CN219084969U - Speed detection device and moped - Google Patents
Speed detection device and moped Download PDFInfo
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- CN219084969U CN219084969U CN202320016814.9U CN202320016814U CN219084969U CN 219084969 U CN219084969 U CN 219084969U CN 202320016814 U CN202320016814 U CN 202320016814U CN 219084969 U CN219084969 U CN 219084969U
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Abstract
The utility model relates to the technical field of speed detection, and provides a speed detection device and a moped, wherein the speed detection device comprises: a controller; the magnetic conduction piece is provided with an induction part; the magnetic resistance sensor comprises a magnetic resistance element, a magnetic core and a circuit board, wherein the magnetic resistance element is electrically connected to the circuit board, the magnetic core is arranged on the circuit board, and the circuit board is in communication connection with the controller. Through setting up induction part on magnetic conduction spare, set up magnetoresistive element and magnetic core simultaneously on the circuit board, in-process at rotary motion when magnetic conduction spare, induction part can cut the magnetic induction line of magnetic core for the magnetic field of magnetic core changes, and the magnetic flux between the induction part of magnetic core and magnetic conduction spare also changes, and the magnetic flux variable quantity can be induced to the magnetoresistive element, then converts the magnetic signal into the electrical signal and carries the electrical signal to the controller through the circuit board, and the controller can obtain the rotational speed of magnetic conduction spare from this according to the electrical signal.
Description
Technical Field
The utility model relates to the technical field of speed detection, in particular to a speed detection device and a moped.
Background
The pedal frequency sensor is widely applied to the power-assisted bicycle and is used for collecting pedal frequency of a user and transmitting the pedal frequency to the control system, and the control system controls output power of the motor according to the pedal frequency of the user so that the user can ride conveniently and smoothly in the riding process.
The prior art discloses a step on frequency sensor, see fig. 12 and 13, it includes the frame and helps to step on measuring mechanism, wherein, is equipped with driving shaft, driven shaft, flywheel and transmission fluted disc on the frame, and the flywheel passes through the driving medium and is connected with the transmission fluted disc, and this transmission fluted disc is connected with the driving shaft, sets up this and helps to step on measuring mechanism on the flywheel, and this helps to step on measuring mechanism and contains structure casing, speed sensor shell, magnet, induction circuit board, inductor fixed slot and two hall element.
When the sprocket on the flywheel passes through the Hall element and the magnet, the magnetic field change is caused, the rotation speed of the sprocket is obtained through the measurement of the potential, a pulse signal is output through one sprocket, the flywheel is connected with the driving shaft through the transmission part, the transmission fluted disc and the driving shaft due to the fact that the pedals are fixedly connected, and the whole vehicle rotation speed or the pedal pedaling-assisting rotation speed during pedaling-assisting is judged through the number of the sprockets passing through the Hall element.
The structure of the pedal frequency sensor in the prior art is more complicated, when the flywheel is assembled, the pedal frequency sensor is required to be arranged on one side of the flywheel of the frame, the flywheel is sleeved and installed together due to the fact that a plurality of flywheel discs are required to be sleeved and installed together, the installation step is complicated, if the pedal frequency sensor is additionally arranged beside the flywheel, the pedal frequency sensor is required to be arranged according to different types of flywheel due to the fact that the number of the flywheel is more, and therefore the pedal frequency sensor cannot be popularized and used, and the difficulty of subsequent maintenance is increased.
Disclosure of Invention
Therefore, the technical problem to be solved by the utility model is to overcome the defects that the structure of the pedal frequency sensor in the prior art is complex, the pedal frequency sensor needs to be arranged at one side of the flywheel of the frame when the flywheel is assembled, the mounting steps are complicated because a plurality of flywheel discs need to be sleeved together, and the pedal frequency sensor needs to be arranged at the side of the flywheel according to different types because the number of the flywheel is more, so that the pedal frequency sensor cannot be popularized and used, and the difficulty of subsequent maintenance is increased.
A speed detection apparatus comprising: a controller; the magnetic conduction piece is provided with at least two induction parts along the peripheral surface; the magnetic resistance sensor comprises a magnetic resistance element, a magnetic core and a circuit board, wherein the magnetic resistance element is electrically connected to the circuit board, the magnetic core is arranged on one side surface of the circuit board opposite to the magnetic resistance element, and the circuit board is in communication connection with the controller; the magnetic conduction piece is driven by external force to rotate, so that all the induction parts are suitable for cutting magnetic induction wires of the magnetic cores, and the magnetic resistance element converts magnetic signals into electric signals, so that the controller is suitable for receiving the electric signals transmitted from the circuit board.
Optionally, in the speed detecting device, a positioning hole is formed in the circuit board at a position corresponding to the magnetoresistive element, and the magnetic core is installed in the positioning hole.
Optionally, in the above speed detecting device, in a process of rotating the magnetic conductive member, when any one of the sensing portions passes through the magnetoresistive element, the sensing portion, the magnetoresistive element and the magnetic core are located on a same straight line.
Optionally, in the speed detecting device, the magnetoresistive element is disposed at an end of any one of the sensing portions or a side surface of the sensing portion on the magnetic conductive member.
Optionally, in the speed detecting device, all the sensing portions are asymmetrically disposed on the peripheral surface of the magnetic conductive member.
Optionally, in the above speed detecting device, the magnetic conductive member includes a plurality of sensing portions disposed at intervals, and two intervals between any three adjacent sensing portions are different.
Optionally, in the speed detecting device, the radial areas of any two adjacent sensing portions are not equal.
Optionally, in the above speed detecting device, the magnetic conductive member includes a first sensing portion, a second sensing portion, and a third sensing portion that are sequentially disposed, and the third sensing portion is disposed between the first sensing portion and the second sensing portion; the end of the first sensing part is arranged in a plane, the end of the second sensing part is arranged in a tip, and the end of the third sensing part is arranged in an arc surface.
Optionally, in the speed detecting device, the magnetic conductive member has a plurality of continuously arranged saw teeth, and the saw teeth are used as the sensing portion and have tips.
Optionally, in the speed detecting device, the tooth grooves of the saw teeth are plane or arc surfaces.
Optionally, in the speed detecting device, the magnetoresistive element is a linear hall element; and/or the controller is an MCU controller.
A power assisted vehicle comprising: a speed detection device, which is the speed detection device described above; and the speed detection device is arranged on the frame.
Optionally, in the above-mentioned moped, the moped is an electric moped, the frame has a five-way center shaft, the magnetic conductive member is adapted to be sleeved on the five-way center shaft, and the five-way center shaft is adapted to drive the magnetic conductive member to rotate.
The technical scheme of the utility model has the following advantages:
1. the utility model provides a speed detection device, comprising: a controller; the magnetic conduction piece is provided with at least two induction parts along the peripheral surface; the magnetic resistance sensor comprises a magnetic resistance element, a magnetic core and a circuit board, wherein the magnetic resistance element is electrically connected to the circuit board, the magnetic core is arranged on one side surface of the circuit board opposite to the magnetic resistance element, and the circuit is in communication connection with the controller; the magnetic conduction piece is driven by external force to rotate, so that all the induction parts are suitable for cutting magnetic induction wires of the magnetic cores, and the magnetic resistance element converts magnetic signals into electric signals, so that the controller is suitable for receiving the electric signals transmitted from the circuit board.
The speed detection device of this structure is through setting up induction part on magnetic conduction spare, set up the magneto-resistance component on the circuit board simultaneously, and set up the magnetic core on the circuit board with this magneto-resistance component in opposite directions, in-process at rotary motion when magnetic conduction spare, induction part can cut the magnetic induction line of magnetic core, make the magnetic field of magnetic core change, also the magnetic flux between the induction part of magnetic core and magnetic conduction spare changes promptly, the magneto-resistance component can sense the magnetic flux variation, then turn into the signal of telecommunication with the magnetic signal and carry the signal of telecommunication to the controller through the circuit board, the rotation rate of magnetic conduction spare can be obtained according to the signal of telecommunication by the controller from this, this speed detection device simple structure, the maintenance of being convenient for, and install swiftly conveniently, can detect the speed, the structure of having overcome the frequency sensor of stepping among the prior art is more complicated, when using, need set up this frequency sensor of stepping on one side of the flywheel of frame, when assembling, because need establish a plurality of flywheel disk cover and install together, the installation step comparatively sets up a frequency sensor on one side, if the side, the frequency sensor of stepping on more, the frequency sensor can be increased according to the different models of the flywheel, the frequency sensor that need be arranged, the model of the subsequent frequency sensor has been used to have increased.
2. In the speed detection device provided by the utility model, in the process of rotating movement of the magnetic conduction piece, when any one of the induction parts passes through the magnetic resistance element, the induction part, the magnetic resistance element and the magnetic core are positioned on the same straight line. The three are positioned on the same straight line, so that the stability of signal transmission can be ensured.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an overall structure of a magnetoresistive element disposed on a magnetic conductive element of a speed detecting device according to a first embodiment of the present utility model;
FIG. 2 is another angular schematic view of the speed detecting device shown in FIG. 1;
FIG. 3 is a front view of the speed detecting device shown in FIG. 1;
FIG. 4 is a side view of the speed sensing device of FIG. 1;
FIG. 5 is a schematic illustration of a magnetic core cut from a magnetically permeable member;
FIG. 6 is a schematic view of the end of the magnetic conductive member in a planar configuration;
FIG. 7 is a schematic view of the end of the magnetic conductive member being pointed and the tooth slot being planar;
FIG. 8 is a schematic diagram of the structure of the magnetic conductive member when the end is pointed and the tooth slot is curved;
fig. 9 is a schematic structural diagram of the induction part on the magnetic conductive member with unequal radial areas;
FIG. 10 is a schematic diagram of the induction part of the magnetic conductive member in three different shapes;
FIG. 11 is a schematic view showing a position structure of a magnetoresistive element when the magnetoresistive element is disposed at an end portion of the sensing portion;
FIG. 12 is a schematic diagram of a prior art booster measuring mechanism and flywheel position configuration;
FIG. 13 is a schematic diagram of a prior art power assist measurement mechanism;
reference numerals illustrate:
1. a controller; 2. a magnetic conductive member; 201. an induction unit; 3. a magnetoresistive element; 4. a magnetic core; 5. a circuit board; 501. and positioning holes.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.
Example 1
The present embodiment describes a speed detecting device for detecting the speed of a scooter, see fig. 1-11, the speed detecting device includes a magnetic conductive member 2, a magnetoresistive sensor and a controller 1, wherein at least two sensing portions 201 are disposed on the peripheral surface of the magnetic conductive member 2, the magnetoresistive sensor includes a magnetoresistive element 3, a magnetic core 4 and a circuit board 5, wherein the magnetoresistive element 3 and the magnetic core 4 are disposed on the circuit board 5, the magnetoresistive element 3 is electrically connected with the circuit board 5, the magnetic core 4 is disposed on a side surface of the circuit board 5 opposite to the magnetoresistive element 3, and the controller 1 is in communication connection with the circuit board 5.
When the magnetic conductive member 2 is driven by an external force, it can perform a rotational motion, in the process of the rotational motion, all the sensing portions 201 are suitable for cutting the magnetic induction lines of the magnetic core 4, after the magnetic resistance element 3 senses the change of the magnetic flux, the magnetic signal can be converted into an electrical signal, and the electrical signal is transmitted to the controller 1 through the circuit board 5, so that the controller 1 is suitable for receiving the electrical signal transmitted from the circuit board 5.
Through setting up induction part 201 on magnetic conduction spare 2, set up magnetoresistive element 3 simultaneously on circuit board 5, and set up magnetic core 4 on circuit board 5 in opposite directions this magnetoresistive element 3, in-process at rotary motion when magnetic conduction spare 2, induction part 201 can cut the magnetic induction line of magnetic core 4, make the magnetic field of magnetic core 4 change, that is, the magnetic flux between the induction part 201 of magnetic core 4 and magnetic conduction spare 2 changes, the magnetic flux variable quantity can be sensed to magnetoresistive element 3, then convert the magnetic signal into the electrical signal and carry for controller 1 through circuit board 5, controller 1 can obtain the rotation rate of magnetic conduction spare 2 from this according to the electrical signal, this speed detection device simple structure, the maintenance of being convenient for, and install swiftly and conveniently, set up it on the frame, can detect the speed promptly.
When the magnetic conduction piece 2 rotates, the magnetic cores 4 which are oppositely arranged on the magnetic resistance element 3 generate magnetic field change, then the magnetic resistance element 3 induces magnetic flux, and magnetic signals are converted into electric signals to be transmitted to the circuit board 5 to be transmitted to the controller 1 for calculation to obtain signal pulses.
In this embodiment, a positioning hole 501 may be formed on the circuit board 5 corresponding to the position of the magnetoresistive element 3, the magnetic core 4 is mounted in the positioning hole 501, and the positioning hole 501 may be formed on the back surface of the circuit board 5 corresponding to the sensing point of the magnetoresistive element 3.
In the process of the rotating motion of the magnetic conductive member 2, when any one of the sensing portions 201 passes through the magnetoresistive element 3, the corresponding sensing portion 201, the magnetoresistive element 3 and the magnetic core 4 are positioned on the same straight line, and the three are positioned on the same straight line, so that the stability of signal transmission can be ensured.
In the present embodiment, the magnetoresistive element 3 may be provided at an end of any one of the sensing portions 201 of the magnetic conductive material 2, and may be provided on a side surface of the sensing portion 201.
Wherein, when being arranged at the end, the magneto-resistance element 3 senses the signal of the end of the sensing part 201 of the magnetic conduction member 2, and when being arranged at the side, the magneto-resistance element 3 senses the signal of the side of the sensing part 201 of the magnetic conduction member 2.
In this embodiment, in order to make the induction lines cut by the induction part 201 different in amount, the induction part 201 of the magnetic conductive member 2 may be asymmetrically disposed on the circumferential surface of the magnetic conductive member 2.
In terms of development, the magnetic conductive member 2 includes a plurality of sensing portions 201 disposed at intervals, and two intervals between any three adjacent sensing portions 201 are not equal, and radial areas of any two adjacent sensing portions 201 are not equal, so that an effect of detecting a rotation direction of the magnetic conductive member can be achieved.
In a specific application, the magnetic conductive member 2 may include a plurality of first sensing portions 201, second sensing portions 201, and third sensing portions 201 that are sequentially disposed, where the third sensing portions 201 are disposed between the first sensing portions 201 and the second sensing portions 201; the end of the first sensing part 201 is arranged in a plane, the end of the second sensing part 201 is arranged in a tip, and the end of the third sensing part 201 is arranged in an arc surface.
Of course, the magnetic conductive member 2 may be provided with a plurality of continuously provided serrations, each of which is a sensing portion 201 having a tip, and the tooth slot of each serration may be formed in a plane or a cambered surface when the present configuration is performed.
In this embodiment, the magnetoresistive element 3 may be a linear hall element, and the controller 1 may be an MCU controller.
When the magnetic conduction member 2 is specifically arranged, the magnetic conduction member 2 can be divided into a front side and a back side, when the back side faces the magnetic core 4, the signal transmitted to the controller 1 by the magnetoresistive element 3 gives out an electric signal after passing through the controller 1, and when the magnetic conduction member rotates in the forward direction, no electric signal is generated.
Example 2:
the present embodiment describes a booster vehicle including a speed detection device and a frame, wherein the speed detection device is the speed detection device described in embodiment 1, and the speed detection device is provided on the frame.
The moped in this embodiment may be configured as an electric moped, where the frame has a five-way center shaft, the magnetic conductive member 2 is adapted to be sleeved on the five-way center shaft, and the five-way center shaft is adapted to drive the magnetic conductive member 2 to rotate, and the circuit board 5 of the magnetoresistive sensor is adapted to be mounted below the five-way center shaft, and the specific position is set according to the actual use and the radial area of the magnetic conductive member 2.
In the process that the center shaft is subjected to the driving force rotation motion, the magnetic conduction piece 2 can be driven to rotate, and then the induction part 201 on the magnetic conduction piece 2 can cut the magnetic induction line of the magnetic core 4.
The moped in this embodiment further includes a center motor, which is disposed on the frame, and a speed detecting device is disposed in the center motor, so as to detect forward rotation and reverse rotation of the center motor.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.
Claims (13)
1. A speed detecting device, comprising:
a controller (1);
a magnetic conductive member (2) provided with at least two induction sections (201) along the peripheral surface thereof;
the magnetic resistance sensor comprises a magnetic resistance element (3), a magnetic core (4) and a circuit board (5), wherein the magnetic resistance element (3) is electrically connected to the circuit board (5), the magnetic core (4) is arranged on one side surface of the circuit board (5) opposite to the magnetic resistance element (3), and the circuit board (5) is in communication connection with the controller (1); the magnetic conduction piece (2) is driven by external force to rotate, so that all the induction parts (201) are suitable for cutting magnetic induction lines of the magnetic cores (4), and the magnetic resistance element (3) converts magnetic signals into electric signals, so that the controller (1) is suitable for receiving the electric signals transmitted by the circuit board (5).
2. A speed detecting device according to claim 1, characterized in that a positioning hole (501) is provided in the circuit board (5) at a position corresponding to the magnetoresistive element (3), and the magnetic core (4) is mounted in the positioning hole (501).
3. A speed detecting device according to claim 2, characterized in that during the rotational movement of the magnetically permeable member (2), the sensing portion (201) and the magnetoresistive element (3) and the magnetic core (4) are positioned on the same line when any of the sensing portions (201) passes the magnetoresistive element (3).
4. A speed detecting device according to any one of claims 1-3, wherein the magnetoresistive element (3) is arranged at an end of any one of the sensing portions (201) or at a side of the sensing portion (201) on the magnetically permeable member (2).
5. The speed detecting device according to claim 4, wherein all the sensing portions (201) are asymmetrically arranged on the peripheral surface of the magnetic conductive member (2).
6. The speed detecting device according to claim 4, wherein the magnetic conductive member (2) includes a plurality of sensing portions (201) arranged at intervals, and two spaces between any three adjacent sensing portions (201) are different.
7. A speed detecting device according to claim 6, wherein the radial areas of any two adjacent sensing portions (201) are not equal.
8. The speed detection device according to claim 7, wherein the magnetically permeable member (2) includes a first sensing portion (201), a second sensing portion (201), and a third sensing portion (201) disposed in this order, the third sensing portion (201) being disposed between the first sensing portion (201) and the second sensing portion (201);
the end part of the first induction part (201) is arranged in a plane, the end part of the second induction part (201) is arranged in a tip end, and the end part of the third induction part (201) is arranged in an arc surface.
9. A speed detecting device according to claim 1, characterized in that the magnetically permeable member (2) has a plurality of continuously arranged serrations as the sensing portion (201) having a tip.
10. The speed detecting apparatus according to claim 9, wherein the tooth grooves of the serrations are flat or curved.
11. A speed detection device according to claim 1, characterized in that the magnetoresistive element (3) is a linear hall element; and/or, the controller (1) is an MCU controller (1).
12. A power assisted vehicle, comprising:
speed detection means according to any one of claims 1-11;
and the speed detection device is arranged on the frame.
13. The moped according to claim 12, wherein the moped is an electric moped, the frame has a five-way center shaft, the magnetic conductive member (2) is adapted to be sleeved on the five-way center shaft, and the five-way center shaft is adapted to drive the magnetic conductive member (2) to rotate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320016814.9U CN219084969U (en) | 2023-01-04 | 2023-01-04 | Speed detection device and moped |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320016814.9U CN219084969U (en) | 2023-01-04 | 2023-01-04 | Speed detection device and moped |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219084969U true CN219084969U (en) | 2023-05-26 |
Family
ID=86404381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320016814.9U Active CN219084969U (en) | 2023-01-04 | 2023-01-04 | Speed detection device and moped |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219084969U (en) |
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2023
- 2023-01-04 CN CN202320016814.9U patent/CN219084969U/en active Active
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