CN101016687B - HALL sensor applied for determining washing machine barrel bias - Google Patents
HALL sensor applied for determining washing machine barrel bias Download PDFInfo
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- CN101016687B CN101016687B CN200610002883A CN200610002883A CN101016687B CN 101016687 B CN101016687 B CN 101016687B CN 200610002883 A CN200610002883 A CN 200610002883A CN 200610002883 A CN200610002883 A CN 200610002883A CN 101016687 B CN101016687 B CN 101016687B
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Abstract
The invention relates to a new type HALL sensor used for judging the excursion of the washing barrel. The sensor comprises a always magnet 1, a circuitry board 2, a HALL element 3, and a case 4, wherein the element 3 is jointing fixed on the circuitry board 2 which is placed between the always magnet 1. The two ends of the two pole of the magnet 1 each have a tuber part in the shape of mosque. The invention is used in checking the position of the washing barrel. Compared with present checking elements, the sensor avoids bumping caused by without a judgment clear extreme point. The process of the identifying and the disposal is easy to control and can also used in other similar situation.
Description
Technical field
The present invention relates to a kind of displacement transducer, particularly a kind of novel HALL (Hall) sensor that is applied to washing machine drum biasing judgement belongs to field of sensing technologies.
Background technology
A vertical alive metal or the wafer placed will produce electromotive force between the both sides of thin slice in magnetic field, and this phenomenon is called Hall effect.Hall element is made on Hall effect principle basis.The Hall voltage that produces because of semi-conducting material is bigger, so the material of Hall element mainly contains: germanium, silicon, arsenicization are transferred, arsenicization is pluged with molten metal and antimonyization such as plugs with molten metal at semi-conducting material.
Though the Hall voltage that semi-conducting material produces is big than metal material, but also need be amplified during practical application, utilize integrated circuit technique that Hall element, amplifier, temperature compensator and mu balanced circuit etc. are integrated on the chip, just become the Hall element of function admirable, also claimed Hall integrated circuit.Press the function of output, Hall integrated circuit can be divided into two kinds of lienar for and switching modes.
The lienar for Hall integrated circuit is made up of voltage adjuster, Hall element, difference amplifier, output stage etc.Be characterized in: the linearity is good, low in energy consumption, highly sensitive, output resistance is little, contactless, life-span long and good temp characteristic.
The Hall switch integrated circuit is made up of voltage adjuster, Hall element, amplifying circuit, schmidt shaping circuit and output stage etc.Be characterized in low in energy consumption, highly sensitive, stable performance, contactless, the life-span is long.The Hall switch integrated circuit has the branch of one-way type and two-way type.
Hall element has characteristics such as size is little, in light weight, contactless, peripheral circuit is simple, frequency response is wide, dynamic characteristic is good, long service life, debugging convenience, can make various sensors with it, be used widely aspect displacement measurement, measurement of dip angle, pressure measxurement, survey rotating speed or revolution and the counting.
Hall (HALL) sensor is a kind of electronic component, and outline packages and triode are very alike.It is by the HALL element, and amplifier, Schmidt circuit and open collector output triode are formed.When magnetic field acts on the HALL element, produce a small HALL voltage, through amplifier amplify and Schmidt circuit after make triode conducting output low level, and when not having the magnetic field effect, triode ends and is output as high level.
In washing machine, especially adopt in the washing machine of frequency conversion mode drive motors, be good control laundry machine dehydration state, general mode with position switch, this mode is only hit at washing machine could obtain to hit a barrel signal when bucket reaches the limitation, thereby handle, and the injury that at this moment machine is caused takes place.
Adopt the mode of linear HALL in addition, with a linear HALL sensor, because the permanent magnet cross section is the taper (see figure 5) in this sensor, the magnetic field intensity that forms is linear change on the direction of motion of HALL sensing element, thereby the induced signal curve of output that forms as shown in Figure 1, can detect the situation of barrel deflection easily with this sensor, be applied to variable-frequency washing machine, can realize the purpose of speed dewatering state coordinated operation, but this sensor is used for conventional laundry apparatus and has shortcoming, because the clear and definite extreme point of neither one is used to judge whether to hit bucket, signal identification processing procedure complexity is not easy to control; Even in frequency changer, judge that hitting barrel extreme cases also seems not very convenient in addition.
Summary of the invention
The object of the present invention is to provide a kind of novel HALL (Hall) sensor that the washing machine drum biasing is judged that is applied to.
New HALL sensor of the present invention has carried out particular processing on internal structure, it has curve of output as shown in Figure 2, as seen from the figure, these curve two ends have limit judging point, when fluctuating limit point, can adjust driving immediately, avoid damage to mechanical part; Be the linear district of judging in the middle of this curve, can obtain bucket rotation drift condition continuously, be output as near linear output.
HALL sensor of the present invention is made of permanent magnet 1, wiring board 2, HALL sensing element 3, shell 4, wherein, HALL sensing element 3 is fixedly welded on the wiring board 2, and wiring board 2 is between permanent magnet 1, and two magnetic pole two ends of permanent magnet 1 have horseshoe-shaped jut respectively.
Among the present invention, magnet selects to consider the characteristic of HALL sensor, and strength, the magnetic field that magnet produces and the weakest point can not surpass HALL sensor scope, the material that magnet is selected for use is not limit, but generally select the light weight good stability, shock-resistant, the material of good temp characteristic.
The preferred NdFeB rare-earth permanent magnet of described permanent magnet;
The preferred sintered ndfeb permanent magnet body of above-mentioned permanent magnet, this kind permanent magnet have good anti-corrosion, high-coercive force and good magnetic homogenization.
The further preferred maximum magnetic energy product (BH of above-mentioned permanent magnet
Max) be not less than 350KJ/m
3Permanent magnet material.
The HALL sensor is selected the HALL sensor of linear output, and it is suitable not limit which kind of sensor, selects different sensors, must consider the characteristic of magnet, also will consider the HALL sensor characteristics when selecting magnet equally.
Shell is generally wanted the high plastics of selection intensity; PCB does not then have selectional restriction, but will consider electrical characteristic yet.
Above-mentioned sheathing material preferably adopts the ABS impact resistant plastics, should meet UL 94V-0 regulation.
Sensor of the present invention is used as the bucket position probing in washing machine, compare with position detection device of the prior art, it has avoided the tub-impact phenomenon of generation because the clear and definite extreme point of neither one judges identification, the signal identification processing procedure is simple, be easy to control, and can be applied to other similar occasion.
Description of drawings
Fig. 1 is the curve of output of linear HALL sensor
Fig. 2 is the curve of output of HALL sensor of the present invention
Fig. 3 is a HALL sensor of the present invention installation site schematic diagram
Fig. 4 is the position view of HALL sensor shown in Figure 3 after plastic casing is installed
Fig. 5 is the cross sectional shape of HALL sensor permanent magnet of the prior art
1---permanent magnet 2---wiring board
3---HALL sensing element 4---shell
The specific embodiment
See Fig. 3.
1 is permanent magnet, the permanent magnet of special construction produces the needed special magnetic field of position probing, the curve in this magnetic field as shown in Figure 2, the particularity of this magnet structure is the horse-hof shape jut at two ends, this jut can produce the magnetic field of a saltus step, the magnetic field of this saltus step acts on the HALL sensor, will produce output voltage curve shown in Figure 2. two magnets among Fig. 3 are installed on the plastic casing, and this plastic casing generally adopts the universal joint mode to be connected on the outer barrel of washing machine.
2 is wiring board, welded H ALL sensor, connect other parts, HALL sensor and joint weld are on this wiring board, the HALL sensor moves with this wiring board, this wiring board is installed on the framework of an activity, this framework and magnet shell are installed together, make the HALL sensor can form installation site as shown in Figure 3, this framework can slide in the magnet shell, this framework adopts the universal joint mode to be installed on the washing machine shell simultaneously, when laundry machine dehydration, and the deflection of outer bucket with the deflection of interior bucket, driving the magnet shell moves together, make the HALL sensor move in magnetic field, different magnetic field intensity place produces different voltage, thereby obtains voltage different output with the position difference.
3 is the HALL sensing element, and the HALL sensing element is the core component of position probing, is a device that output voltage changes with change of magnetic field strength, and after providing fixed power source voltage to sensing element, it just can export transformable voltage with changes of magnetic field.The welding of this sensor is moved and is moved with wiring board in the circuit board.
Above-mentioned parts are installed in the shell as shown in Figure 4.What fine rule partly drew among the figure is exactly plastic casing.
Because two magnetic pole two ends of the permanent magnet 1 of HALL sensor of the present invention have horseshoe-shaped jut respectively, the magnetic field distribution of permanent magnet 1 also as shown in Figure 2, when the HALL sensor moves to the end positions of two magnetic poles in magnetic field, also will produce voltage extremity point as shown in Figure 2, thereby help the eccentricities that the computer plate is judged the identification outer barrel of washing machine, further the control rotating speed avoids taking place tub-impact phenomenon.
Claims (6)
1. HALL sensor, the judgement that is used for the washing machine drum biasing detects, described sensor is made of permanent magnet (1), wiring board (2), HALL sensing element (3), shell (4), HALL sensing element (3) is fixedly welded on the wiring board (2), wiring board (2) is positioned between the permanent magnet (1), it is characterized in that two magnetic pole two ends of permanent magnet (1) have horseshoe-shaped jut respectively.
2. HALL sensor according to claim 1 is characterized in that, described HALL sensing element (3) is the HALL sensing element of linear output.
3. HALL sensor according to claim 1 is characterized in that, described permanent magnet (1) is the NdFeB rare-earth permanent magnet.
4. HALL sensor according to claim 3 is characterized in that, described NdFeB rare-earth permanent magnet is the sintered ndfeb permanent magnet body.
5. HALL sensor according to claim 3 is characterized in that, described permanent magnet is that maximum magnetic energy product is not less than 350KJ/m
3Permanent magnet.
6. HALL sensor according to claim 1 is characterized in that, the material of described shell is the ABS impact resistant plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610002883A CN101016687B (en) | 2006-02-09 | 2006-02-09 | HALL sensor applied for determining washing machine barrel bias |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610002883A CN101016687B (en) | 2006-02-09 | 2006-02-09 | HALL sensor applied for determining washing machine barrel bias |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101016687A CN101016687A (en) | 2007-08-15 |
| CN101016687B true CN101016687B (en) | 2010-05-12 |
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ID=38725899
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610002883A Active CN101016687B (en) | 2006-02-09 | 2006-02-09 | HALL sensor applied for determining washing machine barrel bias |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114554657B (en) * | 2022-04-27 | 2022-07-29 | 泉州艾奇科技有限公司 | Electronic product, adjusting device and adjusting function calibration method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074034A (en) * | 1992-10-22 | 1993-07-07 | 浙江大学 | High-voltage isolation-type Hall effect displacement sensor |
| CN2317465Y (en) * | 1997-04-04 | 1999-05-05 | 邹行德 | Rod sensor |
-
2006
- 2006-02-09 CN CN200610002883A patent/CN101016687B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1074034A (en) * | 1992-10-22 | 1993-07-07 | 浙江大学 | High-voltage isolation-type Hall effect displacement sensor |
| CN2317465Y (en) * | 1997-04-04 | 1999-05-05 | 邹行德 | Rod sensor |
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| CN101016687A (en) | 2007-08-15 |
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