CN203933477U - Noise-reducing paper shredder circuit - Google Patents
Noise-reducing paper shredder circuit Download PDFInfo
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- CN203933477U CN203933477U CN201420228303.4U CN201420228303U CN203933477U CN 203933477 U CN203933477 U CN 203933477U CN 201420228303 U CN201420228303 U CN 201420228303U CN 203933477 U CN203933477 U CN 203933477U
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- 238000001514 detection method Methods 0.000 claims abstract description 27
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 230000001276 controlling effect Effects 0.000 claims abstract description 15
- 239000003990 capacitor Substances 0.000 claims description 89
- 238000013021 overheating Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 abstract description 2
- 239000000123 paper Substances 0.000 description 79
- 230000002457 bidirectional effect Effects 0.000 description 20
- 230000000875 corresponding effect Effects 0.000 description 16
- 230000010363 phase shift Effects 0.000 description 6
- 238000001914 filtration Methods 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000011087 paperboard Substances 0.000 description 2
- 230000009993 protective function Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
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Abstract
The utility model relates to noise-reducing paper shredder circuit.The utility model solves the excessive problem of prior art noise, its technical scheme main points are: a kind of noise-reducing paper shredder circuit, also comprise motor power circuit, optocoupler, power of motor regulating circuit, zero cross detection circuit, control power supply and paper inlet paper feed sensor circuit, motor power circuit is electrically connected with motor positive inversion control circuit by power of motor regulating circuit, power of motor regulating circuit is electrically connected with control chip by optocoupler, motor power circuit is electrically connected with control chip by zero cross detection circuit, motor power circuit is electrically connected with control chip by controlling power supply, control chip is also electrically connected with paper inlet paper feed sensor circuit, paper inlet paper feed sensor circuit is by controlling power circuit power supply.Use equipment of the present utility model and method, machine noise is lower.
Description
Technical field
The utility model belongs to shredder technology, relates to a kind of noise-reducing paper shredder circuit.
Background technology
The circuit that on market, shredder product uses is now all that mains supply is through switch, shredded paper motor is carried out to break-make job control, power supply direct or rectification supply motor after switch when work, while work, switch disconnects, motor is not powered and is shut down, now, no matter motor is in idle running or with different load operation, voltage on motor always equals supply voltage, motor rotating speed in the time of idle running is very high, noise is very large, and in the time of bringing onto load, along with load increases, rotating speed can be more and more slower, noise when the sound of shredder can compare paper in the time of idle running is large, and noise on the contrary can be little when shredded paper.This is unmodifiable defect in the time using machine operation running, so the shredder using now or other same other products that uses machine operation have this problem, and uses this Intelligent noise reduction circuit just can overcome this problem.
China Patent Publication No.: CN101422751A, open day of patent: on May 6th, 2009, disclose a kind of shredder, comprised control unit, for controlling the shredded paper operation of described shredder; It is characterized in that, also comprise: entrance sensing unit, connect described control unit, under it is controlled, record described shredder porch and treat the number of times that comminution of material enters; Identification unit, connects described control unit, records operator's identity information under it is controlled; Memory cell, connects described control unit, for storing pulverizing number of times that described entrance sensing unit obtains and the identity information of corresponding described identification unit record with it.But noise when this technical scheme still exists the sound of shredder to compare paper in when idle running is large, and noise on the contrary can be little when shredded paper, the problem that noise is excessive.
Utility model content
The utility model has solved the excessive problem of prior art noise, and a kind of noise-reducing paper shredder circuit is provided.
The utility model solves the technical scheme that its technical problem adopts: a kind of noise-reducing paper shredder circuit, comprise control chip, motor overheating testing circuit, motor current detecting circuit, motor positive inversion control circuit and motor, described motor overheating testing circuit is electrically connected with control chip, motor positive inversion control circuit is by detecting grounding through resistance, described motor current detecting circuit one end is electrically connected with detection resistance, the motor current detecting circuit other end is electrically connected with control chip, control chip is electrically connected with motor by motor positive inversion control circuit, also comprise motor power circuit, optocoupler, power of motor regulating circuit, zero cross detection circuit, control power supply and paper inlet paper feed sensor circuit, motor power circuit is electrically connected with motor positive inversion control circuit by power of motor regulating circuit, power of motor regulating circuit is electrically connected with control chip by optocoupler, motor power circuit is electrically connected with control chip by zero cross detection circuit, motor power circuit is electrically connected with control chip by controlling power supply, control chip is also electrically connected with paper inlet paper feed sensor circuit, paper inlet paper feed sensor circuit is by controlling power circuit power supply.
As preferably, described paper inlet paper feed sensor circuit comprises luminous tube LD1, phototriode TD1, resistance R 5, resistance R 6 and capacitor C 7, control power supply by the anodic bonding of resistance R 5 and luminous tube LD1, the minus earth of luminous tube LD1, the collector electrode of phototriode TD1 is electrically connected with control power supply, the emitter of phototriode TD1 is by resistance R 6 ground connection, and the emitter of phototriode TD1 is by capacitor C 7 ground connection, and the emitter of phototriode TD1 is also electrically connected with control chip.
As preferably, also comprise bucketful testing circuit, described bucketful testing circuit is electrically connected with described control chip.
As preferably, described bucketful testing circuit comprises luminous tube LD2, phototriode TD2, resistance R 201, resistance R 202, resistance R 203, resistance R 204, resistance R 205, resistance R 206, resistance R 7, resistance R 8, capacitor C 201, capacitor C 202, capacitor C 203, capacitor C 204 and capacitor C 205, control power supply respectively with resistance R 206 first ends, resistance R 203 first ends, resistance R 202 first ends, the anodic bonding of capacitor C 202 first ends and capacitor C 201, the second end of resistance R 206 is connected with control chip, the second end of resistance R 206 is connected with the collector electrode of triode Q201, the emitter of triode Q201 is by resistance R 205 ground connection, the emitter of triode Q201 also with the anodic bonding of capacitor C 205, the minus earth of capacitor C 205, the base stage of triode Q201 is connected with the second end of resistance R 203, the base stage of triode Q201 is also connected with the collector electrode of phototriode TD2 by capacitor C 204, the base stage of triode Q201 is by resistance R 204 ground connection, resistance R 202 second ends are connected with the collector electrode of phototriode TD2, the grounded emitter of phototriode TD2, the second end of capacitor C 202 and the minus earth of capacitor C 201, also ground connection of the negative electrode of light-emitting diode LD2, the anode of diode LD2 is electrically connected with control chip by resistance R 201 and resistance R 8 successively, the anode of diode LD2 is successively by resistance R 21 and capacitor C 203 ground connection, controlling power supply is electrically connected with control chip by resistance R 7, controlling power supply is electrically connected with the collector electrode of triode Q201 by resistance R 7.
As preferably, also comprise LED display circuit and overheating detection circuit, described LED display circuit and overheating detection circuit are all electrically connected with described control chip.
As preferably, described zero cross detection circuit comprises diode D7, resistance R 15, resistance R 16, resistance R 17, resistance R 18, triode Q3 and capacitor C 11, the anode of diode D7 is electrically connected with motor power circuit, the negative electrode of diode D7 is by resistance R 15, resistance R 16 is electrically connected with the base stage of triode Q3, the grounded emitter of triode Q3, capacitor C 11 one end are electrically connected with the base stage of triode Q3, capacitor C 11 other end ground connection, the base stage of triode Q3 is by resistance R 17 ground connection, the collector electrode of triode Q3 is electrically connected with control power supply by resistance R 18, the collector electrode of triode Q3 is also electrically connected with control chip.
As preferably, described power of motor regulating circuit comprises resistance R 31, capacitor C 13, double-thyristor TR1 and resistance R 24, the input of double-thyristor TR1 is electrically connected with motor power circuit, the output of double-thyristor TR1 is electrically connected with the first input end of motor positive inversion control circuit, the output of double-thyristor TR1 is also electrically connected with the input of double-thyristor TR1 by resistance R 31 and capacitor C 13, the input of double-thyristor TR1 is connected with the second conduction terminal of optocoupler by capacitor C 13, the control end of double-thyristor TR1 is connected optocoupler with the first conduction terminal of optocoupler the first control end by resistance R 24 is electrically connected with control power supply, the first control end of optocoupler is electrically connected with control chip, the second input of motor positive inversion control circuit is electrically connected with motor current detecting circuit, the output of motor positive inversion control circuit is electrically connected with motor.
As preferably, motor current detecting circuit comprises detection resistance R 32, resistance R 19, diode D6, resistance R 21, resistance R 22, capacitor C 9, capacitor C 10, capacitor C 14, resistance R 23, resistance R 28, resistance R 29, resistance R 30, the second input of described motor positive inversion control circuit is electrically connected with motor power circuit by detecting resistance R 32, the second input of motor positive inversion control circuit is the anode with diode D6 by resistance R 19, the negative electrode of diode D6 is by capacitor C 9 ground connection, the negative electrode of diode D6 is connected with the first end of resistance R 21, the second end of resistance R 21 is respectively by resistance R 22 and capacitor C 10 ground connection, the second end of resistance R 21 is connected with the first end of resistance R 23, the second end connection of resistance R 23 is electrically connected with control chip, the second end of resistance R 23 is by capacitor C 14 ground connection, the second end of resistance R 23 is electrically connected with control power supply by resistance R 30 and resistance R 28 successively, the second end of resistance R 23 is electrically connected with control chip, the second end of resistance R 23 is connected with the first end of resistance R 29 by resistance R 30, the second end of resistance R 29 is electrically connected with control chip, the second end of resistance R 29 is also electrically connected with control chip and ground connection.
The utility model arranges like this, resistance R 32 is serially connected in rectification circuit, electric current by motor is all back in power supply by resistance R 32, the both end voltage of resistance R 32 is fallen along with the increase of current of electric and is increased, by resistance R 19, the rectifying and wave-filtering of diode D6 and capacitor C 9, (adjust input maximum voltage regulated by resistance R 21 and resistance R 22), the current parameters that motor operation is provided to control chip through resistance R 23 is also the watt level that detects motor operation.Intelligent noise reduction specific works is that control chip is divided into corresponding a lot of gear according to the minimum current of machine operation and maximum current, control chip according to the difference of gear export different signals by optocoupler to bidirectional thyristor, by regulating the angle of flow of bidirectional thyristor (double-thyristor) to control the current time that passes through of motor, thereby control power input to a machine.When civil power zero passage, detect zero cross signal by zero cross signal, in the time that control chip detection pin PA3 detects zero cross signal, after time delay certain hour, control chip output pin PA2 output low level, make optocoupler conducting then trigger bidirectional thyristor TR1, the delay time that zero passage and chip output Continuity signal detected is longer, bidirectional thyristor phase shift Trigger Angle is larger, bidirectional thyristor ON time in the half period of civil power is shorter, the operating voltage of motor is lower, the electric current passing through is fewer, and the rotating speed of motor can be lower, and the noise of machine is less.In the time that machine paper inlet has just been put paper, control chip senses paper, control chip detects after civil power zero passage, start bidirectional thyristor Trigger Angle (the minimum current shelves of corresponding machine operation) with the longest delay time, motor operating voltage is minimum, the electric current passing through in half period is minimum, and motor speed is minimum, and noise is very little.In the time that the tatter amount of machine shredded paper increases, if the power that motor is now inputted is constant, motor speed will decline so, do not reach the rate request of shredded paper, can be more and more slower, but the voltage drop meeting of the resistance R 32 that now motor current detecting circuit can detect is increased, entering after chip this magnitude of voltage can the ready-portioned current gear scope of corresponding control chip, control chip is exported the fixing bidirectional thyristor phase shift triggered time according to corresponding current value, delay time is shortened, bidirectional thyristor ON time in the half period of civil power is elongated, the operating voltage of motor raises, the electric current passing through increases, the corresponding input power of motor increases, although the shredded paper of machine increases, but now power input to a machine will increase, make rotating speed still be stabilized in original scope.In the time that load is maximum, current detection circuit can detect voltage max, corresponding current maximum gear, and bidirectional thyristor phase shift triggered time minimum, the corresponding input power maximum of motor, machine shredded paper velocity-stabilization is constant.So no matter how motor load changes, motor current detecting circuit all can detect the voltage of following variation, chip all can be exported a standard delay time, makes power input to machine increase or reduce, and speed reaches a stationary value.When current of electric continues to increase, while exceeding the maximum gear of electric current, control chip output pin is closed, and motor is quit work, and protection blade for shredding paper and structural failure make LED overload light bright simultaneously, reminds user to note.The overheat protective function of machine is for using thermistor colligation on motor; in the time of machine operation; motor temperature raises; 5V voltage is varied with temperature by R25 and resistance and the thermistor dividing potential drop that changes; after capacitor C 12 filtering, offer control chip PA1 pin motor overheating signal, in the time that temperature reaches protection temperature; control chip, to bidirectional thyristor and cut-off signal, quits work motor.The full paper measuring ability of the dustbin of machine is to send pulse signal by control chip to be input on the infrared emission tube that bucketful detects, in the time that dustbin paper is full, the infrared ray of transmitting tube is reflected back on infrared receiver tube by the paper of bucketful, receiving tube signal offers control chip after being amplified by triode Q201 after capacitor C 204, due to the existence of capacitor C 204, can only be the fixed pulse signal that transmitting tube sends by its signal, control chip also only detects that sort signal just thinks the full signal of paper of dustbin, other extraneous no pulse infrared signal cannot pass through C204, or signal does not meet and can not be considered to the full signal of paper yet, control chip can not move, effectively avoid extraneous interference.Paper inlet paper feed inducing function enters paper receiving tube while being normal and receives transmitting tube signal, think that paper inlet do not put into paper, machine can not turn round, in the time having paper to put into, paper has blocked transmitting tube to the light of receiving tube, receiving tube does not receive signal, and control chip has sensed that paper puts into, the shredded paper of starting working.After broken complete paper, there is no paper and can quit work.LED be shown as when machine in overheated or paper mostly broken while not descend paperboard motor overheating or current overload lamp light respectively, prompting user notes.
Substantial effect of the present utility model is: the purpose of this utility model is to provide a kind of Intelligent noise reduction circuit that can automatically regulate the rotating speed of motor according to tatter amount size, and the sound of shredder operation is reduced, and reduces working environment noise.
Brief description of the drawings
Fig. 1 a kind of circuit theory schematic diagram of the present utility model;
Fig. 2 is a kind of circuit theory schematic diagram of bucketful testing circuit in the utility model;
Fig. 3 is a kind of circuit theory schematic diagram of paper inlet paper feed sensor circuit in the utility model.
Embodiment
Below by specific embodiment, the technical solution of the utility model is described in further detail.
Embodiment:
A kind of noise-reducing paper shredder circuit (referring to accompanying drawing 1 Fig. 2 and Fig. 3), comprise control chip, motor overheating testing circuit, motor current detecting circuit, motor positive inversion control circuit and motor, described motor overheating testing circuit is electrically connected with control chip, motor positive inversion control circuit is by detecting grounding through resistance, described motor current detecting circuit one end is electrically connected with detection resistance, the motor current detecting circuit other end is electrically connected with control chip, control chip is electrically connected with motor by motor positive inversion control circuit, it is characterized in that: also comprise motor power circuit, optocoupler, power of motor regulating circuit, zero cross detection circuit, control power supply and paper inlet paper feed sensor circuit, motor power circuit is electrically connected with motor positive inversion control circuit by power of motor regulating circuit, power of motor regulating circuit is electrically connected with control chip by optocoupler, motor power circuit is electrically connected with control chip by zero cross detection circuit, motor power circuit is electrically connected with control chip by controlling power supply, control chip is also electrically connected with paper inlet paper feed sensor circuit, paper inlet paper feed sensor circuit is by controlling power circuit power supply.Described paper inlet paper feed sensor circuit comprises luminous tube LD1, phototriode TD1, resistance R 5, resistance R 6 and capacitor C 7, control power supply by the anodic bonding of resistance R 5 and luminous tube LD1, the minus earth of luminous tube LD1, the collector electrode of phototriode TD1 is electrically connected with control power supply, the emitter of phototriode TD1 is by resistance R 6 ground connection, the emitter of phototriode TD1 is by capacitor C 7 ground connection, and the emitter of phototriode TD1 is also electrically connected with control chip.Also comprise bucketful testing circuit, described bucketful testing circuit is electrically connected with described control chip.Described bucketful testing circuit comprises luminous tube LD2, phototriode TD2, resistance R 201, resistance R 202, resistance R 203, resistance R 204, resistance R 205, resistance R 206, resistance R 7, resistance R 8, capacitor C 201, capacitor C 202, capacitor C 203, capacitor C 204 and capacitor C 205, control power supply respectively with resistance R 206 first ends, resistance R 203 first ends, resistance R 202 first ends, the anodic bonding of capacitor C 202 first ends and capacitor C 201, the second end of resistance R 206 is connected with control chip, the second end of resistance R 206 is connected with the collector electrode of triode Q201, the emitter of triode Q201 is by resistance R 205 ground connection, the emitter of triode Q201 also with the anodic bonding of capacitor C 205, the minus earth of capacitor C 205, the base stage of triode Q201 is connected with the second end of resistance R 203, the base stage of triode Q201 is also connected with the collector electrode of phototriode TD2 by capacitor C 204, the base stage of triode Q201 is by resistance R 204 ground connection, resistance R 202 second ends are connected with the collector electrode of phototriode TD2, the grounded emitter of phototriode TD2, the second end of capacitor C 202 and the minus earth of capacitor C 201, also ground connection of the negative electrode of light-emitting diode LD2, the anode of diode LD2 is electrically connected with control chip by resistance R 201 and resistance R 8 successively, the anode of diode LD2 is successively by resistance R 201 and capacitor C 203 ground connection, controlling power supply is electrically connected with control chip by resistance R 7, controlling power supply is electrically connected with the collector electrode of triode Q201 by resistance R 7.Also comprise LED display circuit and overheating detection circuit, described LED display circuit and overheating detection circuit are all electrically connected with described control chip.Described zero cross detection circuit comprises diode D7, resistance R 15, resistance R 16, resistance R 17, resistance R 18, triode Q3 and capacitor C 11, the anode of diode D7 is electrically connected with motor power circuit, the negative electrode of diode D7 is by resistance R 15, resistance R 16 is electrically connected with the base stage of triode Q3, the grounded emitter of triode Q3, capacitor C 11 one end are electrically connected with the base stage of triode Q3, capacitor C 11 other end ground connection, the base stage of triode Q3 is by resistance R 17 ground connection, the collector electrode of triode Q3 is electrically connected with control power supply by resistance R 18, the collector electrode of triode Q3 is also electrically connected with control chip.Described power of motor regulating circuit comprises resistance R 31, capacitor C 13, double-thyristor TR1 and resistance R 24, the input of double-thyristor TR1 is electrically connected with motor power circuit, the output of double-thyristor TR1 is electrically connected with the first input end of motor positive inversion control circuit, the output of double-thyristor TR1 is also electrically connected with the input of double-thyristor TR1 by resistance R 31 and capacitor C 13, the input of double-thyristor TR1 is connected with the second conduction terminal of optocoupler by capacitor C 13, the control end of double-thyristor TR1 is connected optocoupler with the first conduction terminal of optocoupler the first control end by resistance R 24 is electrically connected with control power supply, the first control end of optocoupler is electrically connected with control chip, the second input of motor positive inversion control circuit is electrically connected with motor current detecting circuit, the output of motor positive inversion control circuit is electrically connected with motor.Motor current detecting circuit comprises detection resistance R 32, resistance R 19, diode D6, resistance R 21, resistance R 22, capacitor C 9, capacitor C 10, capacitor C 14, resistance R 23, resistance R 28, resistance R 29, resistance R 30, the second input of described motor positive inversion control circuit is electrically connected with motor power circuit by detecting resistance R 32, the second input of motor positive inversion control circuit is the anode with diode D6 by resistance R 29, the negative electrode of diode D6 is by capacitor C 9 ground connection, the negative electrode of diode D6 is connected with the first end of resistance R 21, the second end of resistance R 21 is respectively by resistance R 22 and capacitor C 10 ground connection, the second end of resistance R 21 is connected with the first end of resistance R 23, the second end connection of resistance R 23 is electrically connected with control chip, the second end of resistance R 23 is by capacitor C 14 ground connection, the second end of resistance R 23 is electrically connected with control power supply by resistance R 30 and resistance R 28 successively, the second end of resistance R 23 is electrically connected with control chip, the second end of resistance R 23 is connected with the first end of resistance R 29 by resistance R 30, the second end of resistance R 29 is electrically connected with control chip, the second end of resistance R 29 is also electrically connected with control chip and ground connection.
The present embodiment arranges like this, resistance R 32 is serially connected in rectification circuit, electric current by motor is all back in power supply by resistance R 32, the both end voltage of resistance R 32 is fallen along with the increase of current of electric and is increased, by resistance R 19, the rectifying and wave-filtering of diode D6 and capacitor C 9, (adjust input maximum voltage regulated by resistance R 21 and resistance R 22), the current parameters that motor operation is provided to control chip through resistance R 23 is also the watt level that detects motor operation.Intelligent noise reduction specific works is that control chip is divided into corresponding a lot of gear according to the minimum current of machine operation and maximum current, control chip according to the difference of gear export different signals by optocoupler to bidirectional thyristor, by regulating the angle of flow of bidirectional thyristor (double-thyristor) to control the current time that passes through of motor, thereby control power input to a machine.When civil power zero passage, detect zero cross signal by zero cross signal, in the time that control chip detection pin PA3 detects zero cross signal, after time delay certain hour, control chip output pin PA2 output low level, make optocoupler conducting then trigger bidirectional thyristor TR1, the delay time that zero passage and chip output Continuity signal detected is longer, bidirectional thyristor phase shift Trigger Angle is larger, bidirectional thyristor ON time in the half period of civil power is shorter, the operating voltage of motor is lower, the electric current passing through is fewer, and the rotating speed of motor can be lower, and the noise of machine is less.In the time that machine paper inlet has just been put paper, control chip senses paper, control chip detects after civil power zero passage, start bidirectional thyristor Trigger Angle (the minimum current shelves of corresponding machine operation) with the longest delay time, motor operating voltage is minimum, the electric current passing through in half period is minimum, and motor speed is minimum, and noise is very little.In the time that the tatter amount of machine shredded paper increases, if the power that motor is now inputted is constant, motor speed will decline so, do not reach the rate request of shredded paper, can be more and more slower, but the voltage drop meeting of the resistance R 32 that now motor current detecting circuit can detect is increased, entering after chip this magnitude of voltage can the ready-portioned current gear scope of corresponding control chip, control chip is exported the fixing bidirectional thyristor phase shift triggered time according to corresponding current value, delay time is shortened, bidirectional thyristor ON time in the half period of civil power is elongated, the operating voltage of motor raises, the electric current passing through increases, the corresponding input power of motor increases, although the shredded paper of machine increases, but now power input to a machine will increase, make rotating speed still be stabilized in original scope.In the time that load is maximum, current detection circuit can detect voltage max, corresponding current maximum gear, and bidirectional thyristor phase shift triggered time minimum, the corresponding input power maximum of motor, machine shredded paper velocity-stabilization is constant.So no matter how motor load changes, motor current detecting circuit all can detect the voltage of following variation, chip all can be exported a standard delay time, makes power input to machine increase or reduce, and speed reaches a stationary value.When current of electric continues to increase, while exceeding the maximum gear of electric current, control chip output pin is closed, and motor is quit work, and protection blade for shredding paper and structural failure make LED overload light bright simultaneously, reminds user to note.The overheat protective function of machine is for using thermistor colligation on motor; in the time of machine operation; motor temperature raises; 5V voltage is varied with temperature by R25 and resistance and the thermistor dividing potential drop that changes; after capacitor C 12 filtering, offer control chip PA1 pin motor overheating signal, in the time that temperature reaches protection temperature; control chip, to bidirectional thyristor and cut-off signal, quits work motor.The full paper measuring ability of the dustbin of machine is to send pulse signal by control chip to be input on the infrared emission tube that bucketful detects, in the time that dustbin paper is full, the infrared ray of transmitting tube is reflected back on infrared receiver tube by the paper of bucketful, receiving tube signal offers control chip after being amplified by triode Q201 after capacitor C 204, due to the existence of capacitor C 204, can only be the fixed pulse signal that transmitting tube sends by its signal, control chip also only detects that sort signal just thinks the full signal of paper of dustbin, other extraneous no pulse infrared signal cannot pass through C204, or signal does not meet and can not be considered to the full signal of paper yet, control chip can not move, effectively avoid extraneous interference.Paper inlet paper feed inducing function enters paper receiving tube while being normal and receives transmitting tube signal, think that paper inlet do not put into paper, machine can not turn round, in the time having paper to put into, paper has blocked transmitting tube to the light of receiving tube, receiving tube does not receive signal, and control chip has sensed that paper puts into, the shredded paper of starting working.After broken complete paper, there is no paper and can quit work.LED be shown as when machine in overheated or paper mostly broken while not descend paperboard motor overheating or current overload lamp light respectively, prompting user notes.
Above control chip also can adopt various triggers to replace, in single-chip microcomputer, the setting of threshold value part can adopt potentiometer to coordinate trigger to reach corresponding effect, because this type of replacement belongs to those skilled in the art's routine techniques means, also be that a kind of difference is selected scheme, in the utility model, do not repeat.
Above-described embodiment is preferably scheme of one of the present utility model, not the utility model is done to any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim records.
Claims (8)
1. a noise-reducing paper shredder circuit, comprise control chip, motor overheating testing circuit, motor current detecting circuit, motor positive inversion control circuit and motor, described motor overheating testing circuit is electrically connected with control chip, motor positive inversion control circuit is by detecting grounding through resistance, described motor current detecting circuit one end is electrically connected with detection resistance, the motor current detecting circuit other end is electrically connected with control chip, control chip is electrically connected with motor by motor positive inversion control circuit, it is characterized in that: also comprise motor power circuit, optocoupler, power of motor regulating circuit, zero cross detection circuit, control power supply and paper inlet paper feed sensor circuit, motor power circuit is electrically connected with motor positive inversion control circuit by power of motor regulating circuit, power of motor regulating circuit is electrically connected with control chip by optocoupler, motor power circuit is electrically connected with control chip by zero cross detection circuit, motor power circuit is electrically connected with control chip by controlling power supply, control chip is also electrically connected with paper inlet paper feed sensor circuit, paper inlet paper feed sensor circuit is by controlling power circuit power supply.
2. noise-reducing paper shredder circuit according to claim 1, it is characterized in that: described paper inlet paper feed sensor circuit comprises luminous tube LD1, phototriode TD1, resistance R 5, resistance R 6 and capacitor C 7, control power supply by the anodic bonding of resistance R 5 and luminous tube LD1, the minus earth of luminous tube LD1, the collector electrode of phototriode TD1 is electrically connected with control power supply, the emitter of phototriode TD1 is by resistance R 6 ground connection, the emitter of phototriode TD1 is by capacitor C 7 ground connection, and the emitter of phototriode TD1 is also electrically connected with control chip.
3. noise-reducing paper shredder circuit according to claim 1, is characterized in that: also comprise bucketful testing circuit, described bucketful testing circuit is electrically connected with described control chip.
4. noise-reducing paper shredder circuit according to claim 3, is characterized in that: described bucketful testing circuit comprises luminous tube LD2, phototriode TD2, resistance R 201, resistance R 202, resistance R 203, resistance R 204, resistance R 205, resistance R 206, resistance R 7, resistance R 8, capacitor C 201, capacitor C 202, capacitor C 23, capacitor C 204 and capacitor C 205, control power supply respectively with resistance R 206 first ends, resistance R 203 first ends, resistance R 202 first ends, the anodic bonding of capacitor C 202 first ends and capacitor C 201, the second end of resistance R 206 is connected with control chip, the second end of resistance R 206 is connected with the collector electrode of triode Q201, the emitter of triode Q201 is by resistance R 205 ground connection, the emitter of triode Q201 also with the anodic bonding of capacitor C 205, the minus earth of capacitor C 205, the base stage of triode Q201 is connected with the second end of resistance R 203, the base stage of triode Q201 is also connected with the collector electrode of phototriode TD2 by capacitor C 204, the base stage of triode Q201 is by resistance R 204 ground connection, resistance R 202 second ends are connected with the collector electrode of phototriode TD2, the grounded emitter of phototriode TD2, the second end of capacitor C 202 and the minus earth of capacitor C 201, also ground connection of the negative electrode of light-emitting diode LD2, the anode of diode LD2 is electrically connected with control chip by resistance R 201 and resistance R 8 successively, the anode of diode LD2 is successively by resistance R 201 and capacitor C 203 ground connection, controlling power supply is electrically connected with control chip by resistance R 7, controlling power supply is electrically connected with the collector electrode of triode Q201 by resistance R 7.
5. noise-reducing paper shredder circuit according to claim 1, is characterized in that: also comprise LED display circuit and overheating detection circuit, described LED display circuit and overheating detection circuit are all electrically connected with described control chip.
6. noise-reducing paper shredder circuit according to claim 1, it is characterized in that: described zero cross detection circuit comprises diode D7, resistance R 15, resistance R 16, resistance R 17, resistance R 18, triode Q3 and capacitor C 11, the anode of diode D7 is electrically connected with motor power circuit, the negative electrode of diode D7 is by resistance R 15, resistance R 16 is electrically connected with the base stage of triode Q3, the grounded emitter of triode Q3, capacitor C 11 one end are electrically connected with the base stage of triode Q3, capacitor C 11 other end ground connection, the base stage of triode Q3 is by resistance R 17 ground connection, the collector electrode of triode Q3 is electrically connected with control power supply by resistance R 18, the collector electrode of triode Q3 is also electrically connected with control chip.
7. noise-reducing paper shredder circuit according to claim 6, it is characterized in that: described power of motor regulating circuit comprises resistance R 31, capacitor C 13, double-thyristor TR1 and resistance R 24, the input of double-thyristor T R1 is electrically connected with motor power circuit, the output of double-thyristor TR1 is electrically connected with the first input end of motor positive inversion control circuit, the output of double-thyristor TR1 is also electrically connected with the input of double-thyristor TR1 by resistance R 31 and capacitor C 13, the input of double-thyristor TR1 is connected with the second conduction terminal of optocoupler by capacitor C 13, the control end of double-thyristor TR1 is connected optocoupler with the first conduction terminal of optocoupler the first control end by resistance R 24 is electrically connected with control power supply, the first control end of optocoupler is electrically connected with control chip, the second input of motor positive inversion control circuit is electrically connected with motor current detecting circuit, the output of motor positive inversion control circuit is electrically connected with motor.
8. noise-reducing paper shredder circuit according to claim 7, it is characterized in that: motor current detecting circuit comprises detection resistance R 32, resistance R 19, diode D6, resistance R 21, resistance R 22, capacitor C 9, capacitor C 10, capacitor C 14, resistance R 23, resistance R 28, resistance R 29, resistance R 30, the second input of described motor positive inversion control circuit is electrically connected with motor power circuit by detecting resistance R 32, the second input of motor positive inversion control circuit is the anode with diode D6 by resistance R 19, the negative electrode of diode D6 is by capacitor C 9 ground connection, the negative electrode of diode D6 is connected with the first end of resistance R 21, the second end of resistance R 21 is respectively by resistance R 22 and capacitor C 10 ground connection, the second end of resistance R 21 is connected with the first end of resistance R 23, the second end connection of resistance R 23 is electrically connected with control chip, the second end of resistance R 23 is by capacitor C 14 ground connection, the second end of resistance R 23 is electrically connected with control power supply by resistance R 30 and resistance R 28 successively, the second end of resistance R 23 is electrically connected with control chip, the second end of resistance R 23 is connected with the first end of resistance R 29 by resistance R 30, the second end of resistance R 29 is electrically connected with control chip, the second end of resistance R 29 is also electrically connected with control chip and ground connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420228303.4U CN203933477U (en) | 2014-05-06 | 2014-05-06 | Noise-reducing paper shredder circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420228303.4U CN203933477U (en) | 2014-05-06 | 2014-05-06 | Noise-reducing paper shredder circuit |
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| CN203933477U true CN203933477U (en) | 2014-11-05 |
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| CN201420228303.4U Expired - Fee Related CN203933477U (en) | 2014-05-06 | 2014-05-06 | Noise-reducing paper shredder circuit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113244A (en) * | 2014-05-06 | 2014-10-22 | 宁波王兴工艺品有限公司 | Noise-reduction shredder circuit and control method |
| CN105536943A (en) * | 2015-12-24 | 2016-05-04 | 山东理工大学 | Point connection type swelling detection device of compound tube mill and pre-swelling regulation and control method |
| CN108388189A (en) * | 2018-05-03 | 2018-08-10 | 广东新宝电器股份有限公司 | Control method and control circuit of food processor and food processor |
-
2014
- 2014-05-06 CN CN201420228303.4U patent/CN203933477U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113244A (en) * | 2014-05-06 | 2014-10-22 | 宁波王兴工艺品有限公司 | Noise-reduction shredder circuit and control method |
| CN105536943A (en) * | 2015-12-24 | 2016-05-04 | 山东理工大学 | Point connection type swelling detection device of compound tube mill and pre-swelling regulation and control method |
| CN108388189A (en) * | 2018-05-03 | 2018-08-10 | 广东新宝电器股份有限公司 | Control method and control circuit of food processor and food processor |
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Granted publication date: 20141105 Termination date: 20180506 |