WO2019080353A1

WO2019080353A1 - Position sensor and gear-shifting device

Info

Publication number: WO2019080353A1
Application number: PCT/CN2017/119274
Authority: WO
Inventors: 包月月; 费思哲; 周虎
Original assignee: 上海科世达-华阳汽车电器有限公司; 科世达（上海）管理有限公司
Priority date: 2017-10-24
Filing date: 2017-12-28
Publication date: 2019-05-02
Also published as: CN107806513A; CN107806513B

Abstract

A position sensor and a gear-shifting device. The position sensor is used for detecting an operating position of an operating component and comprises: a first detection element set (10) and a second detection element set (20) that each include at least two detection elements, and a detected body (30) that is detected by all the detection elements (11, 21) in the first detection element set (10) and the second detection element set (20) jointly. Detection areas corresponding to different relative positions of the detected body (30) are detected by all the detection elements (11, 12), so that the position sensor can output different pieces of code information, accordingly, the operating position of the operating component is detected, realizing the functions of single-point failure correction and two-point failure recognition; and the detection elements (11, 12) have physical position deviations in a relative position conversion direction, so that compared with qualifying code information recognized without physical position deviations, the qualifying code information recognized by the position sensor in a motion process of the detected body (30) is greatly reduced, thereby improving the detection efficiency.

Description

Position sensor and shifting device

This application claims the priority of the Chinese Patent Application, filed on Oct. 24, 2017, to the Chinese Patent Office, Application No. 201711003806.6, entitled "A Position Sensor and Shifting Device", the entire contents of which are incorporated herein by reference. In the application.

Technical field

The present invention relates to the field of detection technologies, and in particular, to a position sensor and a shifting device.

Background technique

With the development of modern social technology, the shifting device of the wire-controlled mode, which is included in the structurally separated operating parts of the transmission, has been put into practical use. Such a shifting device includes a position sensor that detects an operating position of the operating member, and electrically processes the detection signal of the position sensor to switch the gear position of the transmission.

In the prior art, the position sensor can only detect the single point failure condition, and neither considers the state of the position sensor during the movement of the shifting device, and there is no way to identify the failure of the two points, and when the two points fail, the The situation in which the location of the false alarm is generated may endanger the safety of the driver. Therefore, how to correct the single point failure of the position sensor, and can identify the two points of the position sensor failure, and can completely identify the position of the shifting device during the movement, avoid the situation of positional false alarms, improve reliability, is nowadays Urgent problems.

Summary of the invention

It is an object of the present invention to provide a position sensor and a shifting device for correcting a single point of failure, identifying two points of failure, and identifying the position of the shifting device during movement, avoiding positional false alarms, and improving reliability. Sex.

In order to solve the above technical problem, the present invention provides a position sensor for detecting an operation position of an operation member, including:

a first detecting element group and a second detecting element group each including at least two detecting elements, and a subject to be collectively detected by all of the detecting elements of the first detecting element group and the second detecting element group ;

Wherein the operating component corresponds to at least three of the operating positions, each of the operating positions corresponding to a relative position of the detected object and the first detecting component group and the second detecting component group;

Detecting, by each of the first detecting element group and the second detecting element group, a detection area of the object corresponding to each of the relative positions, and outputting all of the detecting elements respectively corresponding to each other The encoded information composed of the detection results;

The detecting element included in each of the first detecting element group and the second detecting element group has a physical position deviation in the relative position switching direction, so that the detection areas corresponding to all the detecting elements are converted when the relative position is switched The time is different.

Optionally, when the operating component corresponds to the five operating positions, the first detecting component group and the second detecting component group each include four detecting components, and the detected object includes four rows. 6 columns of 24 said detection areas;

Wherein, when the current operating position changes to an adjacent one of the operating positions, the current relative position changes to an adjacent one of the relative positions, and the detected object is opposite to the first detecting component The group and the second detecting element group are displaced 1 column to the left or right;

The detection regions corresponding to the two detection elements of the first detection element group and the second detection element group in each of the relative positions are offset from the other two detection elements in the row direction. shift;

a minimum Hamming distance between the encoded information corresponding to each of the relative positions is 4, and a minimum between the encoded information corresponding to each of the relative positions corresponding to the first detecting element group or the second detecting element Hamming distance is 2;

The first detecting element group and the second detecting element group in each of the relative positions correspond to the two columns of the detection areas of the object to be detected.

Optionally, each of the first detecting element group and the second detecting element group in each of the relative positions corresponds to one column of the detecting area of the object to be detected.

Optionally, the object to be detected is specifically a magnetic plate; wherein each of the detection regions in the magnetic plate has a corresponding magnetic polarity.

Optionally, the first detecting component group is connected to the first power source, and the second detecting component group is connected to the second power source.

Furthermore, the present invention provides a shifting device comprising: an operating member and a position sensor according to any of the above.

The present invention provides a position sensor for detecting an operating position of an operating member, comprising: a first detecting element group and a second detecting element group each including at least two detecting elements, and a first detecting element group and a first detecting element group a subject to be detected by all of the detecting elements in the detecting element group; wherein the operating member corresponds to at least three operating positions, each of the operating positions corresponding to one of the first detecting element group and the second detecting element group a detection unit that detects a corresponding detection object of each of the relative positions in the first detection element group and the second detection element group, and outputs coding information composed of detection results corresponding to the respective detection elements; The detecting element included in each of the detecting element group and the second detecting element group has a physical position deviation in the relative position switching direction, so that the time points at which the respective detecting areas of the respective detecting elements are converted at the time of the relative position switching are different;

It can be seen that the detection of the detection area corresponding to the different relative positions of the detected objects by all the detecting elements enables the position sensor to output different encoding information, thereby detecting the operating position of the operating part, realizing single point failure correction and two points. The function of failure identification; and by the setting of the physical position deviation of the detecting element in the relative position switching direction, the legal encoding information recognized by the position sensor during the movement of the object is legally recognized compared to the absence of the physical position deviation The coding information is greatly reduced, and the detection efficiency is improved.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a structural diagram of a position sensor according to an embodiment of the present invention;

2 is a schematic structural diagram of another shifting device corresponding to a position sensor according to an embodiment of the present invention;

3 is a top plan view of another position sensor according to an embodiment of the present invention;

4 is a coding information judgment table formed by each operation position of another position sensor according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a coded information of a position sensor of a position sensor according to an embodiment of the present invention when moving from a UU to a U and a position determination table thereof; FIG.

6 is a coding state of a position sensor and a position determination table thereof when the operating device of the position sensor is moved from U to N according to an embodiment of the present invention;

FIG. 7 is a diagram showing a coding situation of a position sensor and a position determination table thereof when the operating device of the position sensor is moved from N to D according to an embodiment of the present invention; FIG.

FIG. 8 is a diagram showing a coding situation of a position sensor and a position determination table thereof when the operating device of the position sensor is moved from D to DD according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1 , FIG. 1 is a structural diagram of a position sensor according to an embodiment of the present invention. The position sensor is configured to detect an operation position of an operation component, and may include:

The first detecting element group 10 and the second detecting element group 20 each including at least two detecting elements, and are collectively detected by all of the detecting elements (11 and 21) of the first detecting element group 10 and the second detecting element group 20. Subject 30;

Wherein the operating component corresponds to at least three operating positions, each operating position corresponding to a relative position of the detected object and the first detecting component group and the second detecting component group;

All of the detecting elements (11 and 21) of the first detecting element group 10 and the second detecting element group 20 detect the detection areas of the respective detected objects 30 in each of the relative positions, and output all of the detecting elements (11 and 21), respectively. Coding information composed of corresponding detection results;

The detecting element (11 or 21) included in each of the first detecting element group 10 and the second detecting element group 20 has a physical positional deviation in the relative position switching direction, so that the respective detecting elements (11 and 21) are respectively correspondingly detected when the relative position is switched. The time points for regional conversion are different.

It can be understood that the detected object 30 in the position sensor provided by the embodiment is a movable side member that can move correspondingly according to the conversion of the operating position of the operating member, such as the shifting of the detected body 30 at the operating member. On the rod; all of the detecting elements (11 and 21) may be fixed side elements, such as mounted on a substrate on the shifting device body; or may be exchanged, such as all detecting elements (11 and 21) being movable side elements, The detecting body 30 is a fixed side member as long as each operating position of the operating member can correspond to the relative position of one detected body 30 to all of the detecting elements (11 and 21), the first detecting element group 10 and the second detecting element group 20 All of the detecting elements (11 and 21) can detect the detection area of the relative position of the object 30, and output corresponding encoding information, thereby determining the operating position of the operating member, which is not limited in this embodiment.

It should be noted that the detected object 30 includes a plurality of detection regions, and each detection element (11 or 21) can detect a corresponding detection region, output a corresponding detection result, and output detection results for different detection regions. Can be different. The specific device setting of the object 30 can be set by the designer according to the practical scene and the user's requirements. For example, the object 30 can be set to a magnetic plate of different magnetic polarity for different detection areas, as long as each detecting element ( 11 or 21) Different detection results can be detected for different detection areas, and this embodiment does not impose any limitation.

Wherein, the physical positional deviation of the detecting element (11 or 21) included in each of the first detecting element group 10 and the second detecting element group 20 in the relative position switching direction can make all the detecting elements (11 and 21) when the relative position is switched. The time points at which the respective detection regions are switched are different. That is, when the relative position is switched, the detection element (11 or 21) that is closer to the next detection area in the relative position conversion direction outputs the detection result corresponding to the next detection area first, so that the next detection of the distance can be performed. The situation in which the detecting component (11 or 21) in the region is changed first is determined to be an illegal situation. The encoded information identified at this time is illegal encoded information, and the legal encoded information recognized by the position sensor during the motion of the detected object can be determined. The legal coded information identified by the absence of physical positional deviation is greatly reduced. The specific arrangement manner in which the detecting elements (11 or 21) respectively included in the first detecting element group 10 and the second detecting element group 20 have a physical positional deviation in the relative position switching direction can be set by the designer as long as the relative position can be made. The time points at which the detection regions of the respective detection elements (11 and 21) are switched are different at the time of the conversion, and this embodiment does not impose any limitation.

Specifically, the specific number setting of the detecting element 11 included in the first detecting element group 10 and the detecting element 21 included in the second detecting element group 20 and the distribution setting of the detecting area in the object 30 can be set by the designer. According to the practical scenario and the user's needs, the embodiment does not impose any limitation on this.

Preferably, all of the detecting elements 11 in the first detecting element group 10 can be connected to the first power source, and all of the detecting elements 21 in the second detecting element group 20 can be connected to the second power source, that is, the two detecting element groups are respectively used differently. The power supply prevents the position sensor from continuing to detect the operating position of the operating member when a power supply problem occurs, which improves the robustness of the position sensor.

In this embodiment, the embodiment of the present invention detects the detection area corresponding to the different relative positions of the detected objects 30 by all the detecting elements (11 and 21), so that the position sensor can output different encoding information, thereby detecting the operation. The operation position of the component realizes the function of single point failure correction and two-point failure recognition; and the detection elements (11 or 21) respectively included by the first detection element group 10 and the second detection element group 20 exist in the relative position conversion direction The physical position deviation is set so that the legal coded information recognized by the position sensor during the movement of the detected object is greatly reduced compared with the legal coded information identified by the absence of the physical position deviation, thereby improving the detection efficiency.

Based on the position sensor provided in the previous embodiment, when the operating member corresponds to five of the operating positions, the present embodiment provides another position sensor. The position sensor is configured to detect an operating position of the operating component, and may include:

a first detecting element group 10 and a second detecting element group 20 each including four detecting elements (11 and 21), comprising four rows, six columns and 24 detecting areas of the object 30;

Wherein, when the current operating position changes to an adjacent one of the operating positions, the current relative position changes to an adjacent relative position, and the detected object 30 is leftward relative to the first detecting element group 10 and the second detecting element group 20 Or shift 1 column to the right;

The two detecting elements (11 or 21) respectively included in each of the first detecting element group 10 and the second detecting element group 20 are in the row direction and the other two detecting elements (11 or 21) in each of the relative positions. There is an offset;

The minimum Hamming distance between the encoded information corresponding to each relative position is 4, and the minimum Hamming distance between the encoded information corresponding to each relative position corresponding to the first detecting element group 10 or the second detecting element 20 is 2;

The first detecting element group 10 and the second detecting element group 20 in each relative position correspond to two columns of detection areas of the subject 30.

Specifically, as shown in FIG. 2, the shifting device may include: a device body that is disposed on the vehicle body; a shift lever that is an operating member supported by the device body; and a shifting panel that the shift lever penetrates. The actual gear position beacons P, R, N, D, S are marked on the shift panel. A shift chute that guides the operation of the shift lever is formed on the shift panel, and the shift chute extends in the front-rear direction of the vehicle. The shifting direction of the shift lever is defined in this order along the UU position, U position, N position, D position, and DD position along this shift chute. The U position refers to the shift lever operating forward from the N position; the UU position refers to the shift lever from the N position to the forward position; the D position refers to the shift lever from the N position to the rear position 1 position The DD position refers to the shift lever operating two positions backward from the N position.

It can be understood that the size of the four rows and six columns of the object 30 in the present embodiment and the first detection element group 10 and the second detection element group 20 in each relative position correspond to the two columns of detection regions of the object 30. The setting can just meet the movement of the shifting lever from the UU position to the DD position along the shifting chute, which can better meet the needs of actual use, and does not use the setting manner provided by the embodiment, such as 4 rows and 7 of the detected body 30. The arrangement of the column or the column of 8 or 8 rows and 5 columns can also achieve the purpose of the embodiment, and the embodiment does not impose any limitation.

It should be noted that the specific settings of the first detecting component group 10, the second detecting component group 20, and the detected object 30 in the position sensor provided in this embodiment may be as shown in FIG. 3, and the first detection in each relative position. The four detecting elements 11 (No1 - No4) in the element group 10 and the four detecting elements 21 (No. 5 - No. 8) in the second detecting element group 20 respectively correspond to one column detection region of the subject 30, and the subject 30 A magnetic plate of corresponding magnetic polarity exists for each detection area. This embodiment does not impose any limitation on this.

FIG. 4 may be the coded information of the position sensor at different operating positions according to the case of the magnetic plate design of FIG. 3. The code information of the position sensor at the UU position is 10100011, the code information of the position sensor at the U position is 00110110, the code information of the position sensor at the N position is 01101100, and the code information of the position sensor at the D position is 11001001, DD position The coded information of the position sensor at the time is 10011111. According to the coded information, the minimum Hamming distance between the respective operation positions is 4, and the minimum Hamming distance between the coded information corresponding to each relative position of the first detection element group 10 or the second detection element 20 is 2 . When the first detecting element group 10 and the second detecting element 20 are respectively connected to one power source, even if one power source fails, the remaining first detecting element group 10 or second detecting element 20 sensor has one detecting element (11 or 21) In the case of a single point of failure, the system can still recognize the single point failure of this detection element (11 or 21).

Fig. 5 is a view showing the case of the coded information of the position sensor when the operating device moves from the UU to the U and its position determination table. As can be seen from the figure, when the operation device moves from UU to U, the detection elements No. 2, No. 3, No. 5, No. 7 are illegal, and some combinations of detection elements No. 1, No. 4, No. 6, No. 8 are legal. Since position sensor No.4 and No.8 will change in priority to No.1 and No.6, the combination of No.1, No.4, No.6 and No.8 will be in the following five cases: No4 or No.8, No.4 and No.8, No.4, No.8 and No.1 or No.1 No4No8No6. When the position sensor No. 4 or No. 8 changes, the position is determined as UU; when the position sensors No. 4 and No. 8 are changed, the position is judged as Pending, and the SBW ECU (wire-controlled steering system) needs other determinable sampling positions. The information can accurately know the position of the current operating device; when the position sensors No. 4, No. 8 and No. 1 or No. 4, No. 8 and No. 6 change, the position is determined to be U. In other cases, the position sensor fails in a single point, such as the illegal position sensor No. 2 or No. 3 or No. 5 or No. 7 in the case of single point failure or the position sensor No1 or No. 6 that cannot be caused by the normal movement. Can be corrected to the location of the UU. In addition to the situation where the position is judged as the Pending position during the legal movement, the other two-point position sensor failure can be recognized immediately, and the position is judged as error.

Fig. 6 is a diagram showing the encoding of the position sensor when the operating device is moved from U to N and its position determination table. As can be seen from the figure, when the operating device moves from U to N, the change of position sensor No. 1, No. 3, No. 6, No. 8 is illegal, and some combinations of position sensors No. 2, No. 4, No. 5, No. 7 are legal. Since position sensor No.4 and No.7 will change in priority to No.2 and No.5, the combination of No.2, No.4, No.5 and No.7 in the movement will be the following five types: No.4 or No.7, No.4, No.4, No.4, No.7, No. No7 and No5. When the position sensor No. 4 or No. 7 changes, the position is determined as U. When the position sensor No. 4 and No. 7 are changed, the position is judged as Pending. At this time, the SBW ECU needs other determinable sampling position information to accurately know the current operating device. The position is determined as N when the position sensors No. 4, No. 7 and No. 2 or No. 4, No. 7 and No. 5 are changed. In other cases, the position sensor fails in a single point, such as the illegal position sensor No1 or No3 or No6 or No8 single point failure or the position sensor No2 or No5 which cannot be caused by normal movement, the position determination is Can be corrected to the position of U. In addition to the situation where the position is judged as Pending during the legal movement, there is also a case where the No1 and No6 position sensors fail at two points, and the position is judged as Pending. At this time, the SBW ECU also needs other determinable sampling position information. If the No.1 and No6 position sensors fail to exist at two points, they will definitely be recognized. The failure of the other two-point position sensor can be recognized immediately, and the position is judged as error.

Fig. 7 is a diagram showing the encoding of the position sensor when the operating device is moved from N to D and its position determination table. As can be seen from the figure, when the operating device moves from N to D, the change of position sensor No. 2, No. 4, No. 5, No. 7 is illegal, and some combinations of position sensors No. 1, No. 3, No. 6, No. 8 are legal. Since position sensor No. 3 and No. 8 will change in priority to No.1 and No.6, the combination of No.1, No.3, No.6 and No.8 in the course of movement will be the following five cases: No.3 or No.8, No.3 and No.8, No.3, No.8 and No.1 or No. No.3, No.8 and No.6. When the position sensor No. 3 or No. 8 is changed, the position is determined to be N. When the position sensors No. 3 and No. 8 are changed, the position is determined as Pending. At this time, the SBW ECU needs other determinable sampling position information to accurately know the current operating device. The position is determined as D when the position sensors No. 3, No. 8 and No. 1 or No. 3, No. 8 and No. 6 are changed. In other cases, the position sensor fails in a single point, such as the illegal position sensor No. 2 or No. 4 or No. 5 or No. 7 in the case of single point failure or the position sensor No1 or No. 6 that cannot be caused by the normal movement. Can be corrected to the position of N. In addition to the case where the position is judged as Pending during the legal movement, there is also a case where No2 and No5 position sensors fail at two points, and the position is judged as Pending. At this time, the SBW ECU also needs other determinable sampling position information. If the No2 and No5 position sensors still have two points of failure, they will be recognized. The failure of the other two-point position sensor can be recognized immediately, and the position is judged as error.

Figure 8 is a diagram showing the encoding of the position sensor and its position determination table when the operating device moves from D to DD. As can be seen from the figure, when the operating device moves from D to DD, the change of position sensor No. 1, No. 3, No. 5, No. 8 is illegal, and some combinations of position sensors No. 2, No. 4, No. 6, No. 7 are legal. Since position sensor No.4 and No.7 will change in priority to No.2 and No.6, the combination of No.2, No.4, No.6 and No.7 in the movement will be the following five cases: No.4 or No.7, No.4 and No.7, No.4, No.7 and No.2 or No.2 or No. No4, No7 and No6. When the position sensor No. 4 or No. 7 changes, the position is judged as D. When the position sensor No. 4 is changed, the position is judged as Pending. At this time, the SBW ECU needs other determinable sampling position information to accurately know the position of the current operating device. When the position sensors No. 4, No. 7 and No. 2 or No. 4, No. 7, and No. 6 are changed, the position is determined to be DD. In other cases, the position sensor fails in a single point, such as the illegal position sensor No.1 or No3 or No5 or No8 single point failure or the position sensor No2 or No6 which cannot be caused by normal movement, the position determination is Can be corrected to the position of D. In addition to the case where the position is judged as Pending during the legal movement, there is also a case where No. 1 and No6 position sensors fail at two points, and the position is judged as Pending. At this time, the SBW ECU also needs other determinable sampling position information. If No1 and No6 position sensors still have two points of failure, they can be identified. The failure of the other two-point position sensor can be recognized immediately, and the position is judged as error.

In the embodiment of the present invention, the size of the four rows and six columns of the detected object 30 and the first detecting element group 10 and the second detecting element group 20 in each relative position correspond to the two columns of detection regions of the detected object 30. The setting can just meet the shifting lever from the UU position to the DD position along the shifting chute, which can better meet the needs of actual use.

In addition, an embodiment of the present invention further provides a shifting device comprising: an operating component and a position sensor as provided in any of the above embodiments.

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the shifting device disclosed in the embodiment, since it corresponds to the position sensor disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the method part.

The position sensor and the shifting device provided by the present invention have been described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, and the description of the above embodiments is only to assist in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

A position sensor, characterized in that the operating position for detecting an operating component comprises:

a first detecting element group and a second detecting element group each including at least two detecting elements, and a subject to be collectively detected by all of the detecting elements of the first detecting element group and the second detecting element group ;

Wherein the operating component corresponds to at least three of the operating positions, each of the operating positions corresponding to a relative position of the detected object and the first detecting component group and the second detecting component group;

Detecting, by each of the first detecting element group and the second detecting element group, a detection area of the object corresponding to each of the relative positions, and outputting all of the detecting elements respectively corresponding to each other The encoded information composed of the detection results;

The detecting element included in each of the first detecting element group and the second detecting element group has a physical position deviation in the relative position switching direction, so that the detection areas corresponding to all the detecting elements are converted when the relative position is switched The time is different.
The position sensor according to claim 1, wherein said first detecting element group and said second detecting element group each comprise four said detections when said operating member corresponds to five said operating positions An element, the object to be detected comprises 4 rows, 6 columns and 24 of the detection regions;

Wherein, when the current operating position changes to an adjacent one of the operating positions, the current relative position changes to an adjacent one of the relative positions, and the detected object is opposite to the first detecting component The group and the second detecting element group are displaced 1 column to the left or right;

The detection regions corresponding to the two detection elements of the first detection element group and the second detection element group in each of the relative positions are offset from the other two detection elements in the row direction. shift;

a minimum Hamming distance between the encoded information corresponding to each of the relative positions is 4, and a minimum between the encoded information corresponding to each of the relative positions corresponding to the first detecting element group or the second detecting element Hamming distance is 2;

The first detecting element group and the second detecting element group in each of the relative positions correspond to the two columns of the detection areas of the object to be detected.
The position sensor according to claim 2, wherein each of said first detecting element group and said second detecting element group in each of said relative positions corresponds to one column of said detecting area of said object to be detected .
The position sensor according to any one of claims 1 to 3, wherein the object to be detected is specifically a magnetic plate; wherein each of the detection regions of the magnetic plate has a corresponding magnetic polarity.
The position sensor according to any one of claims 1 to 3, wherein the first detecting element group is connected to a first power source, and the second detecting element group is connected to a second power source.
A shifting device comprising: an operating member and a position sensor according to any one of claims 1 to 5.