CN203116693U - Hall type angle sensor with stable structure - Google Patents
Hall type angle sensor with stable structure Download PDFInfo
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- CN203116693U CN203116693U CN 201320011653 CN201320011653U CN203116693U CN 203116693 U CN203116693 U CN 203116693U CN 201320011653 CN201320011653 CN 201320011653 CN 201320011653 U CN201320011653 U CN 201320011653U CN 203116693 U CN203116693 U CN 203116693U
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- rotating shaft
- angular transducer
- magnet
- hall
- hole
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Abstract
The utility model discloses a Hall type angle sensor with a stable structure, which comprises a magnet and a PCB (printed circuit board) provided with a Hall element. The Hall type angle sensor is characterized in that the angle sensor further comprises a rotating shaft, and the center of the upper end face of the rotating shaft is provided with a boss; the boss is provided with a blind hole coinciding with the axis of the rotating shaft; the magnet is fixed at the bottom part of the blind hole; the boss can rotatably press against the PCB; and the Hall element is accommodated in the blind hole, and a gap is reserved between the Hall element and the side wall of the blind hole. The Hall type angle sensor can enable the magnet and the Hall element to keep an effective working distance when the tested rotating shaft moves in the axial direction, thereby ensuring the intensity of a magnetic field imposed on the Hall element by the magnet to be stable, and enabling the output linearity of the sensor to be high. Therefore, the Hall type angle sensor disclosed by the utility model has the characteristics of stable and compact structure, strong anti-interference for a working environment, high working stability and reliability, and rotating angle measurement.
Description
Technical field
The utility model relates to a kind of Hall-type angular transducer, specifically a kind of constitutionally stable Hall-type angular transducer.
Background technology
The Hall-type angular transducer is widely used in changing in order to the angle of responding to gas pedal, brake pedal, clutch pedal etc. in the industries such as automobile making, the control of industry mechanical arm camber, the manufacturing of space flight navigation equipment.The Hall-type angular transducer mainly by the family curve linearity of tested turn rotational angle theta and Hall-type angular transducer output voltage U, is evaluated hereinafter to be referred as the output linearity the degree of reliability and the degree of stability of rotational angle induction.
As shown in Figure 1, the Hall-type angular transducer of the prior art DSP that comprises magnet, Hall element, A/D change-over circuit and be used for revising the sensor output signal linearity amplifies and compensating circuit; Wherein, magnet is fixedly mounted on the end of tested rotating shaft so that their synchronous rotations, Hall element be installed in magnet under the position, and when magnet rotates and Hall element remain contactless state, when tested rotating shaft and magnet turn over an angle θ synchronously, the rotation in Hall element induced magnet magnetic field changes the corresponding electric signal of output, this electric signal export a higher analog voltage signal U of the linearity that reflects tested shaft rotary corner θ through A/D change-over circuit with after DSP amplifies and compensating circuit makes temperature drift compensation etc. and handle.
There is following shortcoming in above-mentioned Hall-type angular transducer:
The first, because magnet separates with Hall element, need when Hall element is installed, carry out the position with magnet and match, guarantee that magnet is applied to the magnetic field intensity appropriateness on the Hall element, so that the Hall element operate as normal, therefore, existing Hall-type angular transducer installation difficulty is big;
Second, because tested rotating shaft easily moves axially because the operating mode of complexity produces, the position that is fixed on the magnet in the tested rotating shaft is respective change also, and the interval between Hall element and the magnet is generally smaller, the magnetic field intensity that the slighter movement of tested rotating shaft can cause magnet to be applied on the Hall element produces bigger variation, make when magnet rotates repeatedly, the distribution repeatability that is applied to the magnetic field intensity on the Hall element is inconsistent, the family curve of Hall-type angular transducer is inconsistent when making each the rotation, the reliability of Hall-type angular transducer is reduced, what is more, when magnet puts on that magnetic field intensity on the Hall element is crossed by force or excessively, and exceed that DSP amplifies and during the upper lower limit value of compensating circuit, make DSP amplification and compensating circuit enter saturated or cut-off state, make the Hall-type angular transducer quit work, therefore, the output linearity of existing Hall-type angular transducer is relatively poor, and stability and reliability are low.
The utility model content
The purpose of this utility model provides a kind of linearity of output signal height, reliable, the constitutionally stable Hall-type angular transducer of working stability.
The purpose of this utility model is to realize by following technical measures:
A kind of constitutionally stable Hall-type angular transducer comprises magnet and the pcb board that is provided with Hall element, it is characterized in that described angular transducer also is included in the rotating shaft that upper surface central authorities are provided with boss; Described boss has the blind hole that overlaps with described shaft axis, and described magnet is fixed on described blind hole bottom, and described boss is conflicted turnably on pcb board, and described Hall element is contained in the blind hole and also and between the magnet leaves the gap.When rotating shaft moves axially to the pcb board direction, the boss of conflict on pcb board stops rotating shaft to be moved further, only need the degree of depth of appropriate design blind hole, can guarantee to be no more than the Design of Sensor higher limit in the magnetic field intensity that magnet in such cases puts on the Hall element, prevent that Hall element from entering state of saturation, magnetic field intensity stability is obtained to be ensured, has improved the output linearity of sensor.
As a kind of improvement of the present utility model, described angular transducer also comprises over cap; Described over cap is coated on the described magnet.
As a kind of improvement of the present utility model, the end face of described over cap is provided be used to the projection of guaranteeing the minimum effective working distance of magnet and Hall element.After angular transducer is through long-term the use; wearing and tearing appear rotating in the boss in the rotating shaft; magnet is gradually near Hall element; projection on the over cap is conflicted on Hall element; magnet and Hall element keep minimum effective working distance; to guarantee that the magnetic field intensity that magnet puts on the Hall element is no more than the Design of Sensor higher limit, make that obtained to prolong the serviceable life of angular transducer.
In order to share the stressed of rotating shaft boss, to the wearing and tearing of boss, prolong the serviceable life of sensor when reducing the rotating shaft rotation, as a kind of improvement of the present utility model, be provided with packing ring between described rotating shaft and the pcb board.
In order to make the more compact structure of sensor, as preferred implementation of the present utility model, described blind hole is the shoulder hole with one-level step, and this shoulder hole is made up of two concentric different diameter holes, described magnet is cylinder-shaped magnet, and this cylinder-shaped magnet is inlaid in the following hole of described shoulder hole.
For make magnet can setting-in to the blind hole bottom, avoid magnet to be squeezed by compressed air in the blind hole and magnet installed produce the location worker poor, as a kind of improvement of the present utility model, be provided be used to the fluting that holds air bottom the following hole of described blind hole.
As a kind of embodiment of the present utility model, described boss has the mounting groove around hole under the described blind hole, and described over cap is inlaid in this mounting groove.
For more reliable resetting after the auxiliary rotating shaft rotation, and keep the angular transducer compact conformation, as a kind of improvement of the present utility model, described angular transducer also comprises back-moving spring; Described boss has ring groove, and described back-moving spring is installed in this ring groove.
In order further to improve the performance of sensor, as improvement of the present utility model, described angular transducer also comprises the shell that has through hole; The adaptive installation of described pcb board, packing ring and rotating shaft in the enclosure, described pcb board and packing ring are fixedly mounted in the shell, described rotating shaft is rotatably installed in the shell, the sidewall of described rotating shaft is provided with bulge loop and this bulge loop is conflicted at the lower wall surface of shell, and the bottom of described rotating shaft passes from described through hole.In rotating shaft when moving axially away from the pcb board direction, the bulge loop of conflict on shell stops rotating shaft to be moved further, guarantee to be not less than the Design of Sensor lower limit in the magnetic field intensity that magnet in such cases puts on the Hall element, prevent that Hall element from entering cut-off state, magnetic field intensity stability is obtained to be ensured, has further improved the output linearity of sensor.
As a kind of embodiment of the present utility model, the lower surface of described rotating shaft has for the mounting hole that connects mechanism to be tested.
Compared with prior art, the utlity model has following beneficial effect:
Hall-type angular transducer of the present utility model can be when tested rotating shaft moves axially; because the boss of conflict on pcb board; the over cap projection of conflict on Hall element stops rotating shaft to be moved to the pcb board direction; the bulge loop of conflict on shell stops rotating shaft to moving away from the pcb board direction; the operating distance that magnet and Hall element can be remained valid; guarantee that the magnetic field intensity that magnet is applied on the Hall element is stable; make the output linearity height of sensor; therefore, the utlity model has the Stability Analysis of Structures compactness; strong interference immunity to working environment; job stability and reliability height; the accurate characteristics of outer corner measurement.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments:
Fig. 1 is the theory diagram of Hall-type angular transducer;
Fig. 2 partly cuts open structural representation for the utility model Hall-type angular transducer.
Embodiment
As shown in Figure 2, Hall-type angular transducer of the present utility model comprises pcb board 1, Hall element 2, magnet 3, packing ring 4, rotating shaft 5, over cap 7, back-moving spring 8 and shell 6.Wherein, pcb board 1 is the wiring wiring board of Hall element 2; its leading-out terminal amplifies with A/D change-over circuit and DSP and compensating circuit is electrically connected, and Hall element 2 is mounted on the pcb board 1, and packing ring 4, rotating shaft 5, shell 6 and over cap 7 all adopt does not have the magnetic material injection mo(u)lding of stagnating.
In addition, boss 5a of the present utility model has the mounting groove 5f around hole under the blind hole 5b, the end face of over cap 7 is provided be used to guaranteeing magnet 3 and Hall element 2 minimum effective working distance projection 7a, over cap 7 is inlaid among this mounting groove 5f and is coated on the magnet 3, between over cap 7 and magnet 3, add a little binder, come off because of the long-time back magnet 3 that uses to prevent product; Boss 5a of the present utility model has ring groove 5g, and back-moving spring 8 is installed among this ring groove 5g.
During the rotational angle of the tested rotating shaft on using Hall-type angular transducer measured automobiles of the present utility model, the Hall-type angular transducer is installed on the car body, the mounting hole 5i of sensor rotating shaft 5 directly connects with tested rotating shaft, perhaps connect with tested rotating shaft by linkage assembly/gear mechanism, make sensor rotating shaft 5 and tested rotating shaft and rotate synchronously or by the corner of direct ratio, when tested rotating shaft moves axially, the operating distance that sensor of the present utility model still can make magnet 3 and Hall element 2 remain valid, preventing Hall element 2 occurs saturated or by phenomenon, guarantee that the magnetic field intensity that magnet 3 is applied on the Hall element 2 is stable, reach and improve the Hall-type angular transducer output linearity and improve its job stability, the purpose of reliability.
The utility model does not limit to and above-mentioned embodiment; according to foregoing; ordinary skill knowledge and customary means according to this area; do not breaking away under the above-mentioned basic fundamental thought of the utility model prerequisite; the utility model can also be made equivalent modifications, replacement or the change of other various ways, all drops among the protection domain of the present utility model.
Claims (10)
1. constitutionally stable Hall-type angular transducer comprises magnet (3) and is provided with the pcb board (1) of Hall element (2) that it is characterized in that: described angular transducer also is included in the rotating shaft (5) that upper surface (5d) central authorities are provided with boss (5a); Described boss (5a) has the blind hole (5b) with described rotating shaft (5) dead in line, described magnet (3) is fixed on described blind hole (5b) bottom, described boss (5a) is conflicted turnably on pcb board (1), described Hall element (2) be contained in the blind hole (5b) and and described magnet (3) between leave gap (5c).
2. constitutionally stable Hall-type angular transducer according to claim 1, it is characterized in that: described angular transducer also comprises over cap (7); Described over cap (7) is coated on the described magnet (3).
3. constitutionally stable Hall-type angular transducer according to claim 2 is characterized in that: the end face of described over cap (7) is provided be used to guaranteeing the projection (7a) of magnet (3) with the minimum effective working distance of Hall element (2).
4. constitutionally stable Hall-type angular transducer according to claim 3 is characterized in that: be provided with packing ring (4) between described rotating shaft (5) and the pcb board (1).
5. constitutionally stable Hall-type angular transducer according to claim 4, it is characterized in that: described blind hole (5b) is for having the shoulder hole of one-level step, this shoulder hole is made up of two concentric different diameter holes, described magnet (3) is cylinder-shaped magnet, and this cylinder-shaped magnet is inlaid in the following hole of described shoulder hole.
6. constitutionally stable Hall-type angular transducer according to claim 5 is characterized in that: be provided be used to the fluting that holds air (5e) bottom the following hole of described blind hole (5b).
7. constitutionally stable Hall-type angular transducer according to claim 6, it is characterized in that: described boss (5a) has the mounting groove (5f) around hole under the described blind hole (5b), and described over cap (7) is inlaid in this mounting groove (5f).
8. constitutionally stable Hall-type angular transducer according to claim 7, it is characterized in that: described angular transducer also comprises back-moving spring (8); Described boss (5a) has ring groove (5g), and described back-moving spring (8) is installed in this ring groove (5g).
9. according to each described constitutionally stable Hall-type angular transducer of claim 1 to 8, it is characterized in that: described angular transducer also comprises the shell (6) that has through hole (6a); Described pcb board (1), packing ring (4) and rotating shaft (5) are adaptive to be installed in the shell (6), described pcb board (1) and packing ring (4) are fixedly mounted in the shell (6), described rotating shaft (5) is rotatably installed in the shell (6), the sidewall of described rotating shaft (5) is provided with bulge loop (5h) and this bulge loop (5h) is conflicted at the lower wall surface of shell (6), and the bottom of described rotating shaft (5) passes from described through hole (6a).
10. constitutionally stable Hall-type angular transducer according to claim 9 is characterized in that: the lower surface of described rotating shaft (5) has for the mounting hole (5i) that connects mechanism to be tested.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320011653 CN203116693U (en) | 2013-01-09 | 2013-01-09 | Hall type angle sensor with stable structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320011653 CN203116693U (en) | 2013-01-09 | 2013-01-09 | Hall type angle sensor with stable structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203116693U true CN203116693U (en) | 2013-08-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320011653 Expired - Lifetime CN203116693U (en) | 2013-01-09 | 2013-01-09 | Hall type angle sensor with stable structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203116693U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075957A (en) * | 2013-01-09 | 2013-05-01 | 伍国伟 | Hall type angle transducer with stable structure |
| CN110344904A (en) * | 2019-07-02 | 2019-10-18 | 广西玉柴机器股份有限公司 | A kind of air valve bridge guide rod with gas storage hole |
-
2013
- 2013-01-09 CN CN 201320011653 patent/CN203116693U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075957A (en) * | 2013-01-09 | 2013-05-01 | 伍国伟 | Hall type angle transducer with stable structure |
| CN103075957B (en) * | 2013-01-09 | 2015-06-17 | 伍国伟 | Hall type angle transducer with stable structure |
| CN110344904A (en) * | 2019-07-02 | 2019-10-18 | 广西玉柴机器股份有限公司 | A kind of air valve bridge guide rod with gas storage hole |
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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: 20130807 |