CN1923570A - Vehicle rear-view mirror system - Google Patents
Vehicle rear-view mirror system Download PDFInfo
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- CN1923570A CN1923570A CN 200510098535 CN200510098535A CN1923570A CN 1923570 A CN1923570 A CN 1923570A CN 200510098535 CN200510098535 CN 200510098535 CN 200510098535 A CN200510098535 A CN 200510098535A CN 1923570 A CN1923570 A CN 1923570A
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- hall element
- minute surface
- view mirror
- mirror system
- vehicle rear
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- Rear-View Mirror Devices That Are Mounted On The Exterior Of The Vehicle (AREA)
Abstract
This invention, a rear view mirror system for cars, comprises of a mirror and a Hall sensor and a magnet formed Hall sensing module which couples with the mirror by the aid of the Hall sensor or a magnet that provides a magnetic field for the Hall sensor and makes it outlet original voltage signal and deviated voltage signal different from the original when the Hall sensor feels the magnaflux change with the mirror in motion. This rear view mirror system allows the application of the automatic positioning of the rear view mirror under severe traffic conditions.
Description
Technical field
The present invention relates to a kind of vehicle rear-view mirror system, particularly relate to a kind of vehicle rear-view mirror system that utilizes Hall element (Hallsensor) sensing position of rear view mirror to change.
Background technology
Vehicle mirrors is to be used to allow the driver watch situation behind both sides or the car, guarantees traffic safety.The back mirror that known automobile is equipped with has manual type and electrodynamic type.The manual type back mirror must be adjusted by the direct contact body of backsight mirror, and the electrodynamic type back mirror, the driver need only can reach the purpose of adjustment in the mode of pushing the adjustment button in car.When back mirror is subjected to external force influence and when having changed the position, must adjust again, caused the inconvenience of using, therefore the known back mirror of part utilizes resistive transducer, utilize the variable resistance principle, move on carbon film with a brush, detect the variation of resistance value, and then measure displacement.The driving of brush sees through a mechanism and carries out, and is divided into angular motion form and straight-line motion form.
Known resistive transducer is that resistance is embedded in the back mirror in configuration, embedded resistance value is noted at angle the time at minute surface.When minute surface was subjected to influencing of external force, resistance changed immediately, and calculate direction and amount of spin perpendicular to the rotation of the diaxon required correction of minute surface just by the change of program according to resistance this moment, reaches the purpose of self-orientation.
Yet be subjected to the influence of temperature or moist factor, carbon film can contraction or expansion, and brush also has the problem of friction in addition, cause use after a period of time can wearing and tearing, bad contact, resistance value also can thereby change.Because resistance can become greatly with the rising of environment and self temperature, and, be example with carboloy composition resistor AC resistance or direct current resistance, the frequency-response data of resistance, frequency is identical in the following resistance of 20KHZ.But because the influence of capacitance profile on the resistance, resistance value can descend along with the increase of frequency usually, therefore under the vehicle condition rugged environment, utilizes the back mirror of resistance-type location can't reach accurate location.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of vehicle rear-view mirror system, makes the automatic positioning function of back mirror can run on abominable vehicle condition environment.
Another object of the present invention is to provide a kind of vehicle rear-view mirror system, reduce the influence of the setting accuracy that sensing device produces because of environmental change.
To achieve these goals, the invention provides a kind of vehicle rear-view mirror system, comprise a minute surface and a Hall sensing module; The Hall sensing module comprises a Hall element and a magnetic substance, wherein Hall element or magnetic substance and minute surface coupling; Hall element is positioned at the magnetic field that magnetic substance produces, and exports an initial voltage signal; When moving with minute surface with the Hall element of minute surface coupling or magnetic substance, for Hall element, produce a magnetic flux change, Hall element can be sensed this magnetic flux change.
According to a preferred embodiment of the present invention, vehicle rear-view mirror system comprises minute surface, two groups of Hall sensing modules and a control module; Control module comprises two groups of actuating devices and a control circuit; Two groups of Hall sensing modules are arranged on two pivots center of minute surface, be responsible for the rotation sensing of two different pivot center directions respectively, and these two pivots center are orthogonal.
According to another preferred embodiment of the present invention, the connecting rod after the magnetic field source of hall sensor is designed to magnetize by provides.By the connecting rod that magnetizes, magnetic substance such as magnet must be set in addition in the system, cost will greatly be reduced, and reduce the extra time that is provided with.
Minute surface is adjusted to a normal place in advance in the system, and control circuit receives the voltage signal that this moment, Hall element was exported, and is converted to the setting value of normal place data, and with a memory device record.When being rotated by external force, minute surface produces displacement, owing to also produce displacement between Hall element and the magnetic substance thereupon, thereby changed the magnetic flow that Hall element is sensed, the output voltage of Hall element is also changed thereupon, the bias voltage may signal of output under mirror position change state.The bias voltage may signal outputs to control circuit, control circuit is converted into its calculating one deflection position data again, compare with the cooresponding normal place data of normal voltage signal, identify the angle variables of minute surface, and minute surface is adjusted according to this angle compensation amount accessory drive.
The present invention utilizes Hall element and magnetic substance that temperature is had preferable resistance, is installed in the automobile rearview mirror, to carry out the sensing of mirror position change, vehicle rear-view mirror system can be operated, for example hot environment in abominable vehicle condition environment.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Figure 1A is one of preferred embodiment of the present invention scheme drawing.
Figure 1B is control module scheme drawing in one of preferred embodiment of the present invention.
Fig. 2 is two scheme drawings of preferred embodiment of the present invention.
Fig. 3 is three scheme drawings of preferred embodiment of the present invention.
Wherein, Reference numeral:
102: picture frame 110: minute surface
112: 114: the first pivots center of arrow
116: the second pivot center 120a: the first Hall sensing module
120b: the second Hall sensing module 122a: first Hall element
122b: the second Hall element 124a: first magnetic substance
124b: second magnetic substance 130: control module
140: control circuit 142: memory device
150a, 150b: actuating device
202: pedestal 210: minute surface
216: the second pivots center of 214: the first pivots center
222: Hall element 224: connecting rod magnetizes
226: the connecting rod axis hole
302: minute surface holds body 304: bearing
314,316: pivot center 322: Hall element
324: sphero-joint
The specific embodiment
The invention provides a kind of vehicle carrier back mirror system that uses Hall element,, solved the inaccurate situation of known location of causing because of temperature effect by Hall element and magnet insensitivity to temperature.In order to make narration of the present invention more detailed and complete, can and cooperate Figure 1A and Figure 1B with reference to following description.
Figure 1A is one of preferred embodiment of the present invention scheme drawing.Vehicle rear-view mirror system of the present invention comprises a minute surface 110 and a Hall sensing module 120a.Hall sensing module 120a comprises a Hall element 122a and a magnetic substance 124a, and magnetic substance 124a provides a magnetic field for Hall element 122a, and Hall element 122a then exports an initial voltage signal accordingly.Hall sensing module 120a is by Hall element 122a or magnetic substance 124a and minute surface 110 couplings.When the parts of Hall sensing module 120a and minute surface 110 couplings move with minute surface 110, magnetic flow by Hall element 122a produces a magnetic flux change thereupon, Hall element 122a can respond to this magnetic flux change, and export a bias voltage may signal that is different from the initial voltage signal, judge the mobile status of minute surface 110 by this.
With reference to Figure 1B, be control module scheme drawing in one of preferred embodiment of the present invention simultaneously.In this preferred embodiment, vehicle rear-view mirror system comprises a minute surface 110, a picture frame 102, two groups of Hall sensing module 120a, 120b and control modules 130.Minute surface 110 is arranged at picture frame 102 opening parts, and control module 130 electrically connects Hall element 122a, 122b, with the signal of reception from Hall element 122a, 122b, and while and minute surface 110 couplings, to adjust the position of minute surface 110.
In this example, control module 130 comprises two actuating device 150a, 150b and a control circuit 140.Actuating device is in order to adjusting the position of minute surface 110, and is electrically connected at control circuit 140, for example is servomotor.Perhaps, the connection gear transmission device, its design is decided on different demands, also can use the twin shaft motor to be responsible for two axial drivings simultaneously.The first Hall sensing module 120a comprises the first Hall element 122a and the first magnetic substance 124a, and the second Hall sensing module 120b comprises the second Hall element 122b and the second magnetic substance 124b.Control circuit 140 accessory drive 150a, 150b with the rotation of adjustment minute surface 110, and comprise a memory device 142, in order to the record position data.
The parts that are coupled with minute surface 110 in each Hall sensing module, promptly Hall element or magnetic substance all are arranged on two pivots center 114,116 of minute surface 110, and this two pivot center is mutually perpendicular.Present embodiment is arranged at Hall element on the minute surface 110, for example is positioned at the minute surface outer rim.Be responsible for rotation direction of induction respectively for making the Hall sensing cell, Hall element can be arranged at the position by the pivot center of minute surface 110, the first Hall element 122a is provided with by first pivot center 114, the second Hall element 122b is provided with by second pivot center 116, makes on the circuit layout comparatively simple and convenient.
Magnetic substance then is arranged on picture frame 102 positions of contiguous Hall element.Under the consideration of design comfort feature and induction sensitivity, preferably, also simultaneously by each pivot center, promptly the first magnetic substance 124a is arranged on first pivot center 114, and the second magnetic substance 124b is arranged on second pivot center 116.
The operation situation of native system is described as follows.At first, the driver adjusts suitable mirror position, be referred to as normal place, induction receives a standard magnetic flow because Hall element is from the magnetic substance place, produce a normal voltage signal, see through a circuit and export this normal voltage signal to control module, and be converted to cooresponding normal place data, utilize memory device that this normal place data logging is got off.
When mirror position was subjected to external force and changes, driver's desire was replied mirror position, when next start-up system, only need adjust the setting of the stored normal place data of memory device.This moment is because the change of mirror position causes the Hall element that is arranged on the minute surface that locational variation is also arranged simultaneously, inevitable also generation of the relative position of Hall element and magnetic substance changes, the magnetic flow that Hall element is responded to also will be therefore different with standard magnetic flow, the voltage signal of being exported also is different from the normal voltage signal, is referred to as the bias voltage may signal.
For example, minute surface 110 is if rotate a drift angle along first pivot center 114, rotation direction is shown in arrow 112, there is no relative displacement between the first Hall element 122a among the first Hall sensing module 120a and the first magnetic substance 124a at this moment and produce, so the voltage signal that the first Hall element 122a is exported is identical with the voltage signal of standard.But this rotates and causes the second Hall element 122b and the second magnetic substance 124b to produce relative displacement, so magnetic flow is different with standard magnetic flow, thereby the voltage signal that the second Hall element 122b is exported also is different from the normal voltage signal.
Control circuit 140 receives this bias voltage may signal, converting thereof into is cooresponding displaced position data, and compare with the normal place data, can calculate required angle compensation amount, and transmit a control signal to actuating device 150a, impel the position of actuating device 150a change minute surface 110, reach the purpose of accurate self-orientation.
With reference to the 2nd figure, be two scheme drawings of preferred embodiment of the present invention.In this preferred embodiment, vehicle rear-view mirror system comprises a pedestal 202 and a connecting rod 224 that magnetizes, and the connecting rod 224 that magnetizes stretches out from the connecting rod axis hole 226 on the pedestal 202.To magnetize in order to the connecting rod of adjusting mirror angle in the vehicle mirrors, making becomes alnico magnets, as the magnetic substance in the foregoing description.Hall element 222 then is arranged at the position of the close connecting rod 224 that magnetizes on the pedestal, and is positioned on first pivot center 214.The connecting rod 224 that magnetizes after magnetizing provides a magnetic field to Hall element 222, when minute surface 210 is subjected to the external force effect and is offset an angle position, move with the minute surface 210 bonded assemblys connecting rod 224 that magnetizes thereupon, therefore the magnetic flow responded to of Hall element 222 also can change, and the output voltage signal is also just different.
The cost of acquiring magnetic substance is in addition not only saved in the magnetize design of connecting rod of this kind, has also saved the time that magnetic substance is set, and will significantly improve the production production capacity.What must pay special attention to is, be simplified illustration, only draw a Hall element 222 and a connecting rod 224 that magnetizes in the diagram, it is responsible for the rotation sensing of minute surface 210 in pivot center 214 directions, have the knack of this operator and can understand, carry out the device combination of rotating and be same as aforementioned in second pivot center, 216 directions with reference to after the above-mentioned explanation.
With reference to the 3rd figure, be three scheme drawings of preferred embodiment of the present invention.In this preferred embodiment, a sphero-joint 324 that the support minute surface is held body 302 magnetizes, this sphero-joint 324 that magnetizes holds a rotating fulcrum of body 302 in order to minute surface to be provided, minute surface is rotated, and provide a magnetic field to Hall element 322 simultaneously, Hall element 322 is arranged near magnetizing sphero-joint 324 places, use two Hall elements 322 in this example, be arranged at minute surface respectively and hold on the body 302,, and be positioned on two pivots center 314 and 316 near bearing 304 places of the ccontaining sphero-joint 324 that magnetizes.When the mirror position variation, that is sphero-joint 324 rotations of magnetizing, the magnetic flow that causes Hall element 322 to sense also changes, thereby has reached the purpose that the detecting mirror position moves.
By the invention described above preferred embodiment as can be known, use the present invention and have following advantage.Vehicle mirrors of the present invention utilizes the Hall sensing module to comprise that magnetic substance and Hall element are difficult for the characteristic of temperature influence, the problem that adopts the resistance-type sensing device to be met with for known back mirror provides a good solution, not only actv. has improved the vehicle condition environmental field that back mirror is suitable for, and has also reached good accurate positioning degree.
The present invention can utilize the intraware of the vehicle mirrors that magnetizes to serve as magnetic substance in the Hall sensing module, more helps improving speed of production and saving expends cost.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the utility model.
Claims (10)
1, a kind of vehicle rear-view mirror system comprises: a minute surface; And at least one Hall sensing module, it is characterized in that described Hall sensing module comprises at least:
One Hall element; And
One magnetic substance for this Hall element provides a magnetic field, makes this Hall element fail an initial voltage signal,
This Hall sensing module is by this Hall element or this magnetic substance and the coupling of this minute surface, and when this minute surface moved, this Hall element was responded to a magnetic flux change, and output is different from a bias voltage may signal of this initial voltage signal.
According to the described vehicle rear-view mirror system of claim 1, it is characterized in that 2, this Hall element is coupled in this minute surface, this magnetic substance is positioned at the position of close this Hall element on the picture frame.
According to the described vehicle rear-view mirror system of claim 1, it is characterized in that 3, this magnetic substance is coupled in this minute surface, this Hall element is positioned at the position of close this magnetic substance on the picture frame.
4, according to the described vehicle rear-view mirror system of claim 1, it is characterized in that, comprise a control circuit, this control circuit receives and changes this normal voltage signal and this bias voltage may signal respectively, make it to become normal place data and single place shift and put data, go out an angle compensation amount according to these normal place data and this displaced position data computation.
According to the described vehicle rear-view mirror system of claim 4, it is characterized in that 5, this control circuit has a memory device, this memory device writes down this normal place data.
6, according to the described vehicle rear-view mirror system of claim 4, it is characterized in that, comprise an actuating device, electrically connect with this control circuit and be coupled to this minute surface, be subjected to this control circuit control to adjust this minute surface.
According to the described vehicle rear-view mirror system of claim 1, it is characterized in that 7, this magnetic substance is the sphero-joint that magnetizes, and has permanent magnet type, is coupled to this minute surface, and as a rotating fulcrum of this minute surface
8, a kind of vehicle rear-view mirror system is characterized in that, comprising:
One minute surface;
At least one connecting rod that magnetizes has permanent magnet type, is connected in this minute surface, in order to promote this minute surface, changes the position of minute surface; And
One Hall element is positioned near this connecting rod that magnetizes,
This connecting rod that magnetizes provides a magnetic field to this Hall element, make this Hall element export an initial voltage signal, when this connecting rod that magnetizes promotes and moves with this minute surface, this Hall element is responded to a magnetic flux change, and output is different from a bias voltage may signal of this initial voltage signal.
9, described according to Claim 8 vehicle rear-view mirror system, it is characterized in that, comprise a control circuit, this control circuit receives and changes this normal voltage signal and this bias voltage may signal of this Hall element respectively, make it to become normal place data and single place shift and put data, go out an angle compensation amount according to these normal place data and this displaced position data computation.
10, described according to Claim 8 vehicle rear-view mirror system is characterized in that, this Hall element is positioned at the position of the close connecting rod that magnetizes on the pedestal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510098535 CN1923570A (en) | 2005-09-02 | 2005-09-02 | Vehicle rear-view mirror system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510098535 CN1923570A (en) | 2005-09-02 | 2005-09-02 | Vehicle rear-view mirror system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1923570A true CN1923570A (en) | 2007-03-07 |
Family
ID=37816453
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510098535 Pending CN1923570A (en) | 2005-09-02 | 2005-09-02 | Vehicle rear-view mirror system |
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| Country | Link |
|---|---|
| CN (1) | CN1923570A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016101201A1 (en) * | 2014-12-25 | 2016-06-30 | 记铭工业股份有限公司 | Rearview mirror drive structure improvement with angle feedback control |
| CN107139842A (en) * | 2017-05-27 | 2017-09-08 | 成都创科升电子科技有限责任公司 | Control system for adjusting vehicle mirrors |
-
2005
- 2005-09-02 CN CN 200510098535 patent/CN1923570A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016101201A1 (en) * | 2014-12-25 | 2016-06-30 | 记铭工业股份有限公司 | Rearview mirror drive structure improvement with angle feedback control |
| CN107139842A (en) * | 2017-05-27 | 2017-09-08 | 成都创科升电子科技有限责任公司 | Control system for adjusting vehicle mirrors |
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