CN1974905B - Knitting machine - Google Patents
Knitting machine Download PDFInfo
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- CN1974905B CN1974905B CN2006101635159A CN200610163515A CN1974905B CN 1974905 B CN1974905 B CN 1974905B CN 2006101635159 A CN2006101635159 A CN 2006101635159A CN 200610163515 A CN200610163515 A CN 200610163515A CN 1974905 B CN1974905 B CN 1974905B
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Abstract
The invention relates to a method of connecting FET 12 to a winding 8 of an actuator of a knit machine. In this structure, a resistance R2 for detecting current is arranged, and comparators 32, 34 is used for supervising the peak value and the average value of the current wave, moreover, a comparator 36 is used for supervising that whether the current wave is below the level of line breaking. Furthermore, the waveforms of the clock signal and the data signal and the load pulse signal for controlling are supervised upon the foot of the FPGA 4. When any abnormity is detected, the reason will be recorded and displayed, at the same time, knit movement of the knit machine will be stopped. The fault and the fault reason of the knit machine can be detected together by the present invention.
Description
Technical field
The present invention relates to knitting machines such as straight-bar machines, circular knitting machine, warp knitting machine, socks and gloves knitting machine, particularly the abnormality detection of its pulse action load and control element.
Background technology
In knitting machines such as straight-bar machines, circular knitting machine, warp knitting machine, socks and gloves knitting machine, use needle selection actuator, barring-on slyder, eedle presser etc. to select actuator.Select on the actuator electromagnet to be set at these, its coil is carried out pulse control by control element.At this, needle selection actuator or selection actuator are generically and collectively referred to as the selection actuator.And fault and be the word of identical meanings unusually.In straight-bar machines, except that selecting actuator, also be used to control the maintenance solenoid etc. of the interlock of yarn feeder, control by control element equally.
If load short circuit because of fault of selection actuator etc., then overcurrent flow to the control element side, and secondary failure also takes place control element.And control element hinders for some reason and during short circuit, load-side is also because of overcurrent generation secondary failure.Therefore after secondary expansion unusually, and load and control element become unusually, be difficult to determine the reason of fault.
Summary of the invention
The objective of the invention is to, when the load of knitting machine or control element break down, can prevent that the fault secondary from enlarging, and definite failure cause.
Another purpose of the present invention is, detects the short circuit etc. of unusual and pin of the control IC of control control element.
Another purpose of the present invention is, when load or control element break down, can prevent reliably that the fault secondary from enlarging, and operator etc. can easily confirm failure cause.
The present invention is a kind of knitting machine, the Detection ﹠ Controling element connect and the load of pulse feature ground action unusually, it is characterized in that, be provided with: short-circuit detecting device, monitor flows detects the short circuit of load through the peak value of the electric current of described load when peak value surpasses first setting; Average detection device, monitor flows when mean value surpasses second setting, detect the unusual of control element through the mean value of the electric current of described load; And arresting stop, when short circuit that detects load or control element unusual, stop the action of load.
Preferably, also be provided with the device that the potential waveform to the output pin side of the control IC that is used to control described control element monitors, detect the unusual of control IC.
Preferably, above-mentioned arresting stop constitutes the power supply that cuts off load when unusual detecting, and described knitting machine also is provided with the device that is used for detecting output abnormality reason when unusual.
Preferably, described load is an actuator, and described control element carries out copped wave (chopper) control to this load.
Among the present invention, can discern unusually from load-side, still begin from the control element side, and can stop load by arresting stop when generation is unusual enlarges to prevent unusual secondary, enlarge owing to can prevent unusual secondary, thereby can determine that unusual reason is that load-side still is the control element side when maintenance etc.
If the potential waveform to the output pin side of the control IC that is used to control control element monitors, can also normally whether detect the short circuit of the unusual or output pin of IC inside according to the waveform of the pulse width of output signal etc.
If, then can prevent unusual expansion more reliably detecting the power supply that cuts off load when unusual.And detecting when unusual, to display, log file or the outputs such as LAN that are connected with knitting machine, then operator etc. can easily learn abnormal cause thus with abnormal cause.
The present invention is very important when electromagnet, solenoidal coil are used in load, if the coil load short circuit, then control element breaks down simply.Even the control element short circuit is provided for the also short circuit simply of coil of pulse action.Particularly by pulse copped wave when control carried out in load, because the pulse that load is connected is a plurality of, thereby control element is than easier the breaking down of maintenance solenoid that drives with pulse, and easily detects the peak value and the mean value of load current respectively.
Description of drawings
Fig. 1 is the block diagram of diagnostic device of actuator of the knitting machine of embodiment.
Fig. 2 is the block diagram of the current surveillance of variation with IC.
Fig. 3 is the oscillogram of the diagnostic device of Fig. 1,1) expression regeneration is with the waveform of the control signal En of FET, 2) expression selects the waveform of the control signal P of actuator, 3) expression flows through the waveform of the current i of current sense resistor R2.
Fig. 4 is the oscillogram of the diagnostic device of Fig. 1,1) waveform of the current i of current sense resistor R2,2 are flow through in expression) expression peak point current supervisory signal v1,3) expression average current supervisory signal v2,4) waveform of expression broken string supervisory signal v3.
Fig. 5 is the oscillogram of own diagnostic signal of control IC, 1) supervision of expression clock signal, the 2) supervision of expression data-signal, the 3) supervision of expression load pulse signal.
Fig. 6 is the control flow chart of embodiment, and expression is from detecting the unusual of controller, up to the processing that stops knitting machine and display abnormality reason.
The specific embodiment
Below most preferred embodiment of the present invention is implemented in explanation.
Expression embodiment and its distortion in Fig. 1～Fig. 6.In each figure, the 2nd, CPU is arranged in the controller of knitting machines such as straight-bar machines, circular knitting machine, warp knitting machine, control knitting machine integral body.The 4th, FPGA (field programmable gate array), the 6th, PLD (programmable logic device), the 8th, select the coil of actuator, be the coil that is used to select the actuator of the knitting needle of knitting machine or movable members such as barring-on slyder, eedle presser at this, particularly be these selection magnet spools.10, the 12nd, FET (field-effect transistor) also can be other mos transistor switch, bipolar transistor switches or repeater etc.D1 is that diode, R1 are resistance, is used to consume the electric power of coil 8 when FET10 disconnects.
Be provided with display part 16 and log files 18 such as troubleshooting portion 14, liquid crystal touch panel among the CPU2, when breaking down, the generation and the reason thereof that show fault at display part 16, be used to determine the data of the coil that breaks down, the reason (error code of fault at log file 18 record, the short circuit of coil, the short trouble of FET, broken string, FPGA's etc. is unusual, and the kind of anomalous signals takes place) and fault time on date of taking place etc.CPU2 is connected by buses such as PCI 20 with FPGA4, the 22nd, input interface, the 24th, the control signal generating unit of FPGA inside, control such as clocking, data-signal, load pulse signal signal, on their output pin, connect load pulse inspection portion 26, data-signal inspection portion 28 and clock signal inspection portion 30, to check load pulse signal, data-signal and clock signal.Kinds such as the anomaly detection signal that takes place at FPGA is called e4, and clock signal is unusual, data-signal is unusual, load pulse is unusual are documented among the anomaly detection signal e4.
R2 is a current detecting resistance, and when coil 8 short circuits, perhaps FET12 hinders and short circuit time restriction overcurrent for some reason, has the effect that delay fault enlarges, and the electric current that will flow through resistance R 2 is made as i.R3～R5 is a resistance, and C1～C3 is an electric capacity.Resistance R 3 and capacitor C 1, resistance R 4 and capacitor C 2, resistance R 5 and capacitor C 3 constitute integrating circuit respectively, and 32～36th, comparator uses integrating circuit (R3 at this, C1), (R5, C3), be because when FET12 connects, have dash current, avoid this electric current to form noise.In addition, the peak point current that is made of resistance R 3 and capacitor C 1 monitors and monitors little with integration circuit time constant with integration circuit time constant than the average current that is made of resistance R 4 and capacitor C 2.The output voltage of capacitor C1 is peak point current supervisory signal v1, is and the corresponding voltage of the peak value of current i, and the output voltage of capacitor C2 is average current supervisory signal v2, the signal of the dutycycle when being expression FET12 connection.The output voltage of capacitor C3 is broken string supervisory signal v3, and broken string supervisory signal v3 can replace with peak point current supervisory signal v1 or average current supervisory signal v2.
IC38 monitors the output of comparator 32～36, and ref1～ref3 is the comparison current potential of relatively device 32～36.IC38 is changed to disconnection by comparator 32 from connection, and output means the anomaly detection signal e1 of coil 8 short circuits.IC38 also is changed to disconnection by comparator 4 from connection, and output is the anomaly detection signal e2 of content with the short trouble of FET12.And then when comparator 36 became disconnection from connection, output was the anomaly detection signal e3 of content with the broken string of coil 8 grades., be arranged in the tripod balladeur train of not shown knitting machine to earth connection from power supply vcc, coil 8, resistance R 1, diode D1, FET10,12, be arranged on the controller side of knitting machine from the part of CPU2 to PLD6, from the part of resistance R 3～R5 to IC38.Anomaly detection signal e1～e3 feeds back to CPU2.
The CPU2 of Fig. 1 controls the various parts except that FPGA4, and FPGA4 controls the maintenance solenoid (by the solenoid of pulse action) of usefulness etc. with the interlock of control yarn feeders such as IC by other controls beyond the PLD.In addition, selection actuators such as needle selecting device, barring-on slyder or eedle presser at each knitting machine are provided with PLD6 respectively, the a plurality of electromagnet of operated by rotary motion on a selection actuator are for example by signal P ', P " other coils of the identical selection actuator of control.In addition, power Vcc is a dc source, can connect independently, disconnect by corresponding each selection actuator.
Fig. 2 represents the current surveillance IC40 of variation, utilize AD converter 42 couples of signal v1, v2 to carry out the AD conversion, use is at 3 comparative voltage ref1～ref3 of comparative voltage storage part 44 storages, peak point current supervisory signal v1 and comparative voltage ref1 are made comparisons, average current supervisory signal v2 and comparative voltage ref2 are made comparisons, signal v2 is also used as the broken string supervisory signal, itself and comparative voltage ref3 are compared.In the time of will correctly detecting the having or not of broken string, can utilize synchronous this situation of variation of on/off that in current i, produces with FET12.Therefore, in the case, for example can detection signal v2 whether with the on/off of FET12 synchronously with the amplitude variations more than the comparative voltage ref3.If detect the fault (short circuit) of FET 12 of short circuit, control usefulness of the coil 8 of selecting actuator and the broken string etc. of selecting the coil 8 etc. of actuator in comparing section 46, then can be with this result from interface (I/F) 48 as above-mentioned anomaly detection signal e1～e3 output.
In the IC40 of Fig. 2, can read in signal in the moment of regulation.Therefore, read in the voltage that reads in resistance R 2 constantly, just can not need integrating circuit by change.For example signal P is imported the IC40 from FPGA4, PLD6, signal P is used for the supervisory signal of peak value and the supervisory signal of broken string from the voltage that connection (ON) is changed near the moment of disconnection (OFF), when this voltage surpasses setting, the short circuit of coil 8 can be detected, less than setting the time, broken string can be detected.In addition, will disconnect the supervisory signal that is used for mean value after (OFF) through the signal after the stipulated time, the short trouble of when this signal further surpasses the miscellaneous stipulations value, taking FET12 as.
The action waveforms of representing embodiment at Fig. 3～Fig. 5.Fig. 3 1) the control signal En of expression FET, when making coil 8 action, En is changed to high level with control signal, makes FET10 connect (conducting).FET12 connects by control signal P pulse feature ground, when making coil 8 actions once select pin etc., controls with copped wave by a plurality of pulses and to select.The dutycycle of pulse signal P is according to variations such as the temperature of coil 8, environment temperatures.In addition, when utilizing two sections selection actuator selection pin, in second section selection actuator, the radical of the pin of having selected of Cun Zaiing changes on every side.At this, the permanent magnet attraction in the selected actuator of the pin of having selected selects the coil in the actuator to produce the magnetic flux that can offset permanent magnet attraction.Owing to flow in the pin of having selected from the magnetic flux of permanent magnet, thereby second section selected needed coil current value to change according to the radical of the pin of having selected in first section.The dutycycle of signal P is changed.Fig. 3 2) in solid line waveform represent the reference waveform of signal P, the waveform when dutycycle increases when dashdotted waveform is represented to start etc.Fig. 3 3) be the reference waveform that flows through the current i of resistance R 2, when connecting FET12, produce dash current.
Fig. 4 2) waveform of supervisory signal v1 of expression peak point current, solid line is represented waveform just often, the waveform when single-point line expression is unusual, comparative voltage ref1 is represented in double dot dash line.When coil 8 short circuits, for example because adhering to of the deposited or foreign conducting matter of the coiling in the coil 8 waits when being short-circuited, and the peak value of current i increases, produce thereupon as Fig. 4 2) the peak value higher signal v1 of single-point shown in ruling.Therefore, by this signal and comparative voltage ref1 are compared, can detect the short circuit of coil 8.
FET12 breaks down and during short circuit, average current supervisory signal v2 is as 3 of Fig. 4) the single-point line shown in, be roughly certain high value.Therefore, by itself and comparative voltage ref2 are compared, can detect the fault of FET12.When FET12 breaks down, nearly all be the situation of short circuit between source electrode and the drain electrode.And then when connecting FET12 and dutycycle and increasing, signal v2 is as 3) dotted line shown in change, if but comparative voltage ref2 is chosen as suitable value, the situation when dutycycle increases in the time of then can distinguishing the short circuit (dutycycle 100%) that detects FET12 with starting etc.Fig. 4 4) waveform of expression broken string supervisory signal v3, select comparative voltage ref3, make the minimum of a value of its signal v3 when producing broken string among coil 8, the FET12 etc. also little.Therefore, when wait to produce breaking around coil 8 or the FET12, signal v3 is lower than comparative voltage ref3 and can detects broken string.
Fig. 5 represents the unusual detection on the output pin of FPGA4, and zero mark is the rising or the decline of the signal of expression monitored object.The potential waveform of the output pin of watchdog timer signal detects at the appointed time the rising or the decline that whether have clock signal in the τ 1 at interval.For example make this time τ 1 be the time longer, then in during this period, should exist and rise or descend than 1/2 cycle of clock signal.Neither existing rises does not exist decline yet, and then the generating unit of clock signal or output pin are unusual.2) supervision of potential waveform of the output pin of expression data-signal detects after the rising of data-signal whether have decline in the stipulated time τ 2.2) in represent monitored object at 3 pulses with zero mark, but in fact pulse is thereafter also proceeded to monitor.And then, 2) in, owing to as high state effectively (active high) show thereby the decline of monitoring data signal, but effectively should detect rising under the situation of (active low) in low state.
Fig. 5 3) supervision of the potential waveform of the output pin of expression load pulse signal, PLD6 is by receiving the load pulse signal, and allows reading of data-signal.During the cam carrier of knitting machine weaves, in official hour τ 3, should there be the rising or the decline of load pulse signal.Therefore, check the unusual of load signal according to having or not of rising or decline.
And then when producing the short circuit of output pin of FPGA4, the current potential of pin is fixed as particular value.Therefore, if monitor the potential waveform of output pin, then when the output pin short circuit, also can detect unusual.The supervision of the potential waveform of output pin both can be carried out with the potential waveform of pin itself, also can monitor with the potential waveform of the distribution that is connected with pin.In addition, PLD6 is than the simple IC of FPGA4, and unusual major part occurs in the FPGA4 side, thereby monitors the potential waveform of the output pin of FPGA4 side.On the input pin of PLD6 side, be short-circuited etc. unusual the time, the abnormality detection of potential waveform that can be used as the output pin of FPGA4 side goes out.
Represent the diagnosis algorithm of the actuator of knitting machine at Fig. 6, the peak point current the during connection of FET12 detects the short circuit of the coil 8 of actuator when setting is above.When setting is above, detect the short trouble of FET at the mean value of the electric current that flows through the resistance R 2 that current surveillance uses.And then, when setting is following, detect the broken string of coil 8 at the minimum of voltage v3.In addition, detect the unusual of FPGA4 by anomaly detection signal e4.
For various abnormal causes, be recorded in the log file 18 determine to produce data, the abnormal cause (short circuit of coil, the fault of FET, broken string, the unusual error code that kind constituted of control element) of the data of the actuator of fault and coil thereof or definite FPGA4 and the time on date takes place unusually.In addition, by CPU2 or FPGA4 etc., relative coil 8 Vcc that cuts off the electricity supply stops to have the braid movement of the cam carrier that unusual coil 8 takes place.When knitting machine has a plurality of cam carrier, only stop to have the braid movement of the cam carrier that unusual coil 8, FET12 take place, proceed the braiding of other cam carriers.And then with the generation of fault with and reason be presented in the display 16, wait for maintenance.When being connected to knitting machine on the LAN, to the generation of LAN output abnormality and unusual reason.Braiding takes place will to stop unusually, be because for example during coil 8 short circuits the reason owing to overcurrent can then cause the FET12 fault, during the FET12 fault similarly the reason owing to overcurrent can then cause coil 8 short circuits.
Can obtain following effect in an embodiment.
(1) can determine the short circuit of the coil 8 of actuator, fault (short circuit), broken string and the control reason of the fault of IC4 that switch (FET12) is used in control, and detect unusual.
(2) by using peak point current supervisory signal v1, can detect the short circuit of the coil 8 of actuator reliably.
(3) by using average current supervisory signal v2, can detect the fault of switches such as FET12 reliably.Utilize peak point current supervisory signal v1 can not detect the fault of switches such as FET12, if utilize the short circuit of average current supervisory signal v2 magnetic test coil 8, the situation when then being difficult to coil 8 connections, dutycycle increase is distinguished.
(4) can detect the broken string of coil 8 and the broken string around the FET12 etc.
(5) can monitor that the internal abnormality of control IC4 and the short circuit of output pin etc. are unusual.
(6) resistance R 2 limiting short-circuit currents can be passed through, secondary expansion between coil 8 and FET12 unusually can be postponed.
Claims (5)
1. knitting machine, Detection ﹠ Controling element connect and the load of pulse feature ground action unusually, it is characterized in that, be provided with:
Short-circuit detecting device, monitor flows detect the short circuit of load through the peak value of the electric current of described load when peak value surpasses first setting;
Average detection device, monitor flows when mean value surpasses second setting, detect the unusual of control element through the mean value of the electric current of described load; With
Arresting stop when short circuit that detects load or control element unusual, stops the action of load.
2. knitting machine as claimed in claim 1 is characterized in that, also is provided with the device that the potential waveform to the output pin side of the control IC that is used to control described control element monitors, to detect the unusual of control IC.
3. knitting machine as claimed in claim 1 or 2 is characterized in that, described arresting stop constitutes the power supply that cuts off load when unusual detecting, and described knitting machine also is provided with the device that is used for detecting output abnormality reason when unusual.
4. knitting machine as claimed in claim 1 or 2 is characterized in that described load is an actuator, and described control element carries out copped wave control to this load.
5. knitting machine as claimed in claim 3 is characterized in that described load is an actuator, and described control element carries out copped wave control to this load.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-344124 | 2005-11-29 | ||
| JP2005344124A JP2007146336A (en) | 2005-11-29 | 2005-11-29 | Knitting machine |
| JP2005344124 | 2005-11-29 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1974905A CN1974905A (en) | 2007-06-06 |
| CN1974905B true CN1974905B (en) | 2011-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101635159A Active CN1974905B (en) | 2005-11-29 | 2006-11-29 | Knitting machine |
Country Status (2)
| Country | Link |
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| JP (1) | JP2007146336A (en) |
| CN (1) | CN1974905B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014052781A (en) * | 2012-09-06 | 2014-03-20 | Fujitsu Telecom Networks Ltd | Fpga monitoring control circuit |
| CN103995488A (en) * | 2014-05-28 | 2014-08-20 | 浙江理工大学 | Underwear machine jacquard closed loop control system and method |
| TWI718393B (en) * | 2018-07-18 | 2021-02-11 | 典洋針織機械股份有限公司 | Method for detecting knitting needle selection device and knitting needle selection device with detecting system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3321755A (en) * | 1963-06-14 | 1967-05-23 | Triplite Ltd | Stop means for textile machines |
| US3940954A (en) * | 1973-07-13 | 1976-03-02 | Billi S.P.A. | Electrical supervisory circuit arrangements |
| US4020655A (en) * | 1975-01-22 | 1977-05-03 | Centre Technique Industriel Dit: Institut Textile De France | Device for detecting defects in needles on a knitting loom which is in operation |
| US4509618A (en) * | 1981-03-03 | 1985-04-09 | Erich Roser | Oil lubrication system, especially for knitting machines |
| CN1465984A (en) * | 2002-06-14 | 2004-01-07 | 三菱电机株式会社 | Unusual detector for vehicle carried electric loading driving system |
| CN1482297A (en) * | 2002-08-12 | 2004-03-17 | 株式会社福原精机制作所 | Feeding control method and device for circular knitting machine |
| CN1545650A (en) * | 2002-02-04 | 2004-11-10 | 株式会社博世汽车系统 | Load failure diagnosis method and apparatus and load failure processing method and apparatus |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001003245A (en) * | 1999-06-16 | 2001-01-09 | Tsudakoma Corp | Linear motor control system for driving knitting member in knitting machine |
| JP2001032151A (en) * | 1999-07-15 | 2001-02-06 | Tsudakoma Corp | Method for driving movable sinker in flat knitting machine and flat knitting machine |
-
2005
- 2005-11-29 JP JP2005344124A patent/JP2007146336A/en active Pending
-
2006
- 2006-11-29 CN CN2006101635159A patent/CN1974905B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3321755A (en) * | 1963-06-14 | 1967-05-23 | Triplite Ltd | Stop means for textile machines |
| US3940954A (en) * | 1973-07-13 | 1976-03-02 | Billi S.P.A. | Electrical supervisory circuit arrangements |
| US4020655A (en) * | 1975-01-22 | 1977-05-03 | Centre Technique Industriel Dit: Institut Textile De France | Device for detecting defects in needles on a knitting loom which is in operation |
| US4509618A (en) * | 1981-03-03 | 1985-04-09 | Erich Roser | Oil lubrication system, especially for knitting machines |
| CN1545650A (en) * | 2002-02-04 | 2004-11-10 | 株式会社博世汽车系统 | Load failure diagnosis method and apparatus and load failure processing method and apparatus |
| CN1465984A (en) * | 2002-06-14 | 2004-01-07 | 三菱电机株式会社 | Unusual detector for vehicle carried electric loading driving system |
| CN1482297A (en) * | 2002-08-12 | 2004-03-17 | 株式会社福原精机制作所 | Feeding control method and device for circular knitting machine |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平6-158490A 1994.06.07 |
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| Publication number | Publication date |
|---|---|
| JP2007146336A (en) | 2007-06-14 |
| CN1974905A (en) | 2007-06-06 |
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