CN201148547Y - Laundry machine cloth quantity testing circuit - Google Patents
Laundry machine cloth quantity testing circuit Download PDFInfo
- Publication number
- CN201148547Y CN201148547Y CNU2007201967614U CN200720196761U CN201148547Y CN 201148547 Y CN201148547 Y CN 201148547Y CN U2007201967614 U CNU2007201967614 U CN U2007201967614U CN 200720196761 U CN200720196761 U CN 200720196761U CN 201148547 Y CN201148547 Y CN 201148547Y
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- negative pole
- positive terminal
- washing machine
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Abstract
The utility model discloses a washing machine fabric-quantity detection circuit which comprises a signal detection port which is connected with a motor and a signal processing port which is connected with a microprocessor. The detection circuit also comprises a half-wave rectifying circuit, a photocoupler and a transistor amplifying circuit, wherein, motor fabric-quantity detection current detected by the signal detection port is rectified by the half-wave rectifying circuit to form half-wave signal current which is coupled into square wave signal current by the photocoupler, and the square wave signal current is amplified by the transistor amplifying circuit and is sent to the microprocessor through the signal processing port. The detection circuit has simple structure and is used for replacing the prior sensor with high cost such as a weight sensor etc., thereby reducing the cost of a washing machine fabric-quantity detection element.
Description
Technical field
The utility model relates to a kind of washing machine testing circuit, particularly relates to a kind of testing circuit that is used to detect washing machine cloth amount.
Background technology
The fuzzy function of washing machine is meant on the basis of conventional laundry apparatus, and the controller by washing machine is to the weight of clothes, the cloth matter of clothes, and degree of fouling is judged and is selected the function of program for washing automatically.Fuzzy function is to be applied in function more advanced on the washing machine at present, on the impeller-type of family expenses, drum-type, agitator type washing machine application is arranged all.
The fuzzy data of washing machine generally has the detection at cloth amount (being the weight of clothes) data.
Concerning washing machine, if controller can accurately detect the weight of clothes, the used water yield in the time of just can selecting washing machine according to the cloth amount, and select the suitable laundry time.Really reach the purpose of intelligent control, just the fuzzy control of often saying on the washing machine controller.
Prior art such as China Patent No. are 02114880.5, name is called the patent of " utilizing weight sensor to detect the method for determining cloth amount, the water yield in the washing machine ".This patent disclosure a kind ofly detect the structure of the weight data of cloth in the wash bucket and/or water by gravity sensor is installed at washing machine bottom.And gravity sensor itself is comparatively expensive, has increased the cost of washing machine controller.
The utility model content
Technical problem to be solved in the utility model is: a kind of washing machine cloth amount testing circuit is provided, and this testing circuit is simple in structure, is used to replace expensive sensors such as existing weight sensor, thereby reduces the cost of washing machine cloth amount detecting element.
For solving the problems of the technologies described above, the utility model adopts following technical scheme: a kind of washing machine cloth amount testing circuit comprises signal detection port that connects motor and the signal processing port that is connected microprocessor; Described testing circuit also comprises half-wave rectifying circuit, photoelectrical coupler, transistor amplifier circuit; Wherein, the detected motor cloth of described signal detection port amount signal code forms the half-wave voltage signal electric current after the half-wave rectifying circuit rectification, the half-wave voltage signal electric current is coupled into the square-wave signal electric current via photoelectrical coupler again, and the square-wave signal electric current is given described microprocessor by the oral instructions of described signal end for process after transistor amplifier circuit amplifies.
Preferably:
Described signal detection port comprises two motor splicing ears;
Described half-wave rectifying circuit comprises two diodes and a current-limiting resistance;
Described photo-coupler comprises light emitting source positive terminal, light emitting source negative pole end, is subjected to the light source positive terminal and is subjected to the light source negative pole end;
Wherein, first motor splicing ear of signal detection port connects the negative pole end of described light emitting source positive terminal and second diode;
The negative pole end of first diode connects second motor splicing ear, and connects with described current-limiting resistance, and the positive terminal of first diode and second diode cathode end are also received described light emitting source negative pole end.
Preferably: described transistor amplifier circuit comprises+5V power supply, triode and shunt resistance;
The described light source positive terminal that is subjected to connects+5 power supplys;
Described common base and the described shunt resistance that is subjected to the light source negative pole end to connect triode, shunt resistance ground connection constitutes the loop;
The colelctor electrode of described triode connect described signal handle port and+the 5v power supply, the grounded emitter of triode constitutes the loop.
The beneficial effects of the utility model are:
Compared to existing technology, the utility model is simple in structure, and used electrical equipment is with low cost, can substitute comparatively expensive electronic components such as weight sensor fully.
Below in conjunction with accompanying drawing the utility model is described in further detail.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Fig. 2 is a motor inverse electromotive force signal graph.
Fig. 3 is the square-wave signal figure that can be discerned by microprocessor after treatment.
The specific embodiment
The utility model provides a kind of washing machine cloth amount testing circuit.This testing circuit comprises signal detection port that connects motor and the signal processing port that is connected microprocessor.Testing circuit also comprises half-wave rectifying circuit, photoelectrical coupler, transistor amplifier circuit.Wherein, the detected motor cloth of signal detection port amount signal code forms the half-wave voltage signal electric current after the half-wave rectifying circuit rectification, the half-wave voltage signal electric current is coupled into the square-wave signal electric current via photoelectrical coupler again, and the square-wave signal electric current is given microprocessor by the oral instructions of signal end for process after amplify on transistor discharge road.
Schematic diagram of the present utility model is referring to Fig. 1.
This testing circuit comprises signal detection port that connects motor and the signal processing port IO1 that is connected microprocessor MCU.
The signal detection port comprises two motor splicing ears, i.e. first motor splicing ear A and second motor splicing ear B.Half-wave rectifying circuit comprises two diodes, i.e. first diode D1 and second diode D2 and a current-limiting resistance R1.
Photo-coupler IC1 comprises light emitting source positive terminal 1, light emitting source negative pole end 2, is subjected to light source positive terminal 4 and is subjected to light source negative pole end 3.
Wherein, first motor splicing ear A connects the negative pole end of light emitting source positive terminal 1 and second diode D2.
The negative pole end of first diode D1 connects second motor splicing ear B, and connects with current-limiting resistance R1, and the positive terminal of first diode D1 and the positive terminal of second diode D2 are also received light emitting source negative pole end 2.
Transistor amplifier circuit comprises+5V power supply, triode TR1, shunt resistance R3, second resistance R 2 and the 4th resistance R 4.
Be subjected to light source positive terminal 4 to connect+5 power supplys.
Be subjected to light source negative pole end 3 to connect second resistance R, 2 backs and meet common base and the shunt resistance R3 of triode TR1, shunt resistance R3 ground connection constitutes the loop.
The colelctor electrode of triode TR1 connect signal handle port IO1 and+the 5v power supply, the grounded emitter of triode TR1 constitutes the loop.
Referring to Fig. 1, the waveform of Fig. 2 is by first diode D1 and second diode D2 rectification, and the coupling of photo-coupler IC1 signal is amplified shaping by triode TR1 again and become the discernible square-wave signal of microprocessor MCU.
The effect of current-limiting resistance R1 is the restriction electric current, because first motor splicing ear A and second motor splicing ear B connect is the rotating winding of motor, can produce very big electric current, and first diode D1 and second diode D2 play rectification.Photo-coupler IC1 is that optocoupler plays the effect of isolating forceful electric power and coupled signal, and triode TR1 role is that signal is amplified, and is shaped to square-wave signal.
Operation principle.
As shown in Figure 1, first motor splicing ear A and second motor splicing ear B connect the rotating winding of washing machine respectively.Behind the motor starting of washing machine, stop motor this moment again, because the inertia of motor, motor can not stop at once, can rotate again and stop for a moment again.And the rotation of this motor can produce inverse electromotive force, and causes can detecting from first motor splicing ear A and second motor splicing ear B the waveform of similar Fig. 2.
The waveform of Fig. 2 becomes the square-wave signal that microprocessor MCU can discern by circuit rectification, the amplification of Fig. 1, and this square-wave signal as shown in Figure 3.
When clothes was fewer in the washing machine, time that motor stops can be slow, understands some more as the quantity of the waveform of the square wave of Fig. 3.Pledging clothes the time that motor stops many time can be hurry up, waveform as shown in Figure 3 can be less, by the interior calculating that is formed on the software among the microprocessor MCU, the situation according to the concrete bucket of washing machine just can draw the cloth amount again according to what of the square-wave waveform of detecting.
Claims (3)
1, a kind of washing machine cloth amount testing circuit comprises signal detection port that connects motor and the signal processing port that is connected microprocessor; It is characterized in that:
Described testing circuit also comprises half-wave rectifying circuit, photoelectrical coupler, transistor amplifier circuit; Wherein, the detected motor cloth of described signal detection port amount signal code forms the half-wave voltage signal electric current after the half-wave rectifying circuit rectification, the half-wave voltage signal electric current is coupled into the square-wave signal electric current via photoelectrical coupler again, and the square-wave signal electric current is given described microprocessor by the oral instructions of described signal end for process after transistor amplifier circuit amplifies.
2, washing machine cloth amount testing circuit according to claim 1 is characterized in that:
Described signal detection port comprises two motor splicing ears;
Described half-wave rectifying circuit comprises two diodes and a current-limiting resistance (R1);
Described photo-coupler (IC1) comprises light emitting source positive terminal (1), light emitting source negative pole end (2), is subjected to light source positive terminal (4) and is subjected to light source negative pole end (3);
Wherein, first motor splicing ear (A) of signal detection port connects the negative pole end of described light emitting source positive terminal (1) and second diode (D2);
The negative pole end of first diode (D1) connects second motor splicing ear (B), and connects with described current-limiting resistance (R1), and the positive terminal of first diode (D1) and second diode (D2) positive terminal are also received described light emitting source negative pole end (2).
3, washing machine cloth amount testing circuit according to claim 2 is characterized in that: described transistor amplifier circuit comprises+and 5V power supply, triode (TR1) and shunt resistance (R3);
The described light source positive terminal (4) that is subjected to connects+5 power supplys;
Described common base and the described shunt resistance (R3) that is subjected to light source negative pole end (3) to connect triode (TR1), shunt resistance (R3) ground connection constitutes the loop;
The colelctor electrode of described triode (TR1) connect described signal handle port (IO1) and+the 5v power supply, the grounded emitter formation loop of triode (TR1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201967614U CN201148547Y (en) | 2007-12-29 | 2007-12-29 | Laundry machine cloth quantity testing circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201967614U CN201148547Y (en) | 2007-12-29 | 2007-12-29 | Laundry machine cloth quantity testing circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201148547Y true CN201148547Y (en) | 2008-11-12 |
Family
ID=40116313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201967614U Expired - Fee Related CN201148547Y (en) | 2007-12-29 | 2007-12-29 | Laundry machine cloth quantity testing circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201148547Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102063076A (en) * | 2010-10-31 | 2011-05-18 | 合肥荣事达洗衣设备制造有限公司 | Full-automatic washing machine high precision fuzzy control circuit and method thereof |
| CN102239291B (en) * | 2008-12-03 | 2013-01-23 | Bsh博世和西门子家用电器有限公司 | Domestic appliance comprising a measuring unit and method for transmitting a measurement variable |
| CN114264360A (en) * | 2021-12-07 | 2022-04-01 | 深圳市博悠半导体科技有限公司 | Object identification method and device based on radar and intelligent electronic scale |
-
2007
- 2007-12-29 CN CNU2007201967614U patent/CN201148547Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102239291B (en) * | 2008-12-03 | 2013-01-23 | Bsh博世和西门子家用电器有限公司 | Domestic appliance comprising a measuring unit and method for transmitting a measurement variable |
| CN102063076A (en) * | 2010-10-31 | 2011-05-18 | 合肥荣事达洗衣设备制造有限公司 | Full-automatic washing machine high precision fuzzy control circuit and method thereof |
| CN102063076B (en) * | 2010-10-31 | 2012-12-12 | 合肥荣事达洗衣设备制造有限公司 | Full-automatic washing machine high precision fuzzy control circuit and method thereof |
| CN114264360A (en) * | 2021-12-07 | 2022-04-01 | 深圳市博悠半导体科技有限公司 | Object identification method and device based on radar and intelligent electronic scale |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081112 Termination date: 20161229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |