CN1015946B - Improved monitoring method and apparatus - Google Patents

Abstract

The invention relates to a method and a device for monitoring: a plurality of signals which follow one another are of substantially the same shape and are therefore substantially identical and are intended to trigger an alarm and/or parking function in the event of loss of signal and/or the occurrence of one or more unknown and unacceptable deviations in the shape of the signal being monitored and to prevent the triggering of an alarm and/or parking function in the event of one or more known and acceptable deviations in the shape of the signals following one another, the signal being monitored and being digitised and fed to an intermittence and comparator circuit for producing a signal indicative of the unknown deviations for triggering said alarm and/or parking function.

Description

Improved monitoring method and apparatus

The present invention relates to a kind of method, it is used for monitoring: many mutual consequential signals have identical substantially profile, thereby be the same basically, and be used for dropout and/or be monitored signal occur one or more the unknowns and can not the situation of received deviation under trigger and report to the police and/or parking function, and be used for preventing the profile that is monitored signal occur one or more known and can the situation of received deviation under trigger and report to the police and/or parking function.The invention still further relates to a kind of equipment that is used to carry out this method.

In many cases, supervision is corresponding to for example all kinds machine, the various electric signal of the motion of the line in some looms for example, often some serious problems under cover are the spaces that can be accepted and plan to be ignored because some may occur in some continuous signals.Prevailing method for monitoring is to monitor not interrupting continuously of described each signal.And, to just determine position that one or more signals space occurs and be difficulty very in continuous signal very, because this or these space does not always appear on the same position in the described signal, but the appearance in this or these signal space has proved and will comply with in such as the classification of machine pattern, line, the factors such as quality of line.This has caused the extremely complicated adjustment and the problem of meticulous adjusting, and the adjustment after installing on a large scale.

The task of constituting basis of the present invention is, realizes a kind of method and a kind of equipment, is used to get rid of above-mentioned variety of issue and shortcoming, or will be relieved to them at least can received level.

This task is solved according to the present invention, and wherein the various characteristics key element that is endowed by place of matchmakers's disclosed method and apparatus has been stipulated in claims of the present invention.

Result as method according to the present invention and described equipment, to realize a kind of extremely simple ad hoc approach and a kind of extremely simple equipment, be used for the reliable and reliable supervision of a continuous signal, may occur variation naturally that some plans are ignored in the middle of this, and need not to make us advising the purpose difficulty for the meticulous adjusting of any sizable scope or adjustment attract.This be because, can be counted as a monitoring circuit that review one's lessons by oneself or self study according to described equipment of the present invention, it learns to plan the profile of the described signal that will be monitored during many machine cycles, because there is great possibility to suppose, described signal will have the same profile that was once had as it continuously between the so-called learning period.

Being used for knitting various product, for example showed special advantage in the machine of knitting socks according to this method of the present invention and this equipment.In this case, signal from the motion sensor of the line of each machine or each graph segments or yarn, finish all to be stored up to it at the beginning from this product or this figure, subsequently, the signal that the signal that detects and be monitored has just been stored with this compares.Can accomplish extremely remarkable and effective production quality control in this way, thereby this root line is not only in assurance, may be that these lines are all intact continuous in each circulation, and the batching of the figure of this product and line or yarn also be correct.

The present invention does very detailed explanation below with reference to appended each figure.Fig. 1 represents the block scheme according to an equipment of the present invention's making.Fig. 2 is the schematic drawing according to this equipment of the making of the present invention shown in Fig. 1.Fig. 3 shows the pulse diagram of the pulse train of taking from each measurement point that indicates in described block scheme and the described schematic drawing.Fig. 4 is the process flow diagram of a kind of practical application of the present invention.Fig. 5 is in order to the block scheme of implementation according to an embodiment of the practical application of Fig. 4.

To do detailed especially explanation to a embodiment with reference to the block scheme among Fig. 1, schematic drawing among Fig. 2 and the pulse diagram among Fig. 3 now according to a kind of method of the present invention and a kind of equipment.Be used for response, the motion that for example responds single line in the loom produces the sender unit of certain suitable pattern of an electric signal, and it is connected to one in order to amplify this signal and to make it on the digitized circuit A.This sender unit can be a piezoelectric type, but also can imagine the sender unit that uses other patterns, and this all is appropriate.This amplification and digitizer are connected on the blocking circuit B, and are connected to simultaneously on the AND gate 30.The output of this blocking circuit B is coupled on the AND gate 31, the latter's output then is coupled on a warning and/or the parking function flip-flop circuit C, circuit C can be a bistable multivibrator, or the impact circuit of certain appropriate pattern (shot circuit), and it can, for example in loom, under situation about occurring, cause sending a stop sign to this loom from the output signal of AND gate 31.

As having mentioned the front, from amplify and the signal of digitizer A in may occur normal, known and be acceptable signal space.But, it is on the same position just that these spaces always do not appear in the described signal, thereby is necessary to notify described monitoring circuit with various methodologies, it ignore this kind known, normal and be each signal space of acceptable.According to illustrated embodiments of the invention, a synchronizing pulse (hereinafter being referred to as the SYNC pulse) transmitter is connected to a circuit D that can think to be used to control the wave filter that synchronizing pulse exists, these synchronizing pulses show that described machine turns round, be connected to an AND gate 32, be connected to a counter circuit H and be connected to described flip-flop circuit C.Be coupled to the RESET input R of a counter circuit E from the signal of described filter D output, its Q output terminal is connected to described AND gate 32, an AND gate 33 and an electronic switch F.The output terminal of this AND gate 32 is connected to the clock pulse input terminal CL of described counter E, counter E is adjustable, before it sends an output signal from output terminal Q, operation always, counting from the synchronizing pulse of certain some of starting beginning.Described switch F is a so-called logic switch, an one input end is connected to the output terminal from AND gate 30, its another input end then is connected to the output terminal from a shift register G, and the output terminal of described switch F is connected on the input end D of this shift register G.The output terminal of this shift register G further is connected on the input end of each AND gate 30 and 33.In addition, the Q output terminal of described counter circuit E is connected on the input end of a "AND" circuit 34.The clock pulse input terminal of described shift register G is connected to the QL output terminal from counter H, each the RESET input of counter H is connected on the described synchronizing pulse transmitter, and its clock pulse input terminal CL then is connected on the clock signal generator I.The input end of this clock signal generator I is connected on the output terminal QH of described counter H, and is connected on the input end of described "AND" circuit 34.Be connected to the intermittence of described blocking circuit B on the input end from the output terminal of described AND gate 33.

The embodiment of the invention described above can be applied on a kind of like this loom of pattern suitably: in this loom, described line is pushed over shed open by a projectile shuttle, water-jet, air-spray or certain other media, and be booked at the other end of this shed open, be contracted a distance with that.Whether during this withdrawal action, detecting this line intact constantly is that we are desirable.In this case, cross as above mentioned, one or more signals space will occur in the described sender unit of this pattern that all changes in amplitude and position.As from will see significantly according to the schematic drawing of Fig. 2, the radio signal assessment circuit comprises a RC link or a loop between measurement point T1 and T2, using this capacitor is in described signal some variation can be arranged in order to permit, if yet that described variation becomes is too big, a signal will appear on the output terminal of described comparer, this signal is inverted, and further be fed to described AND gate 31 and bistable multivibrator C goes, with so that described machine stop.Under known and the situations some spaces of acceptable described machine is stopped in order to prevent from described signal to occur, a signal is fed to described blocking circuit B via described AND gate 33, the latter then will fill up in the signal of the described RC of flowing to link those known, normal and be the acceptable space so that described wherein capacitor will have no time to discharge and produce a signal of exporting to AND gate 31.Described signal from AND gate 33 is that the help by shift register G obtains.In the pulse diagram in Fig. 3, can seeing especially significantly, during initial eight machine cycles or synchronizing pulse, the place that a signal space in described signal, occurs, described shift register is in study, and cause producing a signal, in order to present to described blocking circuit B via AND gate 33 corresponding to this signal space.

In described counter circuit E, the machine cycles number is set, and learn in the place that occurs a signal space or a plurality of signals space for described shift register G in described signal T1, and this is considered to necessary.Counter H determines the shift intervals of shift register G.During each synchronizing pulse 1-8, counter circuit E keeps described switch F in position shown in Fig. 1, wherein all influence from the signal of AND gate 30 outputs from the signal of circuit A with from the signal of shift register G, so described shift register is all taken each T1 signal that all occur during the 1-8 synchronizing pulse in front into account.In the 9th synchronizing pulse, counter circuit E will switch F throw with position opposite shown in Fig. 1 on.After this, shift register G just has been considered to learn the arrangement and the profile of the signal that will monitor.Again, will arrive in the described machine always and cutoff command occurs, the content of this shift register just can be affected, so a new learning phase can begin.Even it is continuous that described T1 signal is shown as on the pulse diagram according to Fig. 3, still can't stop naturally surpassing between illustrated discontinuous or each synchronizing pulse of interrupting, occur therein that some are known and be useful additional interrupts.It can be the termination of described signal that a kind of such additional interrupts is arranged, and in some applications, monitors that perhaps described signal finishes at same position is desirable in each machine cycles.

The described arrangement of signal and the profile that therefore has of being monitored, can be owing to the quality of different lines and owing to different machines changes, and the line of different colours can provide different signal profiles, because this reason, usually install the equipment of the sort of pattern of the line of a line that is used for each kind recited above and each color in the machine weaving of multiple color.

In addition, as shown in Figures 4 and 5, one embodiment of the present of invention can be applied to knitting different types product, for example machine of stockings and socks.Included every single line all disposes a transmitter, and the latter is working with the electric signal of the motion that sends relevant line always.Therefore, transmitter of described machine installing, it always in work producing an electric signal or mark pulse (" FLAG " that refer in particular in the Figure 4 and 5), and its line motion detection cycle in being defined in during the machine cycles, the latter also can be a graph segments or the knitting circulation of refering in particular to.The term machine cycles also can be used to refer to machine run one circle.The knitting product of wanting comprises knitting action of many circles or graph segments, and they form this product and figure thereof jointly.Described machine comprises that also a continuous job goes into operation in order to produce relevant each part product, and thereby is a relevant electric signal or synchronizing pulse (" SYNC " in the Figure 4 and 5) that new figure begins.

Electronics connection layout shown in Figure 5 is self-evident for the professional and technical personnel in principle, and for the skilled reader of this instructions, makes to put into practice and become possibility being used for equipment in knitting in-flight monitoring stockings or socks manufacturing.So Fig. 5 shows hardware components, Fig. 4 then illustrates software section or is used for the process flow diagram of this software section, and this is for the professional and technical personnel, also puts into practice easily according to the method for common acceptance.

Hardware components according to Fig. 5 comprises many integrated circuit 1-11, and they all are in the market can be available.Integrated circuit (IC) 3 is microcomputers, and it relies on a program that is stored in the integrated circuit (IC) 9 to control, and this integrated circuit (IC) 9 is ROM (read-only memory), wherein includes the necessary program of described circuit function.Integrated circuit (IC) 8 is one and deposits or memory circuit.Integrated circuit (IC) 10 is A/D converters, and integrated circuit (IC) 2 then is an imput output circuit.Integrated circuit (IC) 7 is the battery backup circuit that are provided with for register circuit IC8, and integrated circuit subelement IC4, IC5 and IC6 then constitute translator unit.In addition, each symbol in the described connection layout all is the general type of being accepted.Switch S 1 is connected to input and output IC circuit 2, is used to insert described equipment, and inserts from mode of learning or learning state.In addition, have a reset button " RESET " to be connected on the IC2 circuit, after the startup, this button always makes each electronic circuit and described program recovery to reference position.Also inserted a sensor circuit " SENS " herein, it receives the mark pulse of determining the time cycle, and in this cycle, the motion of line will all be detected in each graph segments or machine cycles.In addition, a circuit unit " SYNC " is connected on the input and output IC circuit 2, is used to import the synchronizing pulse that every product goes into operation.Also have many light emitting diode LD1-LD4 to be connected on the described input and output IC circuit 2, be respectively applied for the existence of Warning Mark pulse, synchronizing pulse, check total CHK and mode of learning.There are two relay R E1 and RE2 also to be connected on the input and output IC circuit 2 again.Under the situation of the signal that triggering warning and/or parking function occur, described relay R E1 causes the sender unit of pilot lamp or other patterns luminous, and relay R E2 then makes described machine stop.

All motor message transmitters that are included in the line in the described machine all are connected on the A/D converter IC10, as can seeing significantly, all transmitters all are the electric current sender type, thereby the line in motion when detecting each time is many more, the electric current that enters described A/D converter will be big more, the digital signal of coming out from this A/D converter then will be more little, and this digital signal will be an output signal 255 when not importing sender signal.Utilize integrated circuit (IC) 11 and potentiometer P1, the sensitivity of each sender unit can be conditioned.

As starting point, we illustrate the operator scheme of foregoing circuit the process flow diagram among Fig. 4.Just not saying this main flow from " START " (starting) to " STOP " (stopping), or next graph segments, also has " INTERRUPT " (interruption) flow process, this flow process is prescribed and will moves according to this deliberate hope of learning phase, and the latter begins according to depressing per second time of the switch S among described current switch or Fig. 51.How described learning phase carries out in described main flow is conspicuous.When electric current has been switched on, and many initial connection inspections have been performed, and this equipment is just being waited for a synchronizing pulse, and it is exactly enabling pulse itself.

In case synchronizing pulse occurs, and has introduced graph segments O and just has been determined.Under check total is correct situation,, all to inquire no matter what will carry out is a learning phase or a normal detection-phase.At one is new product fully, before for example socks go into operation, always must carry out a learning phase naturally, and in this stage, light emitting diode LD4 illuminates.No matter described equipment is among its mode of learning or detecting pattern (light emitting diode LD4 extinguishes during the latter), described equipment is all waited for a mark pulse that has caused graph segments 1 beginning and CLR zero clearing, described register circuit or memory circuit IC8(computer circuits) by zero padding.As long as a mark pulse is arranged,, for example be read out in 100 microseconds just in the very short time interval from the signal of A/D converter IC10, these readings then are stored or are deposited with among the memory circuit IC8.When described mark pulse disappears and this graph segments and machine cycles when being done, carrying out the average magnitude of reading during this mark pulse is calculated, and, if described equipment is to be in the mode of learning (LEARN), this as a result mean value just deposited.On the other hand, if described equipment is to be in the detecting pattern, the value that so such mean value is as a result stored during will a learning phase with the described signal in previous this graph segments under consideration compares.If the deviation of difference between the mean value that obtains during the detecting operation and described value of having stored is not more than certain predetermined units, described equipment promptly forwards next graph segments to.If but this diversity ratio is bigger, will produce a signal that triggers warning or parking function, make relay R E1 and RE2 excitation thus.After one whole the product or one whole socks finished through upchecking, deposit or memory circuit IC8 in a signal value that is used for each graph segments will be arranged, will coexist in being in detecting pattern (SENSE) time mean value of the detected signal that calculated under the normal operation situation of the latter compares.

Though what Fig. 4 represented is, just be transformed into mode of learning automatically if described check total is incorrect, it is difficult in most of the cases carrying out an automatic mode of learning operation.If described check total is incorrect, this should cause a signal that triggers warning and/or parking function.In principle, the operation of all modes of learning all must be monitored, and the product of finishing subsequently also must be tested before being performed being transformed into detecting pattern.

Moving a learning phase or mode of learning, and after the product of such production of having upchecked, each signal that is used for each graph segments just is stored in to be deposited or memory circuit IC8, and described machine just can put into operation some skies, some weeks or several months for making same product, does not need to replenish a new learning phase.

Like this, in each graph segments, just can comprise any line or yarn of giving determined number, and be various types of lines or yarn, because each graph segments of described Equipment Inspection, and whether the motion of finding out detected line during manufacturing operation provides a signal in existing graph segments, and the latter has obtained with socks of making the so-called standard socks or the first time or the socks of producing during learning phase in advance together.Because, in each machine cycles or each graph segments, all there is the detecting operation of a myriad of to be implemented, and because it is in order to the mean value with all detections of comparing of signal of storage in advance, so some deviation in this signal allows, can not cause therefore that machine stops.

Relevant when reading with above-mentioned practical application of the present invention, in the time of claims of the present invention, the many mutual consequential signals of used term will be understood that, be from the signal in each mutual continuous product of identical graph segments, yet when described each graph segments is the same, and the signal of each respective graphical section of being deposited is the same substantially, perhaps their mutual difference and be not more than the described predetermined units that is allowed between signal and the detected signal depositing, that is the mean value that many times detects identical signal that calculates, therefore they can be meant in described same product so, each signal from several mutual consequential graph segments.

Claims (7)

1, a kind of method, be used for monitoring: many mutual consequential signals have identical substantially profile, thereby be the same basically, and be used for dropout and/or be monitored signal occur one or more the unknowns and can not the situation of received deviation under trigger and report to the police and/or parking function, and be used for preventing occurring triggering under one or more known and the situations acceptable deviation reporting to the police and/or parking function in the profile that is monitored signal, the described signal that is monitored is digitized, be fed to an intermittence and comparator circuit thereafter, in order to produce the output signal of each unknown deviation of indication, so that trigger described warning and/or parking function, it is characterized in that, the described signal that is monitored is fed to a register circuit, be used to deposit the profile of described signal, the latter is made of many binary digits (bit) later in digitizing, and a corresponding signal is presented to described intermittence and comparator circuit, so that each known deviation in this digitized signal can be accepted,, described intermittence and comparator circuit send an output signal that triggers warning and/or parking function thereby only responding described each unknown deviation that is monitored in the signal; During a preset time cycle, the described digital value that is monitored signal is deposited many times; After described preset time period expires, the described mean value that is monitored signal is used to compare with the described value that is monitored signal of being deposited at first and be expectation; And if the difference between the described mean value and the value of being deposited at first surpasses a predetermined units, intermittence and comparator circuit just produce a signal and trigger and report to the police and/or parking function so.

2, as desired method in the claim 1, it is characterized in that, the described preset time cycle is corresponding to a part that is a machine cycles in the knitting machine at least, and described machine cycles is corresponding to a kind of knit product or be used for a knitting circulation in the middle of the graph segments of described figure of this knit product; Those signals that appear in all machine cycles and will be monitored corresponding to the motion of yarn or line, under the situation that a so-called standardized product goes into operation, or it is initial on first graph segments of this standardized product, and finish this standardized product or its last graph segments later on during the learning phase of termination, each all is deposited in the described register circuit in their memory paragraph.

3, as desired method in the claim 2, it is characterized in that, in corresponding to described intermittence and comparator circuit after each machine cycles of a graph segments, make described register circuit from the mean value of stored number of bits during corresponding to the described machine cycles that is monitored signal, deduct number of bits corresponding to stored and described each graph segments; And if the result of described subtraction surpasses a predetermined units, so described intermittence and comparator circuit just produce an output signal and are used for triggering warning and/or parking function.

4, for carrying out a kind of equipment of the method for any one in every as described above claim, this equipment comprises: many sender units are connected to one to carry out on the digitized circuit (A), the latter is connected to a signal evaluation circuit and a circuit (C) that triggers warning and/or parking function successively by intermittence and comparator circuit (B) again, it is characterized in that, a register circuit (G), it also is connected on described intermittence and the comparator circuit (B), so that applying one after the stage at a signal learning on described gap and comparator circuit (B) is used for being monitored signal (Tl) relatively with described, and compensate each signal known and can received deviation, thereby described blocking circuit (B) is prevented or stopped that flip-flop circuit (C) sends one and reports to the police and/or stop sign.

5, as proposed in the claim 4, be used at knitting a kind of product, for example monitor the equipment of the motion of described line or yarn in the process of socks, wherein be included in the transmitter that line in the described product or yarn all are equipped with them, the latter is moving with the motion that produces line of response and/or the signal of line tension always, it is characterized in that one is used to produce corresponding to the electric signal of first graph segments of described product or the transmitter of synchronizing pulse; One is used in each graph segments, thereby produces an electric signal or mark pulse in each machine cycles, and corresponding to the transmitter of a sense cycle in each graph segments and the machine cycles; And one comprise described depositing or the central location of memory circuit and described intermittence and comparator circuit.

6, as the equipment that is proposed in the claim 5, it is characterized in that, a switch is set to be used for changing between learning phase and detection-phase, and this switch is connected to described intermittence and comparator circuit goes, be used for during described learning phase, stoping and report to the police and/or parking function, digital quantity from the signal of described each sender unit is deposited in the described memory circuit in each graph segments in during this period, compare with the mean value that is monitored signal so that after described detection-phase, be used for, if difference surpasses a predetermined units, so just be used to produce a signal that triggers warning and/or parking function.

7, the equipment as being proposed in the claim 6, it is characterized in that, a reset switch is connected on described central location and described intermittence and the comparator circuit, is used to face a product and after having triggered warning and/or parking function described each electronic circuit is transformed into initial position and gets on.

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