CN203305890U - Automobile brake lamp sensor - Google Patents
Automobile brake lamp sensor Download PDFInfo
- Publication number
- CN203305890U CN203305890U CN2013203306791U CN201320330679U CN203305890U CN 203305890 U CN203305890 U CN 203305890U CN 2013203306791 U CN2013203306791 U CN 2013203306791U CN 201320330679 U CN201320330679 U CN 201320330679U CN 203305890 U CN203305890 U CN 203305890U
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- switching element
- magnetic
- permanent magnet
- hall switching
- piston
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Abstract
The utility model discloses an automobile brake lamp sensor. The automobile brake lamp sensor comprises a brake main cylinder, a piston, a permanent magnet, a hall switch element and a sensing device, wherein the piston is positioned in the brake main cylinder, can displace along the axis of the brake main cylinder and is provided with the permanent magnet; when the piston displaces, the permanent magnet which is arranged on the piston displaces together; the sensing device with the hall switch element is arranged outside the brake main cylinder; the hall switch element is used for sensing the variation in magnetic field strength of the permanent magnet; the brake main cylinder, the sensing device and the hall switch element in the sensing device form a whole body which produces relative moment with a whole body consisting of the piston and the permanent magnet during automobile brake.
Description
Technical field
The utility model relates to a kind of sensor, relates in particular to a kind of automobile brake lamp sensor.
Background technology
Generally, the unlatching of automobile brake lamp is, by the automobile brake pedal below, the opening and closing that a shift knob is directly controlled automobile brake lamp are installed.This kind mode is that the mechanical contact switch is controlled, and be restricted its service life.
The utility model content
For above problem the utility model, provide a kind of long service life, and can strengthen the automobile brake lamp sensor of braking safety.
This sensor is converted into the automobile brake action electric signal and flows to automotive control system.Avoid the mechanical contact mode of operation, increase product service life.This sensing system is the component part of brake system of car, and needing can the direct-detection braking maneuver and provide the opening and closing that electric signal is controlled automobile brake lamp, the real-time reminding front vehicle, and vehicle is in braking mode.
In order to overcome the above problems the utility model, provide a kind of automobile brake lamp sensor, it is characterized in that: comprise master brake cylinder, piston, permanent magnet, Hall switching element, induction installation;
Piston is positioned at master brake cylinder inside, can permanent magnet be installed on piston along the master brake cylinder axis shift, when piston is subjected to displacement, is arranged on the also and then displacement together of permanent magnet on piston;
In the master brake cylinder outside, the induction installation with Hall switching element is installed, Hall switching element is for responding to the change of magnetic field strength of permanent magnet;
Master brake cylinder and induction installation and inner Hall switching element thereof form a whole, and the integral body formed with piston and permanent magnet produces relative motion when automobile brake.
Described permanent magnet is annular, and the axis direction of annular is its magnetizing direction.
In described permanent magnet, magnetic line of force passes the induction point of Hall switching element, the magnetic-field intensity B of this point
0Horizontal component be the invalid magnetic field B at sensor Hall switching element induction point place
1, the magnetic-field intensity B of this point
0Normal component be the effective magnetic field B at Hall switching element induction point place
2, described effective magnetic field B
2Be the magnetic field of forward perpendicular to Hall switching element induction point direction.
The magnetic-field intensity that described Hall switching element is opened is 3.4-7.7 mT, the magnetic-field intensity 1.8-5.4mT closed.
Beneficial effect: the utility model sensor adopts based on being the Hall effect principle design, with mechanical switch comparison before, has avoided
The problem of the product deficiency in service life of bringing because of mechanical wear, thus the brake safe performance increased for automobile.
The accompanying drawing explanation
Fig. 1 is the structural representation of the utility model sensing system;
Fig. 2 is the effective magnetic field intensity schematic diagram that the utility model sensor adopts;
Fig. 3 is the variation schematic diagram of the utility model sensor effective magnetic field intensity when automobile brake;
Fig. 4 is the variation schematic diagram of the utility model sensor magnetic-field intensity when 0 magnetic field;
Fig. 5 is the variation schematic diagram of this bright sensor effective magnetic field intensity when automobile brake discharges.
The specific embodiment
The utility model will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, the utility model automobile brake lamp sensor comprises master brake cylinder 1, piston 2, permanent magnet 3, Hall switching element 4, induction installation 5.
Automobile brake lamp sensor described in the utility model is converted into the automobile brake action variation of magnetic-field intensity, then the variation of magnetic-field intensity is converted into to electric signal and flows to automotive control system.
When automobile brake on brake system of car the piston 2 of master brake cylinder 1 inside along master brake cylinder 1 axis shift, they coordinate compression brake liquid to carry out automobile brake, the utility model utilizes this characteristics, mounting permanent magnet 3 on the piston 2 of master brake cylinder 1, piston 2 when automobile brake in master brake cylinder 1 is subjected to displacement, thereby be arranged on the also and then displacement together of permanent magnet 3 on piston 2, so just braking maneuver changed into to certain Shang De magnetic field, fixed position on master cylinder and changed.
In master brake cylinder 1 outside, the induction installation 5 with Hall switching element 4 is installed, utilize the Hall effect principle, when braking occurs in automobile, piston 2 displacements in master brake cylinder 1 are with permanent magnet 3 motions, the interior Hall switching element 4 of induction installation 5 that is arranged on master brake cylinder 1 outside is responded to the change of magnetic field strength of permanent magnets, and the electric signal that in the time of Hall switching element 4 induced field Strength Changes, induction installation 5 changes flows to automotive control system.This wherein comprises two parts:
A. be arranged in the induction installation 5 on master brake cylinder 1 Hall switching element 4 is installed, the permanent magnet 3 be arranged on when automobile brake on master brake cylinder 1 is subjected to displacement, with respect to the induction installation 5 on master cylinder, the magnetic-field intensity at the induction point place on its Hall switching element 4 changes, and Hall switching element produces on-off signal when magnetic-field intensity reaches certain value (1.8-7.7mT);
Master brake cylinder 1 and induction installation 5 and inner Hall switching element 4 thereof form a whole, and the integral body formed with piston 2 and permanent magnet 3 produces relative motion when automobile brake.In this process, Hall switching element 4 induction point place magnetic-field intensitys change, and change procedure is as follows.
As shown in Figure 2, the S utmost point 6 of permanent magnet 3 and permanent magnet N pole 7, in permanent magnet 3, magnetic line of force 8 passes the induction point of Hall switching element 4, the magnetic-field intensity B of this point
011 horizontal component is the invalid magnetic field B at sensor Hall switching element 4 induction point places
19, the magnetic-field intensity B of this point
011 normal component is the effective magnetic field B at Hall switching element 4 induction point places
210.
1) annotate: the utility model sensor adopts Hall switching element 4 as sensing element, and it utilizes the magnetic bias of permanent magnet 3 (is the magnetic field of forward perpendicular to Hall switching element 4 induction point directions, that is effective magnetic field B
210) induction changes, and is forward magnetic field effectively (being the magnetic field of forward perpendicular to Hall switching element 4 induction points);
2) annotate: the permanent magnet 3 that the utility model adopts is annular, and the axis direction of annular is its magnetizing direction, to guarantee above-mentioned 1) want
The forward bias magnetic field of asking.
As shown in Figure 3, the variation of effective magnetic field intensity when automobile brake: the S utmost point 6 of permanent magnet 3 and permanent magnet N pole 7, in permanent magnet 3, magnetic line of force 8 passes the induction point of Hall switching element 4, the magnetic-field intensity B of this point
314 horizontal component is the invalid magnetic field B at sensor Hall switching element 4 induction point places
412, the magnetic-field intensity B of this point
314 normal component is the effective magnetic field B at Hall switching element 4 induction point places
513.
As Fig. 4 institute, the variation of magnetic-field intensity when 0 magnetic field: the S utmost point 6 of permanent magnet 3 and permanent magnet N pole 7, in permanent magnet 3, magnetic line of force 8 passes the induction point of Hall switching element 4, the magnetic-field intensity B of this point
615 are entirely horizontal component, without normal component, i.e. and this magnetic-field intensity B
615 normal component is 0.
During automobile brake, the permanent magnet 3 be arranged on master brake cylinder 1 is subjected to displacement, with respect to the induction installation 5 on master cylinder, the magnetic-field intensity at the induction point place on its Hall switching element 4 changes, magnetic-field intensity is this Dian Chu magnetic field of 0 mT(on perpendicular to Hall switching element 4 directions without magnetic bias at initial condition and Hall switching element 4 induction point magnetic-field intensitys, i.e. effective magnetic field B
210 is 0 mT), i.e. magnetic-field intensity B shown in Figure 4
6Between 15, change, during this, produce effective magnetic field intensity B shown in Figure 3
513 magnetic-field intensity points, the scope of its magnetic-field intensity is 3.4-7.7 mT.Now Hall switching element 4 is opened, and changes into the required electric signal control automobile brake lamp of brake system of car by induction installation 5.
As shown in Figure 5, the variation of effective magnetic field intensity when automobile brake discharges: the S utmost point 6 of permanent magnet 3 and permanent magnet N pole 7, in permanent magnet 3, magnetic line of force 8 passes the induction point of Hall switching element 4, the magnetic-field intensity B of this point
718 horizontal component is the invalid magnetic field B at sensor Hall switching element 4 induction point places
816, magnetic-field intensity B
718 normal component is the effective magnetic field B at Hall switching element 4 induction point places
817.
When automobile brake discharges, the permanent magnet 3 be arranged on master brake cylinder 1 is subjected to displacement, with respect to the induction installation 5 on master cylinder, the magnetic-field intensity at the induction point place on its Hall switching element 4 changes, magnetic-field intensity is this Dian Chu magnetic field of 0 mT(on perpendicular to Hall switching element 4 directions without magnetic bias at Hall switching element 4 induction point magnetic-field intensitys, i.e. effective magnetic field B
210 is 0 mT), i.e. magnetic-field intensity B shown in Figure 4
615 and initial condition between change, during this, produce effective magnetic field intensity B shown in Figure 5
817 magnetic-field intensity points, the scope of its magnetic-field intensity is 1.8-5.4mT, now Hall switching element 4 is closed, and changes into the required electric signal control automobile brake lamp of brake system of car by induction installation 5.
Select Hall switching element 4, the work magnetic-field intensity characteristics of Hall switching element 4 are as shown in following table .1.(product work range of temperatures :-40 ℃～140 ℃)
Table .1
By above-mentioned Hall switching element 4 work magnetic-field intensity characteristics, learn, the magnetic-field intensity scope of Hall switching element 4 is 1.8-7.7mT, namely as long as Hall switching element 4 just opens and closes in this scope.
B. after Hall element generation on-off signal, change into the high-low level signal through the sensor treatment circuit that on-off signal can be converted to the high-low level signal and flow to automotive control system.
The foregoing is only preferred embodiment of the present utility model, be not restricted to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present utility model.
Claims (5)
1. an automobile brake lamp sensor, is characterized in that: comprise master brake cylinder (1), piston (2), permanent magnet (3), Hall switching element (4), induction installation (5);
Piston (2) is positioned at master brake cylinder (1) inside, can be along master brake cylinder (1) axis shift, permanent magnet (3) is installed on piston (2), while being subjected to displacement, is arranged on the also and then displacement together of permanent magnet (3) on piston (2) when piston (2);
In master brake cylinder (1) outside, the induction installation (5) with Hall switching element (4) is installed, Hall switching element (4) is be used to responding to the change of magnetic field strength of permanent magnet (3);
Master brake cylinder (1) and induction installation (5) and inner Hall switching element (4) thereof form a whole, and the integral body formed with piston (2) and permanent magnet (3) is the generation relative motion when automobile brake.
2. automobile brake lamp sensor according to claim 1 is characterized in that: described permanent magnet (3) is annular, and the axis direction of annular is its magnetizing direction.
3. automobile brake lamp sensor according to claim 1 and 2 is characterized in that: in described permanent magnet (3), magnetic line of force (8) passes the induction point of Hall switching element (4), the magnetic-field intensity B of this point
0(11) horizontal component is the invalid magnetic field B at sensor Hall switching element (4) induction point place
1(9), the magnetic-field intensity B of this point
0(11) normal component is the effective magnetic field B at Hall switching element (4) induction point place
2(10), described effective magnetic field B
2(10) be the magnetic field of forward perpendicular to Hall switching element (4) induction point direction.
4. automobile brake lamp sensor according to claim 1 and 2, it is characterized in that: the magnetic-field intensity that described Hall switching element (4) is opened is 3.4-7.7 mT, the magnetic-field intensity 1.8-5.4mT closed.
5. automobile brake lamp sensor according to claim 3, it is characterized in that: the magnetic-field intensity that described Hall switching element (4) is opened is 3.4-7.7 mT, the magnetic-field intensity 1.8-5.4mT closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203306791U CN203305890U (en) | 2013-06-08 | 2013-06-08 | Automobile brake lamp sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203306791U CN203305890U (en) | 2013-06-08 | 2013-06-08 | Automobile brake lamp sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203305890U true CN203305890U (en) | 2013-11-27 |
Family
ID=49612117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203306791U Expired - Lifetime CN203305890U (en) | 2013-06-08 | 2013-06-08 | Automobile brake lamp sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203305890U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264657A (en) * | 2013-06-08 | 2013-08-28 | 昆山市兴利车辆科技配套有限公司 | Vehicle brake lamp sensor |
-
2013
- 2013-06-08 CN CN2013203306791U patent/CN203305890U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264657A (en) * | 2013-06-08 | 2013-08-28 | 昆山市兴利车辆科技配套有限公司 | Vehicle brake lamp sensor |
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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 |
Granted publication date: 20131127 |
|
| CX01 | Expiry of patent term |