CN108589177A - A kind of washing machine imbalance detection system based on angle measurement - Google Patents
A kind of washing machine imbalance detection system based on angle measurement Download PDFInfo
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- CN108589177A CN108589177A CN201810232620.6A CN201810232620A CN108589177A CN 108589177 A CN108589177 A CN 108589177A CN 201810232620 A CN201810232620 A CN 201810232620A CN 108589177 A CN108589177 A CN 108589177A
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- washing machine
- angle
- arch bar
- detection system
- angle measurement
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- D06F37/203—
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Abstract
The invention discloses a kind of washing machine imbalance detection system based on angle measurement, including：Sensor module is arranged in washing machine internal or outside, for when washing machine angle changes, exporting different voltage values to electronic circuit board；Upper arch bar, bottom arch bar, the electronic circuit board that the sensor module specifically includes shell and is arranged in the shell, the wherein described bottom arch bar is equipped with four pieces of capacitor boards, interlayer is equipped between the upper arch bar and the bottom arch bar, it is provided with insulating liquid in the interlayer, moveable bubble is formed in the insulating liquid, the change in location of the bubble makes the capacitance of tri- axis of X, Y, Z of capacitor board that linear change occur；The electronic circuit board is encapsulated in the sensor module, for being calculated according to the variation of capacitance, exports inclination angle measured value, and when the integral inclined angle of washing machine is more than predetermined angle, the automatic order for starting reduction of speed prevents washing machine from toppling over.
Description
Technical field
The present invention relates to washing machine technology fields, particularly relate to a kind of washing machine imbalance inspection based on angle measurement
Examining system.
Background technology
In use, the problem that needing most prevents is exactly washing machine in high speed washing or dehydration to washing machine
It is middle to topple over.Especially during laundry machine dehydration, may due in bucket load distribution it is uneven cause systematic eccentricity compared with
Greatly, to cause system centrifugal force larger, the situations such as generation outer barrel is hit babinet or complete machine displacement or even toppled over.
Occur compared with large eccentricity when to avoid dehydration, traditional method, which is washing machine controller, to be needed to pass through before high speed dewatering
Weigh to bucket undergarment, then by being run to washing machine when speed and electric current detection with preset normal value carry out
Comparison, to judge whether washing machine is in non-equilibrium state, this method can be the side of nearest 20 years mainstreams currently on the market
Case, but due to being a kind of method judged indirectly by electric signal, so not being accurately very high, occasional, which goes out, first judges by accident,
And since error rate is higher, about 15% error rate, so actual market product usually normality threshold is set it is relatively low, with
Reliability is improved, therefore limits the maximum washability of washing machine.
Therefore, there is an urgent need for a kind of new technologies of design to improve its problem by the present inventor.
Invention content
The present invention is intended to provide a kind of washing machine imbalance detection system based on angle measurement, uses a kind of angle to pass
Sensor is used to detect the non-equilibrium state of washing machine, when washing machine occur it is uneven or have topple over trend when, timely reduction of speed or stop
Only run.
In order to solve the above technical problems, the technical scheme is that：
A kind of washing machine imbalance detection system based on angle measurement, including：
Sensor module, setting is in washing machine internal or outside, for when washing machine angle changes, output to be not
With voltage value to electronic circuit board；The sensor module specifically include shell and be arranged in the shell upper arch bar,
Bottom arch bar, electronic circuit board are set wherein the bottom arch bar is equipped with four pieces of capacitor boards between the upper arch bar and the bottom arch bar
There is interlayer, insulating liquid is provided in the interlayer, form moveable bubble in the insulating liquid, the position of the bubble becomes
Linear change occurs for the capacitance for changing tri- axis of X, Y, Z for making capacitor board；
The electronic circuit board is encapsulated in the sensor module, defeated for being calculated according to the variation of capacitance
Go out inclination angle measured value, and when the integral inclined angle of washing machine is more than predetermined angle, the automatic order for starting reduction of speed prevents from doing washing
Machine is toppled over.
Preferably, the electronic circuit board specifically includes：
Measuring circuit, for being detected to capacitance variation；
Microprocessor is connect with the measuring circuit, is calculated for the angle of inclination to washing machine；
Analog output circuit is connect with the microprocessor, for corresponding by the angles of inclination analog output X, Y, Z
Voltage；
PWM output circuits are connect with the microprocessor, for the angle of inclination by the output of PWM count word amount X, Y, Z
Digital quantity；
Memory is connect with the microprocessor, for being stored.
Preferably, the bottom arch bar is polyester plastics arch sheet.
Preferably, the upper arch bar is aluminum arch.
Preferably, the shell is plastic shell.
Preferably, the thickness of the interlayer is 3mm.
Preferably, the predetermined angle is 10 degree.
Using above-mentioned technical proposal, the present invention includes at least following advantageous effect：
Washing machine imbalance detection system of the present invention based on angle measurement uses a kind of angular transducer to use
In the non-equilibrium state of detection washing machine, when washing machine occur it is uneven or have topple over trend when, timely reduction of speed or out of service.
Scheme cost is relatively low, is suitble to household appliances.And this method can be measured with conventional telecommunications number and be corrected each other, be equivalent in original
A kind of measurement correction of safety and reliability is increased on the basis of having.
Description of the drawings
Fig. 1 is the structural schematic diagram of sensor module of the present invention；
Fig. 2 is the schematic diagram of the washing machine imbalance detection system of the present invention based on angle measurement；
Fig. 3 is the flow chart of the washing machine imbalance detection system of the present invention based on angle measurement.
Wherein：1. shell, 2. interlayers, arch bar on 3., 4. bottom arch bars, 5. electronic circuit boards.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1 to Figure 2, to meet a kind of washing machine imbalance detection system based on angle measurement of the present invention,
Including：
Sensor module, setting is in washing machine internal or outside, for when washing machine angle changes, output to be not
With voltage value to electronic circuit board 5；The arch that the sensor module specifically includes shell 1 and is arranged in the shell 1
Plate 3, bottom arch bar 4, electronic circuit board 5, wherein the bottom arch bar 4 is equipped with four pieces of capacitor boards, the upper arch bar 3 and the lower arch
It is equipped with interlayer 2 between plate 4, insulating liquid is provided in the interlayer 2, forms moveable bubble in the insulating liquid, it is described
The change in location of bubble makes the capacitance of tri- axis of X, Y, Z of capacitor board that linear change occur；
The electronic circuit board 5 is encapsulated in the sensor module, defeated for being calculated according to the variation of capacitance
Go out inclination angle measured value, and when the integral inclined angle of washing machine is more than predetermined angle, the automatic order for starting reduction of speed prevents from doing washing
Machine is toppled over.
Preferably, the electronic circuit board 5 specifically includes：
Measuring circuit, for being detected to capacitance variation；
Microprocessor is connect with the measuring circuit, is calculated for the angle of inclination to washing machine；
Analog output circuit is connect with the microprocessor, for corresponding by the angles of inclination analog output X, Y, Z
Voltage；
PWM output circuits are connect with the microprocessor, for the angle of inclination by the output of PWM count word amount X, Y, Z
Digital quantity；
Memory is connect with the microprocessor, for being stored.
Preferably, the bottom arch bar 4 is polyester plastics arch sheet.
Preferably, the upper arch bar 3 is aluminum arch.
Preferably, the shell 1 is plastic shell 1.
Preferably, the thickness of the interlayer 2 is 3mm.
Preferably, the predetermined angle is 10 degree.
Specifically：
Current embodiment require that a kind of Sensitive Apparatus based on capacitance principle and without movable member.Its structure is as shown in Figure 1, pass
Sensor component is made of two arcuation plates at a distance of only 3mm sealing weldings, there is 4 blocks of capacitances on the polyester plastics arch sheet of lower layer
Plate, the aluminum arch on upper layer have the liquid of high dielectric constant, and formed and account for about 1/4 space as a common end in interlayer 2
Bubble is located at centre.When inclined, bubble moves on to the other side from side, and linear change occurs for capacitance, then passes through electronic circuit
Plate 5 is converted into angle value output (simulation output and the output of PWM count word).There are four aperture is adjusted on sensor outer housing 1, divide
Do not correspond to X, Y, Z axis zeroing (at 0 ° output voltage=1/2 supply voltage) and calibration (inclination angle often changes 1 °, and output voltage becomes
How many 5mV changed).Sensor module and electronic circuit board 5 are encapsulated in firm plastic shell 1, to ensure its safety.Its is small
Skilful external form and robust structure are very suitable for installation space finite sum environmental condition and require harsh occasion.
X, the direction of tri- axis of Y, Z causes the capacitance of X, Y, Z capacitance to change by the position of steam bubble respectively, and capacitance variation is logical
It crosses measuring circuit to be detected, and is calculated and stored into microprocessor, and eventually by the inclination angles analog output X, Y, Z
The inclination angle digital quantity of corresponding voltage and the output of PWM count word amount X, Y, Z.
Due to that the variation of the position of bubble can be eventually converted into the variation of voltage, then voltage by sensor side
It is to angular transition mode：
The analog quantity of output is converted to the equation of angle is：
Wherein：Offset is the voltage value (voltage 2.5v) exported at 0 °
Sensitivity is chip sensitivity (SCA100T-D01 is 4v/g, and SCA100T-D02 is 2v/g)
Vout is the analog quantity of chip output
When angle is close to 0 °, it can be used to lower reduced equation and calculate, the accuracy of result of calculation can pass through following table
Solution.
Simplify transfer equation：
Wherein：Sensitivity=70mV/ ° (SCA100T-D01) or Sensitivity=35mV/ ° of (SCA100T-
D02)
It is as shown in the table using the error simplified between formula result of calculation and actual angle of inclination：
In the mode that microprocessor internal is calculated referring to Fig. 3, inclination angle is finally calculated, when the integral inclined angle of washing machine
When more than 10 degree, the automatic order for starting reduction of speed prevents washing machine from toppling over.
When reaching tilt state when in the present embodiment because of washing machine imbalance, angle of inclination is most intuitive directly reference
Value, it is the most intuitive and accurate to final goal measured value.By the way of a kind of influence capacitor's capacity variation based on angle change,
Finally cause the scheme cost of voltage change relatively low, is suitble to household appliances.And this method can be measured with conventional telecommunications number
It corrects each other, is equivalent to and increases a kind of measurement correction of safety and reliability on the original basis.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (7)
1. a kind of washing machine imbalance detection system based on angle measurement, which is characterized in that including：
Sensor module is arranged in washing machine internal or outside, for when washing machine angle changes, exporting different
Voltage value is to electronic circuit board；The sensor module specifically include shell and be arranged in the shell upper arch bar, lower arch
Plate, electronic circuit board are equipped with folder wherein the bottom arch bar is equipped with four pieces of capacitor boards between the upper arch bar and the bottom arch bar
Layer, it is provided with insulating liquid in the interlayer, forms moveable bubble in the insulating liquid, the change in location of the bubble makes
Linear change occurs for the capacitance of tri- axis of X, Y, Z of capacitor board；
The electronic circuit board is encapsulated in the sensor module, and for being calculated according to the variation of capacitance, output is inclined
Angle measurement, and when the integral inclined angle of washing machine is more than predetermined angle, the automatic order for starting reduction of speed prevents washing machine from inclining
.
2. the washing machine imbalance detection system based on angle measurement as described in claim 1, it is characterised in that：The electronics
Wiring board specifically includes：
Measuring circuit, for being detected to capacitance variation；
Microprocessor is connect with the measuring circuit, is calculated for the angle of inclination to washing machine；
Analog output circuit is connect with the microprocessor, for passing through the corresponding electricity in the angles of inclination analog output X, Y, Z
Pressure；
PWM output circuits are connect with the microprocessor, the number at the angle of inclination for exporting X, Y, Z by PWM count word amount
Amount；
Memory is connect with the microprocessor, for being stored.
3. the washing machine imbalance detection system based on angle measurement as claimed in claim 1 or 2, it is characterised in that：It is described
Bottom arch bar is polyester plastics arch sheet.
4. the washing machine imbalance detection system as described in any one of claims 1-3 based on angle measurement, it is characterised in that：Institute
It is aluminum arch to state arch bar.
5. the washing machine imbalance detection system based on angle measurement as described in claim 1-4 is any, it is characterised in that：Institute
It is plastic shell to state shell.
6. the washing machine imbalance detection system according to any one of claims 1 to 5 based on angle measurement, it is characterised in that：Institute
The thickness for stating interlayer is 3mm.
7. the washing machine imbalance detection system based on angle measurement as described in claim 1-6 is any, it is characterised in that：Institute
It is 10 degree to state predetermined angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232620.6A CN108589177A (en) | 2018-03-20 | 2018-03-20 | A kind of washing machine imbalance detection system based on angle measurement |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232620.6A CN108589177A (en) | 2018-03-20 | 2018-03-20 | A kind of washing machine imbalance detection system based on angle measurement |
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| Publication Number | Publication Date |
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| CN108589177A true CN108589177A (en) | 2018-09-28 |
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| CN201810232620.6A Pending CN108589177A (en) | 2018-03-20 | 2018-03-20 | A kind of washing machine imbalance detection system based on angle measurement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359234A (en) * | 2019-08-13 | 2019-10-22 | 南京创维家用电器有限公司 | A kind of washing machine balancing coil assembly and its balance method with eccentricity detecting function |
| CN113026296A (en) * | 2019-12-09 | 2021-06-25 | 青岛海尔洗衣机有限公司 | Washing machine control method and washing machine |
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| CN2219485Y (en) * | 1994-05-25 | 1996-02-07 | 王晓钟 | Air bubble capacitor type levelness sensor |
| CN201232127Y (en) * | 2008-07-09 | 2009-05-06 | 南京乐金熊猫电器有限公司 | Washing machine with level meter |
| CN105180901A (en) * | 2015-10-07 | 2015-12-23 | 湖南科技学院 | Spherical capacitive plane level detection sensor |
| CN105274775A (en) * | 2014-06-16 | 2016-01-27 | 青岛海尔洗衣机有限公司 | Imbalance detection washing machine and imbalance detection method |
| CN107419479A (en) * | 2017-09-12 | 2017-12-01 | 南京创维家用电器有限公司 | A kind of washing machine and its unbalance detection method of vibration |
-
2018
- 2018-03-20 CN CN201810232620.6A patent/CN108589177A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219485Y (en) * | 1994-05-25 | 1996-02-07 | 王晓钟 | Air bubble capacitor type levelness sensor |
| CN201232127Y (en) * | 2008-07-09 | 2009-05-06 | 南京乐金熊猫电器有限公司 | Washing machine with level meter |
| CN105274775A (en) * | 2014-06-16 | 2016-01-27 | 青岛海尔洗衣机有限公司 | Imbalance detection washing machine and imbalance detection method |
| CN105180901A (en) * | 2015-10-07 | 2015-12-23 | 湖南科技学院 | Spherical capacitive plane level detection sensor |
| CN107419479A (en) * | 2017-09-12 | 2017-12-01 | 南京创维家用电器有限公司 | A kind of washing machine and its unbalance detection method of vibration |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110359234A (en) * | 2019-08-13 | 2019-10-22 | 南京创维家用电器有限公司 | A kind of washing machine balancing coil assembly and its balance method with eccentricity detecting function |
| CN110359234B (en) * | 2019-08-13 | 2023-08-18 | 创维电器股份有限公司 | Washing machine balance ring assembly with eccentric detection function and balance method thereof |
| CN113026296A (en) * | 2019-12-09 | 2021-06-25 | 青岛海尔洗衣机有限公司 | Washing machine control method and washing machine |
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Application publication date: 20180928 |