CN101858923A - Giant magnetic resistor speed measuring sensor - Google Patents
Giant magnetic resistor speed measuring sensor Download PDFInfo
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- CN101858923A CN101858923A CN201010161711A CN201010161711A CN101858923A CN 101858923 A CN101858923 A CN 101858923A CN 201010161711 A CN201010161711 A CN 201010161711A CN 201010161711 A CN201010161711 A CN 201010161711A CN 101858923 A CN101858923 A CN 101858923A
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- measuring sensor
- speed measuring
- magnetic resistor
- circuit board
- giant magnetic
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- Measuring Magnetic Variables (AREA)
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Abstract
The invention discloses a giant magnetic resistor speed measuring sensor for vehicle speed measurement, which comprises a hollow outer shell; a signal processing circuit board and a sensitive element which is electrically connected with one end of the circuit board are arranged in the hollow outer shell; a high-temperature magnet is arranged between the signal processing circuit board and the sensitive element; and the other end of the signal processing circuit board is connected with a cable, and the cable is further connected with a plugging terminal. By adopting a giant magnetic resistor chip with high sensitivity, the sensing distance of the giant magnetic resistor speed measuring sensor is generally 1.5 to 2 times of that of a general Hall sensor, output signals are not affected by the rotating frequency of a gear when the installation distance is fixed, the signals can be detected from 0KHz to 15KHz, the working temperature range is -40 to -150DEG C, the thermal stability is high and the anti-interference capability is strong.
Description
Technical field
The invention belongs to the tachogenerator field, be specifically related to a kind of giant magnetic resistor speed measuring sensor.
Background technology
Vehicle in the process of moving, the driver needs the speed of instant understanding vehicle ' so that make corresponding reaction, in addition, some driving ancillary equipments also need to obtain immediately the speed of vehicle ' so that adjust vehicle condition.
The tradition product that tests the speed mainly comprises hall effect sensor and electromagnetic sensor, and wherein the major defect of electromagnetic sensor is to be subject to the gear rotation dynamic frequency, almost can't sense signal when frequency is low; The major defect of hall effect sensor then is that sensitivity is low, and distance of reaction is nearer, because sensor internal has the biasing magnet steel, sensor head can be adsorbed tiny iron filings, if distance of reaction is crossed and closely then can be touched gear and cause fault.
1988, Fert research group of Paris, FRA university is in the magnetoresistance effect of nanostructured, find the phenomenon of film resistance with externally-applied magnetic field generation great variety, more traditional magnetic anisotropy magneto-resistor (AMR) is big one more than the order of magnitude, is referred to as giant magnetoresistance (GMR) effect.
Utilize giant magnetoresistance effect as the vehicle speed measuring sensor have traditional sensors incomparable superiority, yet a kind of product of maturation does not also appear in the market, be necessary this further to study in fact to promote development of technologies.
Based on this, the inventor has drawn a kind of vehicle speed measuring sensor that utilizes giant magnetoresistance effect finally based on research for many years.
Summary of the invention
The object of the present invention is to provide a kind of giant magnetic resistor speed measuring sensor, the speed that the instant measuring vehicle of this sensor energy is travelled.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of giant magnetic resistor speed measuring sensor, comprise a hollow shell, be provided with a signal processing circuit board and one and the sensitive element that electrically connects of one end in the described hollow shell, be provided with high temperature magnet between described signal processing circuit board and the described sensitive element, the described signal processing circuit board other end connects a cable, and described cable also connects an inserting terminal.
Further, the inner encapsulated epoxy resin glue of described hollow shell.
Further, described hollow shell is provided with protection copper lid near sensitive element one end, and the other end is provided with the back over cap.
Further, described sensitive element is the giant magnetoresistance chip.
Further, the material of described hollow shell is the magnetic conduction ferrous materials.
Giant magnetic resistor speed measuring sensor of the present invention is owing to adopt highly sensitive giant magnetoresistance chip, distance of reaction is 1.5-2 a times of general Hall element, and mounting distance fixedly the time output signal be not subjected to the influence of gear rotation dynamic frequency, 0-15KHz can detect signal, its operating temperature range is-40-150 ℃, the thermal stability height, antijamming capability is strong.
Above-mentioned explanation only is the general introduction of technical solution of the present invention, for can clearer understanding technological means of the present invention, and can be implemented according to the content of instructions, below with preferred embodiment of the present invention and conjunction with figs. describe in detail as after.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Description of drawings
Fig. 1 is the structural drawing of giant magnetic resistor speed measuring sensor of the present invention.
Fig. 2 is the working state figure of giant magnetic resistor speed measuring sensor of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As shown in Figure 1; a kind of giant magnetic resistor speed measuring sensor a; comprise a hollow shell 1; be provided with a signal processing circuit board 2 and one and the sensitive element 3 that electrically connects of one end in the described hollow shell 1; be provided with high temperature magnet 4 between described signal processing circuit board 2 and the described sensitive element 3; described signal processing circuit board 2 other ends connect a cable 5; described cable 5 also connects an inserting terminal 6k; hollow shell 1 inner encapsulated epoxy resin glue 7; hollow shell 1 is provided with protection copper lid 8 near sensitive element 3 one ends; the other end is provided with back over cap 9, and described sensitive element 3 is the giant magnetoresistance chip, and the material of described hollow shell 1 is the magnetic conduction ferrous materials.
As shown in Figure 2, the principle of work of giant magnetic resistor speed measuring sensor a of the present invention is for utilizing the giant magnetoresistance element, detection is carried out exporting to automobile instrument after the signal Processing through signal processing circuit board 2 because of gear b rotates the variation of the magnetic field of magnets that causes, the field signal that will change is converted into faint voltage change signal.Because the changes of magnetic field that the tooth of gear causes during through sensor with groove is different, so sensor can accurately detect the number of teeth or the groove number of gear, thus the detection of realization speed.
Claims (5)
1. giant magnetic resistor speed measuring sensor, it is characterized in that: comprise a hollow shell, be provided with a signal processing circuit board and one and the sensitive element that electrically connects of one end in the described hollow shell, be provided with high temperature magnet between described signal processing circuit board and the described sensitive element, the described signal processing circuit board other end connects a cable, and described cable also connects an inserting terminal.
2. giant magnetic resistor speed measuring sensor according to claim 1 is characterized in that: the inner encapsulated epoxy resin glue of described hollow shell.
3. giant magnetic resistor speed measuring sensor according to claim 1 is characterized in that: described hollow shell is provided with protection copper lid near sensitive element one end, and the other end is provided with the back over cap.
4. giant magnetic resistor speed measuring sensor according to claim 1 is characterized in that: described sensitive element is the giant magnetoresistance chip.
5. giant magnetic resistor speed measuring sensor according to claim 1 is characterized in that: the material of described hollow shell is the magnetic conduction ferrous materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010161711A CN101858923A (en) | 2010-05-04 | 2010-05-04 | Giant magnetic resistor speed measuring sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010161711A CN101858923A (en) | 2010-05-04 | 2010-05-04 | Giant magnetic resistor speed measuring sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101858923A true CN101858923A (en) | 2010-10-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010161711A Pending CN101858923A (en) | 2010-05-04 | 2010-05-04 | Giant magnetic resistor speed measuring sensor |
Country Status (1)
| Country | Link |
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| CN (1) | CN101858923A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020311A (en) * | 2014-06-17 | 2014-09-03 | 上海德意达电子电器设备有限公司 | High-temperature-resistant traction motor rotation speed sensor |
| CN106841659A (en) * | 2016-11-21 | 2017-06-13 | 江苏大学 | A kind of foreign cotton fiber check and measure rejecting machine cotton flow passage speed-measuring method and device |
| CN109870589A (en) * | 2019-04-04 | 2019-06-11 | 哈尔滨恒达交通设备技术开发有限公司 | A kind of velocity sensor |
| CN111141321A (en) * | 2020-01-16 | 2020-05-12 | 苏州蓝石新动力有限公司 | Performance detection rack of giant magnetoresistance GMR magnetic encoder for permanent magnet synchronous motor |
-
2010
- 2010-05-04 CN CN201010161711A patent/CN101858923A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104020311A (en) * | 2014-06-17 | 2014-09-03 | 上海德意达电子电器设备有限公司 | High-temperature-resistant traction motor rotation speed sensor |
| CN106841659A (en) * | 2016-11-21 | 2017-06-13 | 江苏大学 | A kind of foreign cotton fiber check and measure rejecting machine cotton flow passage speed-measuring method and device |
| CN106841659B (en) * | 2016-11-21 | 2020-06-09 | 江苏大学 | Cotton flow channel speed measuring method and device for cotton foreign fiber detecting and removing machine |
| CN109870589A (en) * | 2019-04-04 | 2019-06-11 | 哈尔滨恒达交通设备技术开发有限公司 | A kind of velocity sensor |
| CN111141321A (en) * | 2020-01-16 | 2020-05-12 | 苏州蓝石新动力有限公司 | Performance detection rack of giant magnetoresistance GMR magnetic encoder for permanent magnet synchronous motor |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20101013 |