KR20210048918A - Wheel speed sensing information detection device - Google Patents

Abstract

An apparatus for detecting wheel speed sensing information is disclosed. The apparatus for detecting wheel speed sensing information according to one embodiment of the present invention detects speed sensing information from a wheel speed sensor. The apparatus for detecting wheel speed sensing information includes: a first detection unit including a first sensing part for detecting the sensing information; a second detection unit detecting the sensing information and including a second sensing part connected to the first sensing part; and a control unit for controlling the first detection unit and the second detection unit to detect the sensing information through at least one of the first sensing part and the second sensing part. It is possible to provide the apparatus for detecting wheel speed sensing information with improved stability and reliability.

Description

Wheel speed sensing information detection device {WHEEL SPEED SENSING INFORMATION DETECTION DEVICE}

The present invention relates to a wheel speed sensing information detection device, and more particularly, to a wheel speed sensing information detection device for detecting sensing information of a wheel speed sensor installed on a wheel of a vehicle.

In general, to improve vehicle driving and braking stability, vehicle attitude control system (ESP: Electronic Stability Program), anti-lock brake system (ABS), and collision control system that prevents wheel slipping in vehicles. (TCS: Traction Control System), etc. are provided.

Such systems require vehicle wheel speed information as input. Accordingly, a wheel speed sensor that detects the wheel speed is installed on the wheel of the vehicle, and the electronic control unit (ECU) that controls the above-described vehicle systems receives sensing information detected by the wheel speed sensor, and receives the input sensing information. It includes a detection circuit that analyzes and detects the wheel speed of the vehicle.

The conventional detection circuit does not include a preliminary configuration that can replace the wheel speed sensing function in the event of a failure. As a result, when the detection circuit fails, the above-described vehicle systems cannot perform their normal functions, and a problem may occur in the safety function of the vehicle. This problem is very fatal for the driverless vehicle, which has been actively researched and developed in recent years.

In such a situation, there is a need to develop a technology capable of improving the stability and reliability of a detection circuit of an electronic control unit that detects sensing information of a vehicle wheel speed sensor.

Patent Publication No. 10-2007-0036854 "A vehicle wheel speed detection signal output circuit", 2007. 04. 04

The present invention is to solve the above-described problems of the prior art, and is to provide a wheel speed sensing information detection apparatus with improved stability and reliability by having a dual detection circuit for detecting sensing information of a vehicle wheel speed sensor.

In addition, an object of the present invention is to provide a wheel speed sensing information detection device that enables it to effectively determine whether a detection circuit for detecting sensing information of a wheel speed sensor of a vehicle has failed.

According to an aspect of the present invention, there is provided an apparatus for detecting sensing information of a wheel speed sensor, comprising: a first detection unit including a first sensing unit for detecting the sensing information; A second detection unit connected to the first sensing unit and including a second sensing unit configured to detect the sensing information; And a control unit that controls the first detection unit and the second detection unit so that the sensing information is detected through one or more of the first sensing unit and the second sensing unit. Is provided.

In this case, the control unit may compare the sensing information detected by the first sensing unit and the sensing information detected by the second sensing unit to determine whether the first detection unit and the second detection unit have a failure.

In addition, when it is determined that the first detection unit is faulty, the control unit may block the connection of the first sensing unit and the second sensing unit, and control only the second sensing unit to detect the sensing information. have.

In addition, when it is determined that the second detection unit is faulty, the control unit may block the connection of the first sensing unit and the second sensing unit, and control only the first sensing unit to detect the sensing information. have.

According to another aspect of the present invention, an apparatus for detecting sensing information of a wheel speed sensor, comprising: a first power source, a first ground connected to the first power source, and a first power source disposed between the first power source and the first ground. A first detection unit including a switch, a second switch disposed between the first switch and the first ground, and a first sensing unit disposed between the first power source and the first switch; A second power source connected to the first power source and the first ground, a second ground connected to the second power source, a third switch disposed between the second power source and the second ground, the third switch and the second A second detection unit including a fourth switch disposed between grounds and a second sensing unit disposed between the fourth switch and the second ground; And a control unit configured to detect the sensing information through at least one of the first sensing unit and the second sensing unit by controlling the first to fourth switches.

At this time, the control unit closes the first switch and the fourth switch, and opens the second switch and the third switch, and the first power supply, the first sensing unit, the second sensing unit, and the second The ground is connected in series, and sensing information detected by the first sensing unit and sensing information detected by the second sensing unit may be compared to determine whether the first detection unit and the second detection unit have a failure.

In addition, when it is determined that the first detection unit is faulty, the control unit opens the first switch and the second switch, closes the third switch and the fourth switch, The sensing unit and the second ground may be connected in series.

In addition, when the control unit determines that the second detection unit is faulty, the first switch and the second switch are closed, and the third switch and the fourth switch are opened, and the first power supply and the first The sensing unit and the first ground may be connected in series.

According to an embodiment of the present invention, it is possible to effectively detect wheel speed sensing information and whether or not the detection unit has failed through sensing units included in each of the two detection units.

In addition, according to an embodiment of the present invention, the connection between the sensing units included in each of the two detection units can be variably controlled, so that even when one detection unit fails, the wheel speed sensing information can be detected .

1 is a block diagram of an apparatus for detecting wheel speed sensing information according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an operation of a device for detecting wheel speed sensing information according to an embodiment of the present invention in a normal state.
3 is a view showing an operation state when a first detection unit of the apparatus for detecting wheel speed sensing information according to an embodiment of the present invention fails.
4 is a view showing an operation state when a second detection unit of the apparatus for detecting wheel speed sensing information according to an embodiment of the present invention fails.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In order to clearly describe the present invention, parts irrelevant to the description are omitted in the drawings, and the same reference numerals are assigned to the same or similar components throughout the specification.

In the present specification, 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 features. It is to be understood that the presence or addition of elements, numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

1 is a block diagram of an apparatus for detecting wheel speed sensing information according to an embodiment of the present invention.

The apparatus for detecting wheel speed sensing information according to an embodiment of the present invention is an apparatus for detecting sensing information of a wheel speed sensor (not shown) installed on a wheel side of a vehicle. Eventually, the wheel speed of the vehicle may be measured through the detection of the sensing information. In this case, the sensing information may be transmitted in the form of a current flow, and the wheel speed sensing information detection apparatus according to an embodiment of the present invention may detect a signal from the transmitted current flow.

Referring to FIG. 1, a wheel speed sensing information detection device according to an embodiment of the present invention is a wheel speed sensing information detection device that detects sensing information from a wheel speed sensor, and includes a first detection unit 10 and a second detection. It includes a unit 20 and a control unit 30.

The first detection unit 10 includes a first sensing unit 15 for detecting the sensing information. In more detail, the first detection unit 10 is disposed between the first power source 11, the first ground 12 connected to the first power source 11, and the first power source 11 and the first ground 12 The first switch 13, the second switch 14 disposed between the first switch 13 and the first ground 12, and the first power supply 11 and the first switch 13 It includes a first sensing unit (15).

The first sensing unit 15 detects sensing information of the wheel speed sensor. The first sensing unit 15 may include a current detection circuit. The first sensing unit 15 may detect sensing information of the wheel speed sensor by receiving the current flow of the wheel speed sensor and detecting a signal through the current detection circuit.

In an embodiment of the present invention, the first sensing unit 15 may operate by receiving power from the first power source 11. In addition, the first sensing unit 15 may be connected to the first power source 11 and the second ground 22 to be described later, or may be connected to the first power source 11 and the first ground 12.

The second detection unit 20 is connected to the first sensing unit 15 and includes a second sensing unit 25 for detecting the sensing information. In more detail, the second detection unit 20 includes a second power source 21 connected to the first power source 11 and the first ground 12, a second ground 22 connected to the second power source 21, and 2 A third switch 23 disposed between the power source 21 and the second ground 22, a fourth switch 24 disposed between the third switch 23 and the second ground 22, and a fourth And a second sensing unit 25 disposed between the switch 24 and the second ground 22.

The second sensing unit 25 detects sensing information of the wheel speed sensor. Like the first sensing unit 15, the second sensing unit 25 may include a current detection circuit. The second sensing unit 25 may detect sensing information of the wheel speed sensor by receiving the current flow of the wheel speed sensor and detecting a signal through the current detection circuit.

In an embodiment of the present invention, the second sensing unit 25 may operate by receiving power from the first power source 11 or the second power source 21. When the second sensing unit 25 receives power from the first power source 11, the second sensing unit 25 includes the first power source 11, the first sensing unit 15, and the second ground 22. Is connected with. In addition, when the second sensing unit 25 receives power from the second power source 21, the second sensing unit 25 is connected to the second power source 21 and the second ground 22.

The control unit 30 controls the first detection unit 10 and the second detection unit 20 so that the sensing information is detected through one or more of the first sensing unit 10 and the second sensing unit 20 do. The control unit 30 may include a control circuit connected to the first detection unit 10 and the second detection unit 20.

In one embodiment of the present invention, the control unit 30 controls the first to fourth switches 13, 14, 23, 24 to control any one of the first sensing unit 15 and the second sensing unit 25 Through the above, the sensing information may be detected.

Hereinafter, an operation of the apparatus for detecting wheel speed sensing information according to an exemplary embodiment will be described in detail with reference to FIGS. 2 to 4.

FIG. 2 is a diagram illustrating an operation of a device for detecting wheel speed sensing information according to an embodiment of the present invention in a normal state.

Referring to FIG. 2, when both the first detection unit 10 and the second detection unit 20 are in a normal state, the control unit 30 includes sensing information detected by the first sensing unit 15 and a second sensing unit. By comparing the sensing information detected by (25), it may be determined whether or not the first detection unit 10 and the second detection unit 20 have a failure.

In more detail, the control unit 30 closes the first switch 13 and the fourth switch 24, opens the second switch 14 and the third switch 23, The first sensing unit 15, the second sensing unit 25, and the second ground 22 may be connected in series. That is, the control unit 30 may perform control such that power is provided by the first detection unit 10 and ground is provided by the second detection unit 20.

In the state of being connected in this way, the first sensing unit 15 and the second sensing unit 25 are connected to the first power source 11 to receive current from each wheel speed sensor to detect sensing information. In this case, the first sensing unit 15 and the second sensing unit 25 independently detect sensing information without affecting currents recognized by each other. In addition, the control unit 30 compares the sensing information detected by the first sensing unit 15 and the sensing information detected by the second sensing unit 25 to obtain information related to the failure of the wheel speed sensor and the wheel speed. Can be detected.

On the other hand, the control unit 30 compares the sensing information detected by the first sensing unit 15 and the sensing information detected by the second sensing unit 25 to determine the first detection unit 10 and the second detection unit 20. ) Can be judged. In more detail, the control unit 30 determines that the first detection unit 10 has failed when there is a problem in detection of the sensing information by the first sensing unit 15, and When there is a problem in detecting the sensing information, it may be determined that the second detection unit 20 has failed.

3 is a view showing an operation state when a first detection unit of the apparatus for detecting wheel speed sensing information according to an embodiment of the present invention fails.

Referring to FIG. 3, when it is determined that the first detection unit 10 is faulty, the control unit 30 cuts off the connection between the first sensing unit 15 and the second sensing unit 25 and performs a second sensing. Only the unit 25 can control the sensing information to be detected.

In more detail, the control unit 30 opens the first switch 13 and the second switch 14, when it is determined that the first detection unit 10 is faulty, and the third switch 23 and the fourth switch By closing (24), the second power source 21, the second sensing unit 25, and the second ground 22 can be connected in series.

That is, in the control unit 30, when both power and ground are provided by the second detection unit 20, the second sensing unit 25 of the second detection unit 20 singly provides sensing information of the wheel speed sensor. Control can be performed to detect. Accordingly, in spite of a failure of the first detection unit 10, sensing information of the wheel speed sensor may be detected by the second detection unit 20.

4 is a view showing an operation state when a second detection unit of the apparatus for detecting wheel speed sensing information according to an embodiment of the present invention fails.

Referring to FIG. 4, when it is determined that the second detection unit 20 is faulty, the control unit 30 cuts off the connection between the first sensing unit 15 and the second sensing unit 25 and performs the first sensing. Only the unit 15 can control the sensing information to be detected.

In more detail, when it is determined that the second detection unit 20 is faulty, the control unit 30 closes the first switch 13 and the second switch 14, and the third switch 23 and the fourth switch By opening 24, the first power source 11, the first sensing unit 15, and the first ground 12 may be connected in series.

That is, the control unit 30 controls the first sensing unit 15 of the first detection unit 10 to independently detect sensing information while both power and ground are provided by the first detection unit 10. can do. Accordingly, in spite of a failure of the second detection unit 20, sensing information of the wheel speed sensor may be detected by the first detection unit 10.

In the case of the wheel speed sensing information detection apparatus according to an embodiment of the present invention, the first sensing unit 15 and the second sensing unit ( Through 25), wheel speed sensing information can be effectively detected. In addition, it is possible to determine whether or not the first detection unit 10 and the second detection unit 20 has a failure by comparing the detection information of the first sensing unit 15 and the detection information of the second sensing unit 25. have.

Furthermore, even when one of the first detection unit 10 and the second detection unit 20 fails, the wheel speed sensing information can be continuously detected by the other, thereby improving stability and reliability.

Although one embodiment of the present invention has been described, the spirit of the present invention is not limited by the embodiments presented in the present specification, and those skilled in the art who understand the spirit of the present invention, within the scope of the same idea, the addition of components, Other embodiments may be easily proposed by changes, deletions, additions, and the like, but it will be said that this is also within the scope of the present invention.

10: first detection unit
20: second detection unit
30: control unit

Claims (8)

As a device that detects the sensing information of the wheel speed sensor,
A first detection unit including a first sensing unit that detects the sensing information;
A second detection unit connected to the first sensing unit and including a second sensing unit configured to detect the sensing information; and
Wheel speed sensing information detection apparatus comprising a control unit that controls the first detection unit and the second detection unit so that the sensing information is detected through at least one of the first sensing unit and the second sensing unit. The method of claim 1,
The control unit compares the sensing information detected by the first sensing unit and the sensing information detected by the second sensing unit to determine whether the first detection unit and the second detection unit have failed. The method of claim 2,
When it is determined that the first detection unit is faulty, the control unit cuts off the connection of the first sensing unit and the second sensing unit, and controls wheel speed sensing so that only the second sensing unit detects the sensing information. Information detection device. The method of claim 2,
When the control unit determines that the second detection unit is faulty, the first sensing unit and the second sensing unit are disconnected, and the wheel speed sensing is controlled so that only the first sensing unit detects the sensing information. Information detection device. As a device that detects the sensing information of the wheel speed sensor,
A first power source, a first ground connected to the first power source, a first switch disposed between the first power source and the first ground, a second switch disposed between the first switch and the first ground, and the second ground. A first detection unit including a first sensing unit disposed between the first power source and the first switch;
A second power source connected to the first power source and the first ground, a second ground connected to the second power source, a third switch disposed between the second power source and the second ground, the third switch and the second A second detection unit including a fourth switch disposed between grounds and a second sensing unit disposed between the fourth switch and the second ground, and
And a control unit configured to detect the sensing information through at least one of the first sensing unit and the second sensing unit by controlling the first to fourth switches. The method of claim 5,
The control unit closes the first switch and the fourth switch, opens the second switch and the third switch, and connects the first power source, the first sensing unit, the second sensing unit, and the second ground. Wheel speed sensing information detection device that is connected in series and compares sensing information detected by the first sensing unit and sensing information detected by the second sensing unit to determine whether the first detection unit and the second detection unit fail . The method of claim 6,
When it is determined that the first detection unit is a failure, the control unit opens the first switch and the second switch, and closes the third switch and the fourth switch, so that the second power supply and the second sensing unit And a wheel speed sensing information detection device connecting the second ground in series. The method of claim 6,
When the control unit determines that the second detection unit is faulty, the first switch and the second switch are closed, and the third switch and the fourth switch are opened, and the first power supply and the first sensing unit And a wheel speed sensing information detection device connecting the first ground in series.

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