CN203616336U - Differential gear rotating-speed sensor - Google Patents
Differential gear rotating-speed sensor Download PDFInfo
- Publication number
- CN203616336U CN203616336U CN201320794337.5U CN201320794337U CN203616336U CN 203616336 U CN203616336 U CN 203616336U CN 201320794337 U CN201320794337 U CN 201320794337U CN 203616336 U CN203616336 U CN 203616336U
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- China
- Prior art keywords
- differential
- unit
- printed board
- hall circuit
- sensing
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- Expired - Lifetime
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- 238000003466 welding Methods 0.000 claims abstract description 4
- 150000001875 compounds Chemical class 0.000 claims description 3
- 238000002788 crimping Methods 0.000 claims description 3
- 238000004382 potting Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005307 ferromagnetism Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a differential gear rotating-speed sensor which comprises a sensing unit, a housing wrapping the sensing unit and a socket connected with the housing. The sensing unit comprises a differential Hall circuit, a permanent magnet, a printed board unit and a sensing support, wherein the permanent magnet is clung to the back side of the differential Hall circuit, the sensing support is provided with the printed board unit, the differential Hall circuit is welded to the printed board unit, and the printed board unit is electrically connected with a pin by welding. The differential gear rotating-speed sensor uses the differential Hall circuit to provide a bias work magnetic field suitable for the differential Hall circuit, and uses an integrated sensing unit structure to improve the applicability to severe environments of the sensor; and the sensor can reliably work in large air gaps, can be processed and debugged in a batch, and is high in efficiency and wide in applicability.
Description
Technical field
The utility model relates to a kind of gear speed sensor, is specifically related to a kind of differential type gear speed sensor.
Background technology
Gear speed sensor, is applied to the rotational speed and the position of rotation that detect ferromagnetism gear.Conventional have magneto-electric gear speed sensor and a hall effect type gear speed sensor, is widely used in fields such as anti-lock braking system, transmission, bent axles.
In the stronger occasion of the larger occasion of variation of ambient temperature scope and environmental interference magnetic field, the output of gear speed sensor is subject to the interference of environment, reliability decrease.
Utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of and improves the reliability of gear speed sensor under rugged surroundings and a kind of differential type gear speed sensor of reliably working under air gaps.
Technical scheme: for solving the problems of the technologies described above, a kind of differential type gear velocity sensor of the present utility model, comprise the shell and the socket being connected with shell of sensing unit, parcel sensing unit, described sensing unit comprises differential Hall circuit, permanent magnet, printed board unit and sensing support, described permanent magnet is close to the back side of differential Hall circuit, sensing support is provided with printed board unit, differential Hall circuit is welded on printed board unit, and printed board unit and pin are electrically connected by welding.
As preferably, described shell and socket, by sensing unit is inserted in shell, fix then crimping socket with potting compound.
The utility model provides a kind of differential type gear speed sensor, differential Hall circuit is made up of two Hall unit, differential amplifier, waveform discriminator circuit etc., and described Hall unit, differential amplifier and waveform discriminator circuit are integrated on a block semiconductor chip.This differential Hall circuit replaces by the differential values in measurement magnetic field, two Hall unit the absolute value of measuring magnetic field, this means two coefficient disturbing factors in Hall unit, for example temperature drift, manufacturing tolerance, magnetic field environment factor are minimized the impact of output, further reducing of these disturbing factors, be by the Hi-pass filter with external capacitor, the dynamic discriminating of differential field signal to be realized, greatly improved the reliability of gear speed sensor under rugged surroundings.
Differential type gear speed sensor of the present utility model; provide appropriate offset operation magnetic field by permanent magnet for differential Hall circuit; experience various difform ferromagnetism gears; between tooth and groove, the normal work of Hall circuit should be guaranteed in the differential magnetic field of minimum just, thereby can be at reliably working under air gaps.
Differential type gear speed sensor of the present utility model, embeds the sensing support of pin by Shooting Technique, the supporting body of printed board unit, Hall circuit, permanent magnet is provided.Printed board unit is arranged on sensing support, and Hall circuit and pin are welded on the pad of printed board unit, realizes electrical connection.Hall circuit is fixed in the circuit chamber of sensing support, and permanent magnet is close to the back side of Hall circuit, for Hall circuit provides offset operation magnetic field.The assembly of having realized above-mentioned assembling, is referred to as sensing unit.
Beneficial effect: differential type gear speed sensor of the present utility model, by adopting differential Hall circuit, provide differential Hall circuit appropriate offset operation magnetic field, adopt integrated sensing cellular construction, improve the ability of differential type gear speed sensor adaptation rugged surroundings, can be at reliably working under air gaps, be convenient to batch machining debugging, there is the advantages such as high-level efficiency applicability is extensive.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the sensing unit structural representation in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As depicted in figs. 1 and 2, a kind of differential type gear velocity sensor, comprise sensing unit 300, shell 20 and socket 10, described sensing unit 300 comprises differential Hall circuit 32, permanent magnet 33, printed board unit 34 and sensing support 30, described permanent magnet 33 belows are provided with differential Hall circuit 32, sensing support 30 is provided with printed board unit 34, differential Hall circuit 32 is connected with printed board unit 34, printed board unit 34 is electrically connected by welding with pin 31, the outer shell 20 that is provided with of sensing unit 300, shell 20 is connected with socket 10, sensing unit 300 is inserted in shell 20, fix with potting compound, then crimping socket 10.
In the present embodiment, differential Hall circuit 32 comprises two Hall unit, differential amplifier and waveform discriminator circuit, is integrated on a block semiconductor chip.This differential Hall circuit 32 replaces by the differential values in measurement magnetic field, two Hall unit the absolute value of measuring magnetic field, this means two coefficient disturbing factors in Hall unit, for example temperature drift, manufacturing tolerance, magnetic field environment factor are minimized the impact of output, further reducing of these disturbing factors, be by the Hi-pass filter with external capacitor, the dynamic discriminating of differential field signal to be realized, greatly improved the reliability of gear speed sensor under rugged surroundings.
The above is only preferred implementation of the present utility model; be noted that for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (3)
1. a differential type gear velocity sensor, it is characterized in that: comprise sensing unit (300), the shell (20) and the socket (10) being connected with shell of parcel sensing unit (300), described sensing unit (300) comprises differential Hall circuit (32), permanent magnet (33), printed board unit (34) and sensing support (30), described permanent magnet (33) is close to the back side of differential Hall circuit (32), sensing support (30) is provided with printed board unit (34), differential Hall circuit (32) is welded on printed board unit (34), printed board unit (34) is electrically connected by welding with pin (31).
2. differential type gear velocity sensor according to claim 1, is characterized in that: described sensing unit (300) inserts in shell (20), fixes then crimping socket (10) with potting compound.
3. differential type gear velocity sensor according to claim 1, it is characterized in that: described differential Hall circuit (32) comprises two Hall unit, differential amplifier and waveform discriminator circuit, described Hall unit, differential amplifier and waveform discriminator circuit are integrated on a block semiconductor chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320794337.5U CN203616336U (en) | 2013-12-04 | 2013-12-04 | Differential gear rotating-speed sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320794337.5U CN203616336U (en) | 2013-12-04 | 2013-12-04 | Differential gear rotating-speed sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203616336U true CN203616336U (en) | 2014-05-28 |
Family
ID=50768968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320794337.5U Expired - Lifetime CN203616336U (en) | 2013-12-04 | 2013-12-04 | Differential gear rotating-speed sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203616336U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849486A (en) * | 2014-11-24 | 2015-08-19 | 重庆斯凯力科技有限公司 | Rotating speed sensor |
-
2013
- 2013-12-04 CN CN201320794337.5U patent/CN203616336U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849486A (en) * | 2014-11-24 | 2015-08-19 | 重庆斯凯力科技有限公司 | Rotating speed 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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140528 |