CN102716795B - Shredder control system based on permittivity - Google Patents

Abstract

The invention discloses a shredder control system based on permittivity. The touch stopping protective function is carried out through a series of electronic circuits, input signals and processing signals are received from the conductive touch panel of the paper inlet of the shredder, and the running of the movement of the shredder can be stopped by a motor driving circuit. The system includes a touch stopping detection circuit unit which further includes a touch-control control circuit to induct the conductive touch panel. The touch-control control circuit is configured to trigger the grounding switch circuit of the touch stopping detection circuit unit, and to output to a multifunctional safety touch stopping protective module. The safety touch stopping protective module performs the next protective function. The shredder touch stopping protective device prevents human being and other living beings such as pets from being injured through automatic and real-time monitoring. The whole controlling process is safe and accurate.

Description

Based on dielectric constant formula paper shredder control system

Technical field

The present invention relates to shredder technical field, the especially control device of shredder, particularly a kind of paper shredder control system.

Background technology

Automated office equipment increases sharply in the modern life and work, and wherein one of modal equipment is exactly shredder.At present, shredder, some of them with automatic safe sensor, are widely applied in family and commercial field.Paper inlet of paper shredder has a narrow gap, by its paper, is admitted to shredder reducing mechanism.Size can be limited by design in this narrow gap that enters paper passage, for preventing that user or the opposing party from contacting kneader bar accidentally, or prevents that by restriction opening exterior object from falling into protect kneader knife sheet devices.In routine operation, the paper crusher motor being connected on kneader bar starts, and kneader bar is relatively rotated, and pulverizes or shred material therebetween.Sensor can be arranged to detect and insert the object of paper inlet of paper shredder, and by making paper crusher motor switch on to start shredded paper operation, and is involved in this object and pulverizes by kneader bar.Shredder can keep "on" position and be ready to operation, unless it is switched off.Although the shredder being activated under standby mode is convenient,, may there is the risk that hurts people or other biological.For this reason, some advanced shredders may be used the multisensor security system of intelligent precise.Some current shredders not protection equipment prevent that unsuitable object or biological body part are strayed into shredder and enter paper passage, cause unacceptable potential safety hazard.In addition, shredder excessive enter paper As time goes on can cause machine performance not good, may shorten its operation lifetime.Some excessive enter paper detector be now mechanical realization, this depends on practicable design.

When excessive paper is pushed into paper inlet (" excessive enter paper "), may after broken opening, forms the paper piece of thickening, and may stop up into paper passage.If this paper number of blocks is abundant, may cause paper crusher motor overload, and make shredded paper operation stop (" obstruction ").Excessive enter paper and stop up two kinds of situations all disadvantageous stress is imposed to paper crusher motor and motor on the power transmission system of kneader bar.Stop up or excessive enter paper situation can impel operator attempt to clear up this obstruction or excessive enter paper, this has also improved the injury risk to operator.But, often high can not the accepting of cost of the complex appts of attempting to address this problem.Therefore need a kind of kneader paper inlet safety device, it improves user's security with lower cost.

Summary of the invention

The present invention, by providing a kind of based on dielectric constant formula paper shredder control system, utilizes the variation of paper inlet of paper shredder capacitance to solve above-mentioned shortcoming.This control procedure safety accurately.This circuit performance is stable, and can be widely used.In order to reach above-mentioned target, as follows for the dielectric constant sensor arrangement of shredder.

Describedly based on dielectric constant formula paper shredder control system, comprise functional module, power module, conduction touch panel and shredded paper mechanical part.Described functional module comprises touches stopping detecting circuit unit, and motor measurement of converse rotation circuit unit, enters paper testing circuit unit, overload protecting circuit unit, and safety is touched and is stopped protection module, and is provided with the functional switch of open and close and reverse three positions.Except functional switch, all unit in described functional module all can be directly connected to safety and touch and stop protection module, and described functional switch touches together with described safety and stops protection module and control motor drive circuit unit, and then control shredded paper mechanical part.

Described power module can comprise power interface switch, safety switch, and protective tube, gauge tap, safety is touched and is stopped protection module power supply and motor drive circuit unit.Power interface switch, safety switch, protective tube and gauge tap can be connected in series, and by functional switch control, are connected to motor drive circuit unit.Described gauge tap is relay switch.The described civil power protective tube of flowing through, through over commutation, filtering and voltage stabilizing provide direct current for all circuit units.

Described conduction touch panel can be connected to described tactile stopping detecting circuit unit.Described tactile stopping detecting circuit unit comprises touch-control control circuit and earthed switch circuit.Described touch-control control circuit can be the transistor circuit that comprises previous stage triode, and described touch panel is connected in the base stage of described previous stage triode by the first resistance.The base stage of described previous stage triode is by the parallel combination ground connection of the second resistance and the first capacitor.The emitter stage of described previous stage triode is by the parallel combination ground connection of the 3rd resistance and the second capacitor, and this emitter stage also accesses the input of described earthed switch circuit simultaneously.

The colelctor electrode parallel drive of described previous stage triode, then power supply indication light diode and tactile discontinuance show that light emitting diode accesses described power supply.Described earthed switch circuit is the switching transistor circuit that comprises rear one-level triode.The base stage of described rear one-level triode accesses the output of described touch-control control circuit, its grounded emitter, and its colelctor electrode accesses the tactile input that stops protection module of described safety by photo-coupler, and access described power supply by the 4th resistance.

Described enter paper testing circuit unit also access described safety and touch and stop protection module.Described enter paper testing circuit unit comprise and transmit and receive photoelectric tube.The former luminous site and the latter's sensitization position is positioned opposite to each other and be arranged at respectively in the opposing sidewalls that shredder enters paper passage.Described overload protecting circuit unit and described motor measurement of converse rotation circuit unit all access the tactile protection module that stops of described safety.

Described based on dielectric constant formula paper shredder control system adopt series circuit guarantee the personal safety when people touches described conduction touch panel.From the electricity of human body, start described touch-control control circuit unit, and then start all circuit that are attached thereto.Thereby described safety is touched and is stopped protection module and the movement of described shredder can not be worked guaranteed personal safety.Even if power switch is opened, the movement of described shredder does not still turn round.Described shredder has been realized real-time monitoring.Whole control procedure safety accurately.Described shredder performance when nobody supervises, be also stablize, reliable and easy-operating.

In described some other embodiment based on dielectric constant formula paper shredder control system, kneader bar is set to the induced electricity of induction from user.When induced electricity being detected on described kneader bar, control system responds by paper shredder core is enabled to stop, stops in fact kneader bar.In other other embodiment, the power-off before enabling stop of described paper crusher motor, is added in the moment of torsion on shredder transmission system and servo system to reduce in described kneader bar moderating process.

Accompanying drawing explanation

Fig. 1 has demonstrated the circuit diagram that uses the electric component of the paper shredder control system of prior art;

Fig. 2 is that a kind of touching of the present invention stops responding to assembly in paper shredder control system and the block diagram of module;

Fig. 3 is a kind of circuit diagram that stops responding to paper shredder control system electric component that touches of the present invention;

Fig. 4 is a kind of circuit diagram that stops responding to another embodiment electric component of paper shredder control system that touches of the present invention;

Fig. 5 is for a kind of flow chart that stops the control procedure of responding to paper shredder control system use that touches of the present invention;

Fig. 6 is a kind of embodiment demonstration of the device that stops the rotation of shredder gear;

Fig. 7 is the flow chart of having demonstrated the operation of one embodiment of the invention;

Fig. 8 is according to a kind of circuit diagram that stops the electric component of responding to an embodiment of kneader bar control system that touches of the present invention;

Fig. 9 is according to a kind of circuit diagram that stops the electric component of responding to another embodiment of kneader bar control system that touches of the present invention;

Figure 10 is according to a kind of top view that stops responding to the another embodiment of paper shredder control system that touches of the present invention;

Figure 11 stops responding to the paper shredder control system top view of an embodiment again according to a kind of touching of the present invention;

Figure 12 is the derivation diagram according to a collection of pulverizing raw material dielectric constant of the present invention;

Figure 13 A is the diagram according to the dielectric constant sensor that comprises the distribution of sensing element the first of the present invention;

Figure 13 B is the diagram according to the dielectric constant sensor that comprises the distribution of sensing element the second of the present invention;

Figure 13 C is according to the diagram of the dielectric constant sensor that comprises the third distribution of sensing element of the present invention;

Figure 14 is according to a kind of diagram based on an embodiment of dielectric constant formula paper shredder control system of the present invention;

Figure 15 is the diagram according to the dielectric constant sensor of use oscillating circuit of the present invention;

Figure 16 is according to a kind of cross section diagram that comprises the shredder based on dielectric constant formula controller of the present invention;

Figure 17 is according to an a kind of schematic diagram based on dielectric constant formula paper shredder control system of the present invention;

Figure 18 is according to a kind of block diagram based on dielectric constant formula paper shredder control system the first embodiment with start-up operation of the present invention;

Figure 19 is according to a kind of block diagram based on dielectric constant formula paper shredder control system the second embodiment with start-up operation of the present invention;

Figure 20 is the flow chart according to shredder operation main program of the present invention;

Figure 21 is the flow chart according to the initialization subroutine of shredder operation of the present invention;

Figure 22 is the flow chart according to the door open routine of shredder operation of the present invention;

Figure 23 is the flow chart according to the overtemperature protection subprogram of shredder operation of the present invention;

Figure 24 is the flow chart according to the Threshold subprogram of shredder operation of the present invention;

Figure 25 is the flow chart according to the machine overload subprogram of shredder operation of the present invention;

Figure 26 is the flow chart that manually moves back paper subprocess according to shredder operation of the present invention;

Figure 27 is the flow chart according to the machine paperboard subprogram of shredder operation of the present invention;

Figure 28 is the flow chart that manually enters paper subprogram according to shredder operation of the present invention;

Figure 29 is the flow chart according to the self-lock protection subprogram of shredder operation of the present invention;

Figure 30 is the flow chart that automatically enters paper subprogram according to shredder operation of the present invention;

Figure 31 is the flow chart that enters paper subprogram according to the time delay of shredder operation of the present invention;

Figure 32 is the flow chart according to the full subprogram of paper of shredder operation of the present invention;

Figure 33 is the flow chart according to the abnormal subprogram of dielectric constant of shredder operation of the present invention;

Figure 34 is the tactile flow chart that stops protecting subprocess according to shredder operation of the present invention;

Some embodiment are elaborated with reference to relevant drawings.Other embodiment, its feature and advantage will become apparent in ensuing description, maybe can be understood by putting into practice the present invention.In each figure, proportionally do not draw, identical numeral is by describing corresponding identical feature.Following description is not used in restriction, only for setting forth rule of the present invention.

The specific embodiment

In shredder now, there are some shredders to adopt to touch and stop detection technique and prevent that kneader bar from hurting people or pet.Referring to Fig. 1, the circuit of wherein showing is the example of this technology.SW2 is slide switch, and it can switch live wire and the zero line of civil power.Resistance R 12 and R13, capacitor C3 and C2, and diode D11, D12, D13, D14, the 24V power circuit of D15 and D6 composition relay.Diode D6, the power circuit of D7 and capacitor C1 composition voltage checking chip U1.The positive pole of described power supply is the live wire of civil power.Relay switch RLY-1, diode D2, triode Q1, resistance R 5, R27 and R6, and photo-coupler U5 composition machine operation power supply circuits.Diode D1, D8 and D21, temperature control indicator lamp (orange), triode Q4, resistance R 4, R14, and R11, and motor temperature detect switch (TDS) composition temperature control indicating circuit.Fuse F1, relay switch RLY1, motor, functional switch, and motor temperature detect switch (TDS) composition motor operation circuit.Motor running direction is determined by functional switch present position.Power supply, resistance R 7, R1, R9, R2, R8 and R10, diode D20, D16, D4, D5, D9 and D10, triode Q2 and Q3, and the pin 5 of voltage checking chip forms LED lamp indicating circuit.Metal decking part, resistance R 20, R19, R21 and R22, capacitor C8, and diode D19 and the tactile stopping detecting circuit of D17 composition.

When the position of described functional switch in " pass ", machine is not worked.When described functional switch is arranged on non-closed position and waste-basket when separation with machine, although machine open, can not shredded paper.When waste-basket is separation with machine body, described magnetic reed switch disconnects cutting off motor power.The operation of magnetic reed switch dead circuit is as follows: the pin 1 of voltage checking chip U1 detects the signal that magnetic reed switch disconnects, and the pin 5 of U1 is exported high level, Q3 and Q2 cut-off, and motor does not turn round.Power supply indicator and the tactile Fen Li indicator lamp of stop/waste-basket, R7, R8, D9 and motor temperature detect switch (TDS) composition current loop, thereby power supply indicator is bright with the tactile Fen Li indicator lamp of stop/waste-basket.

When described functional switch is removed from the position of " pass ", and waste-basket is when enter, and machine has been ready to running.The order of circuit operation is as follows: pin 1 output low level of U1, Q3 and Q2 conducting.Meanwhile, pin 6 output low levels on U1, Q1 conducting, relay R LY1 disconnects.Upper if now functional switch is arranged on " opening ", when described enter paper passage have the phone device of paper by shredded paper, otherwise shredder standby.Now, if staff, metal, or animal touches paper inlet and enters the metal part of paper passage, civil power so, component (R21, R19, R20) and described contact will form a loop, and now for the pin 5 and 6 of low level and U1, to be high level former thereby turn off motor due to the pin 8 of U1.In particular, when the pin 6 of U1 is high level, Q1 cut-off, described motor power disconnects.When the pin 5 of U1 is high level, Q2 and Q3 cut-off, described touching stops protecting indicator lamp bright.Entering paper passage in described contact from paper inlet and removing, shredder turns back to normal operating.

Describedly touch that to stop protection be to comprise that by arrange one at paper inlet conducting electricity the dielectric constant sensor of touch panel reaches.When people touches described conduction panel, the electrical conductivity of human body provides a faint signal to excite the tactile protection that stops to control circuit.In this case, the reduction of the Resistance Maximum of two 2.2M ohms the therefore not harm people of described circuit of electric current of the human body of flowing through.By the sensitive voltage checking chip of this Technology Need, carry out the state of touch panel described in Real-Time Monitoring.Therefore need high stability and sensitive chip.The circuit that caused by long-term use is aging also will weaken the measuring ability of even losing circuit.For two high resistance resistance, may the flow through electric current of human body of their restrictions, but in wet environment, they may lose efficacy, and caused people may directly contact civil power live wire, caused electric shock, even threat to life.

In an embodiment of the present invention, describedly based on dielectric constant formula paper shredder control system, can comprise following assembly: functional module, power module, and paper shredder core.Referring to Fig. 2, described functional module comprises touches stopping detecting circuit unit 4, and motor measurement of converse rotation circuit unit 7, enters paper testing circuit unit 5, overload protecting circuit 6, controller 3 and functional switch 86.All these unit are all directly connected to controller 3 except functional switch, and described functional switch is together with described controller co-controlling motor drive circuit unit 2, and then control paper shredder core 1.Conduction touch panel is connected to described tactile stopping detecting circuit unit, and described tactile stopping detecting circuit unit comprises touch-control control circuit and earthed switch circuit.

Described power module comprises power interface unit 81, safety switch 82, protective tube 83, gauge tap 84, controller power source 85, and motor drive circuit unit 2.Described gauge tap is relay switch, and described safety switch is door switch.Above-mentioned front four units in series, and by the control access motor drive circuit unit of functional switch 86.Described power supply is connected to described controller power source through described protective tube, is then connected to described controller.

Turn to Fig. 3, in one embodiment, described touch-control control circuit is mainly switching transistor circuit.Described conduction touch panel accesses the base stage of switch triode Q4 by resistance R 5.The base stage of triode Q4 is by capacitor C7 in parallel and resistance R 6 ground connection, and its colelctor electrode directly accesses power supply VCC, and its emitter stage is by capacitor C8 in parallel and resistance R 16 ground connection.The emitter stage of Q4 also directly accesses described earthed switch circuit.

Described earthed switch circuit is also switching transistor circuit.The described tactile output that stops control circuit accesses the input of described earthed switch circuit, as the emitter stage of triode Q2.The direct ground connection of emitter stage of triode Q2, its colelctor electrode accesses VCC by resistance R 7, and its colelctor electrode is also by the input of photo-coupler U1 access controller simultaneously.

Referring to Fig. 4, in another embodiment, touch-control control circuit comprises triode Q3.Described touch panel accesses the input of described touch-control control circuit, for example, by the tandem compound of resistance R 6 and R7, access the base stage of switch triode Q3, the base stage of triode Q3 is by capacitor C3, diode D4, with the parallel combination ground connection that resistance R 8 forms, its colelctor electrode is by power supply indicator and touch the parallel combination access power supply VCC that stops indicator lamp LED3, and its emitter stage directly accesses the input of described earthed switch circuit.

Described earthed switch circuit is also transistor circuit.The output of described touch-control control circuit, such as, the emitter stage of triode Q3, directly accesses the base stage of described switching mode triode Q2.The direct ground connection of emitter stage of triode Q2, the input of its colelctor electrode access controller 3.

Referring to Fig. 2, described enter paper testing circuit unit access controller 3, turn to now Fig. 3, described enter paper testing circuit unit comprise emission phototube IT1, with accept photoelectric tube IR1, opposite parallel to each other, the former luminous site and the latter's sensitization position arranges and is arranged at respectively in the opposing sidewalls that shredder enters paper passage.Overload protecting circuit unit 6 and motor measurement of converse rotation circuit unit 7 all access described based on dielectric constant formula shredder controller 3.

Return Fig. 2, motor measurement of converse rotation unit 7 and enter paper detecting unit 5 and be all linked into controller 3, and then to motor drive circuit unit 2, then arrive paper shredder core 1.Motor measurement of converse rotation unit 7 detects reverse signal, imports this signal of telecommunication into controller 3, and then electronic control paper shredder core 1 makes motor reversion by motor drive circuit unit 2.Enter paper testing circuit unit 5 and detect the insertion that enters paper in paper passage at paper inlet, and import this signal into controller 3, and then by motor drive circuit unit drives paper shredder core shredded paper.

Referring now to Fig. 5,, in shredded paper process, if having people to touch paper inlet to enter the touch panel of paper passage, shredder will stop immediately.Described touch signal is transferred into and touches stopping detecting circuit unit 4, then arrives controller 3, and makes shredder out of service by the power supply that cuts off motor drive circuit unit 2.If nobody touches described conduction touch panel, controller, by the control of unclamping motor drive circuit unit 2, allows described movement independent operation.

Refer back to Fig. 3, described shredder is comprised of following functions: overload protection; Light-operated shredded paper; Shredded paper, closes and reverse function; And touch stops automatically.

The power supply of described controller is described below.The civil power of input is by by resistance R 1 and R2, capacitor C1 and C2, the circuit shunting of diode D5 and D6 and Zener diode ZD1 composition, rectification, voltage stabilizing and filtering.24V direct current after voltage stabilizing is the power supply of described controller.It is much smaller than can, by the safe voltage of human body, not damaging human or animal.

The power supply of described tactile stopping detecting circuit unit is described below: the civil power of input, through bridge rectifier, provides 12V DC voltage by voltage stabilizing and filtering.Described circuit comprises diode D1-D4, Zener diode ZD2, resistance R 12 and capacitor C3.

When people touches described metal decking, from the induced electricity of human body, through 1 megaohm resistance, arrive the base stage of triode Q4.Described induced electricity causes triode Q4 and Q2 conducting, triode Q3 cut-off, and then cut off motor power, the self-braking object of shredder when reaching someone and touching paper inlet and enter paper passage.

Referring now to Fig. 4,, the shredder in the present embodiment has following function composition: on-off LED indication; Touch and stop protecting LED indication; Overload LED indication; Civil power indication; Light-operated shredded paper; And shredded paper, close and reverse function.

Described overload protection and Men Kai LED deixis comprise R18 by one, R14, and R13, R11, and R12, LED 1 and LED2, diode D10, D9, Zener diode ZD2, the circuit of capacitor C5 and controllable silicon SCR is implemented.

Described controller power circuit be one by resistance R 1 and R2, capacitor C1 and C2, diode D1 and D2, Zener diode ZD1, and the circuit of capacitor C2.Power supply with same voltage stabilizing 24V dc source as described controller.It,, much smaller than by the safe voltage of human body, can not damage human or animal.

Describedly touch that to stop functional description as follows.When people touches metal decking, from the induced electricity of human body, through resistance R 6 and R7, arrive the base stage of triode Q3.Described electrical signal of reaction causes Q3 and Q2 conducting, Q1 cut-off, and cut off motor power, and motor stops operating, and people is protected.If described tactile stopping detecting circuit unit adopts independently bridge circuit power supply and by photo-coupler and the isolation of described motor, its can be more stable.

When people touches described panel, people provides triggering signal in the touch of panel metal part, and this signal supplies circuit to open Q3 by base stage.Described base stage comprises resistance R 7, R6 and R8, diode D4, and capacitor C3 for circuit.If the forward voltage coming from human body is enough, Q3 and Q2 will conductings simultaneously.When Q2 conducting, its collector voltage reduces, and then by R5, opens to touch and stop indicator lamp, makes Q5 cut-off, and make Q1 cut-off by D15 by D16.If now reversal of machine running, Q5 will conducting.But due to described touch voltage, Q5 cut-off, motor is closed.Another kind of situation is when machine is when pulverizing state.Now Q1 makes motor forward rotation by conducting.But due to people's touch, Q1 cut-off, motor also cuts out.In either case, machine all cuts out to guarantee people's safety.

When people no longer touches the metallic plate of machine, triode Q3 is not owing to having trigger voltage to close, and machine is got back to normal operating conditions.The operation principle of described power indicating circuit is as follows.When machine is selected in pulverizing or during inverted status, power supply indicator is bright by functional switch, when machine during in halted state indicator lamp go out.Described power indicating circuit comprises indicator lamp, resistance R 17 and R16, and triode Q4.When machine is during in halted state, due to triode, Q4 does not have conducting, so indicator lamp goes out.For inverted status, the tie point of the emitter stage of the emitter stage of triode Q4 and diode D12, and functional switch built-up circuit loop, power supply indicator is bright.When machine is when pulverizing state, the emitter stage of Q4, diode D13, and functional switch built-up circuit loop, power supply indicator is bright.

Point less user, particularly child, may have the finger that can avoid shredder machine security system.Accordingly, embodiments of the invention can comprise a shredder security system, and this system can be contacted significantly and activate by kneader bar.Different from the proximity detector that starts safety measure when gtoal setting shredder crust component during to preset distance, kneader bar touch-stopping safety system described herein by with the target contact start of kneader bar.

Conventionally, when based on dielectric constant formula kneader bar control system during by kneader bar contact start, power supply and paper crusher motor disconnect.Biology sensor is a kind of when can cause a kind of sensor of effect with biological and while receiving bio signal Tathagata from biological electrical signal of reaction.Especially, when described in biological during kneader bar, by described biogenic electrical signal of reaction be connected biology sensor on kneader bar namely bio-safety blade detect.The electrical signal of reaction being received by described bio-safety blade produces bio signal, and it can start safety touches and stop protection module and cause safety stop, and wherein at least paper crusher motor is de-energized.

Go to Fig. 6, another embodiment of the present invention has been described.The magnetic valve 27 that control circuit 35 can arrange a snap action is used as mechanical electric power stop 25, the rotation of this stop restriction kneader bar.For example, stop 25 can be placed near the transmission system of the transmission system between motor and blade, the meshing gear that described transmission system represents such as reference 55, the rotational synchronization of this gear and kneader bar.

After being responded and being started, the engageable travelling gear of stop 25, or driven gear, or above-mentioned both.When user contacts with kneader bar, from user's electrical signal of reaction, cause stop 25 to be located between the described engaging tooth 55 of travelling gear and driven gear, slow down rapidly and stop kneader bar.The stop 25 that absorbs kneader bar residue rotation potential energy can be by durable, flexible, anti abrasive and impact absorbency material, such as but not limited to, high density polyethylene (HDPE) composition, although other materials, such as the natural rubber of sclerosis may be also suitable.The first-selected cheapness of material of stop 25 very may not damaged engaging tooth 55.Stop 25 can be rubber wedge form, and it can be installed on rapid-action magnetic valve 27 to reach quick, stationary positioned stop 25.Described chock can be by durable, and flexible, wear-resisting forms with impact absorbing material, such as elastomeric material.

Typically, magnetic valve 27 can be plug-type magnetic valve form, by control circuit 35, is started, and control circuit 35 is for responding the biogenic electrical signal of reaction contacting with kneader bar.Before stop 25 location, paper crusher motor can stop, and magnetic valve 27 can be activated afterwards, causes fast " soft stop only " at 55 insertion chocks 25 of engaging tooth." soft stop only " can obviously reduce engaging tooth or other mechanical transmission part or the contact user of kneader bar and the traumatic possibility contacting of kneader bar.

The shredder gear that other embodiment can stop turning round as machine power stop 25 with clutch and then be blade.Such as, thereby clutch can be untied a gear owing to causing described axle to stop operating with the blade relevant frictional force that interacts from being connected to the axle of gear.Another clutch example can be the clutch between motor and gear-box, and it can discharge the moment of torsion being transmitted by described motor.Another embodiment can comprise a circuit, and it makes to be backwards to certain to a certain degree by the electric current of motor, has offset the motional inertia of motor, therefore causes electromagnetic braking.This system can produce the reverse of considerably less (if any) on motor.

Fig. 7 has demonstrated the two-stage guard method 700 of a kind of operation based on dielectric constant formula paper shredder control system.In the first order, shredder provides the first sensor in the first phase of sensitization response.In the second level, shredder provides the second sensor in the second phase of sensitization response.In embodiment herein, the first order can consist of kneader bar sensor, and this sensor is responded to and biological contacting by receiving from the induced electricity (or electrical signal of reaction) of biological indication contact.The second level can consist of conduction touch panel, and described panel is responded to and biological contacting by receiving from the electrical signal of reaction of biology indication contact.In a particular embodiment, described first order process can comprise that the described electrical signal of reaction of coupling touches and stops protection module to described safety.As response, described safety is touched and is stopped protection module and can make paper crusher motor power-off and arrange stop in machine driven system, controls that kneader bar is quick and complete stops.Similarly, second level process can comprise that the electrical signal of reaction that coupling is applied on described conduction panel arrives described touch panel unit, and this touch panel unit conversely representative of the inductive coupling signal of telecommunication touches and stops protection module to safety.As response, described safety is touched and is stopped protection module and can make paper crusher motor power-off, causes kneader bar stall.

In further embodiments, single-phasely stop being used to described the first phase of sensitization, wherein kneader bar sensor is responded to and biological contacting by receiving from the electrical signal of reaction of biology indication contact.The representative of electrical signal of reaction afterwards can be coupled to the tactile protection module that stops of described safety.As response, described safety is touched and is stopped protection module and can make paper crusher motor power-off and arrange stop in machine driven system, controls that kneader bar is quick and complete stops.

Fig. 8 is a circuit diagram having demonstrated the embodiment 800 based on dielectric constant formula kneader bar control circuit.Although the touch panel relevant control circuit in Fig. 8 and Fig. 3 has some functional similarity, but it is distinguishing with the circuit in Fig. 3 that those skilled in the art still can realize based on dielectric constant formula kneader bar control circuit 800, touching in the adaptability of stopping control system 810, be induced electricity to receiving from biology and from the induced electricity sensitivity kneader bar 820 the most significantly.

For responding the touch of the biology detecting to metal kneader bar, the tactile control system 810 of stopping can represent the induced electricity sensing by activation (ON) series connection triode Q3 and Q4 generation signal 825.Bio signal 825 can be coupled in by photo-coupler OPT01 the Q2 of main control circuit 850.OPT01 can further separate the biology that touches kneader bar 820 with the potential fatal electric power for starter 840.Triode Q2 can be used as switching manipulation, and when OPT01 receives that bio signal represents, triode Q2 can be set to cut-off, drives dynamo-electric limit element 860.Electromechanical limit element 860 can comprise relay coil, and when triode Q2 closes, this relay coil can make motor 840 power-off.In addition, electromechanical limit element 860 also can comprise magnetic valve, and this magnetic valve is connected to machine driving stop.

In the environment of Fig. 6, the non-limitative example that is connected to the magnetic valve of machine driving stop can be the magnetic valve 27 that is connected to machine driving limiter 25.When triode Q2 ends, described magnetic valve can power-off, causes machine driving stop 25 to be driven into mechanical transmission part, in engaging tooth 55.Alternatively, the non-limitative example of another machine driving stop can be the clutch being connected on electromechanical limit element 860.In another unrestricted replaceable example, machine driving stop 25 can be implemented by chock and clutch, and wherein electromechanical redundant is selected.

Fig. 9 is the circuit diagram of having demonstrated based on another embodiment 900 of dielectric constant formula kneader bar control circuit.Blade touches stop sensor 910 can be connected to IC I920, for example, and on pin 16.The bio signal that is received from blade biology sensor 910 is received pin 16, and next pin 16 ends pin 15 or the power supply signal of " low " is set on pin 15.The power supply signal of this " low " is received by NPN triode Q1, and triode Q1 responds described low signal cut-off, causes motor 930 to be de-energized.In addition, also configurable I CI920 provides " height " signal (motor forwards/reverse) on pin 14.From " height " signal of pin 14, can be coupled to start NPN triode Q2 and make motor 930 counter motions, this action need at least time long enough is carried out the electric braking of kneader bar.In addition, triode Q2 and relay R LY-2.3 can be the part of electromechanical limit element, and described electromechanical limit element also can comprise wedge mechanical stop, clutch mechanism stop, or both have.

In other embodiment of the present invention, the sensor that comprises the Metal Contact element being oppositely arranged also can be access in shredder inside except being access in kneader bar.When described in biological during Metal Contact element, described in the sensor that is oppositely arranged cause safety and touch and stop protection module and cause safety stop.A safety stop can be set as making the paper crusher motor power-off of forward rotation or shredded paper direction.Equally, safeguard protection can be set a switching stop prevention kneader bar motion fast.Further, during safety stop, described paper crusher motor in the opposite direction moment energising causes kneader bar electric braking.

Turn to Figure 10, shredder entirety (being called for convenience, " shredder ") 1000 can be provided with the inner chamber 1010 of kneader bar 1020.The inner chamber 1010 of shredder 1000 can comprise framework, and conventionally 1030, this framework surrounds blade 1020 at least partly.Support frame 1030 can comprise that one or more common horizontal support base constructions for example, such as member 1032 and one or more common vertical base constructions, member 1034 (horizontal direction is oriented to the longitudinal axis that is parallel to kneader bar 1020).

In the unrestricted embodiment 1000 of some selected shredders, at least a portion of at least one member of support frame 1030 can be metal material, forms a Metal Contact element.Described Metal Contact element can be a part for described metal base structure.In some selected embodiment, support frame 1030 can be comprised of conducting metal member, and whole so in fact support frame can be a metallization contact.Metallic support framework 1030 can be placed on lower cover 1060.The kneader bar 1020 that framework 1030 can be in shredder 1000 provides improved support structure, and, probably for paper crusher motor 1090 and the machine driven system that represented by motor drive shaft provide support.One or more bio-sensing elements can be arranged near support frame 1030 or on it, forms cutter core assembly.Cutter core assembly can comprise at least one or more kneader bars 1020, comprises one or two the support frame 1030 in base construction 1032 or 1034, metallic gasket 1040, sensor 1050, or lower cover 1060.After receiving from biological electrical signal of reaction, described cutter core assembly can cause that bio signal 1054 is transferred to control system (safety is touched and stopped protection module) 1055, cuts off shredder power supply.

Conventionally, described Metal Contact element, such as what represented by supporting base structure 1032 or 1034, away from (such as, do not contact) kneader bar setting, and can be inserted between kneader bar entrance (at a upper cover, not shown in the figures) and kneader bar 1020.Typically, described Metal Contact element 1032 is connected to sensor 1050, this sensor is used for receiving the electrical signal of reaction 1052 from the biological (not shown) contacting with Metal Contact element 1032, and produces representational electrical signal of reaction 1054.The Metal Contact element 1032 being connected on sensor 1050 can be described to a biology sensor being oppositely arranged (combination, is the biology sensor 1051 being oppositely arranged), and electrical signal of reaction represents that 1054 can be described to bio signal.The biology sensor 1051 being oppositely arranged can be activated coupled biological signal 1054 and touch and stop protection module 1055 to safety.The biology sensor 1051 being oppositely arranged can be used to the induction biological near region to kneader bar 1020 contact, now biological with not directly contact of kneader bar 1020.

Response detects the biology sensor being oppositely arranged 1051 of near region contact, and safety is touched and stopped protection module 1055 and can cause safety stop, controls that kneader bar 1020 is quick and complete to be stopped.When safety stop, safety is touched and is stopped the break power supply 1094 of paper crusher motor 1090 of protection module 1055, aforesaid stop also can be set to machine driven system 1095, or both use.In the embodiment being allowed in motor return motion, the tactile protection module 1055 that stops of safety can cause electric braking in the opposite direction moment energising of paper crusher motor, and this can further and faster reduce positive-directional and inertial motion of kneader bar.

In the unrestricted alternative embodiment showing at Figure 10, Metal Contact element can be the section being arranged on shredder, bar, or common circumferential ring, be arranged with 1020 points of kneader bars, conventionally with respect to enter kneader bar 1020 to enter paper direction disposed thereon.The shape of described Metal Contact element can be continuous or is interrupted.As shown in figure 10, the strip metal contact element of a unrestricted embodiment can comprise metal blade pad 1040, and it can be arranged between adjacent kneader knife piece element 1042A and 1042B.One or more metal blade pads 1040 can be connected to sensor 1050, and when coming in contact with biological (not shown), sensor 1050 can be accepted electrical signal of reaction 1041 from metal blade pad 1040 like this.Conventionally, arrange together with the pad contact interface assembly that blade pad is oppositely arranged with, being correlated with and dividing is arranged with near kneader knife piece element (for clarity, being component of the blade 1042A and 1042B).

In such an embodiment, biological and hardware 1040 comes in contact and can transmit bio signal 1054 to touching and stop protection module 1055 safely by initiation biology sensor 1050.Next, safety touch stop protection module 1055 can be by the 1094 execution safety stops of cutting off the electricity supply, and from paper crusher motor 1090 power-off.In this safety stop, safety is touched and is stopped protection module 1055 and aforesaid stop also can be set to machine driven system 1095, drives that kneader bar 1020 is quick and complete to be stopped.When paper crusher motor 1090 is configured to reverse, the tactile protection module 1055 that stops of safety can make motor 1090 reversions cause electrodynamic braking by energising.At some, use in the embodiment of electrodynamic brakings, safety is touched and is stopped the configurable aforesaid stop of protection module 1055, conventionally arranges with the instantaneous electrodynamic braking of an enough time simultaneously, controls that kneader bar 1020 is quick and complete to be stopped.

In first unrestricted example, multiple hardwares of support frame 1010 can be electrically connected mutually and be connected to sensor 1050, and therefore safety is touched and stopped protection module 1055 and can respond to occur in and biological cause safety stop with contacting of framework 1030 a certain connecting surfaces.In second unrestricted example; multiple metal blade pads 1040 can be electrically connected to sensor 1050, make control system (safety is touched and stopped protection module) 1055 can respond biology and cause safety stop with contacting of one of them metal blade pad 1040.In the 3rd unrestricted example, multiple hardwares of support frame 1010 and multiple members of metallic gasket 1040 can be electrically connected to sensor 1050, control system 1055 can be responded with biological and cause safety stop with the contacting of at least one in hardware, metal blade pad.In the 4th unrestricted example; safety is touched and is stopped protection module 1055 and can be set to control shredder function; as; motor power; overheated, or stop up, by a starting switch, activated; at a predetermined active period, optionally activate, or when an electrical signal of reaction is received or temporary transient reverse motor during " not stall " starter energising.

Figure 11 has demonstrated the top view of shredder entirety 1100, with a height similar to shredder in Figure 10 1000.In other non-limiting example of selecting according to the present invention, shredder framework (conventionally 1110) can be connected to blade baffle plate 1111,1112, single blade baffle plate 1111 and 1112 is divided and is arranged with respect to the longitudinal axis of kneader bar 1120 by a predetermined baffle plate gap 1115.Predetermined baffle plate gap 1115 can be limited by crushed material and be entered the region in baffle plate gap 1115 by size design. Blade baffle plate 1111 and 1112 can be arranged on kneader bar 1120 tops, and is arranged with 1120 points of kneader bars.Conventionally, below baffle plate gap 1115 can be arranged on, and longitudinally align with the paper inlet opening (not shown) of shredder 1100.Baffle plate gap 1115 from blade 1100 enough away to allow shredder 1100 normal operatings, but the entrance of restriction kneader bar and their unexpected hazardous environment.

One or two be electrically connected to biology sensor 1150 in blade baffle plate 1111,1112, forms combined bio sensor 1151.The electrical signal of reaction 1141 that the biology that 1111,1112 receptions of blade baffle plate contact with the blade baffle plate of electrical connection transmits, and this electrical signal of reaction 1141 can be reached to sensor 1150.As response, sensor 1150 can produce bio signal 1130, and this bio signal 1130 can be touched and stop protection module 1155 and receive safely.When bio signal 1130 is touched and stops protection module 1155 while receiving safely, safety is touched and is stopped protection module 1155 and can respond by carrying out safety stop.Similar with the safety stop of shredder 1000 in corresponding Figure 10; safety is touched and is stopped protection module 1155 and can 1160 to bio signal 1130, make response the power supply of sequential break-off paper crusher motor 1190 by cutting off the electricity supply, and controls that kneader bar 1120 is quick and complete to be stopped.In certain embodiments, by safety, touch and stop the safety stop that protection module 1155 causes and aforesaid stop also can be set to machine driven system 1195.As the shredder 1000 in Figure 10, by safety, touched the rotator inertia that stops safety stop that protection module 1155 causes and also electrodynamic braking can be carried out and reduce kneader bar 1120.

Blade baffle plate 1111,1112 can improve structural strength and the integrality of shredder 1100, and the product stability of enhancing is provided, the product service life of prolongation, and reduce running cost.Further, the baffle plate gap 1115 between blade baffle plate 1111,1112 can be adjusted on width, makes the corresponding (not shown) gap that described baffle plate gap 1115 can be nearest with shredder 1100 paper inlet openings roughly the same.It is roughly equal that baffle plate gap 1115 also can be set to the corresponding (not shown) gap nearest with shredder 1100 paper inlet openings.In addition, it is slightly narrow that baffle plate gap 1115 can be set to the corresponding (not shown) gap more nearest than shredder 1100 paper inlet openings, and make to damage material, can not be admitted to blade 1120.In baffle plate gap 1115, be slightly narrower than in an embodiment in the nearest corresponding (not shown) gap of shredder 1100 paper inlet openings, biology more likely caused safety stop with the touch contact of the Metal Contact sensor 1111,1112 of biology sensor 1151 before this biological kneader bar 1120.This arrangement even also can be strengthened the security of shredder 1100 at people's direct-detection shredder 1100 internal parts or while being engaged in the engine 1100 of maintenance and test energising.

In other alternate embodiment, the described safety stop apparatus and method relevant to shredder 1100 in shredder in Figure 10 1000 and Figure 11, can be used alone or applied in any combination.In the 4th unrestricted example, biological and be electrically connected on the touch contact between the blade baffle plate 1111 of sensor 1150, can cause that safety is touched stops protection module 1155 and carries out safety stop.In addition, this blade baffle plate embodiment of Figure 11 also can be combined with one or more unrestricted examples described in conjunction with Figure 10.In the 5th unrestricted example; come from one or more hardwares or a metallization pad biological and framework 1010; and the one or more blade baffle plates 1111 that are electrically connected on sensor 1050 or 1150; 1112 contact, causes safety to be touched and stops protection module 1055 or 1155 execution safety stops.Further; any aforesaid unrestricted example all can be modified so that by kneader bar 1020 or 1120; and one or more metal base structures, pad between metal blade, or the contact detection of blade baffle plate can cause that the tactile protection module that stops of safety is such as safety stops are carried out in unit 1055 or 1155.

In addition, embodiments of the invention can provide a kind of cheap, solution reliably and easily for potential danger and safety problem, described potential danger and safety problem are caused by underlying cause: attempt to paper inlet of paper shredder excessive enter paper, or the insertion of contingency inappropriate object or a biological part, or attempt to clear up excessive enter paper or blockage.According to explanation below, can understand some embodiment for the safety paper-feeding mouth device of shredder, in addition, the dielectric constant sensor that can be connected to paper inlet of paper shredder by use is realized, and this device also can comprise that aforesaid touching stop responding to Security functional component.

When a collection of pulverizing raw material is the inhomogeneous paper of a pile, the dielectric constant of this pulverizing material sample is determined will become complicated, for example, because every paper can show specific density, moisture, paper weighs or basis weight; Because adjacent paper may be arranged to different from other; Also, because surrounding environment comprises temperature humidity, all these can a kind of special mode affect special pulverizing raw material.In addition,, when determining that the dielectric constant of a pile predetermined thickness paper represents, the air gap can cause very large systematic uncertainty.Although there is sizable difference among a small circle, the dielectric constant range that represents specific density scope is roughly confirmable.

Based on object herein, pulverizing raw material can be a kind of material that can be pulverized by shredder, and a collection of can be one or more parts of pulverizing raw material, and pulverize material density, can be pulverizing material quality and volume ratio, and can be by the correction of air insert layer.Pulverizing every kind of material density and a collection of pulverizing material density all can be substituted by DIELECTRIC CONSTANTS, ε is the macroscopic material performance of medium, and described medium can comprise pulverizing raw material, and dielectric (flux) density D is connected to the electric field E relevant with described pulverizing raw material, that is, in fact:

$\mathrm{\ϵ}=\frac{D}{E}---\left(1\right)$

In particular, Figure 12 can analyze with a kind of Maxwell equation,

Wherein D 1210 is motion vectors, and dA is the vector table area that comprises extroversion (V+ → V-) normal 1220, and q 1230 is the electric charges that surrounded by the surperficial S1240 sealing.Because can suppose desirable geometrical plane, the surface charge density on electrode V+ current potential can be considered uniformly, and be appointed as+σ 1250.The opposed surface electric charge of a be designated as-σ 1255 is present on the V-current potential on electrode.Please note this analyze in pay close attention to be potential difference rather than absolute potential.Because a part for a batch of material (as a piece of paper) has linear character conventionally, the relation between them:

D＝εE，(3)

The result that it echoes equation 1, it has been generally acknowledged that while running into different layers, dielectric constant changes, as described in Figure 12.

Because used geometrical plane, described D and E vector field are mainly pointed to electrode plane and are pulverized the vertical plane of raw material layer.If we are confining surface as dotted line frame 1270, vertical side represents surface, A district so, to the non-zero contribution of equation 2 integrations, is then parts of the vertical surface on right side, and vertical surface place, described right side motion vector is got even value and is labeled as Di.Therefore, area divides and becomes

Di＝q＝σA，(4)

Or

Di＝σ(5)

Application equation 3, to i layer, produces

Ei＝σ/ε(6)

And current potential V can be described to:

V＝-∫cE·dl (7)

Line integral starts from V-electrode and ends at V+ electrode herein.

Conventionally, the function ε (ω) that dielectric constant can be used as frequency changes, " dielectric constant " but used herein (capacitance) is also referred to as " static relative dielectric constant (capacitance) ", i.e. ω=0 in ε (ω).Conventionally, ε (0) _rbe also referred to as " dielectric constant (capacitance) " of material." the dielectric constant permittivity " hereinafter mentioning can be regarded as and " static relative dielectric constant (capacitance) ", and " dielectric constant dielectric constant " or k are identical.One of ordinary skill in the art can know that the dielectric constant (capacitance) of air (k) is approximately 1.0, the dielectric constant (capacitance) of some paper measured value between 1.5 to 6.0.Conventionally, the dielectric constant of material (capacitance) can see in product,

∈＝∈o×∈r (8)

ε herein ₀be the dielectric constant (capacitance) of vacuum, its value is about 8.85 × 10 ^-12c ²/ N-m ²; And

ε _rfor being filled in the relative dielectric constant (capacitance) of material in dielectric constant detector gap (being represented by d).

For multilayer, pulverize the relative dielectric constant (capacitance) of raw material, Figure 12 also show total phsyical density in this " a pile " all individual elements density summation (herein, vertically watch), and comprise and (for example may be inserted into the air gap that solid can mince between sheet, 1a, 1a+1,1a+2) summation.For convenient, local length may be defined as

f _i＝l _i/e (9)

There is a static relative dielectric constant ε each the air gap _air=1, the insertion sheet (being assumed to paper) of each pulverizing raw material can have one at 1.5 < ε _paperstatic relative dielectric constant (capacitance) in < 6.0 scopes.In Figure 12, pulverizing material piece has static relative dielectric constant ε separately ₁, ε ₂... ε _i... ε _m, ε _n.

The people who has electrical engineering field substantially to train general knowledge can understand the function that electric capacity is dielectric constant (capacitance); But dielectric constant is not the function of electric capacity.Therefore, the essential characteristic of dielectric constant is independent of the characteristic derived of electric capacity, and dielectric constant sensor is not a capacitance sensor.Therefore, dielectric constant can be described to not reference capacitance, but making any this reference is all the principle of understanding the embodiment of the present invention for one of ordinary skill in the art is simplified.

Conventionally, in normal operating, safety cover plate can be opened to manufacture one with entrance that can gap-acceptance.Gap (air filling) representative of described sky has the volume of air of definite dielectric constant values ε.The material that enters this gap is added in dielectric constant (capacitance) measured value in this gap of electric field change leap of crossing over this gap by change.For example, there is an initial dielectric constant values in a gap that comprises empty volume of air, the dielectric constant values ε measuring for the first time for this dielectric constant values ₁represent.The example in such gap can be the opening of paper inlet of paper shredder.When sheet-fed inserts paper inlet of paper shredder, by this gap, the DIELECTRIC CONSTANTS of (space+paper) of second measurement ₂may be different from the dielectric constant measurement value of empty gap.Similarly, have the dielectric constant values (capacitance) in the space of ten paper insertions to be quantified as the 3rd dielectric constant values recording (capacitance), its reflection has ten paper to insert paper inlet gap.

In the unrestricted example based on dielectric constant formula paper shredder control system, shredder is set to ε when the dielectric constant values recording is between second dielectric constant measurement value and the 3rd dielectric constant measurement value ₁< ε < ε ₂shi Qidong shredded paper.Similarly, the dielectric constant values ε recording when shredder _sexceeded predetermined dielectric constant maximum ε _mtime can be configured such that paper crusher motor power-off, do not carry out crushing operation.Alternatively, shredder is set to when the dielectric constant values recording is not or not the time can operating within the scope of dielectric constant values, such as ε _s< ε ₁, or ε _s> ε ₂, paper crusher motor power-off, does not carry out crushing operation.In addition, shredder can be set to as the dielectric constant values ε in exercisable dielectric constant range recording ₁< ε _s< ε ₂time make paper crusher motor energising, and carry out crushing operation.As a unrestricted example, exercisable dielectric constant range can be in threshold epsilon ₁and threshold epsilon ₂between, it can represent between a piece of paper to ten paper.

Figure 13 A-C has demonstrated an alternative embodiment of dielectric constant sensing element and dielectric constant sensor.In Figure 13 A, sensor 1300 can comprise two conductive plates 1305,1310, and they are arranged on the opposite face of longer paper inlet of paper shredder opening 1320, this paper inlet opening is arranged in shredder upper cover 1330, and upper cover 1300 also can comprise that paper inlet enters paper passage 1325.The bus that conductive plate 1305,1310 can be configured to the longitudinal setting adjacent with two accesses terminal. Conductive plate 1305,1310 can be placed on longer paper inlet of paper shredder 1320 " mouth ", or is placed on paper inlet and enters the relative position of paper passage, generally away from " mouth ". Conductive plate 1305,1310 can be formed by exposed or half exposed conductor, and described conductor can include but not limited to, foil or metal forming, although other conductive material also can be used. Conductive plate 1305,1310 can be connected to the lead- in wire 1307,1311 corresponding to each other, and they can be connected to dielectric constant metering circuit 1315 by concussion element 1350.Conductive plate 1305 can be connected to the induction of signal portion of concussion element 1350 at anodal V+, and conductive plate 1310 can be access in signal lead-V or ground connection.

In Figure 13 B, sensor 1333 can be by two cover conductive plate 1335,1340 compositions, every suit 1335,1340 represent a corresponding terminal relatively, and each termination set 1335,1340 is longitudinally arranged on the opposite face of the longer paper inlet of paper shredder opening 1320 in shredder upper cover 1330.Generally speaking, the multiple conductive plates on 1335, can be connected in first terminal conventionally, such as V+ terminal.Similarly, generally speaking, the multiple conductive plates on 1340 conventionally, can be connected in second terminal, such as, V-terminal or ground connection.In certain embodiments, containing each plate of 1335 of multiple conductive plates conventionally can be on 1340 a conductive plate of electricity pairing separately. Conductive plate 1335,1340 can be connected to lead- in wire 1307,1311 separately, and above-mentioned lead-in wire can be connected to dielectric constant metering circuit 1315, and described dielectric constant metering circuit can comprise concussion element 1350.Conductive plate 1335 can be connected to 1350 induction of signal parts of concussion element V+ end, and conductive plate 1340 can be connected to signal lead-V or ground connection.

In Figure 13 C, sensor 1370 can be comprised of two or more conductive plate 1371-1375, and these conductive plates are arranged by predefined magnetic field sensor pattern.In addition, selected conductive plate, for example conductive plate 1371-1372, can be partly or entirely closed in the part of shredder upper cover 1330, such as, approach longer paper inlet of paper shredder opening 1320.In Figure 13 C, conductive plate 1371-1372 is illustrated as and is electrically connected and forms conductive terminal, is V+ terminal herein.Similarly, conductive plate 1373-1375 is illustrated as and is longitudinally arranged on shredder upper cover 1330, and near paper inlet opening 1320, and the relative position of corresponding conductive plate 1371-1372 forms V-or GND terminal.Conductive plate 1371-1372 and 1373-1375 can be connected to lead- in wire 1307,1311 separately, and these lead-in wires can be connected to dielectric constant metering circuit 1315 by concussion element 1350 again.Conductive plate 1371-1372 can be connected to the induction of signal part of concussion element 1350V+ end, and conductive plate 1373-1375 is connected to signal lead-V or ground connection.

Figure 14 has described a shredder embodiment, symbolistic by 1400 representatives, comprises dielectric constant response type paper shredder control system 1425.Paper shredder control system 1425 can comprise dielectric constant signal condition system 1435, this signal condition system can comprise again and is connected in dielectric constant sensing element 1402,1403 dielectric constant sensor 1410, and be connected in the dielectric constant threshold module 1430 of dielectric constant sensor 1410.Dielectric constant control system 1425 also can be connected to paper crusher motor 1460.Dielectric constant sensing element 1402,1403 setting is used for responding to dielectric constant, or the variation of dielectric constant in the certain area that approaches dielectric constant sensing element 1402,1403.Conventionally, electric field 1420 can be arranged between dielectric constant sensing element 1402,1403.Sensing element 1402,1403 response applies the upset of electric field 1420, and this can be caused by the variation of the localized area dielectric constant of the sensing unit between 1402,1403.Although be proficient in, those skilled in the art are clear can use a variety of dielectric constant sensors and dielectric constant sensing element, and an example of sensor and sensing element can be the dielectric constant sensor that contains at least two points of parallel electrically conductive panel elements that are arranged.When electric charge is added on conductive plate 1402,1403, at electric field 1420, form the feature dielectric constant that inserts material between conductive plate 1402,1403.When the material that contains differing dielectric constant is inserted between conductive plate 1402,1403, electric field 1420 is corresponding to impact containing magnetic field of dielectric constant difference experience of described insertion material.The dielectric constant signal 1412 of induction is drawn in this impact on conductive plate 1402,1403, described conductive plate access dielectric constant sensor 1410.Described impact can excite shredder controller 1440, or photo-sensitive cell 1490 can excite shredder controller 1440.

Dielectric constant sensor 1410 can receive, and amplifies, and filters, or quantizes the dielectric constant signal 1412 sensing, generates the dielectric constant signal 1427 of modulation.Amplification can include but not limited to, curtage amplification or stabilisation.Filtration can include but not limited to, signal levelling and noise reduction.It is that modulation dielectric constant signal 1427 produces an integer value that quantification can comprise corresponding to the dielectric constant signal 1412 sensing.Dielectric constant threshold module 1430 can be analyzed modulation dielectric constant signal 1427 and decide the threshold value of modulation signal 1427 whether to exceed predetermined occlusion threshold.Alternatively, dielectric constant threshold module 1430 can determining modulation dielectric constant signal 1427 whether within the scope of predetermined crushing operation, whether signal 1427 is on predetermined crushing operation scope, or whether at least one in these problems under predetermined crushing operation scope of signal 1427.In response to the dielectric constant condition of the induction by 1427 representatives, paper shredder control system 1425 optionally makes motor 1460 switch on or power-off.Paper shredder control system 1425 also can make motor 1460 energisings carry out forward or reverse.

Forward Figure 15 to, an example of oscillating circuit 1500, is similar to the concussion element 1450 of describing in Figure 14.Oscillating circuit 1500 can receive the difference input from input lead 1505,1510, and the electricity of the dielectric constant values that there measures in sensor 1570 with representative is poor.Described difference input can be reflected as the discernible concussion numerical value determining by the interaction of input lead 1505,1510.The oscillating circuit 1500 regularly dielectric constant values of detecting sensor measures 1515, and can import the variation of measured value 1515 into control circuit 1525.Oscillating circuit 1500 can be configured to the centrifugal pump of Measuring Dielectric Constant, or is configured to identify at least one predetermined dielectric constant threshold value.In addition, the dielectric constant sensor 1570 that comprises exposed V+ sensing element also can be used as to touch and stops controlling sensor use, and the safety stop of wherein describing in Fig. 9 detects contact by induction from biological induced electricity and carries out.

Figure 16 has shown an embodiment 1600 of shredder, and it can be controlled based on dielectric constant formula shredder controller 1650.Shredder 1600 can be in conjunction with the element of the description relevant with Fig. 1-15 and circuit.Conventionally, shredder 1600 comprises the paper inlet opening 1610 combining into paper gap 1625, pulverizes raw material 1630, such as paper for holding.In certain embodiments, due to a piece of paper inserts the change in dielectric constant that empty paper inlet opening 1610 causes can be by two or more dielectric constant sensing elements 1660,1661 detect, these sensing elements produce enough dielectric constant output signals 1618, and this signal causes based on dielectric constant formula shredder controller 1650 by driving dynamo-electric paper shredder 1635 to start crushing operation.Dynamo-electric paper shredder 1635 can comprise paper crusher motor and kneader bar.Alternatively, paper inlet opening 1610 can arrange infrared sensor 1675, and with similar above, when sensor 1610 detects object in paper inlet gap 1625, this sensor 1675 can be controlled shredded paper operation.

According to explanation herein, Figure 17 is the schematic diagram based on an embodiment 1700 of dielectric constant formula paper shredder control system.Control system 1700 comprises dielectric constant detector 1710, shredder controller (MPU) 1715, and paper crusher motor controller 1720.Paper crusher motor controller 1720 can be connected to paper crusher motor 1725, and can be mechanically attached in turn several kneader bar (not shown).Control system 1700 can comprise positioning indicator, for example, indicator lamp group 1730, it provides the visual indication of shredder state.In addition, control system 1700 can be connected to one or more sensors or control element affects shredder function.Such sensor or control element can provide security function, and it can protect shredder or user to avoid injury.The example of described sensor or control element can include but not limited to, dielectric constant detector 1710, power switch (POWER SW), waste-basket door status switch (DOOR SW), or waste-basket full (JP6 SENSOR).The function treatment software that MPU 1715 is integrated on MPU1715 according to a programmable program provides detection to shredder, and operation is analyzed, indication or control function.A suitable example of MPU1715 can be PIC16F67720-pin, and 8 CMOS microcontrollers of integrated flash memory type internal memory, by Wei Xin scientific & technical corporation, U.S. Qian Dele, AZ (Microchip Technology Inc., Chandler, AZ USA) produces.The example of described PIC16F677 specification and running can find at PIC16F631/677/685/687/689/690, databook: based on 20 pins of flash memory, adopt 8 CMOS microcontrollers of nanowatt technology, DOC. number DS41262E, Wei Xin scientific & technical corporation, Qian De strangles AZ, and 2008, at URL:http: //ww1.microchip.com/downloads/en/DeviceDoc/41262E.pdf is effective on February 2nd, 2011, and data list file is all included this entirety in herein.

Other microcontroller also can be used to, and can be substituted by other ordinary skill of this area.Such as, dielectric constant detector output signal can be received the input RA5 of MPU1715, for identification equipment, also can be designated as pin TICKI.Pin TICKI is connected to concussion dielectric constant detector output signal 1702, and MPU1715 can comprise timer or counter function.

When dielectric constant status signal is connected to the pin TICKI such as the OUT pin 3 to MPU 1715 of the oscillating circuit 1510 from Figure 15, MPU 1715 within the predetermined detection phase by increasing progressively each periodic vibration of numeric counter of being held by MPU counter T1.MPU timer T0 is the detection period predetermining.In the described detection period predetermining, the amplitude of counter T1 sign dielectric constant modulation signal is the number of the periodic vibration that calculates during this period.The number of periodic vibration can be by MPU1715 record, and the numerical value of MPU counter T1 can be reset initial into during the predetermined monitoring of the next one by MPU timer T0 metering afterwards.Conventionally, periodic vibration number is directly proportional to the amplitude of dielectric constant modulation signal, as relates to concussion period T.In selected embodiment, the suitable predetermined detection phase approximately can be 0.065536 second (or 65.536 microseconds) herein.

MPU1715 also can enroll the instruction of microcontroller, when the selected instruction based on MPU is when MPU1715 carries out, and when this instruction is performed in MPU1715, implements to comprise the main program of at least one subprogram.

In a unrestricted embodiment 1700 of concussion element who is used in paper shredder control system, oscillating circuit 1705 can comprise unstable state multi resonant oscillator/timer, for example NE555 timer, it can with executive component R14, R15 and C8 form function circuit jointly.One of ordinary skill in the art can recognize, when R14 resistance value is 10 kilo-ohms, R15 resistance value is 47 kilo-ohms, and when the capacitance of C8 is 33 nanofarad, oscillating circuit 1705 issues a signal to control circuit 1715, and this signal can be the representative of the dielectric constant values of measurement.Control circuit 1715 can coordinate oscillating circuit 1705 to keep regular accurately dielectric constant measurement.One of ordinary skill in the art can recognize, the period T of oscillator 1700 can be estimated by following formula:

$T\&ap;0.7(R14+2\&times;R15)\&times;\frac{\mathrm{\&epsiv;A}}{d}---\left(10\right)$

Wherein, T is the concussion cycle of oscillating circuit 1700;

R14 is the resistance value of resistance R 14;

R15 is the resistance value of resistance R 15;

A is the overlay region of relative hardware;

D is the distance between overlapped metal element;

ε is dielectric constant.

Certainly, R14, R15, A and d can remain roughly fixing.Therefore, the oscillator signal period T of oscillating circuit 1705, changes with the variation of the DIELECTRIC CONSTANTS between the overlay region A of the relative hardware by separating apart from d.Final right-hand rule in equation 1 can contact with electric capacity, has the people of foundation training can understand the function that electric capacity is dielectric constant in electrical engineering field, and dielectric constant and electric capacity are irrelevant.Therefore, the derivative performance of the essential characteristic of dielectric constant and electric capacity is irrelevant, and dielectric constant sensor is not capacitance sensor.Therefore, dielectric constant herein can be described to not reference capacitance, but makes any simplification with reference to being all that the general personnel that principle in order to make the present embodiment is convenient to this area understand.

In Figure 17 system 1700 embodiment, R14 is the resistance of 10 kilo-ohms, and R15 is the resistance of 47 kilo-ohms, although other numerical value also can be used.In an embodiment of paper inlet opening sensor configuration, the common region S of the parallel-plate of sensor 1701 is about 8.2 × 10 ^-3m ², and distance d between plate is about 3.0 × 10 ^-3m.

T≈201，899×ε _r (11)

Obviously, concussion period T is the function of dielectric constant.Therefore, the variation ε of the relative dielectric constant of the material of introducing paper inlet of paper shredder opening on sensor _rcan be reflected as the variation of the concussion period T of oscillating circuit 1705.

When one or when more plurality of sheets of paper is introduced in the air gap d of paper inlet of paper shredder, all there is variation in the content of the air gap d, therefore have at least two dielectric materials that contain separately different value to be placed between the two or more condenser armatures containing total region S on the width in gap and dielectric constant.In this inhomogenous dielectric environment, the first dielectric material (such as air) includes DIELECTRIC CONSTANTS _aIRwith thickness m _aIR, and the second dielectric material (such as one or more paper) includes DIELECTRIC CONSTANTS _pAPERwith thickness m _pAPER.

The period T of oscillating circuit 1705, as the function of dielectric constant and material thickness:

$T\&ap;0.7(R14+2\&times;R15)\&times;\frac{S{\mathrm{\&epsiv;}}_{\mathrm{AIR}}{\mathrm{\&epsiv;}}_{\mathrm{PAPER}2}}{m_{\mathrm{AIR}}{\mathrm{\&epsiv;}}_{\mathrm{PAPER}}+m_{\mathrm{PAPER}}{\mathrm{\&epsiv;}}_{\mathrm{AIR}}}---\left(12\right)$

The impact of capacitor C is left in the basket, and is not used in detection dielectric constant.In the embodiment of the oscillating circuit 1705 of Figure 17, R14 is the resistance of 10 kilo-ohms, and R15 is the resistance of 47 kilo-ohms, although other numerical value also may be used.In the configuration of paper inlet opening sensor, the common region of parallel-plate can be about 8.2 × 10 ^-3m ², equation 12 can be reduced to

$T=605.7\&times;\frac{{\mathrm{\&epsiv;}}_1{\mathrm{\&epsiv;}}_2}{{\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="111129170802.png"\; state="\{\{state\}\}">T</figure-callout>}}_1{\mathrm{\&epsiv;}}_2+{\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="111129170811.png,111129170848.png"\; state="\{\{state\}\}">T</figure-callout>}}_2{\mathrm{\&epsiv;}}_1}---\left(13\right)$

Again, the impact of capacitor C is left in the basket.Obviously, equation 11-16 can represent the improvement of the model of the air/combination of media that may be run into by shredder.Even so, we find the symbol as respective threshold the example of the non-uniform dielectric selected (as, paper+air), can simplify paper sheet thickness and detect and use cheap assembly just enough.

Table 1 has been demonstrated the empirical result obtaining by prototype.

Table 1

The number of paper	Dielectric constant	Δε
			Without (0)	ε≈1.465F/m	N/A
One (1)	ε≈1.506F/m	0.041F/m
			Ten (10)	ε≈1.872F/m	0.407F/m

Table 1 shows that the dielectric constant threshold value recording with dielectric constant detector 1770 is between discernible threshold value, and this discernible threshold value transmits a signal to paper shredder control system 1715 and completes startup, does not does not start or stop the operation of pulverizing.While contrasting with the starting point (initial value) of making by oneself by response, the variation of predetermined threshold dielectric constant, can avoid more complicated model, and the value to other variable, as the dependence of C can be left in the basket, if any.

When being contacted with biophysics by exposed permission as the conductive plate of 1505 in Figure 15 for one, dielectric constant detector 1710 also can provide the security mechanism of touch sensible.Biology sends induced electricity or electrical signal of reaction, and this signal can be used to the operation of control system 1700.This physical contact may facilitate induced electricity to transmit from biology, and is connected to shredder logic control system 1715.To this reaction, motor controller can make shredder power-off or carry out safety stop.

Figure 18 has described a kind of another embodiment 1800 based on dielectric constant formula shredder, and it comprises starting switch 1810 and protection timer 1850.Under such configuration, starting switch 1810 can use in the position of power switch, and can combine timer 1850 operations and make shredder power supply in opening, the state of standby or pass.Described holding state definable one predetermined time interval; in this interval, protect the timer 1850 can measurement count predetermined time, or count down to define the predetermined fixed point time interval, shredder 1800 can be closed after this; and motor 1830 is de-energized, or suspend.A collection of in the predetermined former preliminary election part of expecting paper inlet of paper shredder opening (not shown) of pulverizing of pulverizing between former charge density region by introducing, dielectric constant sensor 1825 can receive or detect a collection of pulverizing raw material, and can cause paper crusher motor 1830 energising and operate.Paper crusher motor 1830 energisings can cause timer 1850 in interval operation scheduled operating time, and in described predetermined time interval, shredder 1800 can keep holding state.Within this time interval, dielectric constant sensor 1825 can restart electro-motor 1830 a collection of pulverizing raw material is pulverized.But, the predetermined fixed point time interval such as 5 minutes after, power supply can disconnect from electro-motor 1830 or logical control devices 1820 or both.Make the electrical equipment of shredder 1800 turn back to open/stand state, starting switch 1810 can be removed by the pass/disabled position from it.

When extra pulverizing raw material is placed into shredder, starting switch 1810 also can be used for restarting pulverizing.Indicator 1880 can be indicated the not pulverizing material density in predetermined dielectric constant range of a collection of dielectric constant values, such as the obstruction at initial stage, and inappropriate pulverizing raw material, or biological.Indicator 1885 can be used for indicating the condition that paper crusher motor 1830 is overheated or transship.Even if do not consider start-up technique, the unsuitable dielectric constant measurement value of using dielectric constant sensing element 1825 to determine, can be used for directing object blocked up, or is not suitable for pulverizing, and causes control system 1875 by dynamo-electric paper shredder 1830 power-off.In certain embodiments, control system 1875 can stop dynamo-electric paper shredder 1830, or causes dynamo-electric paper shredder 1830 reverse operatings to exit kneader bar for making to mince, and then stops using and stops dynamo-electric paper shredder 1830.Safety stop as described in Figure 9, can be caused by dielectric constant formula shredder controller 1875 due to the object being sensed by dielectric constant sensor element 1825.Pulverizing object take paper as representative for example, when introduce the number of paper of paper inlet produce exceed predetermined excessive enter during the dielectric constant of paper threshold value, control system will make motor make a response to overload or blocked state.An example that is not suitable for the object of pulverizing can be a biological part.

Figure 19 has described an a kind of embodiment 1900 of dielectric constant formula shredder, and it comprises starting switch 1910 and fixed point timer 1950.In certain embodiments, starting switch 1910 can be used as power supply open/stand switch and uses, and can be arranged on paper inlet of paper shredder opening.Shredder 1900 can use power switch 1960 and together with starting switch 1910 for power supply.Power switch 1960 can be used to the electrical equipment power supply of shredder 1300 to open or close.In first position of starting switch 1910, such as paper crusher motor of shredder electrical equipment, logic controller or both can be set to holding state.When a collection of pulverizing raw material is introduced into paper inlet of paper shredder opening, starting switch 1910 can be moved to second position of timing switch.On second position, starting switch 1910 can activate dielectric constant sensor 1925, and power supply is connected to paper crusher motor 1930, shredder controller 1920 and fixed point timer 1950.Overload logic device 1975 can determine the existence of overload and activate overload indicator 1980.In addition, overload logic device 1975 can detect the overheated or blocked state of motor and can excite overheat indicator 1985.

A unrestricted example of suitable program or subprocess is shown in Figure 20-34, and the narration relevant to each term diagram.Main program can be connected at least one subprogram.Mono-2000 of the embodiment (Figure 20) of main program, at least can carry out a sub-subroutine process, according to current embodiment, can include but not limited to, " initialization " subprogram 2100 (Figure 21), " door is opened " subprogram 2200 (Figure 22), " overtemperature protection " subprogram 2300 (Figure 23), " Threshold " subprogram 2400 (Figure 24), " machine overload " subprogram 2500 (Figure 25), the subprogram 2600 (Figure 26) of " manually moving back paper ", " machine paperboard " subprogram 2700 (Figure 27), the subprogram 2800 (Figure 28) that " manually enters paper ", " paper is full " subprogram 3200 (Figure 32), " self-lock protection " subprogram 2900 (Figure 29), " paper feed automatically " subprogram 3000 (Figure 30), " time delay paper feed " subprogram 3100 (Figure 31), " dielectric constant is abnormal " subprogram 3300 (Figure 33), or " touch and stop protection " subprogram 3400 (Figure 34).The order that above-mentioned these subprograms are enumerated is only for explaining but not functional specification.As used herein, indicator can be visual detector (as indicator lamp), audio indicator (as buzzer), or audiovisual indicator (such as the figure indicator lamp with sounding clock).

Figure 20 has demonstrated shredder operation, as shredder described herein, and main logic flow.One or more aforesaid subprograms can be performed with main logic flow, include but not limited to, " dielectric constant is abnormal " subprogram, as subprogram 3300 (Figure 33).

When shredder electric power starting, can use " initialization " subprogram 2100, data and status information can be initialised." Threshold " subprogram 2400 arranges operation and the setting parameter of the functional status of system.When reaching the operation of demarcation or parameter value, will enter systemic-function state.If the trigger point of definition shredder function does not arrange, system mode is marked as, and does not limit " Threshold " subprogram 2400 (Figure 24) for setup and use.After initialization, the control of shredder function can turn back to paper shredder control system.

Another subprogram example, in " door is opened " subprogram 2200 (Figure 22), the door on shredder is opened indicator lamp and can be transferred to open, until door is closed.But, if application like this, can press move back paper (shredder direction) key exceed 3 second permanent setting shredder function, this can be by the sudden strain of a muscle of all indicator lamp once be indicated, although other indicating means also can be used.Another subprogram example can carry out illustration by " overtemperature protection " subprogram 2300 (Figure 23).In subprogram 2300, motor overheating indicator lamp can brighten, and paper crusher motor is de-energized, until shredder operator opens the door, checks the malfunction (and most likely finding motor Overheat Reasons) of illustration.When door is opened and then closes, overheating indicator lamp extinguishes, and enters main program.

" Threshold " subprogram 2400 (Figure 24) can be used to, and for example, is the minimum and maximum value of Threshold, it is overheated that described threshold value can be for example motor, motor overload, dielectric constant, automatic or manual function, indicator uses, or warns the delay before being triggered.Until the operation of systemic-function state and setting parameter arrange by this pattern, what user just can repeat accesses systemic-function state value.Therefore, " Threshold " subprogram 2400 can manufactured business, and foundry and supplier use, and can before shredder is provided to terminal use, set.If necessary, " Threshold " subprogram 2400 also can be used to remove and reset threshold function.For example, the value of " test " can be designated as the mean value of incipient machine paperboard.By introducing the dielectric constant sensor that the selected pulverizing raw material number of plies (and composition) enters paper passage to paper inlet, set max-thresholds, the maximum of pulverizing raw material can be set.Similarly, the minimum of a value of the pulverizing raw material number of plies (and composition) can be transfused to and set.Difference between these values has shown the maximum of the pulverizing raw material that just can be pulverized by shredder before obstruction.This is that shredder of the present invention can be used in fact a kind of method of " anti-blocking year ".After " Threshold " subprogram 2400 completes, described shredder function turns back to main program 2000.If there is door, open, motor is overheated, or shredder is overheated, and " Threshold " subprogram will exit and control is turned back to main program 2000.

" machine overload " subprogram 2500 (Figure 25) can be used for identifying shredder overload situations, by opening indicator lamp and automatically making motor reversion (with respect to normal pulverizing behavior) react for approximately 2.5 seconds.If other malfunction is such as door is opened, machine is overheated, plug paper, and the full pattern of manual paper feeding pattern or paper occurs, and one or more time delay paper feed flag bits are set, and overload light goes out, and controls and returns to main program 2000.If shredder operates with automatic paper feed pattern, self-lock protection state is marked and controls and returns to main program 2000.

Subprogram 2600 (Figure 26) can be started by shredder user " manually to move back paper ", for example, by pressing " moving back paper " (or reversion) key, causes that paper crusher motor is to rotating with normal operating rightabout.Subprogram can be used as the alarm of potential potential safety hazard " manually to move back paper ", and when door is opened, the overheated or shredder of motor stops motor during with " manual paper feeding " pattern (as the subprogram 2800 in 28) operation.But, if move back paper control device, be released, if shredder in " manually moving back paper " pattern, as about 2 seconds, or shredder is in " automatically paper feed " pattern (subprogram 3000 in as Figure 30), paper crusher motor can be closed.In " machine paperboard " subprogram 2700, flicker (or the intermittent) indicator lamp of identification overload is bright, or opens when door, during the overheated or cleaning machine paperboard of paper crusher motor, goes out.

" manual paper feeding " subprogram 2800 can start paper crusher motor operation, and paper crusher motor rotates with normal (pulverizing) direction.But, if shredded paper gate is opened, or motor is overheated, or shredder is received " moving back paper " executive signal, or there is machine paperboard to occur, or shredder machine overload, or shredder operates more than in the situation of 5 seconds, and " manual paper feeding " subprogram 2800 can exit and paper crusher motor power-off (and stopping).If under " paper feed automatically " pattern (subprogram 3000 in Figure 30), paper breaking machine waste paper drum is full simultaneously, motor also can power-off stop normal rotation.Otherwise control can be back to main program 2000.Paper breaking machine waste paper drum or container comprise the finite volume that can hold the crushed material of having pulverized, and therefore, " paper is full " subprogram 3200 is by providing therein " full " indication can respond full waste-basket.Shredded paper operation can continue.If pulverize paper material under obstruction or overload condition, still can be detected by the detector, subprogram " self-lock protection " 2900 activates." self-lock protection " the 2900th, if a kind of selected malfunction (as overload) continues, shredder keeps inactive behavior.But, " if dielectric constant is abnormal " (subprogram 3300, Figure 33) received, for example paper crusher motor is overheated, or touch and stop protecting bio signal to produce (subprogram 3400, Figure 34), or shredder is in " manually moving back paper " pattern, or shredder machine paperboard, or shredder is placed into " manual paper feeding " pattern, or paper breaking machine waste paper drum is no longer full, the full indicator lamp of described paper extinguishes, system turns back to main subprogram, if have there malfunction exist (such as, paper crusher motor is overheated), corresponding subprogram is by the malfunction of processing separately, for example, by making paper crusher motor power-off.

In " paper feed automatically " subprogram 3000, introducing appropriate paper after paper inlet, shredder will start automatically, start normal revolution.But, as shown in figure 29, to nonserviceable in situation, revolution stops, and controls and returns to main program 2000.In " time delay paper feed " subprogram 3100, paper crusher motor will start, such as, from the delay in 2.5 seconds of printer cleaning overload.In " paper is full " subprogram 3200, " waste-basket is full " being detected by control circuit for kneading machine starts indicator, such as " fiber drum is full " indicator lamp.Once fiber drum is cleaned, to the minimum point lower than " expiring ", described " fiber drum is full " indicator lamp can extinguish, and controls and returns to main program 2000.In " dielectric constant is abnormal " subprogram 3300, if a dielectric constant breaking bounds is detected, paper crusher motor will stop operating, and indicator lamp glimmers always and is eliminated to this situation; After indicator lamp goes out, motor restart and be ready to running.In " touch and stop protection " subprogram 3400, motor power-off can at least two kinds of modes occur.First, if any touch sensor receives that, from biological induced electricity, sensor transfers the induced electricity of receiving to bio signal, this bio signal can be by controller for starting " touch and stop protection " indicator lamp and making paper crusher motor power-off.Secondly, if in paper feed process, the dielectric constant values detecting exceedes the upper limit of dielectric constant, and then hypothesis has touch, and this touches and produces bio signal, and this signal is used for starting " touch and stop protection " indicator lamp and makes paper crusher motor power-off by controller.Once this situation is eliminated, controls and return to main program 2000.

Being combined under current explanation of above-mentioned safety element is apparent to one of ordinary skill in the art.

Beneficial effect:

Embodiments of the invention provide following useful purposes:

1. improve product for biological security, comprise adult, children and pet.

2. improve the support structure of shredder integral member.

3. improve the structural intergrity of shredder.

4. strengthen product reliability.

5. extend product service life.

6. reduce running cost and the maintenance of product.

As detailed above, describedly based on dielectric constant formula paper shredder control system, adopted series circuit.At machine paper inlet, entering paper channel setting has blade to touch stop sensor, and this sensor is connected to touch-control control circuit, earthed switch circuit, and safety is touched and is stopped protection module, and comprises the paper shredder core of blade stop.Safety when these all circuit have guaranteed people or other biological touch based on dielectric constant formula kneader bar.From the electricity of human body, cause described touch-control control circuit, and then cause all circuit that are attached thereto.Thereby described safety is touched the safety of stopping protection module forbidding paper shredder core and guaranteed people.If when someone contacts dielectric constant formula kneader bar, even electric power starting, paper shredder core still can not turn round.As aforesaid dielectric constant formula panel, shredder can be used the real-time monitoring that realizes the accurate control procedure of safety based on dielectric constant formula kneader bar.The performance of machine is reliable and stable.It can also easily operate when nobody gets involved, and can be applicable to situation widely, and can bring safety assurance.Similarly, when the pulverizing raw material dielectric constant detecting at paper inlet of paper shredder is in predetermined dielectric constant range, dielectric constant formula shredder can turn round, and when a value is defined in outside this scope, it can indicate " dielectric constant is abnormal ".The induction-assisted reduction shredder of dielectric constant stops up, and paper crusher motor is overheated, or the possibility of paper crusher motor overload, extends the life-span of shredder by reducing these stress risers.By accident, dielectric constant induction also can be carried out the tactile defencive function that stops because biological dielectric constant produces dielectric constant exceptional value.One of ordinary skill in the art can be recognized foreseeable modification and replacement in view of above-mentioned disclosure.

Although the present invention specifically describes with way of example, be appreciated that no matter be that specification or accompanying drawing are all not used in restriction.To those skilled in the art, when they have read after foregoing disclosure content, various replacements or modification are apparent.Claims of appendix are interpreted as covering all substitutions and modifications that comprise within the spirit and scope of the present invention.Therefore,, unless these changes and modification depart from scope of the present invention, they should be interpreted as being included in wherein.

Claims (25)

1. be used in the shredder safety guard on shredder, described shredder comprises the paper inlet that can mince for receiving, and this shredder safety guard comprises:

Be arranged on the starting switch of paper inlet, and be configured to can make while contacting with described starting switch when mincing the electrical equipment energising of described shredder;

Dielectric constant sensor, it is configured to receive the electric energy providing, wherein said dielectric constant sensor produces capacitance induction zone, while having changed the medium of described capacitance induction zone when mincing in capacitance induction zone described in dielectric constant sensor cause to mince and pulverized;

With

Timer, is activated by described starting switch, and wherein timer is configured to and the electrical equipment electrical connection of shredder, and wherein said timer is set to after default delay time arrives, and makes the electrical equipment deenergization of shredder.

2. shredder safety guard as claimed in claim 1, further comprises:

Induced electricity cuts off switch, is configured to detect the biological voltage from contacting with the default element of shredder, and is set to can make timer to skip default delay time when with described biological, shows the matured time.

3. shredder safety guard as claimed in claim 1, further comprises:

Be connected to the master board on described dielectric constant sensor, when described master board receives that mincing of dielectric constant sensor changed the indication of capacitance induction zone, described master board causes the pulverizing of can mincing.

4. shredder safety guard as claimed in claim 3, further comprises:

Electro-motor, it is connected between described dielectric constant sensor and described master board, and is configured to electro-motor when energising, starts the pulverizing that can mince, when electro-motor power-off, stops the pulverizing that can mincing.

5. a paper shredder control system, comprising:

Conduction shredder element;

Kneader bar;

Paper shredder core, is connected on described kneader bar, and is set to stop described kneader bar;

Be connected to the control module on described conduction shredder element, it can detect from the biological response electricity on described conduction shredder element, and described control module is connected on described paper shredder core and is configured to respond the induced electricity detecting and stops described kneader bar;

Enter paper passage, be positioned near described paper shredder core,

With

Dielectric constant sensor, described in being arranged on, enter in paper passage, and being connected in described control module, wherein said dielectric constant sensor coordinates response to be inserted into the material of presetting capacitance into exceeding of paper passage and the running that stops described kneader bar together with described control module.

6. paper shredder control system as claimed in claim 5, wherein said paper shredder core further comprises the mechanical stop that includes clutch.

7. paper shredder control system as claimed in claim 5, further comprises:

Electromagnetic motor, it is connected on described paper shredder core and described kneader bar, and wherein revolution drives kneader bar to rotate; With

Electromagnetic braking circuit, the control module of access motor, wherein said control module is configured to cause motor electromagnetic braking, and

Wherein said control module provides the real-time monitoring of essence to contacting between described conduction shredder element and biology, and wherein said control module response biology contacts and causes motor electromagnetic braking with described conduction shredder element.

8. paper shredder control system as claimed in claim 5, wherein:

Described paper shredder core comprises the paper crusher motor that can reverse;

Described control module comprises three sections of switches, and it comprises open and close and reverse three positions;

And described three sections of switches are when the position of opening or reverse position, and described control module can operate the described paper crusher motor that can reverse can not be started.

9. paper shredder control system as claimed in claim 8, wherein:

The described paper crusher motor that reverses is by relay switch control.

10. paper shredder control system as claimed in claim 5, wherein said induced electricity is a kind of by described biogenic electrostatic charge.

11. paper shredder control systems as claimed in claim 5, wherein said induced electricity is a kind of by described biogenic mobile charge.

12. 1 kinds of shredder systems, comprising:

Paper crusher motor;

Kneader bar;

Touch-control control circuit, is connected on described kneader bar;

Biology sensor, is connected on described touch-control control circuit, and response is received from biological induced electricity;

Shredder control module, is connected between described touch-control control circuit and described paper crusher motor; With

Dielectric constant controller, is connected on described shredder control module, and coordinates described shredder control module to stop described paper crusher motor before the material that contains default dielectric constant values is pulverized by described kneader bar,

When biological occurring and induced electricity is applied to described biology sensor, wherein said touch-control control circuit coordinates described shredder control module to stop the running of paper crusher motor.

13. shredder systems as claimed in claim 12, further comprise:

Photo-coupler, be inserted in the electrical path between described biology sensor and described shredder control module, wherein from the electrical signal of reaction of described touch-control control circuit, by photo-coupler, be coupled the paper crusher motor that impels described shredder control module to stop moving.

14. shredder systems as claimed in claim 13, further comprise the earthed switch circuit that is connected in described photo-coupler, this circuit is transferred to described photo-coupler by the electrical signal of reaction of receiving from described touch-control control circuit, and wherein said earthed switch circuit will be coupled to described photo-coupler from the electrical signal of reaction of described touch-control control circuit.

15. shredder systems as claimed in claim 14, wherein said touch-control control circuit further comprises:

Previous stage triode, its base stage is connected on described biology sensor, and its colelctor electrode is connected on power supply, and its emitter stage is connected in the base stage of rear one-level triode, and the emitter stage of wherein said rear one-level triode is connected to the input of photo-coupler.

16. shredder systems as claimed in claim 12, wherein said electrical signal of reaction is a kind of by described biogenic electrostatic charge.

17. shredder systems as claimed in claim 12, wherein said electrical signal of reaction is a kind of by described biogenic mobile charge.

18. 1 kinds of shredder systems, comprising:

Kneader bar;

The paper crusher motor of can powering, is connected on described kneader bar;

Dielectric constant sensor, is connected on described paper crusher motor, and is configured to the described paper crusher motor of can powering of the minced startup within the scope of predetermined capacitance that response receives;

Timer, is connected between described dielectric constant sensor and described motor, is configured to the described paper crusher motor of can powering of stopping using after the predetermined lay-up period of the paper crusher motor of can powering described in;

Biology sensor, the induced electricity that response comes from the biology with bio signal;

Safety is touched and is stopped protection module, and comprising can be for the gauge tap on electric notor described in being connected to; With

Photodetachment device; it is connected in and receives the bio signal of described biology sensor and be configured to electricity and isolates described bio signal and be sent to the tactile protection module that stops of described safety; wherein; when shredder moves; described bio signal impels described safety to touch to stop protection module operation gauge tap the running that stops the described paper crusher motor of can powering, and wherein said gauge tap is magnetic reed switch.

19. shredder systems as claimed in claim 18 are wherein the one in electrostatic charge or mobile charge by described biogenic electrical signal of reaction.

20. 1 kinds by the method based on dielectric constant formula equipment control shredder, comprising:

The paper crusher motor that can power is provided, and described motor can be operating as forward or reverse;

Kneader bar is provided, can be driven by described paper crusher motor of powering;

Connect dielectric constant sensor to described shredder element, wherein said dielectric constant sensor can be switched on by biological electrical signal of reaction;

The control circuit that is connected in described dielectric constant sensor is provided, is configured to receive the bio signal that represents electrical signal of reaction; And

Configure the running that described control circuit responds described dielectric constant sensor and biological contacting and stop the powered paper crusher motor of described forward or reverse.

21. methods of using based on dielectric constant formula equipment control shredder as claimed in claim 20, further comprise:

Between described dielectric constant sensor and voltage, provide electricity isolation, one or two in wherein said voltage-operated described control circuit and described paper crusher motor of powering.

22. 1 kinds of shredder security systems comprise:

Kneader bar;

Reversible paper crusher motor of can powering, is connected on described kneader bar;

Safety control circuit, is connected to described can power supply on reversible paper crusher motor;

Earthed switch circuit, is connected on described safety control circuit;

Touch-control control circuit, be connected on described safety control circuit, and comprise dielectric constant sensor, wherein, when being detected from the biological electrical signal of reaction contacting with described dielectric constant sensor, described safety control circuit drives described earthed switch circuit to stop described reversible paper crusher motor of can powering responsively.

23. shredder security systems as claimed in claim 22, further comprise:

Safety switch, it comprises the electric member being connected on described safety control circuit and the mechanical component that is connected to shredder cabinet coupling part near-end and matches, described in wherein when the cooperation multilated of described mechanical component and described coupling part, electric member TRANSEC transmission security switching signal is to described safety control circuit, and described safety control circuit is enabled described control circuit and stops the running of described reversible paper crusher motor of can powering, and wherein said electric member comprises described dielectric constant sensor.

24. shredder security systems as claimed in claim 23, wherein touch and stop inductive pick-up and be connected to kneader bar, the shredder base construction of metal, at least one in kneader bar pad or the metal blade spacer of metal.

25. 1 kinds of shredders, comprising:

Be arranged on the starting switch on shredder, and while being configured to contact with described starting switch when mincing, described starting switch is sent to induced electricity on the electrical equipment of shredder;

Dielectric constant sensor, be configured to receive above-mentioned induced electricity, wherein said dielectric constant sensor generates capacitance induction zone, minces while having changed the medium of described capacitance induction zone therein when described, and described dielectric constant sensor can order about the movement pulverizing of can mincing;

Timer, is activated by described starting switch, wherein said timer be set to default delay time to after from the electrical equipment of described shredder, disconnect electric power; And

Described shredder is at the shredder base construction of metal, and the kneader bar pad of metal or at least one of metal blade spacer comprise conductive member;

Touch-control control circuit, can respond from biology and reach the electrical signal of reaction described conductive member, wherein said touch-control control circuit is configured to from the electrical equipment of shredder, disconnect electric power in response to the electrical signal of reaction of receiving from described conductive member, and wherein shredder is autonomous.

Images