CN105581908A - Device and method for controlling electric squeezing device of traditional Chinese medicine decoction equipment - Google Patents
Device and method for controlling electric squeezing device of traditional Chinese medicine decoction equipment Download PDFInfo
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- CN105581908A CN105581908A CN201610063921.1A CN201610063921A CN105581908A CN 105581908 A CN105581908 A CN 105581908A CN 201610063921 A CN201610063921 A CN 201610063921A CN 105581908 A CN105581908 A CN 105581908A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J3/00—Devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
- A61J2200/00—General characteristics or adaptations
- A61J2200/20—Extrusion means, e.g. for producing pharmaceutical forms
Abstract
The invention discloses a device and method for controlling an electric squeezing device of traditional Chinese medicine decoction equipment. An ejector pin is installed inside an outer sleeve and abuts against a lead screw stand-off on the top of a lead screw, the lead screw touches the ejector pin after moving upwards, the displacement position of the ejector pin is detected by a photoelectric switch in control connection with a single-chip microcomputer control circuit, and the single-chip microcomputer control circuit controls a motor to stop through a motor control circuit to achieve upward limitation; meanwhile, a spring is installed over the ejector pin; the control device is further provided with a current detection circuit, the current detection circuit detects motor current signals and then transmits the motor current signals to the single-chip microcomputer control circuit, and the single-chip microcomputer control circuit controls the motor to stop through the motor control circuit so as to achieve downward limitation when the current output of the motor reaches a set maximum current limit line. A smaller displacement control scheme is adopted and suitable for narrow space, the motor is controlled through current detection, the application of a force sensor is omitted, and installation and design difficulty is reduced.
Description
[technical field]
The present invention is a kind of control device and method of Traditional Chinese medicine decocting equipment electric extruder, is applicable to the equipment for decocting Chinese traditional herb medicines such as Traditional Chinese medicine decocting, traditional Chinese medicine extraction.
[background technology]
Chinese medicine is the essence of Chinese culture, a lot of diseases are in order to reach better curative effect, with the various especial patients of reply, all adopting to take traditional Chinese medicine concoction is main treatment means, reach the conditioning vital organs of the human body, thereby effect getting rid of illness, but due to all difficulties of the aspect of oneself boiling medicine, accept to people to have brought obstruction, such as, Chinese medicine taste is large, while boiling medicine, the duration and degree of heating is difficult to hold, concoction can not be extruded completely, cause waste etc., in the face of this series of problems, thereby develop type hand intelligent temperature control drug-decocting equipment, thereby support being engaged in for decoction of hospital, and common people decoct demand for services to generation and show a rising trend, in order to meet the need of market, with comply with high-tech automation route, on the basis of previous generation drug-decocting equipment, research and develop a kind of pressurizing unit of controllable pressure, the deficiency wasting time and energy to make up manual squeezing, and can regulate as required different squeeze pressures in extrusion process.
Be mainly manual squeezing control in the market, part adopts electric extrusion control.
Manual squeezing realizes the extruding drug in the process of boiling medicine, the large problem of labour intensity in existence, a people need to be responsible at most the running of 8 drug-decocting equipments every day, by the decoction process of 30 minutes 1 pair of Chinese medicine, do not pay in decocting for Chinese herbal medicine process and need to push 1-2 time midway, before finishing, extruding is calculated for 1 time, one day 8 hours needs of work are about the work of the wheel disc extruding of more than 300 time, because of labour intensity large, may exist the problem of slacking off, affect the recovery rate of Chinese medicine drug, cannot ensure the stability of decocting for Chinese herbal medicine quality, by the Normalization that is unfavorable for that traditional Chinese medicine decocts.
Electric extrusion control is mainly the control problem that solves motor, adopts in the market approach switch control upper and lower displacement, and the control of approach switch exists problem to be had:
1, the inaccurate problem in control position, the Position Control moving up and down is difficult, and the extruding of Chinese medicine cannot be controlled dynamics accurately;
2, malfunctioning switch after switch displacement, and may cause the problem such as damage of gearing;
3, be arranged on outer sleeve 4 outsides, affect aesthetics and may be subject to colliding with of outside external force, further affected precision simultaneously.
[summary of the invention]
The object of the invention is to solve problems of the prior art, design a kind of control device and control method thereof of Traditional Chinese medicine decocting equipment electric extruder of new structure.
For achieving the above object, design a kind of control device of Traditional Chinese medicine decocting equipment electric extruder, it is characterized in that, by thimble, spring, optoelectronic switch, single chip machine controlling circuit, motor, circuit for controlling motor composition, adopt thimble to transmit displacement, on the plate of the outer sleeve top installation rolling bearing of electric extruder, be equipped with the room of thimble displacement, thimble is arranged on outer sleeve inside, offset with screw mandrel top screw mandrel bell alive, in the time that screw mandrel moves up, touch thimble, detected the position of thimble displacement by optoelectronic switch, optoelectronic switch and single chip machine controlling circuit control connection, single chip machine controlling circuit stops by circuit for controlling motor control motor, realize to upper limit, on the top of thimble, spring is installed simultaneously, at screw mandrel during to bottom offset, thimble is suppressed to reset, realization repeats to control, described control device is also provided with current detection circuit, described current detection circuit detects motor current signal, and transfer to single chip machine controlling circuit, in the time that the electric current output of motor arrives the maximum current restraining line setting, single chip machine controlling circuit stops by circuit for controlling motor control motor, realize to lower limit.
In described single chip machine controlling circuit, use the core control of ARM kernel 32 level controllers as whole system, 5 of controller, 6 interfaces are connected in series capacitor C 6 and C7 successively, and tap one end ground connection, while also connects crystal oscillator Y1 formation crystal oscillating circuit, the VSS interface of controller and NRST interface ground connection, VDD interface connects 3.3V electricity, NI1, NI2, ENA is as Electric Machine Control pin, CH2 detects pin as current of electric, PT1 is as LOAD CELLS interface, main feature is that its high accuracy is with high-speed, can make fast switching by the variation of detection electric current and control motor rotation.
In described circuit for controlling motor, use the H bridge circuit of four high-power FET Q1, Q2, Q3, Q4 and MOT1 composition to drive as the power stage of motor, high-power FET Q1, Q2, Q4, Q3 are connected in series in turn between two, Q1 and Q2 tap one end are connected to 1 pin of MOT1, Q3 and Q4 tap one end are connected to 3 pin of MOT1, between 1 pin of MOT1 and 3 pin, be connected in series by capacitor C M, between 1 pin of described Q1, MOT1, between tap one end and Q1, Q3, tap one end is simultaneously and connecting resistance RM1 and the group of connecting of capacitor C M1, a diode DM1; Between 1 pin of described Q2, MOT1, between tap one end and Q2, Q4, tap one end is simultaneously and the group of connecting of connecting resistance RM2 and capacitor C M2, diode DM2, a resistance R M6, capacitor C M6; Between 3 pin of described Q3, MOT1, between tap one end and Q1, Q3, tap one end is simultaneously and connecting resistance RM3 and the group of connecting of capacitor C M3, a diode DM3; Between 3 pin of described Q4, MOT1, between tap one end and Q2, Q4, tap one end is simultaneously and the group of connecting of connecting resistance RM4 and capacitor C M4, diode DM4, a resistance R M5, capacitor C M5; By to four high-power FET Q1, Q2, Q3, the control of Q4 makes MOT1 two ends occur different level, thereby controls motor positive and inverse.
Current detection circuit, use rail-to-rail amplifier amplifying circuit faint current signal to be amplified so that controller detects, signal is inputted from signal input part CH1, export from signal output part CH2, signal input part CH1 is connected to the positive pole of amplifier U7A, the output of amplifier U7A is connected in series to the positive pole of amplifier U7B by resistance R 18, and the output of amplifier U7B is connected to signal output part CH2 by resistance R 19; Series resistor R15 between the negative pole of amplifier U7A and output, and tap one end is via resistance R 14 ground connection, No. 8 ports of amplifier U7A are via capacitor C 5 ground connection, No. 4 port ground connection of amplifier U7A; Series resistor R17 between the negative pole of amplifier U7B and output, and tap one end is via resistance R 16 ground connection, tap one end shunt-wound capacitance C10 ground connection, polar capacitor C14 ground connection between resistance R 19 and signal output part CH2; The other end of signal input part CH1 is via capacitor C 1 ground connection, and the other end of signal output part CH2 is via Zener diode D5 ground connection.
Electric machine spacing circuit, detects reset motor state with infrared photoelectric sensor, thereby signal is sent to controller, the IR1 of light emitting diode, and IC1 end is powered for photoelectric sensor, and the RA of photoelectric sensor is signal output part output signal.
Single chip machine controlling circuit also can connect LOAD CELLS circuit, a kind of is the output of 4-20MA electric current, another kind is 0-5V Voltage-output, adopt if electric current to export, signal is inputted from signal input part Ain, export from signal output part Aout, it is sampling resistor that signal input part Ain is connected to R3, sample after voltage, resistance is the words of 270 ohm, the full scale of 20MA adopt voltage be 5.4V, at process R1, the voltage of R2 dividing potential drop approximates 3.24V, this voltage just can enter single-chip microcomputer and carry out computing and control, D1 is a Zener diode, prevent that high level pulse from entering single-chip microcomputer, in order to avoid single-chip microcomputer is out of order, or damage single-chip microcomputer, C1, C2 is as shunt capacitance filter action, filtering interfering, make input signal more stable. if sensor is 0-5V Voltage-output, directly remove R3, allow signal directly pass through R1, R2 dividing potential drop, 5V full scale after dividing potential drop probably in about 3V. Aout exports single-chip simulation input pin to.
Described control device is also provided with the travel switch of safeguard protection, and travel switch is arranged on the extruding motor fixing plate top of electric extruder, and in motor upper cover cover, in the time opening upper cover cover, travel switch cuts off the power supply of motor, plays the effect of safeguard protection.
The control method of the above-mentioned control device of stating Traditional Chinese medicine decocting equipment electric extruder, is characterized in that, adopts the method for machine driving displacement of thimble, and the detection control that current of electric changes combines, and comprises to upper limit control and to lower limit control
A is to upper limit control
Adopt thimble to transmit displacement, in the time that screw mandrel moves up, touch thimble, detected the position of thimble displacement by optoelectronic switch, optoelectronic switch is by microcomputer circuit control, the rotation of disable motor, realize to the object of upper limit, on the top of thimble, spring is installed, at screw mandrel during to bottom offset simultaneously, thimble is suppressed to reset, effectively realized the repeatability of controlling;
B is to lower limit control
In the time that screw mandrel moves down, pass to pressing plate dish by inner sleeve, pressing plate dish touches after the dregs of a decoction of bottom, by current detection circuit, the variation of current of electric detected, according to the size of the size control extruding force changing, and be provided with maximum current restraining line, in the time that the electric current output of motor arrives the maximum current restraining line setting, the rotation of chip controls instruction disable motor, realizes the object to lower limit.
To lower limit control, also can combine to realize with LOAD CELLS control, LOAD CELLS is obtained voltage from CH1 by sampling resistor R16 and is amplified through 1 grade of direct proportion amplifying circuit of amplifier, and multiplication factor is by R15, R14 is definite, and regulated output voltage signal is followed in the second level.
The present invention adopts smaller and more exquisite displacement control program, be applicable in narrow space, cross the mode control motor that detects electric current, save the application of power sensor, reduced the difficulty of mounting design, realized the electronically controlled while, improve control accuracy, improve repeatability, facilitated the operability of equipment for decocting Chinese traditional herb medicines, liberated the high-intensity labour of a part of decocting for Chinese herbal medicine. This patent adopts the method for machine driving displacement of thimble, and the scheme that combines of the detection control that changes of current of electric, also can combine to realize with LOAD CELLS control, has solved in decocting for Chinese herbal medicine process, precisely the control problem of extruding:
1, control thimble and be arranged in outer sleeve, protected its impact that is not subject to external force, realize the object of precisely controlling;
2, the installation site of thimble is smaller, is suitable for and is arranged in smaller space, and change displacement by physics mode, has improved its repeatability of precisely controlling;
3, detect by single-chip microcomputer the curent change that gathers motor; become the form of voltage to export to accurately single-chip microcomputer the current conversion of collection, control the limit of its upper and lower displacement, played the effect of safeguard protection; strengthen operability, be conducive to further realize automation control.
[brief description of the drawings]
Fig. 1 is thimble structure of the detecting device figure of the present invention
Fig. 2 is circuit for controlling motor figure
Fig. 3 is current detection circuit figure
Fig. 4 is electric machine spacing circuit diagram
Fig. 5 is single chip machine controlling circuit figure
Fig. 6 is control flow chart
Fig. 7 is mounting structure figure
Fig. 8 is partial enlarged drawing
Fig. 9 is LOAD CELLS circuit diagram
Description of symbols in figure
| Sequence number | Title | Sequence number | Title |
| 1 | Outer sleeve | 9 | Drive sprocket |
| 2 | Inner sleeve | 10 | By movable sprocket |
| 3 | Screw mandrel | 11 | Platen plate |
| 4 | Screw mandrel bell alive | 12 | The bung of boiling medicine |
| 5 | Thimble | 13 | The bucket of boiling medicine |
| 6 | Spring | 14 | Travel switch |
| 7 | Optoelectronic switch | 15 | Extruding motor fixing plate |
| 8 | Motor | 16 | Motor upper cover cover |
[detailed description of the invention]
Now by reference to the accompanying drawings and embodiment technical scheme of the present invention is further elaborated, believe it is clearly for a person skilled in the art.
The control device of Traditional Chinese medicine decocting equipment electric extruder, as Fig. 1, 7, shown in 8, adopt thimble 5 to transmit displacement, on the plate of the outer sleeve 1 top installation rolling bearing of electric extruder, be equipped with the room of thimble 5 displacements, thimble 5 is arranged on outer sleeve 1 inside, offset with screw mandrel 3 top screw mandrels bell 4 alive, in the time that screw mandrel 3 moves up, touch thimble 5, detected the position of thimble 5 displacements by optoelectronic switch 7, optoelectronic switch 7 and single chip machine controlling circuit control connection, single chip machine controlling circuit stops by circuit for controlling motor control motor 8, realize to upper limit, on the top of thimble, spring 6 is installed simultaneously, spring 6 is controlled thimble 5 in the time of touchless pressure, all the time in accepting the position of displacement, the touching of the bell 4 of living is detected in one end, touched rear generation displacement upwards, the other end turns to data by optoelectronic switch 7 detecting position transfers and passes to control circuit, by stopping of control circuit control motor 8, at screw mandrel 3 during to bottom offset, thimble 5 is suppressed to reset, realization repeats to control, described control device is also provided with current detection circuit, described current detection circuit detects motor current signal, and transfer to single chip machine controlling circuit, in the time that the electric current output of motor arrives the maximum current restraining line setting, single chip machine controlling circuit stops by circuit for controlling motor control motor, realize to lower limit.
In described single chip machine controlling circuit, use the core control of ARM kernel 32 level controllers as whole system, 5 of controller, 6 interfaces are connected in series capacitor C 6 and C7 successively, and tap one end ground connection, while also connects crystal oscillator Y1 formation crystal oscillating circuit, the VSS interface of controller and NRST interface ground connection, VDD interface connects 3.3V electricity, NI1, NI2, ENA is as Electric Machine Control pin, CH2 detects pin as current of electric, PT1 is as LOAD CELLS interface, main feature is that its high accuracy is with high-speed, can make fast switching by the variation of detection electric current and control motor rotation.
As shown in Figure 2, in described circuit for controlling motor, use the H bridge circuit of four high-power FET Q1, Q2, Q3, Q4 and MOT1 composition to drive as the power stage of motor, high-power FET Q1, Q2, Q4, Q3 are connected in series in turn between two, Q1 and Q2 tap one end are connected to 1 pin of MOT1, Q3 and Q4 tap one end are connected to 3 pin of MOT1, between 1 pin of MOT1 and 3 pin, be connected in series by capacitor C M, between 1 pin of described Q1, MOT1, between tap one end and Q1, Q3, tap one end is simultaneously and connecting resistance RM1 and the group of connecting of capacitor C M1, a diode DM1; Between 1 pin of described Q2, MOT1, between tap one end and Q2, Q4, tap one end is simultaneously and the group of connecting of connecting resistance RM2 and capacitor C M2, diode DM2, a resistance R M6, capacitor C M6; Between 3 pin of described Q3, MOT1, between tap one end and Q1, Q3, tap one end is simultaneously and connecting resistance RM3 and the group of connecting of capacitor C M3, a diode DM3; Between 3 pin of described Q4, MOT1, between tap one end and Q2, Q4, tap one end is simultaneously and the group of connecting of connecting resistance RM4 and capacitor C M4, diode DM4, a resistance R M5, capacitor C M5; By to four high-power FET Q1, Q2, Q3, the control of Q4 makes MOT1 two ends occur different level, thereby controls motor positive and inverse.
Push rear motor and needed return, so need positive and reverse rotation control circuit to carry out the operation of drive motors, rotating and reverse by transmission device of motor connects and rotary screw 3, the positive and negative screw mandrel bell 4 alive that rotarily drives of screw mandrel 3 moves up and down, screw mandrel bell 4 alive is fixed on inner sleeve 2 upper ends, inner sleeve 3 lower end fixed platen plates 11, push the Chinese medicine decocting in boiling machine inner bag 13 by platen plate 11, reach the object that improves traditional Chinese medicine extraction rate.
Motor, by circuit for controlling motor Fig. 2, rotates drive sprocket 9, passes through chain by drive sprocket, drive by movable sprocket 10, by movable sprocket 10 connection wire rods 3, screw mandrel 3 drive lead screws bell 4 alive, screw mandrel bell 4 transmission inner sleeves 2 alive, inner sleeve 2 is realized the object of extruding Chinese medicine dregs with dynamic pressure plate dish 11.
As shown in Figure 3, current detection circuit, current detecting needs sampling resistor and operational amplification circuit, makes the current conversion gathering become the form of voltage to export to accurately single-chip microcomputer. Use rail-to-rail amplifier amplifying circuit faint current signal to be amplified so that controller detects, signal is inputted from signal input part CH1, export from signal output part CH2, signal input part CH1 is connected to the positive pole of amplifier U7A, the output of amplifier U7A is connected in series to the positive pole of amplifier U7B by resistance R 18, and the output of amplifier U7B is connected to signal output part CH2 by resistance R 19; Series resistor R15 between the negative pole of amplifier U7A and output, and tap one end is via resistance R 14 ground connection, No. 8 ports of amplifier U7A are via capacitor C 5 ground connection, No. 4 port ground connection of amplifier U7A; Series resistor R17 between the negative pole of amplifier U7B and output, and tap one end is via resistance R 16 ground connection, tap one end shunt-wound capacitance C10 ground connection, polar capacitor C14 ground connection between resistance R 19 and signal output part CH2; The other end of signal input part CH1 is via capacitor C 1 ground connection, and the other end of signal output part CH2 is via Zener diode D5 ground connection.
As shown in Figure 4, electric machine spacing circuit, detects reset motor state with infrared photoelectric sensor, thereby signal is sent to controller, the IR1 of light emitting diode, and IC1 end is powered for photoelectric sensor, and the RA of photoelectric sensor is signal output part output signal. When motor return, reach highest order and make to send a signal to single-chip microcomputer, thus the operation of disable motor.
As shown in Figure 9, single chip machine controlling circuit also can connect LOAD CELLS circuit, sensor is on the market mostly two kinds of output modes, a kind of is the output of 4-20MA electric current, another kind is 0-5V Voltage-output, adopt if electric current to export, signal is inputted from signal input part Ain, export from signal output part Aout, it is sampling resistor that signal input part Ain is connected to R3, sample after voltage, resistance is the words of 270 ohm, the full scale of 20MA adopt voltage be 5.4V, at process R1, the voltage of R2 dividing potential drop approximates 3.24V, this voltage just can enter single-chip microcomputer and carry out computing and control, D1 is a Zener diode, prevent that high level pulse from entering single-chip microcomputer, in order to avoid single-chip microcomputer is out of order, or damage single-chip microcomputer, C1, C2 is as shunt capacitance filter action, filtering interfering, make input signal more stable. if sensor is 0-5V Voltage-output, directly remove R3, allow signal directly pass through R1, R2 dividing potential drop, 5V full scale after dividing potential drop probably in about 3V. Aout exports single-chip simulation input pin to.
Described control device is also provided with the travel switch 14 of safeguard protection; travel switch 14 is arranged on extruding motor fixing plate 15 tops of electric extruder, in motor upper cover cover 16, in the time opening upper cover and overlap 16; travel switch 14 cuts off the power supply of motor, plays the effect of safeguard protection.
The control method of the control device of above-mentioned Traditional Chinese medicine decocting equipment electric extruder, is characterized in that, adopts the method for machine driving displacement of thimble, and the detection control that current of electric changes combines, and comprises to upper limit control and to lower limit control
A is to upper limit control
Adopt thimble 5 to transmit displacement, in the time that screw mandrel 3 moves up, touch thimble 5, detected the position of thimble 5 displacements by optoelectronic switch 7, optoelectronic switch 7 is by microcomputer circuit control, the rotation of disable motor 8, realize to the object of upper limit, on the top of thimble, spring 6 is installed, at screw mandrel 3 during to bottom offset simultaneously, thimble 5 is suppressed to reset, effectively realized the repeatability of controlling;
B is to lower limit control
In the time that screw mandrel 3 moves down, pass to pressing plate dish 11 by inner sleeve 2, pressing plate dish 11 touches after the dregs of a decoction of bottom, by current detection circuit, the variation of current of electric detected, according to the size of the size control extruding force changing, and be provided with maximum current restraining line, in the time that the electric current output of motor arrives the maximum current restraining line setting, the rotation of chip controls instruction disable motor 5, realizes the object to lower limit.
To lower limit control, also can combine to realize with LOAD CELLS control, LOAD CELLS is obtained voltage from CH1 by sampling resistor R16 and is amplified through 1 grade of direct proportion amplifying circuit of amplifier, and multiplication factor is by R15, R14 is definite, and regulated output voltage signal is followed in the second level.
Claims (9)
1. a control device for Traditional Chinese medicine decocting equipment electric extruder, is characterized in that, by thimble, spring, optoelectronic switch, listSheet machine control circuit, motor, circuit for controlling motor composition, adopt thimble (5) to transmit displacement, outside electric extruderThe room that is equipped with thimble (5) displacement on the plate of sleeve (1) top installation rolling bearing, thimble (5) is arranged on outer sleeve(1) inside, offsets with screw mandrel (3) top screw mandrel bell alive (4), in the time that screw mandrel (3) moves up, touches thimble(5), detected the position of thimble (5) displacement by optoelectronic switch (7), optoelectronic switch (7) and single chip machine controlling circuit controlSystem connects, and single chip machine controlling circuit stops by circuit for controlling motor control motor (8), realizes to upper limit, exists simultaneouslyThe top of thimble is provided with spring (6), during to bottom offset, thimble (5) is suppressed to reset at screw mandrel (3), realizes heavyMultiple control, described control device is also provided with current detection circuit, and described current detection circuit detects motor current signal, andTransfer to single chip machine controlling circuit, in the time that the electric current output of motor arrives the maximum current restraining line setting, Single-chip ControllingCircuit stops by circuit for controlling motor control motor, realizes to lower limit.
2. the control device of a kind of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that, described monolithicIn machine control circuit, use the core control of ARM kernel 32 level controllers as whole system, 5,6 interfaces of controllerBe connected in series successively capacitor C 6 and C7, and tap one end ground connection, the while also connects crystal oscillator Y1 formation crystal oscillating circuit, controlsThe VSS interface of device and NRST interface ground connection, VDD interface connects 3.3V electricity, NI1, NI2, ENA is as Electric Machine Control pin,CH2 detects pin as current of electric, and PT1 is as LOAD CELLS interface, and main feature is that its high accuracy is with high-speed,Can make fast switching by the variation of detection electric current and control motor rotation.
3. the control device of a kind of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that, described motorIn control circuit, use the H bridge circuit of four high-power FET Q1, Q2, Q3, Q4 and MOT1 composition as electricityThe power stage of machine drives, and high-power FET Q1, Q2, Q4, Q3 are connected in series in turn between two, and Q1 and Q2 tap one end connectBe connected to 1 pin of MOT1,3 pin that Q3 and Q4 tap one end are connected to MOT1, pass through between 1 pin of MOT1 and 3 pinCapacitor C M serial connection, also connecting resistance RM1 of tap one end while between tap one end and Q1, Q3 between 1 pin of described Q1, MOT1With the group of connecting of capacitor C M1, a diode DM1; Between 1 pin of described Q2, MOT1, between tap one end and Q2, Q4, take outFirst end simultaneously and the group of connecting of connecting resistance RM2 and capacitor C M2, diode DM2, a resistance R M6, capacitor C M6;Between 3 pin of described Q3, MOT1, between tap one end and Q1, Q3, tap one end is simultaneously and the string of connecting resistance RM3 and capacitor C M3Joint group, a diode DM3; Between 3 pin of described Q4, MOT1, between tap one end and Q2, Q4, tap one end is simultaneously and connectThe group of connecting of resistance R M4 and capacitor C M4, diode DM4, a resistance R M5, capacitor C M5; By to four large meritsRate FET Q1, Q2, Q3, the control of Q4 makes MOT1 two ends occur different level, thereby controls motor positive and inverse.
4. the control device of a kind of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that current detectingCircuit, uses rail-to-rail amplifier amplifying circuit that faint current signal is amplified so that controller detects, and signal is inputted from signalEnd CH1 input, from signal output part CH2 output, signal input part CH1 is connected to the positive pole of amplifier U7A, amplifierThe output of U7A is connected in series to the positive pole of amplifier U7B by resistance R 18, and the output of amplifier U7B is by resistance R 19Be connected to signal output part CH2; Series resistor R15 between the negative pole of amplifier U7A and output, and tap one end viaResistance R 14 ground connection, No. 8 ports of amplifier U7A are via capacitor C 5 ground connection, No. 4 port ground connection of amplifier U7A;Series resistor R17 between the negative pole of amplifier U7B and output, and tap one end is via resistance R 16 ground connection, resistance R 19And tap one end shunt-wound capacitance C10 ground connection, polar capacitor C14 ground connection between signal output part CH2; Signal input part CH1The other end via capacitor C 1 ground connection, the other end of signal output part CH2 is via Zener diode D5 ground connection.
5. the control device of a kind of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that electric machine spacingCircuit, detects reset motor state with infrared photoelectric sensor, thereby signal is sent to controller, light emitting diodeIR1, IC1 end is powered for photoelectric sensor, the RA of photoelectric sensor is signal output part output signal.
6. the control device of a kind of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that, single-chip microcomputer controlCircuit processed also can connect LOAD CELLS circuit, and when adopting electric current to export, signal is from signal input part Ain input, from letterNumber output terminals A out output, it is sampling resistor that signal input part Ain is connected to R3, sample after voltage, resistance is270 ohm, the full scale of 20MA adopt voltage be 5.4V, through R1, the voltage of R2 dividing potential drop approximates 3.24V,This voltage just can enter single-chip microcomputer and carry out computing and control, and D1 is a Zener diode, prevents that high level pulse from enteringSingle-chip microcomputer, in order to avoid single-chip microcomputer is out of order, or damages single-chip microcomputer, C1, and C2 is as shunt capacitance filter action, and filtering is dryDisturb, make input signal more stable, when sensor is 0-5V Voltage-output, directly remove R3, allow signal directly pass throughR1, R2 dividing potential drop, 5V full scale is probably in 3V left and right after dividing potential drop, and Aout exports single-chip simulation input to and drawsPin.
7. the control device of a kind of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that, described controlDevice is also provided with the travel switch (14) of safeguard protection, and travel switch (14) is arranged on the extruding motor of electric extruderFixed head (15) top, in motor upper cover cover (16), in the time opening upper cover cover (16), travel switch (14) is cutThe power supply of power machine, plays the effect of safeguard protection.
8. a control method for the control device of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 1, is characterized in that,Adopt the method for machine driving displacement of thimble, and the detection control that current of electric changes combines, comprise to upper limit controlSystem and to lower limit control
A is to upper limit control
Adopt thimble (5) to transmit displacement, in the time that screw mandrel (3) moves up, touch thimble (5), by optoelectronic switch (7)Detect the position of thimble (5) displacement, optoelectronic switch (7) is by microcomputer circuit control, and the rotation of disable motor (8) is realNow, to the object of upper limit, spring (6) is installed simultaneously on the top of thimble, at screw mandrel (3) during to bottom offset, by thimble(5) suppress reset, effectively realized the repeatability of controlling;
B is to lower limit control
In the time that screw mandrel (3) moves down, pass to pressing plate dish (11) by inner sleeve (2), pressing plate dish (11) touches bottomThe dregs of a decoction after, by current detection circuit, the variation of current of electric detected, according to the size of size control extruding force changing,And be provided with maximum current restraining line, and in the time that the electric current output of motor arrives the maximum current restraining line setting, chip controls instructionThe rotation of disable motor 5, realizes the object to lower limit.
9. the control method of the control device of Traditional Chinese medicine decocting equipment electric extruder as claimed in claim 7, to lower limit control, itsBe characterised in that, also can combine to realize control with LOAD CELLS, LOAD CELLS is got by sampling resistor R16 from CH1Obtain voltage and amplify through 1 grade of direct proportion amplifying circuit of amplifier, multiplication factor is by R15, and R14 is definite, and the second level is followed stableOutput voltage signal.
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