阅读说明：本技术 一种角度测量传感器 (Angle measuring sensor ) 是由 任萌喆 邸剑涛 黄志高 朱卫 张全慧 于 2018-05-29 设计创作，主要内容包括：本发明涉及一种角度测量传感器,包括：壳体,驱动齿轮,第一齿轮,第二齿轮,PCB板以及上盖板,其中,所述第一齿轮中嵌有一第一转子,所述第二齿轮中嵌有一第二转子,所述第一转子及所述第二转子朝向所述PCB板,所述PCB板上对应所述第一转子及所述第二转子的位置上均设置有激励线圈及接收线圈。本发明的角度测量传感器,其所测量的绝对角度测量范围精度更高,范围更广,而且测量范围由转子扇叶数与齿轮齿数共同决定,从而可通过控制转子扇叶数或者齿轮齿数控制测量范围,其灵活度更大。(the invention relates to an angle measuring sensor, comprising: the PCB comprises a shell, a driving gear, a first gear, a second gear, a PCB and an upper cover plate, wherein a first rotor is embedded in the first gear, a second rotor is embedded in the second gear, the first rotor faces the PCB, and the PCB corresponds to the first rotor and the second rotor and is provided with an exciting coil and a receiving coil. The angle measuring sensor has the advantages that the measured absolute angle measuring range is higher in precision and wider in range, the measuring range is determined by the number of the rotor blades and the number of the gear teeth, the measuring range can be controlled by controlling the number of the rotor blades or the number of the gear teeth, and the flexibility is higher.)

1. An angle measuring sensor comprises

a shell, wherein the shell is provided with a mounting hole and a mounting part, the mounting part is provided with a first mounting position and a second mounting position,

A driving gear penetrating the mounting hole and mounted in the housing,

a first gear mounted on the first mounting location of the housing and engaged with the drive gear,

a second gear mounted on the second mounting location of the housing and engaged with the drive gear,

a PCB mounted in the mounting portion of the housing, suspended over the first and second gears,

An upper cover plate fixedly connected with the shell, a protection space formed between the upper cover plate and the shell, the PCB, the first gear and the second gear being located in the protection space,

a first rotor is embedded in the first gear, a second rotor is embedded in the second gear, the first rotor and the second rotor face the PCB,

and excitation coils and receiving coils are arranged on the PCB at positions corresponding to the first rotor and the second rotor.

2. angle measurement sensor according to claim 1,

The first rotor is provided with N fan blades which are embedded in the first gear with the number of teeth of N1,

The second rotor is provided with M fan blades which are embedded in a second gear with the number of teeth of M1,

the number of teeth of the driving gear is K,

the maximum absolute angle measured by the angle measuring sensor is the least common multiple of 360 × N1/(K × N) and 360 × M1/(K × M).

3. Angle measurement sensor according to claim 1,

a first mounting column is arranged on the first mounting position of the shell, a second mounting column is arranged on the second mounting position,

The first gear ring is sleeved on the first mounting column and movably connected with the shell, the second gear ring is sleeved on the second mounting column and movably connected with the shell,

the PCB is provided with a first mounting hole and a second mounting hole on the positions corresponding to the first mounting column and the second mounting column, the first mounting column penetrates through the first mounting hole, the second mounting column penetrates through the second mounting hole, and the PCB is fixedly connected to the first mounting column and the second mounting column of the shell.

4. Angle measurement sensor according to claim 3,

the first mounting column comprises a first limiting part and a second limiting part, the diameter of the first limiting part is larger than that of the second limiting part, the first gear is movably connected with the first limiting part, the PCB is fixedly connected with the first limiting part,

The second mounting column comprises a third limiting part and a fourth limiting part, the diameter of the third limiting part is larger than that of the fourth limiting part, the second gear is movably connected with the third limiting part, the PCB is fixedly connected with the fourth limiting part,

The length of the first limiting part is equal to that of the third limiting part, and the length of the second limiting part is equal to that of the fourth limiting part.

5. Angle measurement sensor according to claim 1,

At least one positioning column is further arranged in the mounting part, the height of the positioning column is larger than or equal to that of the first limiting part, and the PCB is fixedly connected with the positioning column.

6. angle measurement sensor according to claim 1,

And a conductive lead is arranged in the mounting part and electrically connected with the PCB.

7. Angle measurement sensor according to claim 6,

the shell is further provided with a first connecting port, the first connecting port is electrically connected with the conductive lead to realize the electrical connection with the outside, and the second connecting port realizes the fixed connection with the outside.

Technical Field

the invention relates to the technical field of object rotation angle measurement, in particular to an angle measurement sensor.

background

With the rapid development of scientific technology, vehicle driving assistance technology is continuously updated, and how to accurately detect and determine vehicle control components, such as the rotating position of a steering wheel, in the vehicle driving process becomes an important factor influencing the development of the vehicle driving assistance technology. Position sensors are commonly used in many electromechanical systems of modern vehicles to determine the driver's intent and, at the same time, the state of the engine or vehicle by detecting the position of the vehicle, e.g., the steering wheel, the accelerator pedal, etc. Potentiometers have been used for decades to measure position and angle. The design is simple, the price is low, and the vehicle brake system is widely applied to various vehicles, but faults are easy to occur due to many limitations, such as high temperature, vibration and other severe environments; only a small signal current or the like is allowed to pass, so that the potentiometer has not been able to meet the vehicle's demand for reliability of the electromechanical system or the like. The advent and use of non-contact sensors has greatly increased the reliability of electromechanical systems, and has received attention in the field of vehicle electromechanical systems.

currently, magnetic sensors such as hall or MR sensors and optical and inductive sensors are used more frequently, and hall sensors in particular are widely used for angle measurement. The Hall sensor measures the rotation angle in the electromechanical system of the vehicle through the matching of the magnet gear and the Hall chip, and controls the maximum range of the measured absolute angle by using the gear number of the control gear. However, the maximum value of the absolute angle that can be measured by the conventional sensor is required by the gear density, so that the measurement range cannot be further expanded, and the flexibility of angle measurement is insufficient.

Disclosure of Invention

in order to solve the above problems, the present invention provides an angle measurement sensor, which uses the electromagnetic induction principle, embeds a rotor in a gear, and uses the rotor to match with an excitation coil and a receiving coil, so as to determine the absolute angle range of measurement together by the number of rotor blades and the number of gear teeth. Thus, a technical solution is proposed to further increase the measurement range of the angle measurement sensor.

The angle measuring sensor comprises a shell, wherein the shell is provided with a mounting hole and a mounting part, and the mounting part is provided with a first mounting position and a second mounting position; the driving gear penetrates through the mounting hole and is mounted in the shell; the first gear is arranged on the first installation position of the shell and is meshed with the driving gear; the second gear is arranged on the second installation position of the shell and is meshed with the driving gear; a PCB mounted in the mounting portion of the housing, suspended over the first and second gears; the upper cover plate is fixedly connected with the shell, a protection space is formed between the upper cover plate and the shell, and the PCB, the first gear and the second gear are located in the protection space. The PCB comprises a PCB board, a first gear, a second gear, a first rotor, a second rotor, a driving coil and a receiving coil, wherein the first gear is embedded with the first rotor, the second gear is embedded with the second rotor, the first rotor and the second rotor face the PCB board, and the position, corresponding to the first rotor and the second rotor, of the PCB board is provided with the driving coil and the receiving coil.

preferably, the first rotor has N blades embedded in the first gear with the number of teeth N1, the second rotor has M blades embedded in the second gear with the number of teeth M1, the number of teeth of the driving gear is K, and the maximum absolute angle measured by the angle measuring sensor is the least common multiple of 360 × N1/(K × N) and 360 × M1/(K × M).

preferably, be provided with a first erection column on the first erection site of casing, be provided with a second erection column on the second erection site, first gear ring cover in on the first erection column with casing swing joint, second gear ring cover in on the second erection column with casing swing joint, correspond on the PCB board be provided with first mounting hole and second mounting hole on the position of first erection column and second erection column, first erection column runs through first mounting hole, the second erection column runs through the second mounting hole, PCB board fixed connection in on the first erection column and the second erection column of casing.

preferably, first erection column includes first spacing portion and the spacing portion of second, the diameter of first spacing portion is greater than the diameter of the spacing portion of second, first gear swing joint in first spacing portion, PCB board fixed connection in first spacing portion, the second erection column includes the spacing portion of third and the spacing portion of fourth, the diameter of the spacing portion of third is greater than the diameter of the spacing portion of fourth, second gear swing joint in the spacing portion of third, PCB board fixed connection in the spacing portion of fourth, the length of first spacing portion equals the length of the spacing portion of third, the length of the spacing portion of second equals the length of the spacing portion of fourth.

Preferably, at least one positioning column is further arranged in the mounting portion, the height of the positioning column is greater than or equal to that of the first limiting portion, and the PCB is fixedly connected with the positioning column.

Preferably, the mounting portion is provided with a conductive lead, and the conductive lead is electrically connected with the PCB board.

preferably, the shell is further provided with a first connecting port, the first connecting port is electrically connected with the conductive lead to realize the electrical connection with the outside, and a second connecting port realizes the fixed connection with the outside.

Compared with the prior art, the invention has the advantages that:

1) The measuring range of the angle measuring sensor is determined by the number of rotor blades and the number of gear teeth;

2) The absolute angle measuring range of the angle measuring sensor is high in precision, wide in range and high in flexibility.

Drawings

FIG. 1 is an exploded view of an angle measurement sensor in accordance with a preferred embodiment of the present invention;

FIG. 2 is a block diagram of a rotor of the angle measuring sensor of FIG. 1;

fig. 3 is a block diagram of a housing of another angle measuring sensor according to a preferred embodiment of the present invention.

Reference numerals:

1-a shell body, wherein the shell body is provided with a plurality of through holes,

10-mounting holes, 11-mounting parts,

111-a first mounting location, 112-a second mounting location, 113-a location post,

1111-a first mounting post, 1112-a first limit part, 1113-a second limit part, 1121-a second limit part, 1122-a third limit part, 1123-a fourth limit part,

2-the driving gear is driven by the gear,

3-the first gear wheel is arranged on the first gear wheel,

4-the second gear wheel is arranged on the second gear wheel,

5-a PCB board, wherein the PCB board is provided with a plurality of PCB boards,

6-upper cover plate.

Detailed Description

The advantages of the invention are explained in detail below with reference to the drawings and the embodiments.

the invention aims to overcome the defects of insufficient absolute angle measuring range and insufficient angle measuring flexibility of the conventional angle measuring device. A novel angle measuring sensor is proposed. Reference is made to fig. 1, which is a burst diagram of an angle measuring sensor in accordance with a preferred embodiment of the present invention. As can be seen from the figure, the angle measuring sensor provided by the present embodiment mainly includes: the gear box comprises a shell 1, a driving gear 2, a first gear 3, a second gear 4, a PCB 5 and an upper cover plate 6.

Referring to fig. 2, in the present embodiment, an angle measuring apparatus is specifically installed in such a manner that a mounting hole 10 and a mounting portion 11 are disposed on the housing 1, and a first mounting location 111 and a second mounting location 112 are disposed in the mounting portion 11, so that the driving gear 2 penetrates through the mounting hole 10 and is fixedly mounted on the housing 1, and the gear of the driving gear 2 faces and is exposed to the inside of the housing 1, so as to ensure that the gear of the driving gear 2 can rotate freely inside the housing 1; further, a first gear 3 is arranged on the first installation position and meshed with the driving gear 2; the second gear 4 is arranged on the second installation position and is also meshed with the driving gear 2, so that the driving gear 2 rotates to drive the first gear 3 and the second gear 4 to rotate together; further, the PCB board 5 is mounted in the first mounting portion 11, suspended above the first gear 3 and the second gear 4, and fixedly connected with the housing 1, but not in contact with the first gear 3 and the second gear 4; finally, the upper cover plate 6 is fixedly connected with the housing 1, the upper cover plate 6 is positioned above the PCB, a protection space is formed between the upper cover plate 6 and the housing 1, and the PCB, the first gear 3 and the second gear 4 are positioned in the protection space. Thus, the PCB board can be protected from external damage.

In particular, referring to fig. 2, in the present embodiment, a first rotor 31 is embedded in the first gear 3, and a second rotor 41 is embedded in the second gear, and after being installed, the first rotor 31 and the second rotor 41 are both faced to the PCB board. The PCB is provided with an excitation coil and a reception coil at a position facing and corresponding to the first rotor 31, and is also provided with an excitation coil and a reception coil at a position facing and corresponding to the second rotor 41.

in view of the above design, according to the electromagnetic induction principle, when the exciting coil is energized, the exciting coil will generate a coaxial magnetic field that changes at high frequency; the first rotor 31 and the second rotor 41 induce the coaxial magnetic field, wherein corresponding induced currents are generated, and under the action of the induced currents, the first rotor 31 and the second rotor 41 generate a secondary magnetic field; the secondary magnetic field is superposed on the receiving coil; the receiving coil generates an induced voltage under the action of the secondary magnetic field, the induced voltage is measured, and absolute position information of the first rotor 31 and the second rotor 41 can be obtained through a preset calculation method, and an absolute angle of rotation of the driving gear, that is, an absolute angle of rotation of a measured object such as a steering wheel, can be obtained through the absolute position information.

In another preferred embodiment consistent with the present invention, the first rotor 31 has N blades embedded in the first gear 3 with N1 teeth; the second rotor 41 has M blades embedded in the second gear 4 with M1 teeth, and the driving gear 2 has K teeth, so that the maximum absolute angle that can be measured by the angle sensor is the smallest common multiple of 360 × N1/(K × N) and 360 × M1/(K × M).

In another preferred embodiment consistent with the present invention, the angle measuring sensor may be mounted in such a manner that, referring to fig. 3, a first mounting pillar 1111 is disposed on the first mounting position 111 of the mounting portion 11 of the housing 1, and a second mounting pillar 1121 is disposed on the second mounting position 112; the first gear 3 is sleeved on the first mounting post 1111 to be movably connected with the housing 1, and the second gear 4 is sleeved on the second mounting post 1121 to be movably connected with the housing 1; and, the PCB 5 is provided with a first mounting hole 51 and a second mounting hole 51 at positions corresponding to the first mounting post 1111 and the second mounting post 1121, so that the first mounting post 1111 penetrates through the first mounting hole 51 and the second mounting post 1121 penetrates through the second mounting hole 52 during mounting, thereby the PCB 5 is fixedly connected to the first mounting post 1111 and the second mounting post 1121 of the housing 1. In view of the above method, on one hand, the gear, the PCB and the shell can be fixedly connected, and meanwhile, the positions of the exciting coil and the receiving coil on the PCB can be ensured to correspond to the direction of the rotor on the gear, so that the normal operation of the angle measuring sensor is effectively ensured.

In another preferred embodiment consistent with the present invention, the drive coil and the receive coil on the PCB board coincide with the central axis of the rotor on the gear.

In another preferred embodiment consistent with the present invention, the angle measuring sensor may be further mounted in such a manner that the first mounting pillar 1111 includes a first position-limiting portion 1112 and a second position-limiting portion 1113, and the diameter of the first position-limiting portion 1112 is greater than the diameter of the second position-limiting portion 1113, the first gear 3 is movably connected to the first position-limiting portion 1112, and the PCB 5 is fixedly connected to the second position-limiting portion 1113 by using the first mounting hole 51; meanwhile, the second mounting post 1121 includes a third limiting portion 1122 and a fourth limiting portion 1123, so that the diameter of the third limiting portion 1122 is greater than the diameter of the fourth limiting portion 1123, the second gear is movably connected to the third limiting portion 1122, the PCB 5 is fixedly connected to the fourth limiting portion 1123 through the second mounting hole 52, meanwhile, the length of the first limiting portion 1112 is controlled to be equal to the length of the third limiting portion 1122, the length of the second limiting portion 1113 is controlled to be equal to the length of the fourth limiting portion 1123, and the first gear 3, the second gear 4 and the PCB 5 can be respectively fixed to the housing, but the PCB is not in contact with the first gear and the second gear.

in another preferred embodiment consistent with the present invention, the angle measurement sensor may be further mounted in a manner that, referring to fig. 3, at least one positioning pillar 113 is further disposed in the mounting portion 11, and the height of the positioning pillar 113 is greater than or equal to the height of the first position-limiting portion 1112, and the height of the positioning pillar 113 is also greater than or equal to the height of the third position-limiting portion 1122, so as to fixedly connect the PCB and the positioning pillar 113, thereby further ensuring the fastening connection between the PCB and the housing and ensuring the effective operation of the angle measurement sensor.

In a further preferred embodiment according to the invention, the mounting of the angle-measuring sensor is provided with electrically conductive leads which are electrically connected to the PCB board.

in another preferred embodiment consistent with the present invention, a first connecting port is further disposed on the housing of the angle measuring sensor, and the first connecting port is electrically connected to the conductive lead to electrically connect the angle measuring sensor with the outside, so as to supply power to the PCB; and a second connector is also arranged to realize the fixed connection of the angle measuring sensor and the outside.

In another preferred embodiment consistent with the present invention, the angle measuring sensor has a chip on the PCB board, and can compute and obtain the measured absolute angle value according to the electrical signal provided by the receiving coil, and feed back the absolute angle value to the outside.

In summary, the present invention provides a novel angle measuring sensor with a measuring range determined by the number of rotor blades and the number of gear teeth, the absolute angle measuring range measured by the angle measuring sensor is more accurate and wider, and the measuring range is determined by the number of rotor blades and the number of gear teeth, so that the measuring range can be controlled by controlling the number of rotor blades or the number of gear teeth, and the flexibility is higher.

it should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.