CN2238819Y - Display screen for breakdown of escalator - Google Patents

Abstract

The utility model relates to a display screen for breakdown of an escalator. The utility model is characterized in that a fault input signal (1) is connected with the coding input terminal of a priority encoder (2), the coding output terminal of the priority encoder (2) is connected with the address line of a memory IC4, the data wire of the memory IC4 is connected with the decoding input terminal of a decoder (6), and the decoding output terminal of the decoder (6) is connected with a screen type display (7) which is composed of a lighting diode. The utility model can directly display breakdown occurring position of the escalator by the way of an indicator light display, and the effect of intuitional breakdown display is achieved.

Description

The escalator failure screen

The utility model relates to a kind of accident indicator of escalator.

In the prior art, because the failure detection sensor and the distance between the read-out of staircase are far away, and the breakdown signal of elevator can have twenties the tunnel, transmits multichannel signal like this and can cause the line difficulty.In order to reduce the way that signal transmits, often several signals are merged into one the tunnel, this can cause looking for trouble location trouble and shortcoming intuitively not.What also have is numeric display, need table look-up when breaking down and just can know the source of trouble.

The purpose of this utility model is to provide a kind of and the signal on the less road of breakdown signal boil down to, many roads can be transmitted, and before demonstration breakdown signal being decoded is reduced to the escalator failure screen of many roads breakdown signal.

The technical solution of the utility model is: it comprises fault detection part and fault display part, and both connect with signal transmssion line; Fault detection part is the coding input end that the fault incoming signal is connected on priority encoder, the A wire of the coding output termination memory of priority encoder, and the data line of memory connects the fault display part of back level; Described fault display part is the decoding input end that the data line of memory connects decoder, the screen formula telltale that the decoding mouth sending and receiving optical diode of decoder is formed.There is one group of data in the memory.The breakdown signal of many like this positions is exported the preceence coding of less bits behind priority encoder, the coding of these less bits is delivered to behind the address bus of memory and can be read four or the data of position still less from the data bus of memory, these data transmit the back and decipher reduction by decoder is counter, again obtain the breakdown signal of many positions, can intuitively show.

The utility model compared with prior art has following advantage:

(1). owing to adopted priority encoder, can the high-order breakdown signal of priority processing, handle time high-order breakdown signal again after high signal is normal, the rest may be inferred, and easy access personnel emphasis is handled.

(2). several signals of many position breakdown signal boil down tos are transmitted, can significantly reduce the expense of transmission lines, can cost-cutting.

The utility model will be further described below in conjunction with drawings and Examples:

Accompanying drawing 1 is a circuit block diagram of the present utility model;

Accompanying drawing 2 is the schematic circuit diagram of fault detection part of the present utility model;

Accompanying drawing 3 is connected the schematic circuit diagram of back for an embodiment of fault of the present utility model display part with accompanying drawing 5 by J6;

Accompanying drawing 4 is connected the schematic circuit diagram of back for another embodiment of fault of the present utility model display part with accompanying drawing 5 by J6; Accompanying drawing 2 and accompanying drawing 3 are connected by J5, and accompanying drawing 2 and accompanying drawing 4 are connected by J5.

Embodiment: the utility model comprises fault detection part and fault display part, fault detection part is the coding input end that fault incoming signal [1] is connected on priority encoder [2], the A wire of the coding output termination memory IC4 of priority encoder [2], the data line of memory IC4 connects the fault display part of back level; Described fault display part is the decoding input end that the data line of memory IC4 connects decoder [6], the screen formula telltale [7] that the decoding mouth sending and receiving optical diode of decoder [6] is formed.The data line of described memory IC4 connects the input end of latch IC5, the decoding input end of the output termination decoder [6] of latch IC5, and the locking control end LE of latch IC5 connects the signal output part of lock signal generator [9].Be connected to memory IC10 between the decoding input end of the DOL Data Output Line of described memory IC4 and decoder [6], data line D0～D7 of this memory IC10 connects the decoding input end of decoder [6], and the DOL Data Output Line of memory IC4 meets A wire A0～A12 of memory IC10.An input end of the decoding output termination joint denial gate of described decoder [6], the oscillator signal mouth of another input termination oscillator [8] of described joint denial gate, the negative pole of the light-emitting diode of the output termination screen formula telltale [7] of joint denial gate.Also be connected to the state incoming signal [10] of staircase running state on the A wire of described memory IC4.Safety switch is made up of normally closed contact, and safety switch is together in series in certain sequence, draws the input end of a line as a breakdown signal at the point of connection of every adjacent switch.Last termination+24V the power supply of first switch, like this when a certain switch since fault disconnect, then it and its following switch (whether fault is arranged) all therefore and dead electricity, Here it is " high priority power ".In accompanying drawing 2, introduce 24 road fault input signals [1] by J1, J2, three umbilical connectors of J3, after level conversion, send into three priority encoder IC1, IC2, IC3 (its model is 74LS154), each priority encoder has 9 input ends, 4 radix-minus-one complement mouths.When incoming signal is complete " 0 ", be output as the radix-minus-one complement " 1111 " of " 0 "; When the 9th incoming signal is " 1 ", be output as 9 radix-minus-one complement " 0110 "; When the 9th, 8 incoming signal is " 1 ", be output as 8 radix-minus-one complement 0111; When the 9th, 8,7 incoming signal is 1, be output as 7 radix-minus-one complement " 1000 ".And the like, the priority encoder breakdown signal of a priority processing high position is always handled time high-order (if having the words of a plurality of breakdown signals) after high signal is normal more like this, is equivalent to the preferential interruption in the program design.Signal converter in the accompanying drawing 1 [3] is finished by EPROM memory IC4, delivers to address bus A3～A14 that model is 27256 erasable memory EPROM from the signal of priority encoder [2] output.State incoming signal [10] comprises " normal/maintenance ", " up ", " descending " three status signals, introduce by adaptor union J4, meet A wire A0～A2 of IC4, the data line D0 of IC4～D4 5 Gray codes of output (D5～D7 does not use) enter latch IC5, and (model is 74LS373, be equivalent to the output signal [4] in the accompanying drawing 1), the LE end of latch is keyed end, this termination lock signal generator [9].Referring to accompanying drawing 2, lock signal generator can heavily be triggered univibrator 74LS123 (being IC6 and IC7) and formed with door input principal and subordinate J-K flip flop 7472 (being IC8) by two, its input end is connected on the lower end of last safety switch, when trouble free takes place, the TR-end of IC6 (being 74LS123) is high level, lock signal generator is not worked, and J-K flip flop IC8 exports high level, and latch IC5 is an open state.When fault takes place, breakdown signal is exported 5 Gray code breakdown signals via fault input end, priority encoder, signal converter, output signal, simultaneously, because safety switch disconnects, the TR-end of IC6 (being 74LS123) becomes low level by high level, trigger univibrator and produce a monostable pulse, monostable pulse triggers univibrator again and produces a monostable pulse again.After the monostable time-delay of two-stage, trigger J-K flip flop IC8 again, make its mouth become low level, this low level through the ratio end of latch IC5 (being 74LS373) 5 Gray code breakdown signals lockings of having exported just now.The characteristic of (promptly 7472) circuit determines because IC6 (being 74LS123) and IC8, when et out of order after the fault restoration or once more, J-K flip flop can not trigger again, until the CLR of IC8 end the low level signal input is arranged, after J-K flip flop is reset, when the TR-of IC6 (being 74LS123) end had low level, it can trigger once more.Output signal [4] is connected to failure screen through long signal transmission line.IC9 is power supply 7805 integrated packages, and the effect of being finished is voltage stabilizing, and the VCC among the figure is a positive source.Deliver to signal conversion [5] by 5 Gray code breakdown signals that fault detection part is sent here, connect through adaptor union J5 therebetween, signal conversion [5] is finished by IC10, its model is erasable memory 2764, IC10 is with 5 Gray codes soft decoding once more, be translated into 6 binary codes, send two 4-16 line decoder IC11 and IC14 (model of decoder is 74LS154), be translated into cooresponding 28 tunnel faults of input fault signal or mode of operation shows signal and deliver to screen formula telltale.Screen formula telltale is made up of NAND gate, joint denial gate and light emitting diode matrix, when safety return circuit just often, all mouths of 4 lines-16 line decoder are high level entirely, open all joint denial gates, make red safety light bright entirely.When breakdown signal was imported, 4-16 line decoder translated cooresponding breakdown signal, and making the corresponding output pin of 4-16 line decoder is low level, and the ripple level on another input pin of corresponding joint denial gate can be exported, and the control safety light is glittering.According to position or the letter of glittering indicator lamp on display panel, can find trouble location very soon, rapidly trouble-shooting.Oscillator [8] is made up of two three or five IC circuit 12 and IC13 (model 556), and IC13 is a free running multivibrator, and oscillator signal is delivered to an input pin of all joint denial gates, for the glittering usefulness of fault.IC12 is connected into soft-touch control, and when switch was touched in the hand contact, it just exported a high level, goes the CLR of the J-K flip flop IC8 of control fault test section to hold after anti-phase, and the J-K flip flop that resets makes the release of IC5 latch.Accompanying drawing 3 or accompanying drawing 4 are connected by adaptor union J6 with accompanying drawing 5.Accompanying drawing 3 is embodiment of the decoding part of fault display part with accompanying drawing 4, has omitted IC10 in the accompanying drawing 4, also is simple embodiment comparatively, and this moment is with other code system.The utility model directly shows the fault happening part of escalator in the mode of tell tale display, gives the user with fault display effect intuitively, realizes the transmission of minimum position, strong adaptability, reliability height, good in anti-interference performance with simple proposal.Have lock function, this is for finding that the escalator transient fault is effective especially, and it can help the maintainer in time to find the hidden danger of escalator, avoids the generation of accident.

Claims (5)

1. escalator failure screen, comprise fault detection part and fault display part, it is characterized in that: fault detection part is the coding input end that fault incoming signal [1] is connected on priority encoder [2], the A wire of the coding output termination memory IC4 of priority encoder [2], the data line of memory IC4 connects the fault display part of back level; Described fault display part is the decoding input end that the data line of memory IC4 connects decoder [6], the screen formula telltale [7] that the decoding mouth sending and receiving optical diode of decoder [6] is formed.

2. escalator failure screen according to claim 1, it is characterized in that: the data line of described memory IC4 connects the input end of latch IC5, the decoding input end of the output termination decoder [6] of latch IC5, the locking control end LE of latch IC5 connects the signal output part of lock signal generator [9].

3. escalator failure screen according to claim 1, it is characterized in that: be connected to memory IC10 between the decoding input end of the DOL Data Output Line of described memory IC4 and decoder [6], the data line of this memory IC10 connects the decoding input end of decoder [6], and the DOL Data Output Line of memory IC4 connects the A wire of memory IC10.

4. escalator failure screen according to claim 1, it is characterized in that: an input end of the decoding output termination joint denial gate of described decoder [6], the oscillator signal mouth of another input termination oscillator [8] of described joint denial gate, the negative pole of the light-emitting diode of the output termination screen formula telltale [7] of joint denial gate.

5. escalator failure screen according to claim 1 is characterized in that: the state incoming signal [10] that also is connected to the staircase running state on the A wire of described memory IC4.

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