Automobile gear detection system and method

Abstract

The invention discloses an automobile gear detection system which comprises a gear support, a swing rod, an automobile gear rod, a shell assembly and a main control module, and the shell assembly comprises a shell, a Hall element, a radial magnetizing magnet, a rotating unit and a torsional spring; the shell is fixed on the gear bracket; the radial magnetizing magnet is fixed on the rotating unit; the Hall component is arranged opposite to the radial magnetizing magnet and is electrically connected with the main control module; the swing rods comprise the first swing rod and the second swing rod, one end of each swing rod is fixedly connected with the rotating unit in the corresponding shell assembly, and the other end of each swing rod abuts against the automobile gear lever through a torsional spring arranged on the rotating unit in a sleeving mode in the corresponding shell assembly. A gear-signal relation table used for representing the corresponding relation between each gear and the first electric signal and the corresponding relation between each gear and the second electric signal are stored in the main control module. The invention further discloses an automobile gear detection method corresponding to the system. Through the innovative structural design, the gear detection and recognition accuracy is higher, the reliability is higher, and the gear detection and recognition device can be suitable for different vehicle types.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile gear position detection, and in particular to an automobile gear position detection system and method. Background Art

[0002] With the development of automobile technology and the progress of society, cars have begun to enter Chinese families and are growing rapidly. Non-professional drivers will account for an increasing proportion. The operating level of non-professional drivers directly affects traffic safety. The traditional method of training drivers is time-consuming and laborious. Therefore, in recent years, the use of car robot coaches to train drivers for driving tests and test evaluation has received more and more attention. Whether in driving test training or driving test evaluation, the detection and identification of car gears are indispensable.

[0003] At present, the main methods of automobile gear detection are: 1) using infrared photoelectric switches with specially structured light shielding plates for detection; 2) designing circuits to infer gear information by detecting the position of the transmission gear; 3) using specially structured gear position sensors to measure gear information, where the sensor is a fan-shaped inductor sensor; 4) using on-board diagnostic technology to read gear information from the vehicle diagnostic port. However, the above detection methods all have problems such as complex detection structure, inconvenient vehicle modification and installation, and high technical costs. Summary of the invention

[0004] In view of the above technical problems, the present invention provides an automobile gear position detection system with simple structure, convenient installation and accurate detection, and an automobile gear position detection method based on the automobile gear position detection system.

[0005] To achieve the above object, the present invention adopts the following technical solution:

[0006] Scheme 1 discloses a vehicle gear detection system, including a gear bracket, a rocker arm, a vehicle gear lever, a shell assembly and a main control module; the rocker arm includes a first rocker arm and a second rocker arm arranged in a cross shape; the shell assembly has two, which are respectively connected to the first rocker arm and the second rocker arm; the gear bracket includes a connecting portion, and the connecting portion has two pairs of mounting holes with different hole spacings and heights; the shell assembly includes a shell, a Hall element, a radially magnetized magnet, a rotating unit and a torsion spring; the shell is fixed on the gear bracket; the radially magnetized magnet is fixed on the rotating unit; the Hall element is arranged opposite to the radially magnetized magnet and is electrically connected to the main control module; one end of the rocker arm is fixedly connected to the rotating unit in the corresponding shell assembly, and the other end is close to the vehicle gear lever through the torsion spring sleeved on the rotating unit in the corresponding shell assembly; the main control module stores a gear-signal relationship table, and the gear-signal relationship table is used to indicate the corresponding relationship between each gear and the first electrical signal and the second electrical signal output by the Hall element corresponding to the first rocker arm and the second rocker arm.

[0007] As an optional scheme, the rotating unit includes a shaft retaining ring, a bearing and a rotating shaft, the bearing is sleeved on the rotating shaft and limited by the shaft retaining ring; the rotating shaft includes a front part, a middle part and a rear part of the shaft; the rear end face of the rotating shaft is provided with a groove for installing a radially magnetized magnet, and the front end face is provided with a fixing hole for inserting a rocker rod; the fixing hole extends from the front part of the shaft to the middle part of the shaft, and the middle part of the shaft is circumferentially provided with a plurality of screw holes connected to the fixing hole; the rear part of the shaft is provided with a limiting groove for installing the shaft retaining ring; the housing assembly also includes a set screw installed in the screw hole in the middle part of the rotating shaft.

[0008] As an optional solution, the shell has a first cavity and a second cavity that are interconnected; the Hall element is arranged in the first cavity; the rotating unit is arranged in the second cavity; the first cavity is also provided with a wire hole connected to the outside, and the Hall element is electrically connected to the main control module through a signal line passing through the wire hole.

[0009] As an optional solution, the rotating shaft is a variable diameter structure, and the diameters of the front part, the middle part and the rear part of the shaft decrease successively.

[0010] As an optional solution, the torsion spring includes a torsion spring body and hooks and positioning ends at both ends of the torsion spring body; the front part of the shaft and part of the middle part of the shaft extend out of the shell, the torsion spring body is sleeved on the protruding part of the middle part of the shaft, and the hook is hooked on the rocker arm; a slot is provided at the bottom of the shell for fixing the positioning end of the torsion spring.

[0011] As an optional solution, the rocker arm is an approximately Z-shaped structure, including a long rod and a short rod arranged in parallel, and a connecting rod for connecting the long rod and the short rod; the short rod is inserted into the housing assembly and fixedly connected to the rotating unit, and the long rod is close to the vehicle gear lever.

[0012] As an optional solution, the gear bracket includes a base plate, a connecting plate and a connecting portion; the connecting plate is arranged vertically to the base plate, and the connecting portion is arranged at the end of the connecting plate; the connecting portion has four connecting ends, and each connecting end is provided with a mounting hole; two groups of through holes are provided on the base plate, and the shell is fixed to the base plate by self-tapping screws installed in the through holes.

[0013] As an optional solution, the gear bracket is formed in one piece by bending sheet metal.

[0014] As an optional solution, the shell includes an upper shell and a lower shell that are used together; the shell is fixed to the gear bracket by self-tapping screws installed in the through hole and penetrating the upper shell and the lower shell.

[0015] Solution 2 discloses a vehicle gear position detection method, based on the vehicle gear position detection system described in Solution 1 and any one of the optional solutions, comprising:

[0016] When the car shifts gears, the car gear lever drives the first swing arm and the second swing arm to rotate, thereby driving the corresponding rotating unit and the radial magnetized magnet to rotate, so that the magnetic attraction of the radial magnetized magnet on the Hall element changes;

[0017] The Hall elements corresponding to the first swing rod and the second swing rod respectively convert the magnetic attraction force into a first electrical signal and a second electrical signal and send them to the main control module;

[0018] The main control module receives the first electrical signal and the second electrical signal, and searches for corresponding gear information in a pre-established gear-signal relationship table to identify the current gear position of the vehicle gear lever.

[0019] The present invention has the following beneficial effects:

[0020] (1) The present invention presses two rocker arms against the automobile gear lever through a torsion spring, determines the inclination angle of the automobile gear lever in two vertical directions through a mechanical structure, and identifies the current gear position of the automobile gear lever based on a pre-established gear position-information relationship table, thereby achieving higher recognition accuracy and greater reliability.

[0021] (2) The automobile gear position detection system disclosed in the present invention has a gear position bracket which is made of bent sheet metal and is responsible for installing the housing assembly. It is also equipped with two sets of mounting holes with different spacings. The gear position detection device can be installed on the mounting plane at the bottom of the gear lever of automobiles of different models using only two screws, and has high applicability.

[0022] (3) The present invention can ensure the accuracy of gear position detection and also has the advantages of simple structure, easy installation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the automobile gear position detection system (excluding the main control module) disclosed in an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of an exploded view of the automobile gear position detection system (excluding the main control module) disclosed in an embodiment of the present invention.

[0025] Figure 3 It is an exploded view of the housing assembly disclosed in the embodiment of the present invention.

[0026] Figure 4 It is a three-dimensional diagram of the gear bracket disclosed in the embodiment of the present invention.

[0027] Figure 5 It is a schematic diagram of the internal structure of the shell assembly disclosed in the example of the present invention.

[0028] Figure 6 It is a cross-sectional view of the housing assembly disclosed in the example of the present invention. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, if there are terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", "left", "right", "top", "bottom", "front", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "include" and "have" and any variations thereof in the present invention are intended to cover non-exclusive inclusions, but may include other units that are not clearly listed or inherent to these products or devices. In addition, if there are terms such as "first" and "second", they are used to distinguish similar objects, and are not necessarily used to describe a specific order or relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0031] Combination Figures 1 to 6 As shown, the embodiment of the present invention discloses a vehicle gear position detection system which mainly includes a gear position bracket 1, a left swing arm 2, a right swing arm 3, a vehicle gear lever 4, a housing assembly 5 and a main control module. The main control module mainly includes a controller and a memory.

[0032] The gear bracket 1 is arranged at the bottom of the automobile gear lever 4 and is fixedly connected to the mounting plane at the bottom of the automobile gear lever. Figure 4 As shown, the gear bracket 1 mainly includes a base plate 11, a connecting plate 12 and a connecting portion 13, which can be formed in one piece by bending sheet metal. Among them, the base plate 11 is an approximately L-shaped structure, and two groups of through holes 14 are provided on the base plate 11 for installing the housing assembly 5. The connecting plate 12 is arranged perpendicular to the base plate 11, and the connecting portion 13 is fixed to the end of the connecting plate 12 and arranged parallel to the base plate 11. The connecting portion 13 has four connecting ends, and each connecting end is provided with a mounting hole. Among them, the two outer mounting holes have the same height, which is a pair, called mounting holes 151; the two inner mounting holes have the same height, which is another pair, called mounting holes 152. Through these two pairs of mounting holes with different hole spacings and heights, it can be adapted to the use of different types of car gear levers of different models.

[0033] When installing and using, the soft cover outside the automobile gear lever 4 is removed, and the automobile gear lever 4 inside and the mounting plane at the bottom of the automobile gear lever can be seen. The gear bracket 1 is fixedly connected to the mounting plane at the bottom of the automobile gear lever by the self-tapping screws installed in the mounting hole 151 or the mounting hole 152; if disassembly is required, the self-tapping screws can be unscrewed. In this way, the automobile gear position detection system is easy to disassemble and assemble, and convenient for maintenance.

[0034] Combination Figure 1 and Figure 2 As shown, the left swing rod 2 and the right swing rod 3 are collectively referred to as swing rods. Taking the left swing rod 2 as an example, the left swing rod 2 is an approximately Z-shaped structure, including a long rod 21 and a short rod 22 arranged in parallel, and a connecting rod 23 for connecting the long rod 21 and the short rod 22. The long rod 21 is closely attached to the automobile gear lever 4 through a torsion spring, and the short rod 22 is fixed in the housing assembly 5. The right swing rod 3 is similar in structure to the left swing rod 2, and also includes a long rod 31, a short rod 32 and a connecting rod 33. Due to the difference in their positions, the main difference is that the connecting rod 33 of the right swing rod 3 is shorter. The left swing rod 2 and the right swing rod 3 are respectively fixed to the front ends of the two housing assemblies 5, arranged in a cross shape, and both are closely attached to the automobile gear lever 4.

[0035] like Figure 2 and Figure 3 As shown, the housing assembly 5 includes a lower housing 51, an upper housing 52, a Hall element 53, a radial magnetized magnet 54, a shaft retaining ring 55, a bearing 56, a rotating shaft 57, a set screw 58 and a torsion spring 59, wherein the lower housing 51 and the upper housing 52 together constitute a complete housing, which can be fixed on the gear bracket 1 by a self-tapping screw installed in the through hole 14 and passing through the upper and lower housings. The rotating shaft 57 is a variable diameter structure, the diameter of the front part of the shaft is greater than the diameter of the middle part of the shaft, and the diameter of the middle part of the shaft is greater than the diameter of the rear part of the shaft. A groove 571 is provided on the rear end face of the rotating shaft 57 for placing the radial magnetized magnet 54; a fixing hole 572 is provided on the front end face of the rotating shaft 57, and the fixing hole 572 extends from the front part of the shaft to the middle part of the shaft for inserting a swing rod. Four screw holes 573 connected with the fixing hole 572 are provided in the circumferential direction of the middle part of the shaft for installing the set screw 58; a circle of limiting grooves 574 is provided at the rear part of the shaft for installing the shaft retaining ring 55. During installation, the bearing 56 is first sleeved on the rear of the shaft, and then the shaft retaining ring 55 is inserted into the limiting groove 574 to limit the rotating shaft 57; the radial magnetized magnet 54 can be fixed in the groove 571 by gluing. Thus, the bearing 56, the shaft retaining ring 55 and the rotating shaft 57 form a whole, which can be called a rotating unit, and the radial magnetized magnet 54 is fixed at the rear end of the rotating unit.

[0036] A groove 511 and a groove 521 are respectively provided at the tail of the lower shell 51 and the upper shell 52. When the groove 511 and the groove 521 are matched, a first cavity is formed. The shape and size of the first cavity can match the Hall element 53, so that the Hall element 53 can be placed in the first cavity. A groove 512 and a groove 522 are provided in the middle of the lower shell 51 and the upper shell 52. When the groove 511 and the groove 521 are matched, a second cavity is formed for placing the rotating unit. It should be noted that after the rotating unit is installed, the rotating shaft 57 partially extends out of the second cavity, and the maximum diameter of the second cavity can just clamp the bearing 56, so that the bearing 56 is relatively fixed and only the rotating shaft rotates. The first cavity and the second cavity are connected, so that the Hall element 53 installed in the first cavity and the radially magnetized magnet 54 on the rotating unit installed in the second cavity are arranged relative to each other. The lower shell 51 and the upper shell 52 are also provided with notches, so that after the lower shell 51 and the upper shell 52 are matched, a wire hole 531 connected to the outside is also provided at the position of the first cavity for passing the signal line. In other embodiments, the wire hole 531 can also be separately opened on the upper shell 51 or the lower shell 52. When in use, the Hall element 53 is subjected to the magnetic attraction of the radial magnetized magnet 54, and the magnetic attraction is converted into an electrical signal and transmitted to the main control module through the signal line passing through the wire hole 531. A card slot 513 is also provided at the bottom of the lower shell 51 for fixing the torsion spring 59.

[0037] The torsion spring 59 is mainly used to provide torque to keep the swing arm always close to the automobile gear lever 4. The torsion spring 59 is mainly composed of a torsion spring body 591 and hooks 592 and positioning ends 593 at both ends of the torsion spring body 591. Taking the left swing arm 2 and its corresponding housing assembly 5 as an example, when installing, first insert the short rod 22 of the left swing arm 2 into the fixing hole 572 on the front end surface of the rotating shaft 57, and then tighten and fix it through the set screws 58 in the four screw holes 573; then combine the lower housing 51 and the upper housing 52 to cover, forming a whole, that is, the housing; after the upper and lower housings are combined, the rotating shaft 57 partially extends out of the housing, and the middle part and the front part of the shaft extend out of the housing. The positioning end 593 of the torsion spring 59 is clamped in the clamping groove 513 at the bottom of the lower shell 51, the torsion spring body 591 is sleeved on the middle part of the rotating shaft 57, and the hook 592 of the torsion spring 59 is hooked on the left swing arm 2; then the shell assembly is fixed on the gear bracket 1 through the self-tapping screws installed at the through hole 14 on the gear bracket 1, and at the same time, the self-tapping screws that penetrate through also press the upper and lower shells together. At this time, the left swing arm 2 is pressed against the middle part of the automobile gear lever 4 through the torsion spring 59; then the right swing arm 3 is installed in the same way.

[0038] The automobile gear position detection system of the present invention can be used to identify the gear position information when the car is driving. When the car is in different gears, the automobile gear lever 4 is at different angles, driving the left swing rod 2 and the right swing rod 3 leaning thereon to rotate, thereby driving the two rotating shafts 57 to rotate, causing the radial magnetized magnet 54 at the tail of the rotating shaft 57 to rotate accordingly, and the Hall element 53 is changed by the magnetic attraction of the radial magnetized magnet 54, and the Hall element 53 converts the magnetic attraction into an electrical signal and sends it to the main control module through the signal line. It can be understood that the rotation angle of the radial magnetized magnet 54 corresponds to the output electrical signal of the corresponding Hall element 53, so the gear position of the automobile gear lever can be judged by the output electrical signal of the Hall element 53.

[0039] After the gear detection device is installed, when it is used for the first time (i.e., the debugging stage), the automobile gear lever 4 is moved to each gear position, and the electrical signals given by the two Hall elements 53 in each gear position are recorded, and the corresponding relationship between the gear position and the electrical signal is stored in the main control module. For example, after the automobile gear detection system is installed, the automobile gear lever 4 is first pushed to the R gear, and the Hall values ​​of the left swing rod 2 and the right swing rod 3 are read as 850 and 700 respectively; the gear position is continued to be pushed to the 1st gear, and the Hall values ​​of the left swing rod 2 and the right swing rod 3 are 870 and 860 respectively; the gear position is then pushed to the 3rd gear, and the Hall values ​​of the left swing rod 2 and the right swing rod 3 are 890 and 970 respectively, and the rest of the gear positions are deduced in the same way, and the two Hall values ​​corresponding to each gear position are recorded. In order to improve the adaptability of the system, each gear position can be tested multiple times during the debugging stage to obtain the Hall value range of the left swing rod 2 and the right swing rod 3 when the automobile gear lever 4 is pushed to the gear position. After debugging is completed, in actual use, after the main control module receives the electrical signal sent by the Hall element 53, it compares the real-time signals output by the two Hall elements 53 with the numerical range of each gear position tested to determine the gear position of the current automobile gear lever 4, thereby achieving the purpose of identifying the automobile gear position according to the output signal of the Hall element 53. It is worth noting that the present invention combines the output electrical signals of the two Hall elements 53 to comprehensively judge the current gear position, which can further increase the effectiveness and accuracy of identification.

[0040] Furthermore, another embodiment of the present invention discloses a method for detecting a gear position of an automobile. The detection method can be implemented based on the automobile gear position detection system disclosed in the above embodiment.

[0041] During normal use, the main control module obtains the electrical signal output by the Hall element 53 corresponding to the left sway bar 2 and the right sway bar 3 in the vehicle gear detection system in the current gear (referred to as "left and right output signal"), and searches for the corresponding gear based on the pre-established gear-signal relationship table, thereby realizing vehicle gear recognition.

[0042] The gear position-signal relationship table is usually established in the debugging stage, and is mainly realized in the following manner: the gear lever 4 of the automobile is moved to one of the gear positions, and the main control module receives and records the left and right output signals under the gear position; the above operation is repeated until the main control module obtains the left and right output signals corresponding to each gear position, thereby forming a gear position-signal relationship table and storing it in the memory of the main control module;

[0043] As a preferred embodiment, the above process can be repeated multiple times, and in the resulting gear-signal relationship table, each gear corresponds not to a specific pair of values, but to a pair of reasonable value ranges, thereby increasing the effectiveness of recognition.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A vehicle gear position detection system, It is characterized in that It includes a gear bracket, a rocker arm, a car gear lever, a housing assembly and a main control module; The swing rod comprises a first swing rod and a second swing rod arranged in a cross shape; the housing assembly comprises two, which are respectively connected to the first swing rod and the second swing rod; The gear bracket includes a connecting portion, and the connecting portion has two pairs of mounting holes with different hole spacing and heights; the housing assembly includes a housing, a Hall element, a radial magnetized magnet, a rotating unit and a torsion spring; the housing is fixed on the gear bracket; the radial magnetized magnet is fixed on the rotating unit; the Hall element and the radial magnetized magnet are arranged opposite to each other and are electrically connected to the main control module; One end of the swing rod is fixedly connected to the rotating unit in the corresponding housing assembly, and the other end is closely attached to the vehicle gear lever through a torsion spring sleeved on the rotating unit in the corresponding housing assembly; The main control module stores a gear position-signal relationship table, which is used to indicate the corresponding relationship between each gear position and the first electrical signal and the second electrical signal output by the Hall element corresponding to the first swing arm and the second swing arm.

2. The vehicle gear position detection system as claimed in claim 1, It is characterized in that The rotating unit comprises a shaft retaining ring, a bearing and a rotating shaft, wherein the bearing is sleeved on the rotating shaft and is limited by the shaft retaining ring; The rotating shaft comprises a front part, a middle part and a rear part; a groove for installing a radial magnetized magnet is provided on the rear end face of the rotating shaft, and a fixing hole for inserting a swing rod is provided on the front end face; the fixing hole extends from the front part of the shaft to the middle part of the shaft, and a plurality of screw holes in communication with the fixing hole are provided in the circumferential direction of the middle part of the shaft; a limiting groove for installing a shaft retaining ring is provided on the rear part of the shaft; The housing assembly also includes a set screw installed in a screw hole in the middle of the rotating shaft.

3. The vehicle gear position detection system as claimed in claim 2, It is characterized in that The shell has a first cavity and a second cavity that are interconnected; the Hall element is arranged in the first cavity; the rotating unit is arranged in the second cavity; the first cavity is also provided with a wire hole that is connected to the outside, and the Hall element is electrically connected to the main control module through a signal line passing through the wire hole.

4. The vehicle gear position detection system as claimed in claim 2, It is characterized in that The rotating shaft is a variable diameter structure, and the diameters of the front part, the middle part and the rear part of the shaft decrease in sequence.

5. The vehicle gear position detection system as claimed in claim 2, It is characterized in that The torsion spring includes a torsion spring body and hooks and positioning ends at both ends of the torsion spring body; the front part of the shaft and part of the middle part of the shaft extend out of the shell, the torsion spring body is sleeved on the protruding part of the middle part of the shaft, and the hook is hooked on the rocker arm; a slot for fixing the positioning end of the torsion spring is provided at the bottom of the shell.

6. The vehicle gear position detection system according to any one of claims 1 to 5, It is characterized in that The swing rod is an approximately Z-shaped structure, including a long rod and a short rod arranged in parallel, and a connecting rod for connecting the long rod and the short rod; the short rod is inserted into the housing assembly and fixedly connected to the rotating unit, and the long rod is close to the vehicle gear lever.

7. The vehicle gear position detection system according to any one of claims 1 to 5, It is characterized in that The gear bracket includes a base plate, a connecting plate and a connecting portion; the connecting plate is arranged vertically to the base plate, and the connecting portion is arranged at the end of the connecting plate; the connecting portion has four connecting ends, and each connecting end is provided with a mounting hole; two groups of through holes are provided on the base plate, and the shell is fixed to the base plate by self-tapping screws installed in the through holes.

8. The automobile gear position detection system as claimed in claim 7, It is characterized in that The gear bracket is integrally formed by bending sheet metal.

9. The vehicle gear position detection system according to any one of claims 1 to 5, It is characterized in that The housing comprises an upper housing and a lower housing which are used together; the housing is fixed to the gear support by self-tapping screws which are installed in the through hole and pass through the upper housing and the lower housing.

10. A method for detecting a vehicle gear position, It is characterized in that The automobile gear position detection system according to any one of claims 1 to 9 comprises: When the car shifts gears, the car gear lever drives the first swing arm and the second swing arm to rotate, and then drives the corresponding rotating unit and the radial magnetized magnet to rotate, so that the Hall element is affected by the magnetic attraction of the radial magnetized magnet and changes; the Hall elements corresponding to the first swing arm and the second swing arm convert the magnetic attraction into the first electrical signal and the second electrical signal respectively and send them to the main control module; The main control module receives the first electrical signal and the second electrical signal, and searches for corresponding gear information in a pre-established gear-signal relationship table to identify the current gear position of the vehicle gear lever.

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