CN102565448A - Novel automobile wheel speed sensor - Google Patents
Novel automobile wheel speed sensor Download PDFInfo
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- CN102565448A CN102565448A CN2012100116051A CN201210011605A CN102565448A CN 102565448 A CN102565448 A CN 102565448A CN 2012100116051 A CN2012100116051 A CN 2012100116051A CN 201210011605 A CN201210011605 A CN 201210011605A CN 102565448 A CN102565448 A CN 102565448A
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- magnetoresistive transducer
- higher temperature
- wheel speed
- transducer chip
- temperature line
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Abstract
The invention discloses a novel automobile wheel speed sensor, which comprises a plug, a high temperature wire, a magnet, a reluctance sensor chip and an additional capacitor. The reluctance sensor chip, the magnet and the additional capacitor are connected in parallel and packaged inside a sealing assembly, the ends of the reluctance sensor chip are exposed out of the sealing assembly, two ends of the high temperature wire are respectively connected with a pin of the plug and the reluctance sensor chip, and a fixing structure is arranged on the middle portion of the high temperature wire to be fixed with an automobile body. The novel automobile wheel speed sensor uses a reluctance sensor, a giant magneto resistive (GMR) effect sensor is sensitive to subtle changes in the magnetic field, and accordingly the location and displacement of gear ring rotation can be measured accurately. Compared with Hall effect sensors and magneto-electric sensors, GMR chips have strong output signals.
Description
Technical field
The present invention relates to sensor technology, particularly be suitable for the wheel speed sensors of anti-locking system for car.
Background technology
Anti-lock braking system in automobiles relates to running safety, particularly employed wheel speed sensors, and the quality of its performance directly has influence on the quality of automobile brake perfrmance.The wheel speed sensors that existing anti-lock braking system in automobiles is used adopts the magneto-electric wheel speed sensors mostly.The shortcoming of this wheel speed sensors is that structure and manufacturing processing technic are complicated, and anti-electromagnetic interference capability is poor, when the vehicle rotating speed is higher than a certain rotating speed, just exports signal, and frequency response was insensitive when rotating speed was fast.In order to overcome the shortcoming of this kind sensor, begin to adopt hall sensor at present, this kind sensor output signal amplitude is constant, and frequency response is high, and anti-electromagnetic interference capability is strong, and also exportable signal has improved accuracy of measurement and reliability under the utmost point slow-speed of revolution.But the chip technology that is adopted is monopolized by overseas enterprise, and chip is external import, makes the automobile wheel speed sensor cost high.
Summary of the invention
Technical matters to be solved by this invention just provides a kind of novel automobile wheel speed sensor, and is simple in structure, signal stabilization, effective anti-electromagnetic interference (EMI), frequency response sensitivity, with low cost, stable performance.
For solving the problems of the technologies described above; The present invention adopts following technical scheme: a kind of novel automobile wheel speed sensor; It is characterized in that: comprise a plug, a higher temperature line, a magnet, a magnetoresistive transducer chip and an additional capacitor; Said magnetoresistive transducer chip, magnet is parallelly connected with additional capacitor and be packaged in seal assembly inside; Seal assembly is exposed in magnetoresistive transducer chip end, and the higher temperature line two ends are the contact pin and the magnetoresistive transducer chip of attachment plug respectively, and fixed sturcture is set at the higher temperature line middle part and body of a motor car is fixed.
As preferably, the end that said seal assembly outer most surrounding magnetoresistive transducer chip exposes is provided with an annular groove and O type circle is installed.
As preferably, said magnetoresistive transducer chip xsect is a square, magnetoresistive transducer chip and higher temperature line welding, magnetoresistive transducer chip center line and the interior angle of 105 °～115 ° scopes of higher temperature line axis existence.
As preferably, said fixed sturcture is at least two sleeve pipes and at least two buckles that are installed on the higher temperature line that are socketed on the higher temperature line.
The present invention adopts magnetoresistive transducer (being the GMR effect sensor), and the GMR effect sensor is very sensitive for the little variation in the magnetic field, thereby can measure position and displacement that gear ring rotates accurately.The GMR chip has stronger output signal with respect to hall effect sensor and magnetoelectric sensor.Frequency response range of the present invention is 0～1MHz, and working range is higher than magnetoelectric sensor and hall sensor far away.Thereby simple in structure, signal stabilization, effective anti-electromagnetic interference (EMI), frequency response are responsive, cost is low, can effectively improve the stability of wheel speed sensors.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further described:
Fig. 1 is a reluctance type automobile wheel speed sensor synoptic diagram of the present invention.
Embodiment
As shown in Figure 1; Embodiment for automobile wheel speed sensor of the present invention; Comprise a plug, a higher temperature line 13, a magnet, a magnetoresistive transducer chip 14 and an additional capacitor, said magnetoresistive transducer chip, magnet is parallelly connected with additional capacitor and be packaged in seal assembly inside, and seal assembly is exposed in magnetoresistive transducer chip end; The higher temperature line two ends are the contact pin 3 and magnetoresistive transducer chip of attachment plug respectively, and fixed sturcture is set at the higher temperature line middle part and body of a motor car is fixed.The end that said seal assembly outer most surrounding magnetoresistive transducer chip 14 exposes is provided with an annular groove and O type circle 15 is installed.Said magnetoresistive transducer chip 14 xsects are square, magnetoresistive transducer chip and higher temperature line 13 welding, and there are the angle in 105 °～115 ° scopes in magnetoresistive transducer chip center line and higher temperature line axis.Said fixed sturcture is at least two sleeve pipe and at least two buckles that are installed on the higher temperature line that are socketed on the higher temperature line 13.
Said plug comprises an edge connector headgear 1, and edge connector headgear 1 internal fixation has contact pin 3, top mounting receptacle overcoat 2, and contact pin 3 and higher temperature line 13 welding, plug 4 is used for fixing the position of contact pin 3 in edge connector head 1 cover in No. 1 plug.Baffle plate 5 is used for fixing contact pin 3.No. 2 interior plugs 6 of plug are used for fixing the position of higher temperature line 13.Plug back seat 7 and 1 assembling of edge connector headgear, being used for filling in the polarized plug 6 can't be along moving axially.Plug cover for seat 8 big ends are nested together with plug cover for seat 1, and small end is enclosed within on the higher temperature line 13.No. 1 buckle 9 is fixed on No. 2 sleeve pipes 10, and No. 2 sleeve pipe 10 fixed covers are on higher temperature line 13.No. 1 sleeve pipe 11 fixed covers are on higher temperature line 13.No. 2 buckles 12 are fixed on the sleeve pipe identical with No. 2 sleeve pipes 10, and sleeve pipe and higher temperature line 13 are fixing.Seal assembly inside is packaged with magnetoresistive transducer chip 14, and there is an annular groove outside, is used to install O type circle 15.Magnetoresistive transducer 14 xsects are square, and with higher temperature line 13 welding, there are an angle in its center line and higher temperature line 13 axis.
Design feature of the present invention is in seal assembly, to be sealed with magnet, magnetoresistive transducer chip, additional capacitor.Magnetoresistive transducer core, flat thin magnet are parallelly connected with additional capacitor.
Plug is connected with socket on being installed in automobile, and the vehicle wheel rotational speed signal is sent to ECU.The magnetoresistive transducer chip utilizes giant magnetoresistance effect to process.When the magneto-resistor of some magnetic or alloy material sharply reduces under the certain magnetic field effect, and its resistance change rate sharply increases.The magnetoresistive transducer chip is packaged together by GMR element and magnet and forms, and the GMR element is between a magnet and a gear ring.When gear ring rotates, DISTRIBUTION OF MAGNETIC FIELD will change, thereby in the GMR element, produce the corresponding digital square-wave signal.Electric capacity is attempted by on the both positive and negative polarity pin of GMR chip, is used to absorb the outside high-frequency electromagnetic undesired signal that produces.
After installing, sensor seal assembly of the present invention is positioned at the below of gear ring.Cause that when gear ring rotates the Distribution of Magnetic Field of passing the magnetoresistive transducer chip changes, thereby in the magnetoresistive transducer chip, produce the digitizing square-wave signal of corresponding representative wheel speed.Electric capacity is attempted by on the both positive and negative polarity pin of GMR chip, is used to absorb the outside high-frequency electromagnetic undesired signal that produces.
Claims (4)
1. novel automobile wheel speed sensor; It is characterized in that: comprise a plug, a higher temperature line (13), a magnet, a magnetoresistive transducer chip (14) and an additional capacitor; Said magnetoresistive transducer chip, magnet is parallelly connected with additional capacitor and be packaged in seal assembly inside; Seal assembly is exposed in magnetoresistive transducer chip end, and the higher temperature line two ends are the contact pin (3) and the magnetoresistive transducer chip of attachment plug respectively, and fixed sturcture is set at the higher temperature line middle part and body of a motor car is fixed.
2. a kind of novel automobile wheel speed sensor according to claim 1 is characterized in that: the end that said seal assembly outer most surrounding magnetoresistive transducer chip (14) exposes is provided with an annular groove and O type circle (15) is installed.
3. a kind of novel automobile wheel speed sensor according to claim 1; It is characterized in that: said magnetoresistive transducer chip (14) xsect is square; Magnetoresistive transducer chip and higher temperature line (13) welding, there are the angle in 105 °～115 ° scopes in magnetoresistive transducer chip center line and higher temperature line axis.
4. a kind of novel automobile wheel speed sensor according to claim 1 is characterized in that: said fixed sturcture is at least two sleeve pipe and at least two buckles that are installed on the higher temperature line that are socketed on the higher temperature line (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210011605.1A CN102565448B (en) | 2012-01-14 | 2012-01-14 | Automobile wheel speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210011605.1A CN102565448B (en) | 2012-01-14 | 2012-01-14 | Automobile wheel speed sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102565448A true CN102565448A (en) | 2012-07-11 |
| CN102565448B CN102565448B (en) | 2014-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210011605.1A Active CN102565448B (en) | 2012-01-14 | 2012-01-14 | Automobile wheel speed sensor |
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| Country | Link |
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| CN (1) | CN102565448B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490110A (en) * | 2014-09-15 | 2016-04-13 | 瑞安市麦格电子科技有限公司 | Abs sensor plug |
| CN106324288A (en) * | 2016-09-28 | 2017-01-11 | 苏州科技大学 | Wheel speed sensor testing apparatus and testing method |
| CN110344148A (en) * | 2019-07-30 | 2019-10-18 | 中原工学院 | A kind of magneto-electric Yarn-spinning spindle power sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327077A (en) * | 1992-01-06 | 1994-07-05 | Murata Mfg. Co. Ltd. | Device including an even number of equally spaced magneto-resistors for detecting rotation or straight motion of a moving body |
| CN102119334A (en) * | 2008-08-11 | 2011-07-06 | Ntn株式会社 | Rotation sensor |
| CN202453364U (en) * | 2012-01-14 | 2012-09-26 | 浙江兆丰机电股份有限公司 | Novel automotive wheel speed sensor |
-
2012
- 2012-01-14 CN CN201210011605.1A patent/CN102565448B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327077A (en) * | 1992-01-06 | 1994-07-05 | Murata Mfg. Co. Ltd. | Device including an even number of equally spaced magneto-resistors for detecting rotation or straight motion of a moving body |
| CN102119334A (en) * | 2008-08-11 | 2011-07-06 | Ntn株式会社 | Rotation sensor |
| CN202453364U (en) * | 2012-01-14 | 2012-09-26 | 浙江兆丰机电股份有限公司 | Novel automotive wheel speed sensor |
Non-Patent Citations (1)
| Title |
|---|
| 秦玉伟等: "磁阻式轮速传感器在ABS中的应用", 《仪表技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105490110A (en) * | 2014-09-15 | 2016-04-13 | 瑞安市麦格电子科技有限公司 | Abs sensor plug |
| CN106324288A (en) * | 2016-09-28 | 2017-01-11 | 苏州科技大学 | Wheel speed sensor testing apparatus and testing method |
| CN110344148A (en) * | 2019-07-30 | 2019-10-18 | 中原工学院 | A kind of magneto-electric Yarn-spinning spindle power sensor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102565448B (en) | 2014-02-05 |
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