CN2808954Y - Yarn feeding device with photoelectric detection function - Google Patents
Yarn feeding device with photoelectric detection function Download PDFInfo
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- CN2808954Y CN2808954Y CN 200520012996 CN200520012996U CN2808954Y CN 2808954 Y CN2808954 Y CN 2808954Y CN 200520012996 CN200520012996 CN 200520012996 CN 200520012996 U CN200520012996 U CN 200520012996U CN 2808954 Y CN2808954 Y CN 2808954Y
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- yarn
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Abstract
The utility model relates to a yarn feeding device with a photoelectric detection function, which comprises a motor which is controlled by a control circuit, and a yarn storage device (1) and detectors (3, 4) which are driven by the motor, wherein the detectors (3, 4) face a scanned area provided by the surface of the yarn storage device (1) and are connected with the control circuit. The control circuit at least comprises a difference amplifier (U3) and a central processing circuit (C) which can control and drive the motor to start and stop. At least two detectors (3, 4) are arranged side by side from top to bottom, and the output ends of the detectors (3, 4) are respectively connected with the corresponding input ends of the difference amplifier (U3) by the respective signal amplifiers (U1, U2). The output end of the difference amplifier (U3) is connected with the corresponding input end of the central processing circuit (C). Compared with the prior art, the utility model directly compares the detection signal of the detectors to obtain the target outputting signal, intuitively judges whether the surface of the yarn storage device has yarn or not according to the value of the target outputting signal and effectively avoids the interference to the detection caused by the dirt on the surface of the yarn storage device. The detection result is accurate, the operation is easy and the specific implementation is convenient and fast.
Description
Technical field
The utility model relates to the technical field of yarn-feeding device in the knitting machine, especially a kind of yarn-feeding device with photoelectric detection function.
Background technology
Yarn-feeding device is the vitals in the knitting machine, and it mainly includes motor-driven yarn storage device.In recent years, fast development and widespread usage along with circular knitting machine, can its yarn-feeding device in quick operation, all the time the yarn supply that guarantees its yarn storage device surface has yarn, perhaps in time point out the yarn supply on this yarn storage device surface whether to lack yarn, so that automatic or manual timely yarn feeding, be this large circle machine of decision one of the key factor of woven fabric quality.And whether the yarn storage device surface of artificial inspection yarn-feeding device has yarn, will improve production cost greatly, require great effort very much, and in case to manage yarn-feeding device quantity simultaneously more, the probability of making a fault will increase, and can't guarantee the quality of fabric then, thereby, along with the high speed development of industrial automation, manual detection is substituted by intelligent automatic detection device gradually.
At present, whether the existing many yarn supplies that can judge the yarn storage device surface automatically have the yarn-feeding device of yarn, as the patent No. is the Chinese invention patent " in the method for the control period monitor scans condition of Yarn supply device " of ZL96199474.6, it discloses a kind of yarn-feeding device that adopts photoelectric detecting method, it comprises the motor by control circuit control, by this motor-driven yarn storage device and detector, wherein, detector links to each other with control circuit, and the scanning area that this detector provides towards this yarn storage device surface, and the motion of response target in scanning area or have or not and produce the target output signal, this target output signal depends on the quality of the condition of scanning, simultaneously, provide a synchronous test signal according to this target output signal, by the control circuit that links to each other with this detector, the signal level of this test signal is compared with a given alarm threshold value, this alarm threshold value representative is the variation of the acceptable condition of scanning just, also be, what just can determine to exist on the scanning area is not yarn, but the dirt that need clear up, and when the signal level of this test signal is lower than the alarm threshold value, control circuit produces an alarm signal, notify the workman in time to clear up, perhaps directly controlling a cleaning device cleans out the dirt on yarn storage device surface, and when the signal level of this test signal is higher than the alarm threshold value, just judge on this scanning area to have yarn.
Adopt the yarn-feeding device of this photoelectric detecting method, need to determine in advance an alarm threshold value, and it must just can determine to exist on the scanning area is not yarn, but the dirt that need clear up, fixed too high of this alarm threshold value, then can judge into dirt to yarn, and send wrong alarm signal, allow the people think that the yarn storage device surface has dirt to clear up, waste of manpower resource so greatly is unsuitable for production application, if what this alarm signal drove is a cleaning device, then its probability that maloperation takes place can increase greatly, and fixed low excessively of this alarm threshold value then can be judged resultant yarn to dirt, will replenish yarn to yarn storage device timely like this, and directly influence the quality of fabric, so determining of this alarm threshold value is very crucial.But in actual production process, suitable many of existing yarn variety, and constantly have again during new yarn comes into operation.For different yarns, the quality of its optoelectronic scanning condition is different, thereby make that the target output signal of detector output also can be different, like this, with respect to different yarns, its alarm threshold value can be slightly different, for example, and for cotton and real silk yarn, both alarm threshold values should be that the former is greater than the latter, so if for real silk yarn, its alarm threshold value is given is alarm threshold value for cotton, then, the target output signal level of detector output is lower, and it is made comparisons with the higher alarm threshold value for cotton, and control circuit can be exported the signal that lacks yarn all the time so, so this alarm threshold value can't uniquely be decided again accurately, and its numerical value needs artificial careful calculating and test again and obtains, unusual trouble, and be difficult to again calculate accurately.Therefore, the method that the prior given alarm threshold value of the target output signal of detector and is made comparisons, in actual applications, for different yarns, whether its detection yarn storage device surface has the testing result of yarn is not the accurate of ten minutes, and specifically implement neither be very easy, is unsuitable for production application.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of Photoelectric Detection result and comparatively accurately, specifically implements very convenient, as the to be more suitable for production application yarn-feeding device with photoelectric detection function.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: this has the yarn-feeding device of photoelectric detection function, it comprises the motor by control circuit control, by this motor-driven yarn storage device and detector, wherein, the scanning area that described detector provides towards this yarn storage device surface, and described detector links to each other with control circuit, it is characterized in that: described control circuit comprises a difference amplifier at least and can control the central processing circuit that drives described motor stall, described detector is provided with two and be positioned at diverse location at least, their output directly or through signal amplifier separately connects the corresponding input of described difference amplifier respectively, and the output of difference amplifier then connects the corresponding input of described central processing circuit.
Wherein, described detector response having or not of yarn and produce the target output signal that is used to control purpose in described scanning area, this target output signal depends on the difference of at least two detected signals of described detector, also be, at least one described detector is compared by described control circuit its detection signal and is drawn difference with the detection signal of other detectors, thereby makes described control circuit produce described target output signal.
If in the scanning area on yarn storage device surface yarn is arranged, at least one described detector scans target and produces detection signal so, the difference of the detection signal that does not scan target with other detectors and produce is non-vanishing, also be, the target output signal of described its generation of control circuit is non-vanishing, so just represent that there is yarn on this yarn storage device surface, just need not start by the motor of this target output signal control; Otherwise, if do not have yarn in the scanning area on yarn storage device surface, the difference of so all its detection signals of described detector all is zero, also be, the target output signal of described its generation of control circuit is zero, so just represents that this yarn storage device surface lacks yarn, just can control motor in the yarn-feeding device by this target output signal, make its running and replenish yarn on the yarn storage device timely, till described detector detects yarn.
In production application, the yarn storage device surface can be glued unavoidably and be affixed dust, will reduce the light transmission quality of detector like this, directly have influence on the detection signal of detector, and then influence the target output signal of control circuit output, influence the accuracy of testing result, so described detector can be arranged in juxtaposition up and down, like this, though the light transmission quality of a plurality of detectors descends, but it is synchronous decline, do not compare and the target output signal that draws so do not influence it, so, adopt the testing result of this method not to be subjected to the influence of yarn storage device surface contaminants, be very suitable for practical application.
Generally, detector needs a control signal that starts its work, also promptly only when yarn-feeding device operates, ability open detection device, and at present, yarn storage device top in described yarn-feeding device generally also is provided with presses the yarn ring, so, can press on the yarn ring at this magnet is set, and be provided with Hall element with the corresponding position of this magnet, and this Hall element is controlled the unlatching of described detector, like this, magnet is along with pressing the running of yarn ring, and when Hall element is sensed magnet, will produce the signal of a variation, this signal is just opened described detector.
Because of this detector must be towards the yarn storage device surface, and yarn storage device generally is positioned at the motor below, for ease of producing assembling, described motor periphery can be arranged with casing, and described casing is extended with bracing frame downwards, described detector just is installed on this bracing frame, and like this, detector is fixed near the yarn storage device with regard to firm.
Compared with prior art, advantage of the present utility model is: draw the target output signal by the detection signal of detector is directly compared, judge intuitively in the scanning area that the yarn storage device surface provides according to the numerical value of this target output signal whether yarn is arranged, need not to compare with artificial given numerical value, testing result is very directly perceived, accurately, and specifically implement also suitable convenient; A plurality of detectors are arranged in juxtaposition up and down, and the interference of effectively having avoided the dirt on yarn storage device surface to bring to test does not influence its testing result, be very suitable for practical application, and structure is also very simple; The utility model structure is provided with simply, and easy and simple to handle, testing result is accurate, is more suitable for production application.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of detector among Fig. 1, Hall element, yarn storage device surface and pressure yarn ring;
Fig. 3 is the circuit diagram of control circuit among the utility model embodiment;
Fig. 4 is the calcspar of control circuit.
The specific embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As Fig. 1～shown in Figure 3, this has the yarn-feeding device of photoelectric detection function, and it comprises by the motor (not expressing among the figure) of control circuit control, by this motor-driven yarn storage device 1 and two detectors 3 (T1), 4 (T2);
Wherein, described motor outer race is provided with casing 2, and casing 2 is extended with bracing frame 21 downwards, and described detector 3 (T1), 4 (T2) just are installed on this bracing frame 21 up and down side by side;
Also be provided with pressure yarn ring 5 on the top of described yarn storage device 1, this pressure yarn ring 5 is provided with magnet 6, and on bracing frame 21, be provided with Hall element 7 (H) with these magnet 6 corresponding positions, and the unlatching of this Hall element 7 (H) control described detector 3 (T1), 4 (T2);
The scanning area that described detector 3 (T1), 4 (T2) provide towards this yarn storage device 1 surface, and just being wrapped in the scanning area on this yarn storage device 1 surface in order to the yarn of supplying with, and detector 3 (T1), 4 (T2) link to each other with control circuit;
Described control circuit comprises a difference amplifier U3 and can control the central processing circuit C that drives described motor stall, and the output of two detectors 3 (T1), 4 (T2) connects the corresponding input of described difference amplifier U3 respectively by signal amplifier U1 and U2, the output of difference amplifier U3 then connects the corresponding input of central processing circuit C, and Hall element 7 (H) is controlled the unlatching of detector 3 (T1), 4 (T2) by central processing circuit C, referring to Fig. 3;
When actual operation, press yarn ring 5 with yarn storage device 1 rotation, Hall element 7 (H) one is sensed and is pressed magnet 6 on the yarn ring 5, the signal that just changes, then open described detector 3 (T1), 4 (T2), detector 3 (T1), 4 (T2) respond having or not of yarn in described scanning area and produce the target output signal that is used to control purpose, the target output signal then depends on two detectors 3 (T1), the difference of the detected signal of 4 (T2), also be, two detectors 3 (T1), 4 (T2) have received (if the detector detector 3 (T1) of the corresponding input of difference amplifier U3 in the control circuit to its detection signal respectively by output, the detection signal of 4 (T2) is strong inadequately), the output of difference amplifier U3 then can be exported that two detectors 3 (T1), the difference of the detection signal of 4 (T2), this difference promptly is the target output signal that control circuit produces, this target output signal then is input to central processing circuit C, thereby controls the stall of described motor;
If in the scanning area on yarn storage device 1 surface yarn is arranged, a detector 3 (T1) scans target and produces detection signal so, the difference of the detection signal that does not scan target with another detector 4 (T2) and produce is non-vanishing, also be, described target output signal is non-vanishing, so just represent that there is yarn on this yarn storage device 1 surface, just stopped operating by the motor of this target output signal control; Otherwise, if do not have yarn in the scanning area on yarn storage device 1 surface, the difference of two detectors 3 (T1), 4 (T2) its detection signal all is zero so, also be, described target output signal is zero, so just represents that this yarn storage device 1 surface lacks yarn, just controls motor by this target output signal and central processing circuit C, make its running and replenish yarn on the yarn storage device 1 timely, till detector 3 (T1), 4 (T2) detect yarn again;
Through motor-driven, after yarn storage device 1 surface has replenished yarn, detector 3 (T1), 4 (T2) will shut down motor by control circuit, and when yarn storage device 1 lip-deep yarn is little by little consumed by loom, because motor is running not, just can not be according to when starting shooting, utilize the mode of Hall element 7 (H) induced magnet 6 to come open detection device 3 (T1), 4 (T2) work, at this moment just need described control circuit oneself automatic detection regularly, also be, at described detector 3 (T1), after 4 (T2) open, control circuit is periodically handled detector 3 (T1), the detection signal that 4 (T2) obtain judges that with the method that regularly detects scanning area has or not yarn.
As shown in Figure 4, the control circuit that has two above detectors to detect, the output of its all detectors is all received the corresponding input of difference amplifier, amplify through difference, the target output signal is outputed to central processing circuit, thereby judge that yarn storage device 1 surface has or not yarn, Hall element is then controlled the unlatching of central processing circuit and then control detector.
Claims (5)
1, a kind of yarn-feeding device with photoelectric detection function, it comprises the motor by control circuit control, by this motor-driven yarn storage device (1) and detector (3,4), wherein, described detector (3,4) scanning area that provides towards this yarn storage device (1) surface, and described detector (3,4) link to each other with control circuit, it is characterized in that: described control circuit comprises a difference amplifier (U3) at least and can control the central processing circuit (C) that drives described motor stall, described detector (3,4) be provided with two and be positioned at diverse location at least, their output is directly or through separately signal amplifier (U1, U2) connect the corresponding input of described difference amplifier (U3) respectively, the output of difference amplifier (U3) then connects the corresponding input of described central processing circuit (C).
2, the yarn-feeding device with photoelectric detection function according to claim 1 is characterized in that: described detector (3,4) is for being arranged in juxtaposition up and down.
3, the yarn-feeding device with photoelectric detection function according to claim 1 and 2, it is characterized in that: also be provided with on the top of described yarn storage device (1) and press yarn ring (5), this pressure yarn ring (5) is provided with magnet (6), and is being provided with Hall element (7) with the corresponding position of this magnet (6).
4, the yarn-feeding device with photoelectric detection function according to claim 1 and 2, it is characterized in that: described motor outer race is provided with casing 2), and described casing (2) is extended with bracing frame (21) downwards, and described detector (3,4) just is installed on this bracing frame (21).
5, the yarn-feeding device with photoelectric detection function according to claim 3, it is characterized in that: described motor outer race is provided with casing 2), and described casing (2) is extended with bracing frame (21) downwards, and described detector (3,4) just is installed on this bracing frame (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520012996 CN2808954Y (en) | 2005-07-01 | 2005-07-01 | Yarn feeding device with photoelectric detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520012996 CN2808954Y (en) | 2005-07-01 | 2005-07-01 | Yarn feeding device with photoelectric detection function |
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| Publication Number | Publication Date |
|---|---|
| CN2808954Y true CN2808954Y (en) | 2006-08-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520012996 Expired - Fee Related CN2808954Y (en) | 2005-07-01 | 2005-07-01 | Yarn feeding device with photoelectric detection function |
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| CN (1) | CN2808954Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677384A (en) * | 2012-06-08 | 2012-09-19 | 慈溪太阳洲纺织科技有限公司 | Yarn storage device |
| CN102965799A (en) * | 2012-12-21 | 2013-03-13 | 慈溪太阳洲纺织科技有限公司 | Weft accumulator |
-
2005
- 2005-07-01 CN CN 200520012996 patent/CN2808954Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677384A (en) * | 2012-06-08 | 2012-09-19 | 慈溪太阳洲纺织科技有限公司 | Yarn storage device |
| CN102965799A (en) * | 2012-12-21 | 2013-03-13 | 慈溪太阳洲纺织科技有限公司 | Weft accumulator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |