circuit control of data exchange by communication module separately with a small amount of electronics package; use two logical gates just to realize multi-channel redundant structure, in reducing costs, greatly improved the safety and reliability of control system.

The technical scheme that the utility model adopts is: this staircase selfdiagnosis adjusting control safety guard comprises with the metal shell of external interface and is assembled in the main control board in housing, its technical essential is: described main control board adopts combined type binary channel selfdiagnosis structure, first of the sensor of each detection signal, the second input interface respectively with first of Programmable Logic Controller composition, the second controlled processing unit connects, then by by with or the output logic processing unit that forms of door be connected respectively first, the second output electrical interface, the first output electrical interface is respectively with first, the second output relay connects, the second output electrical interface is respectively with the 3rd, the 4th output relay connects, first, the second controlled processing unit interconnects by communication module separately, the data of self and the other side are passed to the data of coming and carry out timing exchange.

The interconnective communication module of described first, second controlled processing unit is every 50 milliseconds of exchange one-time detection data and computational data.

Described output logic processing unit comprises one and logical gate and one or logical gate.

Advantage of the present utility model and the good effect producing are: because the utility model has adopted combined type binary channel selfdiagnosis structure, each passage comprises input interface of relatively independent sensor, one uses powerful Programmable Logic Controller as controlled processing unit, an output electrical interface and a pair of output relay, output logic processing unit gathers alone two-way sensor signal, then carry out computing, and the controlled processing unit of two passages is connected by the communication module carrying, timing exchange input data and service contamination, exchange incoming signal mutually, control information and failure message, realize self-diagnostic function, to find potential danger and fault, so it is simple in structure, reasonable in design, only form completely independently with a small amount of electronics package, mutually carry out the binary channel self-diagnostic circuit control of data exchange by communication module separately, just realized multi-channel redundant structure.Because adopting one and logical gate and one or logic gates; the output signal of output logic processing unit is carried out to logic output to be processed; form the logic export structure of 4 passages through output relay; therefore greatly reduce the common cause failure factor between passage; make the per hour dangerous failure probability of protector meet SIL2 requirement; system safety, reliability are high, have practical value very.Therefore, the utility model has solved prior art cannot reach the problem that SIL2 requires, and has fundamentally met the requirement of new national standard to escalator programmable electronic safety system, and all security functions all reach Sil2 grade.

Brief description of the drawings

Below in conjunction with accompanying drawing, the utility model is further described.

Fig. 1 is a kind of selfdiagnosis adjusting control circuit constructional drawing of the present utility model.

Nomenclature in figure: S1 ~ Sn sensor, J1 sensor the first input interface, J2 sensor the second input interface, MCU1 the first controlled processing unit, MCU2 the second controlled processing unit, DIS1 the first communication module, DIS2 the second communication module, LOG output logic processing unit, OUT1 first export electrical interface, OUT2 second exports electrical interface, KA1, KA2 the first output safety relay, KA3, KA4 the second output safety relay.

Detailed description of the invention

Below in conjunction with Fig. 1, the utility model is described in further detail.This staircase selfdiagnosis regulates to be controlled safety guard and comprises with the metal shell (not shown) of external interface and be assembled in the parts such as main control board in housing.Wherein main control board adopts combined type binary channel selfdiagnosis structure.In combined type binary channel, the first input interface J1 of the sensor S1 ~ Sn of each detection signal, the second input interface J2 are connected with the first controlled processing unit MCU1, the second controlled processing unit MCU2 of Programmable Logic Controller composition respectively.Then the first controlled processing unit MCU1, the second controlled processing unit MCU2 by by with or the output logic processing unit LOG that form of door be connected respectively the first output electrical interface OUT1, second and export electrical interface OUT2.The first output electrical interface OUT1 is connected respectively KA1 with the first output relay, the second output relay KA2 connects, and the second output electrical interface OUT2 is connected with the 3rd output relay KA3, the 4th output relay KA4 respectively.First, second controlled processing unit MCU1, MCU2 interconnect by the first communication module DIS1, the second communication module DIS2 separately, the data of self and the other side are passed to the data of coming and carry out timing exchange.Interconnective the first communication module DIS1, the second communication module DIS2 of the first controlled processing unit MCU1, the second controlled processing unit MCU2, every 50 milliseconds of exchange one-time detection data and computational data.Output logic processing unit LOG comprises one and logical gate and one or logical gate.

As shown in Figure 1, sensor the first and second input interface J1 are connected input pickup S1 ~ Sn with J2, the signal detecting is inputed to respectively to first, second controlled processing unit MCU1 and MCU2, for detection of the running state of escalator and moving sidewalk.Described signal is divided into master control unit command signal and escalator and moving sidewalk real-world operation status signal.Master control unit command signal comprises staircase operating instruction signal, maintenance command signal, service direction signal, drg and additional brake actuating signal, at a slow speed command signal and the fast switching signal of section; Escalator and moving sidewalk real-world operation status signal comprise main frame speed signal, handrail speed signal, step impulse singla, drg and additional brake on-off signal, floor cover plate signal and driving chain chain rupture signal.The channel structure of employing standard, has realized the isolation of incoming signal.

The first and second controlled processing unit MCU1 and the MCU2 that formed by Programmable Logic Controller, input pulse signal is carried out to calculation process, calculation of parameter in conjunction with switching value incoming signal and the operation of predefined staircase goes out the running state of staircase and current running velocity, left and right handrail speed or braking distance, then with predefined hypervelocity threshold values, velocity deviation threshold values or braking distance threshold values compare, in the time of the running state of escalator in safety, MCU1 and MCU2 export respectively a high level signal and a low level signal, two high level signals enter and logical gate, two low level signals enter or logical gate.Receive the forward end of safety relay KA1 ~ KA4 with logical gate output high level signal, or the low level signal of logical gate output is received the negative end of safety relay KA1 ~ KA4, the voltage difference of low and high level signal will drive safety relay KA1 ~ KA4 action, safety return circuit and the additional brake power supply of connecting escalator, make escalator operation.Have one for low if entered with two high level signals of logical gate,, enter or two low level signals of logical gate have one for high output low level with logical gate, or logical gate will export high level, make safety relay KA1 ~ KA4 disconnection.Processed and ensured two logical process passages by such logic redundancy, if there is an et out of order, safety fender guard will disconnect escalator safety return circuit and additional brake power supply, make staircase out of service.And in the time stopping escalator and moving sidewalk operation, can prevent because the error starting that electromagnetic interference, power line voltage fault or program error cause by such logic redundancy processing.

MCU1 is connected by the communication module carrying with MCU2, between the Programmable Logic Controller of 50 milliseconds of two passages, exchanges a secondary data, comprises incoming signal and operation result, by comparator input signal, can find the fault of sensor input end.By comparison operation result, can find the potential fault of MCU1 and MCU2, and provide failure message.Even if all there is fault in two passages, also can determine by comparing fault content the real-world operation state of system, realize self-diagnostic function, further improve the safety of escalator and moving sidewalk.

Claims

1. a staircase selfdiagnosis regulates and controls safety guard, comprise with the metal shell of external interface and be assembled in the main control board in housing, it is characterized in that: described main control board adopts combined type binary channel selfdiagnosis structure, first of the sensor of each detection signal, the second input interface respectively with first of Programmable Logic Controller composition, the second controlled processing unit connects, then by by with or the output logic processing unit that forms of door be connected respectively first, the second output electrical interface, the first output electrical interface is respectively with first, the second output relay connects, the second output electrical interface is respectively with the 3rd, the 4th output relay connects, first, the second controlled processing unit interconnects by communication module separately, the data of self and the other side are passed to the data of coming and carry out timing exchange.

2. staircase selfdiagnosis according to claim 1 regulates and controls safety guard, it is characterized in that: the interconnective communication module of described first, second controlled processing unit is every 50 milliseconds of exchange one-time detection data and computational data.

3. staircase selfdiagnosis according to claim 1 regulates and controls safety guard, it is characterized in that: described output logic processing unit comprises one and logical gate and one or logical gate.