CN201045173Y - Laundry machine clothings automatic weight testing control device - Google Patents
Laundry machine clothings automatic weight testing control device Download PDFInfo
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- CN201045173Y CN201045173Y CNU2007201039042U CN200720103904U CN201045173Y CN 201045173 Y CN201045173 Y CN 201045173Y CN U2007201039042 U CNU2007201039042 U CN U2007201039042U CN 200720103904 U CN200720103904 U CN 200720103904U CN 201045173 Y CN201045173 Y CN 201045173Y
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- laundry
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Abstract
The utility model relates to a detecting and controlling device used for automatic weighing of clothes in the washing machine, which employs a displacement sensor to weigh and belongs to the technical field of household appliance. The utility model comprises an amplifying rectification circuit, an amplifying filtering circuit, an amplifying circuit, a setting circuit used for setting moving and placing comparative values, an MCU interface circuit and an oscillating circuit. The utility model is characterized in that an outlet of a single chip provided in the setting circuit used for setting moving and placing comparative values is in parallel connection with a magnification resistor, and composes a voltage controlling circuit with the controlling end of a computing amplifying circuit arranged in the amplifying circuit, wherein the outlet end of the amplifying circuit forms a ring-closure controlling circuit by being connected with the outlet of the single chip provided in the setting circuit used for setting moving and placing comparative values via an insulating resistance. The utility model has the advantages of simple structure, low costs, higher measurement accuracy and the like. The circuit can be widely used in miscellaneous weighing places, in particular in barrel washing machines.
Description
Technical field
The utility model relates to a kind of laundry of washing machine that adopts displacement transducer to weigh detection control apparatus of weighing automatically, belongs to household electrical appliance technical field.
Background technology
The Weighing method that present roller washing machine is being used can be referring to Chinese patent CN1690291A, it a kind of Weighing method of washing machine is disclosed and realize this method washing machine it displacement transducer and air damping oscillator are united two into one, can detect clothes weight and inflow, it comprises casing, outer bucket, two resiliency supported dampers, interior cylinder, transmission gear for electric motor etc.; One of them resiliency supported damper is the air damp type of band displacement transducer, and displacement transducer is connected with microprocessor through Weighing module.Also have a kind of washing machine it to disclose a kind of washing machine that can weigh and have the enhancing piston rod automatically referring to Chinese patent ZL200420072922, this scheme and a last scheme are basic identical also to be that displacement transducer and air damping oscillator are united two into one, and can detect clothes weight and inflow.There is following defective jointly in they: 1, displacement transducer is had relatively high expectations; 2, detect the bad measure error that is easy to generate synchronously.
Summary of the invention
At the deficiency of prior art, the utility model provides a kind of can be simplified displacement transducer requirement, laundry of washing machine that automaticity the is high detection control apparatus of weighing automatically.
Technical characterictic of the present utility model is to design the synchronous control switch loop, weighing initially, makes the original state of Weighing module and COMPUTER DETECTION synchronous, has avoided owing to the asynchronous error that produces with COMPUTER DETECTION of the original state of Weighing module.
The laundry of washing machine detection control apparatus of weighing automatically, by the amplification rectification circuit that links with the displacement transducer output, with amplify the amplification filtering circuit that rectification circuit links, the amplifying circuit that links with the amplification filtering circuit, the amplifier fiducial value initialization circuit that links with amplifying circuit, the MCU interface circuit that links with amplifier fiducial value initialization circuit, and oscillating circuit constitutes.
Amplify rectification circuit and connected successively by amplifying circuit and rectification circuit and constitute, amplifying circuit is made of the computing amplification circuit; Rectification circuit is made of crystal rectifier and filter condenser, loading resistor.
The amplification filtering circuit is made of the computing amplification circuit.
Amplifying circuit is made of the computing amplification circuit.
Amplifier fiducial value initialization circuit can be connected the multiplying power resistor and form by the delivery outlet of single-chip microcomputer; Also can form, to obtain higher output accuracy by the delivery outlet connection D/A change-over circuit or the PWM voltage-regulating circuit of single-chip microcomputer.
The MCU interface circuit comprises the single machine output end that connects amplifier fiducial value initialization circuit, and amplification circuit output end.
Oscillating circuit is made of the square-wave generator circuit.Can constitute by the amplification output circuit of single-chip microcomputer, also can constitute by oscillating circuit independently as signal source.
The feature that integrated circuit constitutes is: the delivery outlet of single-chip microcomputer and connect the multiplying power resistor in the amplifier fiducial value initialization circuit, constitute voltage control loop with the control end of operational amplification circuit in the amplifying circuit, the output of amplifying circuit connects the formation close loop control circuit through isolation resistance with the delivery outlet of single-chip microcomputer in the amplifier fiducial value initialization circuit.
In the utility model when work,, oscillating circuit produces high accuracy frequency of oscillation waveform Xout, sends to the displacement transducer of outside, again by amplify rectification circuit to the AC signal Xin that feeds back amplify, rectification, to the direct current signal of converting; By the amplification filtering circuit,, obtain the output voltage signal Uout of amplifying circuit then through further comparing and enlarging again after the amplification filtering.This shows, when the output (being the input Xin of Weighing module) of displacement transducer along with washing machine in when the change of clothing weight and corresponding change, the amplitude of output voltage signal Uout end is respective change thereupon also.Afterwards the analog voltage Uout that is surveyed is sent outside MCU to handle.
This device is connected with outside MCU microprocessor by the MCU interface circuit and carries out the interactive process data, thereby realizes the startup of the work of weighing.The MCU interface circuit receives the Start signal from outside MCU input---low level time greater than the 10mS negative pulse after, adjust the amplification fiducial value of amplifying circuit by amplifier fiducial value initialization circuit, make output signal U out reach suitable amplitude, send out high level by the MCU interface circuit then and give outside MCU---weigh to start and finish.After this, outside MCU can converse clothing weight in the washing machine according to the variation of the output voltage U out of amplifying circuit.The judgement of the signal here, response mode and time are set, and wait and can carry out corresponding change according to the need of work of outside MCU.
In sum, a kind of laundry of washing machine detection control apparatus of weighing automatically, by the amplification rectification circuit that links with the displacement transducer output, with amplify the amplification filtering circuit that rectification circuit links, the amplifying circuit that links with the amplification filtering circuit, the amplifier fiducial value initialization circuit that links with amplifying circuit, the MCU interface circuit that links with amplifier fiducial value initialization circuit, and oscillating circuit constitutes, it is characterized in that: the delivery outlet of single-chip microcomputer and connect the multiplying power resistor in the amplifier fiducial value initialization circuit, constitute voltage control loop with the control end of operational amplification circuit in the amplifying circuit, the output of amplifying circuit connects the formation close loop control circuit through isolation resistance with the delivery outlet of single-chip microcomputer in the amplifier fiducial value initialization circuit.
The utility model provides a kind of and has cooperated with displacement transducer, and displacement transducer signal is converted into the d. c. voltage signal of easy measurement identification, thus the circuit of weighing, have simple in structure, with low cost, the characteristics that certainty of measurement is more high.This circuit can be widely used in the various occasions of weighing, especially applicable in the roller washing machine.
Below in conjunction with Figure of description the utility model is done further to disclose.
Description of drawings
Fig. 1 is a functional-block diagram of the present utility model,
Fig. 2 is a schematic diagram of the present utility model.
Among the figure: 1-amplifies rectification circuit, 2-amplification filtering circuit, 3-amplifying circuit, 4-oscillating circuit, 5-amplifier fiducial value initialization circuit, 6-MCU interface circuit, 7-displacement transducer.
Fig. 3 is the interface sequence schematic diagram of MCU.
The specific embodiment
Embodiment:
A kind of laundry of washing machine detection control apparatus of weighing automatically, by the amplification rectification circuit 1 that links with displacement transducer 7 outputs, with amplify the amplification filtering circuit 2 that rectification circuit 1 links, the amplifying circuit 3 that links with amplification filtering circuit 2, the amplifier fiducial value initialization circuit 5 and the MCU interface circuit 6 that link with amplifying circuit 3, and oscillating circuit 4 constitutes, it is characterized in that: the delivery outlet of single-chip microcomputer IC1 and connect multiplying power resistor R 3-R8 in the amplifier fiducial value initialization circuit 5, constitute voltage control loop with the control end of operational amplification circuit IC3B in the amplifying circuit 3, the output of amplifying circuit 3 connects the formation close loop control circuit through isolation resistance R27 with delivery outlet 12 pin of single-chip microcomputer IC1 in the amplifier fiducial value initialization circuit 5.
Amplifying rectification circuit 1 is connected successively by amplifying circuit and rectification circuit and constitute: amplifying circuit is made up of computing amplification circuit IC3A, and computing amplification circuit IC3A is made up of two computing amplification circuit LM358DT of low-power consumption; Rectification circuit is made of crystal rectifier and filter condenser, loading resistor, and crystal diode D1 forms half-wave rectifier, and filter condenser C13, loading resistor R18 compose in parallel wave filter.
Amplifying circuit 3 is made of computing amplification circuit IC2B, IC3B, is made up of two computing amplification circuit LM358DT of low-power consumption.
Amplifier fiducial value initialization circuit 5 is made up of the delivery outlet connection multiplying power resistor R 3-R8 of single-chip microcomputer; Also can connect the D/A change-over circuit by the delivery outlet of single-chip microcomputer and form, to obtain higher output accuracy.
The MCU interface circuit comprises single machine output end 1,13 pin that connect amplifier fiducial value initialization circuit 5, and output 7 pin of the output computing amplification circuit IC2B of amplifying circuit 3.
Oscillating circuit 4 is made of the square-wave generator circuit.Can constitute by the amplification output circuit of single-chip microcomputer, also can constitute by oscillating circuit independently as signal source.
The utility model produces high accuracy frequency of oscillation waveform Xout by oscillating circuit 4, sends to the displacement transducer 7 of outside, and the AC signal Xin that 1 pair of rectification circuit feeds back amplifies, rectification by amplifying again, to the direct current signal of converting; By amplification filtering circuit 2,, obtain the output voltage signal Uout of amplifying circuit 3 then through further comparing and enlarging again after the amplification filtering.This shows, when the output (being the input Xin of Weighing module) of displacement transducer along with washing machine in when the change of clothing weight and corresponding change, the amplitude of output voltage signal Uout end is respective change thereupon also.Afterwards the analog voltage Uout that is surveyed is sent outside MCU to handle.Can be as required the multiplication factor adjustment of each amplifying circuit be obtained corresponding weighing precision, also can simplify processing to each funtion part as required.
Weighing module is connected with outside MCU microprocessor by MCU interface circuit 6 and carries out the interactive process data, thereby realizes the startup of Weighing module work.MCU interface circuit 6 receives the Start signal from outside MCU input---low level time greater than the 10mS negative pulse after, adjust the amplification fiducial value of amplifying circuit 3 by amplifier fiducial value initialization circuit 5, make output signal U out reach suitable amplitude, give outside MCU by 6 high level of MCU interface circuit then---weigh to start and finish.After this, outside MCU can converse clothing weight in the washing machine according to the variation of the output voltage U out of amplifying circuit 3.The judgement of the signal here, response mode and time are set, and wait and can carry out corresponding change according to the need of work of outside MCU.
Be connected with outside MCU microprocessor by MCU interface circuit 6 and carry out the interactive process data, thereby realize the startup of the work of weighing.MCU interface circuit 6 receives the Start signal from outside MCU input---low level time greater than the 10mS negative pulse after, adjust the amplification fiducial value of amplifying circuit 3 by amplifier fiducial value initialization circuit 5, to Weighing module output carrying out initialization, make output signal U out reach suitable amplitude, output is delivered to 12 pins of single-chip microcomputer IC1 by the 7th pin sampling of amplifier IC2, judge by single-chip microcomputer whether its voltage is suitable value, if not, then adjust the output of single-chip microcomputer 6-11 pin, change the size that it outputs to the voltage value of IC3 the 5th pin, and then the size of the comparative voltage of change amplifier IC2 the 5th pin, thereby adjust the output voltage of amplifier IC2, after this value was adjusted to suitable value, single-chip microcomputer stopped to adjust.Give outside MCU by 6 high level of MCU interface circuit then---weigh to start and finish.After this, outside MCU can converse clothing weight in the washing machine according to the variation of the output voltage U out of amplifying circuit 3.The judgement of the signal here, response mode and time are set, and wait and can carry out corresponding change according to the need of work of outside MCU.
Xout is the square-wave signal (output of 0-5V square wave) that outputs to displacement transducer, Xin is the input signal (5V-+5V square-wave signal) that displacement transducer feeds back to Weighing module, Uout is weighing measurement signal output (1.5V-4.5V, 1000 ohm of output impedance), VCC is power supply (4.75-5.25V), GND is a ground connection, and START measures enabling signal (0-5V, internal pull-up resistor), handshake for the I/O check weighing.Above signal can be adjusted to suitable amplitude as required.
Claims (9)
1. laundry of washing machine detection control apparatus of weighing automatically, by the amplification rectification circuit (1) that links with displacement transducer (7) output, with amplify the amplification filtering circuit (2) that rectification circuit (1) links, the amplifying circuit (3) that links with amplification filtering circuit (2), the amplifier fiducial value initialization circuit (5) and the MCU interface circuit (6) that link with amplifying circuit (3), and oscillating circuit (4) constitutes, it is characterized in that: the delivery outlet of the middle single-chip microcomputer IC1 of amplifier fiducial value initialization circuit (5) also connects multiplying power resistor R 3-R8, constitute voltage control loop with the control end of operational amplification circuit IC3B in the amplifying circuit (3), the output of amplifying circuit (3) connects the formation close loop control circuit through isolation resistance R27 with delivery outlet 12 pin of single-chip microcomputer IC1 in the amplifier fiducial value initialization circuit (5).
2. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically, it is characterized in that amplifying rectification circuit (1) is connected successively by amplifying circuit and rectification circuit and constitute: amplifying circuit is made up of computing amplification circuit IC3A, and computing amplification circuit IC3A is made up of two computing amplification circuit LM358DT of low-power consumption; Rectification circuit is made of crystal rectifier and filter condenser, loading resistor, and crystal diode D1 forms half-wave rectifier, and filter condenser C13, loading resistor R18 compose in parallel wave filter.
3. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically, it is characterized in that amplification filtering circuit (2) is made of computing amplification circuit IC2A, computing amplification circuit IC2A is made up of two computing amplification circuit LM358DT of low-power consumption.
4. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically is characterized in that amplifying circuit (3) is made of computing amplification circuit IC2B, IC3B, is made up of two computing amplification circuit LM358DT of low-power consumption.
5. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically is characterized in that amplifier fiducial value initialization circuit (5) connects multiplying power resistor R 3 one R8 by the delivery outlet of single-chip microcomputer and forms; Also can be connected the D/A change-over circuit by the delivery outlet of single-chip microcomputer forms.
6. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically, it is characterized in that the MCU interface circuit comprises single machine output end 1,13 pin that connect amplifier fiducial value initialization circuit (5), and output 7 pin of the output computing amplification circuit IC2B of amplifying circuit (3).
7. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically is characterized in that oscillating circuit (4) is made of the square-wave generator circuit.
8. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically is characterized in that oscillating circuit (4) is made of the square-wave generator circuit, is made up of as the amplification output circuit of signal source single-chip microcomputer.
9. the laundry of washing machine according to claim 1 detection control apparatus of weighing automatically is characterized in that oscillating circuit (4) is made of the square-wave generator circuit, is made up of oscillating circuit independently.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201039042U CN201045173Y (en) | 2007-03-22 | 2007-03-22 | Laundry machine clothings automatic weight testing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201039042U CN201045173Y (en) | 2007-03-22 | 2007-03-22 | Laundry machine clothings automatic weight testing control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201045173Y true CN201045173Y (en) | 2008-04-09 |
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ID=39308648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201039042U Expired - Lifetime CN201045173Y (en) | 2007-03-22 | 2007-03-22 | Laundry machine clothings automatic weight testing control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201045173Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA021502B1 (en) * | 2009-06-17 | 2015-07-30 | Грандимпьянти Иле Али С.П.А. | Method for weighing laundry inside a basket-type washing machine |
-
2007
- 2007-03-22 CN CNU2007201039042U patent/CN201045173Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EA021502B1 (en) * | 2009-06-17 | 2015-07-30 | Грандимпьянти Иле Али С.П.А. | Method for weighing laundry inside a basket-type washing machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080409 |