KR102171408B1 - Real time predictive smart wheel sensor module for driving environment using multi-track encoder - Google Patents

Abstract

The present invention relates to a driving environment real-time estimation smart wheel sensor module using a multi-track encoder, which comprises: a hub bearing unit composed of a hub connected to a shaft, and a hub bearing mounted on the hub; a multi-track impulse ring coupled to the inner wheel of the hub bearing to be rotated along therewith, and composed of a rotation speed sensing track unit and a torque sensing track unit; and a sensing unit (SP) composed of a rotation speed detection sensor arranged to face the rotation speed sensing track unit of the multi-track impulse ring to detect change in the magnetic flux of the rotation speed sensing track unit in order to detect the rotation angle, the rotation direction and the rotation speed of an output shaft, a magnetic induction coil arranged to face the torque sensing track unit of the multi-track impulse ring to detect a current value changed in accordance with changes by the magnetic force of the torque sensing track unit, and a torque detection sensor receiving the current value according to changes in the magnetic force by the magnetic induction coil to detect a torque amount between an input shaft and the output shaft. Therefore, provided is the driving environment real-time estimation smart wheel sensor module using a multi-track encoder, which can simplify component parts, minimize the failure rate during assembly, improve efficiency in disassembly, embody stability in performance, and reduce costs.

Description

Real time predictive smart wheel sensor module for driving environment using multi-track encoder}

The present invention relates to a smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder capable of simplifying component parts and minimizing defect rates during assembly, as well as improving resolution and stabilizing performance and lowering prices.

In general, a vehicle is in danger of causing a spin, etc. when a vehicle accelerates or brakes rapidly on a slippery road surface, and the tire slips, and when an urgent steering is performed, the vehicle slides to the side or causes a spin, causing the vehicle's behavior. It can be unstable.

In order to prevent this, the current output torque of the engine is used to estimate the longitudinal torque applied to the wheel and apply it to mass-produced vehicles, but the accuracy is quite low.

In addition, it is difficult to accurately estimate the road surface friction coefficient depending on the weather condition and the presence of obstacles, and thus reliability is poor, and attempts to directly measure the wheel torque to solve this problem are under development.

In such a conventional road surface friction estimation method, a technique for obtaining a road surface condition in the front using an expensive camera and radar and estimating a road surface friction coefficient has been disclosed.

However, in the case of the prior art, the installation of an expensive camera or radar is absolutely necessary, so that price competitiveness is not obtained, and it is difficult to accurately estimate the road surface friction coefficient depending on weather conditions and the presence of obstacles, and reliability is still poor.

Republic of Korea Patent Publication No. 10-2019-0002941 (published on January 9, 2019)

The present invention has been devised to solve the above problems,

The object of the present invention is to provide a smart wheel sensor module for real-time prediction of the driving environment using a multi-track encoder that can simplify component parts and minimize defect rates during assembly, as well as improve resolution and performance stabilization, and lower prices.

A smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder according to the present invention comprises: a hub bearing unit comprising a hub connected to an axis and a hub bearing mounted on the hub; A multi-track impulse ring that is coupled to the inner ring of the hub bearing and rotates together, and includes a rotation speed sensing track portion and a torque sensing track portion; And a rotational speed detection sensor disposed to face the rotational speed sensing track part of the multi-track impulse ring to detect a change in magnetic flux of the rotational speed sensing track part to detect the rotation angle, rotation direction, and rotational speed of the output shaft. The magnetic induction coil is arranged to face the torque sensing track portion of the impulse ring to detect the current value that changes according to the change by the magnetic force of the torque sensing track portion, and the current value by the magnetic force change by the magnetic induction coil is received. It comprises a; sensing unit (SP) consisting of a torque detection sensor for detecting the amount of torque between the input shaft and the output shaft.

It is characterized in that it is coupled to the inner circumferential surface of the outer ring of the hub bearing according to the present invention, the sensing unit is mounted to further include a fixing support disposed above the multi-track impulse ring.

The sensing unit according to the present invention further comprises a first circuit board mounted on the fixed support, the rotation speed detection sensor, the magnetic induction coil, and the torque detection sensor arranged to face the multitrack impulse ring. It features.

The sensing unit according to the present invention may further include a second circuit board mounted on the fixing support, the magnetic induction coils arranged to face the torque sensing track unit of the multitrack impulse ring.

In the fixing support according to the present invention, a mounting hole is formed on one side of the second circuit board so that the rotational speed detection sensor of the sensing unit is fixed.

A bearing cap is mounted on an outer circumferential surface of the outer ring of the hub bearing according to the present invention to block foreign substances flowing into the sensing unit.

The multi-track impulse ring according to the present invention comprises a cylindrical coupling portion mounted on the inner ring of the hub bearing, and a disk portion connected to the cylindrical coupling portion and on which the rotational speed sensing track portion and the torque sensing track portion are disposed. It is characterized.

The rotational speed sensing track unit according to the present invention is composed of a multi-pole master track and a non-neous track, and the master track and the non-neous track have a polarity distribution of one pole pair to deviate from each other. It characterized in that it is arranged.

The disk portion according to the present invention is further provided with an extension extending in an inward direction, wherein a master track of the rotational speed sensing track portion, a noise track and the torque sensing track portion are disposed on the disk portion and the upper surface of the extension portion. To do.

A shielding track for shielding mutual magnetic fields is further provided between the rotational speed sensing track part and the torque sensing track part according to the present invention.

The rotational speed detection sensor of the sensing unit according to the present invention is a Hall IC or a magnetoresistive IC.

The torque detection sensor of the sensing unit according to the present invention is characterized in that it is configured with any one of an inductive IC, an oscillator IC, and a generator generating a carrier frequency.

The smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder according to the present invention simplifies components, minimizes defect rates during assembly, and improves resolution and stabilizes performance, and lowers prices.

In addition, the present invention calculates the real-time longitudinal wheel torque value by attaching a smart wheel sensor module coaxial with the rotating wheel to estimate the friction coefficient between the wheel and the road surface in real time. You can provide data that you can.

In addition, the present invention can be achieved by measuring the existing rotational speed by the rotational speed sensing track unit consisting of a master track and a nonusable track. In particular, sensing signals transmitted from the torque sensing track unit and sensing transmitted from the rotational speed sensing track unit By combining signals, it is possible to provide data with higher resolution, and by forming only one track of the master track and non-near's track of the rotational speed sensing track, the sensing signal is output, and the sensing signal transmitted from the torque sensing track is combined. It can also provide data of the desired resolution.

1 is a perspective view showing a smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder according to the present invention;
2 is a cross-sectional view showing a smart wheel sensor module according to the present invention,
3 is a cross-sectional view showing another embodiment of the smart wheel sensor module according to the present invention,
4 and 5 are perspective and cross-sectional views showing a multi-track impulse ring of a smart wheel sensor module according to the present invention,
6 is a cross-sectional view showing an application example of a sensing unit and a fixing support of a smart wheel sensor module according to the present invention;
7 is a plan view showing a sensing unit and a fixing support of the smart wheel sensor module according to the present invention.

In order to explain the present invention and the operational advantages of the present invention and the object achieved by the implementation of the present invention, the following describes a preferred embodiment of the present invention and looks at it with reference.

First, terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention, and expressions in the singular may include a plurality of expressions unless clearly differently in context. In addition, in the present application, terms such as "comprise" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other It is to be understood that the presence or addition of features, numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being excluded.

In describing the present invention, when it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

As shown in FIGS. 1 to 7, the smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder according to the present invention includes a hub bearing unit 10 and a multi-track impulse ring coupled to the inner ring 13b of the hub bearing. It comprises a sensing unit (SP) consisting of (30), the rotational speed detection sensor 50, the magnetic induction coil 60 and the torque detection sensor 70. In addition, a fixing support 90 mounted on the outer ring 13a of the hub bearing is provided, and the fixing support 90 includes first and second circuit boards 40 and 41 of the sensing unit or separate mounting holes 91 A rotation speed detection sensor 50, a magnetic induction coil 60 and a torque detection sensor 70 are provided.

In this case, the circuit board includes a rotation speed sensor 50, a power supply unit (L, C, regulator), and a signal processing unit (MCU), and the torque detection circuit unit includes a torque detection sensor (inductive type) and a resonance circuit. It is composed of (L, C), a power supply unit, an amplifier circuit, a filter circuit, and a signal processing unit. Here, the amplification circuit and the filter circuit may be deleted according to the magnetic material of the multi-track impulse ring. In addition, the torque detection sensor of the torque detection circuit part can be configured by applying the oscillator IC to eliminate the resonance circuit.

1 to 3, the hub bearing unit 10 according to the present invention comprises a hub 11 through which a shaft is connected and a hub bearing 13 mounted outside the hub 11. .

That is, the hub bearing unit 10 includes a hub 11 and a housing 15 disposed outside the hub 11, and a hub bearing 13 is mounted between the hub 11 and the housing 15. That is, the outer ring 13a of the hub bearing 13 is mounted on the housing 15, and the inner ring 13b of the hub bearing 13 is mounted on the outer surface of the hub 11.

As shown in FIGS. 1 to 6, the multi-track impulse ring 30 according to the present invention is coupled to the inner ring 13b of the hub bearing 13.

The multi-track impulse ring 30 constituted in this way is composed of a rotational speed sensing track part 31 and a torque sensing track part 33, and for this arrangement, a cylindrical coupling part 35 is provided so that the hub bearing 13 It is mounted on the outer surface of the inner ring (13b), a disk portion 37 is provided horizontally connected to the upper end of the cylindrical coupling portion (35). A rotational speed sensing track part 31 and a torque sensing track part 33 are formed on the upper surface of the disc part 37 to face the sensing part SP. Therefore, the multi-track impulse ring 30 rotates together with the inner ring 13b of the hub bearing 13 fixed to the shaft.

The rotational speed sensing track part 31 and the torque sensing track part 33 of the multi-track impulse ring 30 are composed of multiple poles, each with one track, and a rotational speed sensing track part 31 disposed inside, A torque sensing track part 33 may be disposed outside. In addition, although not shown in the accompanying drawings, it is possible that a torque sensing track portion is disposed inside the track and a rotational speed sensing track portion is disposed outside. However, hereinafter, the description will be made on the premise that the rotational speed sensing track part is disposed on the inner side and the torque sensing track part is disposed on the outer side as in the former.

In this case, high-resolution data is provided by combining the sensing signal transmitted from the torque sensing track unit 33 and the sensing signal transmitted from the rotational speed sensing track unit 31. In order to provide higher resolution data, the rotational speed It is preferable to configure the sensing track unit 31 with a master track 31a and a nonius track 31b.

Accordingly, the non-neous track 31b and the master track 31a of the rotational speed track portion 31 are arranged in the disk portion 37 from the inside, and the torque track portion 33 is arranged outside the master track 31a.

In this case, the polarity distributions of the master track 31a and the nonus track 31b are formed by a difference between one polar pair and are arranged to cross each other. That is, as shown in FIG. 5, if the master track 31a has N pole pairs, the non-neous track 31b has N+1 pole pairs.

Further, a shielding track 80 is formed between the rotational speed track portion 31 and the torque track portion 33 of the multi-track impulse ring 30 to shield the magnetic field between the respective track portions. The shielding track 80 can obtain an effect of preventing a sensing error by blocking mutual interference between magnetic fields generated in each track portion.

As a result, the disk portion 37 of the multi-track impulse ring 30 has a non-neous track 31b, a master track 31a, a shield track 80 and a torque sensing track portion of the rotational speed sensing track portion 31 from the inside. (33) are arranged and configured sequentially.

As shown in FIGS. 1 to 3, 6 and 7, the sensing unit SP according to the present invention includes a line speed detection sensor 50, a magnetic induction coil 60, and a torque detection sensor 70. It is disposed to face the impulse ring 30.

In this case, a fixing support 90 is provided so that the sensing unit SP may be disposed to face the multi-track impulse ring 30, and the fixing support is an outer ring of the hub bearing as shown in FIGS. 13a) It is bonded to the inner peripheral surface. In addition, the fixing support 90 has a cross-sectional shape of one side in the shape of a'L' so that the upper plate faces the multi-track impulse ring 30 disposed below.

In the fixed support 90 configured as described above, a sensing unit SP, that is, a rotation speed detection sensor 50, a magnetic induction coil 60, and a torque detection sensor 70, are provided with the first and second circuit boards 40, 41 ) Or may be installed using a separate mounting hole 91.

First, the rotational speed detection sensor 50 of the sensing unit is disposed to face the rotational speed track unit 31 of the multi-track impulse ring 30 to detect a change in magnetic force, and according to the detected magnetic force change, the rotation amount, rotation direction, and The rotation speed is detected.

In this case, the rotational speed detection sensor 50 can measure the rotational amount, rotational direction, and rotational speed through respective magnetic signals for the mast track 31a and the noniers track 31b of the rotational speed sensing track unit 31. I can. In addition, the rotational speed detection sensor 50 is one Hall IC 50 that simultaneously detects a magnetic flux change that differs between the master track 31a of the rotational speed sensing track unit 31 and the non-near's track 31b. , For example, it is possible to measure the rotational speed and the amount of change in direction even with a Hall IC comprising two or more Hall elements. In addition, the object of the present invention can be achieved by applying a magnetoresistive IC (AMR IC) capable of detecting a change in magnetic force.

In this case, as shown in FIG. 7, the rotation speed detection sensor 50 can be disposed on the circuit board 40 (more specifically, the first circuit board) with two positions spaced apart at regular intervals, which detects two rotation speeds. If a malfunction occurs, such as when the rotation speed detection sensor 50 does not operate while detecting a change in the magnetic flux of the rotation speed sensing track unit 31 with only one rotation speed detection sensor 50 of the sensors 50, Another rotational speed detection sensor 50 may be configured to operate. That is, by configuring a plurality of rotation speed detection sensors 50, it is possible to prepare for an emergency situation in which one rotation speed detection sensor 50 is not operated due to failure or damage, and thereby prevent an operation error in advance. . In this case, by combining the sensing signal detected from the torque detection sensor 70 and the sensing signal of the rotational speed detection sensor 50, it is possible to cope with an emergency situation.

Next, the magnetic induction coil 60 of the sensing unit is pattern printed on the first and second circuit boards 40 and 41 so as to be disposed facing the torque sensing track unit 33 of the multitrack impulse ring. Therefore, it is possible to simplify the constituent parts in that a separate configuration such as an ordinary iron piece for magnetic induction can be omitted.

In addition, the carrier frequency generated from the torque detection sensor 70 (inductive IC, oscillator IC) of the sensing unit is transmitted to the magnetic induction coil 60, and the current value that changes according to the change of the magnetic force of the torque sensing track unit 33 is again It transmits to the torque detection sensor 70, transmits the processed analog signal to the signal processing unit, processes it as a digital signal, and outputs it.

The torque detection sensor 70 is disposed on one side of the first and second circuit boards 40 and 41 to detect the current value transmitted from the magnetic induction coil 60 to detect the amount of torque applied to the shaft. Perform.

In this case, as shown in FIG. 7, the torque detection sensor 70 also prepares for an emergency situation that is not operated due to failure or damage, such as the rotation speed detection sensor 50, and prevents operation errors in advance. It can be configured to have a location. In addition, the torque detection sensor 70 may be composed of an inductive IC, an oscillator IC, or a generator capable of generating a carrier frequency.

The sensing unit SP according to the present invention configured as described above includes the rotation speed detection sensor 50, the magnetic induction coil 60, and the torque detection sensor 70 on one circuit board by the fixing support 90. It may be integrally arranged and electrically connected, or may be mounted through a separate mounting hole 91.

First, when integrated on one circuit board, a rotation speed detection sensor 50 and a pattern printed on the first circuit board 40 on the lower surface of the upper plate of the fixing support 90 as shown in FIG. 6(a) A magnetic induction coil 60 and a torque detection sensor 70 are disposed. In this case, the fixing support 90 and the first circuit board 40 may be molded to be protected, or may be fixed by a coupler.

Next, in the case of introducing a separate mounting hole 91, a mounting hole 91 is formed on the fixing support 90 as shown in (b) of FIG. 6 to mount the rotational speed detection sensor 50, and pattern printing The magnetic induction coil 60 may be formed on the second circuit board 41 and fixed to the fixing support 90. In this case, a torque detection sensor 70 may be formed on the second circuit board 41, and may be fixed by a separate mounting hole such as a rotation speed detection sensor if necessary.

As described above, the fixing support 90 is mounted on the inner circumferential surface of the outer ring 13a of the hub bearing, and the sensing unit SP formed on the first circuit board 40 or the second circuit board 41 and the mounting hole 91 ) Is disposed facing the multi-track impulse ring 30 mounted on the inner ring 13b of the hub bearing 13.

In this case, the multi-track impulse ring 30 integrates the rotational speed sensing track portion 31 and the torque sensing track portion 33 into one disk portion 37. That is, as shown in Fig. 4, the disk portion 37 and the cylindrical coupling portion 35 have a cross-sectional shape of one side of a "a" shape, so that the rotational speed sensing track portion 31 and the torque sensing track portion 33 are the disk portion ( It is formed on the upper surface of 7) and faces the sensing unit SP.

Further, when the rotational speed sensing track portion 31 of the multi-track impulse ring is composed of a master track 31a and a non-near track 31b, that is, when three tracks are to be arranged on the disk portion, the disk portion 37 It is possible to form an extension 39 extending inward from the end of the. In this case, as shown in Fig. 5, the cylindrical coupling part 35, the disk part, and the extension part have a cross-sectional shape of "TT" on the upper surface, and the master track 31a and the non-near's track of the rotational speed sensing track part 31 (31b), the torque sensing track portion 33, and three tracks are formed to face the sensing portion SP.

In this case, as described above, the first and second circuit boards 40 and 41 are molded of a polymer material to protect external moisture and dust, thereby improving reliability.

Further, in the present invention, the sensing unit (SP) is mounted by the fixing support (90), in which case it is necessary to prevent foreign substances such as external moisture or dust from entering, and for this purpose, the outer ring (13a) of the hub bearing It is also preferable to introduce a bearing cap 20 mounted on the outer circumferential surface to prevent inflow of foreign matter.

In this case, as described above, the sensing unit is not mounted on the fixing support, but the circuit board is integrally mounted on the bearing cap to implement downsizing.

As described above, the sensor module according to the present invention is provided as a multi-track impulse ring in which the sensing unit is packaged as a single circuit board or a separate mounting unit on a fixed support, and a plurality of tracks are integrally arranged, thereby simplifying component parts. Downsizing is possible, assembly is also easy and simple, and performance can be stabilized and price can be lowered, thereby securing competitiveness.

In addition, although not shown in the accompanying drawings, a connector is provided on the circuit board to supply power to the sensor module, and the detection information detected from the rotational speed detection sensor and the torque detection sensor is transmitted to an external microcontroller, and the microcontroller The torque amount and rotation amount are determined by comparing the preset reference value with the detection information.

As described above, the present invention has been described with reference to an embodiment shown in the drawings, but this is only an example, and various modifications and other equivalent embodiments are possible from those of ordinary skill in the art. Will understand.

Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

SP: sensing unit
10: hub bearing unit
11: hub 13: hub bearing
13a: outer ring 13b: inner ring
15: housing
20: bearing cap
30: multi-track impulse ring
31: rotational speed sensing track portion 31a: master track
31b: nonus track 33: torque sensing track portion
35: cylindrical coupling portion 37: disk portion
39: extension
40: first circuit board 41: second circuit board
50: rotation speed detection sensor
60: magnetic induction coil
70: torque detection sensor
80: shielding track
90: fixed support
91: mounting part

Claims (12)

A hub bearing unit 10 consisting of a hub 11 connected to the shaft and a hub bearing 13 mounted on the hub 11;
A multi-track impulse ring 30 composed of a rotational speed sensing track part 31 and a torque sensing track part 33 coupled to the inner ring 13b of the hub bearing 13 and rotating together; And
It is arranged to face the rotational speed sensing track part 31 of the multi-track impulse ring 30 to detect the change in magnetic flux of the rotational speed sensing track part 31 to detect the rotation angle, rotation direction, and rotation speed of the output shaft. A rotational speed detection sensor 50,
A magnetic induction coil 60 disposed to face the torque sensing track portion 33 of the multi-track impulse ring 30 to detect a current value that changes according to the change by the magnetic force of the torque sensing track portion 33; and ,
A sensing unit (SP) comprising a torque detection sensor 70 configured to receive a current value due to a change in magnetic force by the magnetic induction coil 60 and detect the amount of torque between the input shaft and the output shaft;
Including,
The multi-track impulse ring 30 is
A cylindrical coupling part 35 mounted on the inner ring 13b of the hub bearing 13,
It is connected to the cylindrical coupling portion 35 and includes a disk portion 37 on which the rotational speed sensing track portion 31 and the torque sensing track portion 33 are disposed,
The rotational speed sensing track part 31 is composed of a multi-pole master track 31a and a non-near track 31b,
The master track (31a) and the nonus track (31b) is characterized in that the polarity distribution is formed by a difference between one pole pair and are arranged to shift from each other.
Smart wheel sensor module for real-time prediction of driving environment using multi-track encoder.
The method of claim 1,
A multi-track encoder, characterized in that it is coupled to the inner circumferential surface of the outer ring (13a) of the hub bearing, the sensing unit (SP) is mounted, and a fixing support (90) disposed above the multi-track impulse ring (30) is further provided Real-time prediction of driving environment using smart wheel sensor module.
The method of claim 2,
The sensing unit (SP) is mounted on the fixed support (90), and the rotational speed detection sensor (50), the magnetic induction coil (60) and the torque detection sensor (70) are arranged so that the multi-track impulse ring ( A smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder, further comprising: a first circuit board 40 formed to face 30).
The method of claim 2,
The sensing unit (SP) is mounted on the fixing support (90), the magnetic induction coil (60) is arranged to face the torque sensing track unit (33) of the multi-track impulse ring, a second circuit board ( 41) a smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder, characterized in that it further comprises.
The method of claim 4,
A driving environment using a multi-track encoder, characterized in that a mounting hole 91 is formed on one side of the second circuit board 41 in the fixing support 90 so that the rotational speed detection sensor 50 of the sensing unit is fixed. Real-time prediction smart wheel sensor module.
The method according to any one of claims 1 to 5,
A smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder, characterized in that a bearing cap 20 is mounted on the outer circumferential surface of the outer ring 13a of the hub bearing to block foreign substances flowing into the sensing unit SP.
delete delete The method of claim 1,
The disk portion 37 is further provided with an extension portion 39 extending in the inward direction,
The master track 31a, the noise track 31b and the torque sensing track 33 of the rotational speed sensing track part 31 are arranged on the upper surface of the disk part 37 and the extension part 39 Smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder, characterized in that.
The method according to any one of claims 1 to 5,
Real-time prediction smart driving environment using a multi-track encoder, characterized in that a shielding track 80 for shielding mutual magnetic fields is further provided between the rotational speed sensing track unit 31 and the torque sensing track unit 33 Wheel sensor module.
The method according to any one of claims 1 to 5,
The rotational speed detection sensor 50 of the sensing unit is a smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder, characterized in that the Hall IC or the magnetoresistive IC.
The method according to any one of claims 1 to 5,
The torque detection sensor 70 of the sensing unit is a smart wheel sensor module for real-time prediction of a driving environment using a multi-track encoder, characterized in that it is composed of any one of an inductive IC, an oscillator IC, and a generator generating a carrier frequency.

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