CN116067682A - State detection assembly and detection method for automobile suspension system - Google Patents
State detection assembly and detection method for automobile suspension system Download PDFInfo
- Publication number
- CN116067682A CN116067682A CN202310088940.XA CN202310088940A CN116067682A CN 116067682 A CN116067682 A CN 116067682A CN 202310088940 A CN202310088940 A CN 202310088940A CN 116067682 A CN116067682 A CN 116067682A
- Authority
- CN
- China
- Prior art keywords
- displacement
- suspension system
- detection
- state
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/04—Suspension or damping
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The application provides a state detection assembly and a state detection method of an automobile suspension system, comprising the following steps: a support frame having a first space; the rubber main spring is arranged in the space, a second space is arranged in the space, and a first opening is formed in the side wall of the rubber main spring; the bracket arm has a first end and a second end; the first end is connected with the first opening; the second end is connected with the engine; a scale mark area is arranged on one side of the top of the second end, which is close to the support frame; the suspension system has a free state, a static compression state and a dynamic change state; the detection assembly includes: the displacement detection part is arranged on one side of the support frame close to the second end, and the axis of the displacement detection part is arranged along the first direction; it also has a detection end; in a free state, the detection end corresponds to the initial moment of marking the scale area; in a static compression state, the device is used for detecting the displacement of the bracket arm along the second direction; the second direction is perpendicular to the first direction; the displacement detection piece and the mark scale zone are arranged, so that the state of the bracket arm can be detected, and whether the suspension part is damaged or not is judged.
Description
Technical Field
The application relates to the technical field of automobile engine suspension systems, in particular to a state detection assembly and a state detection method of an automobile suspension system.
Background
With the rapid development of the automobile industry, the requirements on the NVH performance and the whole automobile operability of the automobile are higher and higher, and the suspension system plays an increasingly important role as an important part for influencing the NVH performance. After the suspension system is assembled and loaded, the engine room is densely arranged, parts are mutually shielded, the state of the suspension part body cannot be seen, and the problems that whether the suspension part is damaged or not cannot be judged.
Disclosure of Invention
The present application is directed to the above problems, and provides a state detection assembly and a state detection method for an automotive suspension system.
First aspect:
the present application provides a status detection assembly of an automotive suspension system, the suspension system comprising:
a support frame having a first space penetrating in a first direction;
the rubber main spring is arranged in the first space; a second space is formed in the rubber main spring, and a first opening communicated with the second space is formed in the side wall of the rubber main spring;
a bracket arm having a first end and a second end; the first end enters the first opening along the first direction; the second end is connected with the engine; at least one scale marking area is arranged on one side, close to the supporting frame, of the top of the second end;
the suspension system has a free state, a static compression state and a dynamic change state;
the detection assembly includes:
the displacement detection piece is arranged on one side, close to the second end, of the support frame; the axis of the displacement detection piece is arranged along the first direction; the displacement detection piece is provided with a detection end; in a free state, the detection end corresponds to the initial moment of the marked scale area; the displacement detection member is used for detecting first displacement of the first end along a second direction under a static compression state; the second direction is perpendicular to the first direction.
According to the technical scheme provided by some embodiments of the present application, two scale marking areas are arranged on one side, close to the supporting frame, of the top of the second end; the two marked scale areas are distributed along a third direction, and the third direction is perpendicular to the first direction and the second direction;
the displacement detection parts are two; the two displacement detection pieces comprise a first detection piece and a second detection piece;
in the free state, the detection ends of the first detection piece and the second detection piece are positively corresponding to the initial scales of the marked scale areas corresponding to the detection ends of the first detection piece and the second detection piece;
the first detection piece is used for detecting second displacement of the second end along the second direction in the static compression state; the second detecting member is configured to detect a third displacement of the second end in the second direction.
According to the technical solution provided in some embodiments of the present application, the detection assembly further includes:
the pressure detection piece is arranged at the bottom of the first space; the pressure detection piece is positioned right below the rubber main spring;
in the free state, the pressure detecting member is configured to measure an initial pressure value received thereon;
the pressure detection piece is used for measuring a first pressure value born by the pressure detection piece in the static compression state;
the pressure detecting member is used for measuring a second pressure value born by the pressure detecting member in the dynamic change state.
The detection assembly further comprises:
the first operation module is configured to calculate a first rigidity deviation ratio according to the first displacement;
a second operation module configured to calculate an inclination angle according to the second displacement and the third displacement;
the first judging module is configured to judge whether the first pressure value and the second pressure value are within a pressure threshold range.
Second aspect:
the application also provides a state detection method of the automobile suspension system, which comprises the following steps:
receiving a starting signal, and acquiring the first displacement and the first pressure value, wherein the first displacement is the moving distance of the second end of the bracket arm, which is detected by the displacement detecting piece, along the second direction under the static compression state; the first pressure value is a pressure value born by the pressure detection part under the static compression state;
calculating a first stiffness deviation ratio of the suspension system according to the first displacement and the first pressure value;
when the first rigidity deviation ratio is smaller than or equal to a static rigidity threshold value, judging that the static rigidity of the suspension system meets the requirement;
and when the first rigidity deviation ratio is larger than the static rigidity threshold value, judging that the static rigidity of the suspension system does not meet the requirement.
According to the technical solutions provided in some embodiments of the present application, the detection method further includes the following steps:
receiving a starting signal, and acquiring the second displacement and the third displacement; the second displacement is a moving distance of the second end of the bracket arm, which is detected by the first detection piece, along the second direction under the static compression state; the third displacement is the moving distance of the second end of the bracket arm, which is detected by the second detection part, along the second direction under the static compression state;
calculating the inclination angle of the second end of the bracket arm relative to one side of the support frame, which is close to the second end, according to the second displacement and the third displacement;
when the inclination angle is smaller than or equal to an angle threshold value, judging that the posture of the suspension system meets the requirement; and when the inclination angle is larger than the angle threshold, judging that the posture of the suspension system is not in accordance with the requirement.
According to the technical solutions provided in some embodiments of the present application, after the second displacement and the third displacement are obtained, the method further includes the following steps:
receiving a starting signal and acquiring the second pressure value; the second pressure value is a pressure value born by the pressure detection part under the static compression state;
calculating a second stiffness deviation ratio of the suspension system based on the second displacement, the third displacement, and the second pressure value;
when the second rigidity deviation ratio is smaller than or equal to the static rigidity threshold value, judging that the static rigidity of the suspension system meets the requirement;
and when the second rigidity deviation ratio is larger than the static rigidity threshold value, judging that the static rigidity of the suspension system does not meet the requirement.
According to the technical solutions provided in some embodiments of the present application, the detection method further includes the following steps:
judging that the components of the suspension system are damaged when the first pressure value is not in the pressure threshold range;
and when the first pressure value is judged to be within the pressure threshold range, judging that the components of the suspension system normally operate.
According to the technical solutions provided in some embodiments of the present application, the detection method further includes the following steps:
judging that the components of the suspension system are damaged when the second pressure value is not in the pressure threshold range;
and when the second pressure value is judged to be within the pressure threshold range, judging that the components of the suspension system normally operate.
According to the technical solutions provided in certain embodiments of the present application, the detection method further includes: receiving a starting signal to obtain a third pressure value; the third pressure value is the pressure value born by the pressure detection part under the dynamic change state; the dynamic change state is a state presented by a suspension system in a whole vehicle motion state;
judging that the components of the suspension system normally operate when the third pressure value is within the pressure threshold range;
and when the third pressure value is not in the pressure threshold range, judging that the components of the suspension system are damaged.
Compared with the prior art, the beneficial effect of this application: the device comprises a support frame and a rubber main spring arranged in a first space of the support frame, wherein a scale area is carved on a bracket, a displacement detection piece is arranged on one side of the support frame, which is relatively close to the bracket, and the detection end of the displacement detection piece is positively corresponding to the scale area; in the use, this application is through carved with the scale mark on the bracket, is equipped with displacement detection spare in the one side that the support frame is close to the bracket relatively, and the one end of bracket is connected with support frame and rubber main spring, and the other end is connected with the automobile body, so through the measurement to the bracket position under static compression state, can judge whether the suspension part takes place to damage.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a left suspension and a right suspension according to a first embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a bracket according to a first embodiment of the present disclosure;
fig. 3 is a schematic structural diagram of a support frame according to an embodiment of the present disclosure;
fig. 4 is a flowchart of a detection method according to a second embodiment of the present application;
fig. 5 is a schematic structural diagram of a server provided in a fifth embodiment of the present application.
The text labels in the figures are expressed as:
1. a support frame; 2. a rubber main spring; 3. a bracket arm; 4. marking a scale area; 5. a displacement detecting member; 501. a first displacement detecting member; 502. a second displacement detecting member; 6. a pressure sensor.
Detailed Description
In order that those skilled in the art may better understand the technical solutions of the present application, the following detailed description of the present application is provided by way of example and illustration only, and should not be construed to limit the scope of the present application in any way.
Example 1
Referring to fig. 1-3, the present embodiment provides a status detection assembly of an automotive suspension system, the suspension system comprising:
a support frame 1, the support frame 1 having a first space penetrating in a first direction;
a rubber main spring 2, wherein the rubber main spring 2 is arranged in the first space; a second space is formed in the rubber main spring 2, and a first opening communicated with the second space is formed in the side wall of the rubber main spring 2;
a bracket arm 3, the bracket arm 3 having a first end and a second end; the first end enters the first opening along the first direction; the second end is connected with the engine; at least one scale marking area 4 is arranged on one side, close to the supporting frame 1, of the top of the second end;
the suspension system has a free state, a static compression state and a dynamic change state;
the detection assembly includes:
the displacement detection piece 5 is arranged on one side, close to the second end, of the support frame 1; the axis of the displacement detecting member 5 is arranged along the first direction; the displacement detecting member 5 has a detecting end; in the free state, the detection end corresponds to the initial moment of the marked scale area 4; the displacement detecting member 5 is configured to detect a first displacement of the first end in a second direction in the static compression state; the second direction is perpendicular to the first direction.
Specifically, in this embodiment, as shown in fig. 1, the existing suspension system structure at present includes a support frame 1, one end of the support frame 1 is connected to a vehicle body, the support frame 1 has a first space penetrating along a first direction, the first direction is parallel to an axial direction of the support frame 1 in fig. 3, and the first direction is shown in a direction denoted by a in fig. 3 in detail; the rubber main spring 2 is arranged in the first space, a second space is further arranged in the rubber main spring 2, a first opening is formed in the side wall, relatively close to the support frame 1, of the rubber main spring 2, and the first opening is communicated with the second space;
the bracket arm 3 has a first end and a second end, the first end enters the first opening along the first direction so as to be connected with the rubber main spring 2; the second end is connected with the engine; a scale marking area 4 is arranged on one side, relatively close to the support frame 1, of the top of the second end of the supporting arm 3, at least one scale marking area 4 is arranged in the scale marking area 4, scale marks arranged in the vertical direction are arranged in the scale marking area 4, initial moments are marked on the scale marks, and the readings of the scale marks gradually decrease from top to bottom; the suspension system has three states, namely a free state, a static compression state and a dynamic change state; the free state is a state when the suspension system is not loaded, the static compression state refers to a state that the suspension system is loaded and a state that the vehicle is stopped after running for a period of time, and the dynamic change state is a state that the vehicle is in the running process; the detection assembly comprises a displacement detection member 5, the displacement detection member 5 is a photoelectric sensor, the displacement detection member 5 is arranged on one side, relatively close to the second end, of the support frame 1, the displacement detection member 5 is provided with an axis, the axis of the displacement detection member 5 is arranged along the first direction, the displacement detection member 5 is provided with a detection end, the detection end faces the marked scale zone 4, namely, the displacement detection member 5 can read the reading of the scale mark in the marked scale zone 4; in the free state, the detection end corresponds to the initial moment, that is, the displacement detected by the displacement detecting member 5 at the moment is 0; in the static compression state, the displacement detecting member 5 can detect a first displacement, where the first displacement is a distance that the bracket arm 3 moves along the second direction, and the second direction is perpendicular to the first direction, and the second direction is a vertical direction in fig. 2, and is also a direction indicated by b in fig. 1.
In the use process, under the static compression state, the value detected by the displacement detection piece is 5mm, so that the bracket arm can be judged to move downwards by 5mm along the first direction, and the reason for the movement of the bracket arm is that after the suspension system is installed on a vehicle, the bracket arm moves downwards by 5mm under the influence of the gravity of other parts in the vehicle; by detecting the position of the bracket arm, the static stiffness of the suspension part can be deduced, so as to judge whether the suspension part is damaged or not, and the specific judging method is described in detail in the following embodiments.
According to the suspension device, the displacement detection piece is arranged on the support frame, the scale marks are engraved on the support arm, and the condition that the support arm is in the position under different static compression states can be obtained through detection of the displacement of the support arm, so that whether the suspension part is damaged or not can be judged according to the position of the support arm.
Further, two scale marking areas 4 are arranged on one side, close to the supporting frame 1, of the top of the second end; the two marked scale areas 4 are distributed along a third direction, and the third direction is perpendicular to the first direction and the second direction;
the displacement detecting parts 5 are two; the two displacement detectors 5 include a first detector 501 and a second detector 502;
in the free state, the detection ends of the first detection piece 501 and the second detection piece 502 are positively corresponding to the initial graduations of the marked graduation area 4 corresponding to the detection ends;
the first detecting member 501 is configured to detect a second displacement of the second end in the second direction in the static compression state; the second detecting member 502 is configured to detect a third displacement of the second end along the second direction.
Specifically, in this embodiment, two marked scale areas 4 are disposed on the bracket arm 3 at a side of the second end, which is relatively close to the support frame 1, scale lines are engraved in the two marked scale areas 4, scales of the scale lines are arranged along the second direction, the values of the scales of the scale lines gradually decrease from top to bottom, the two marked scale areas 4 are sequentially arranged along a third direction, the third direction is perpendicular to the first direction and the second direction, and the third direction is a direction c shown in fig. 1Correspondingly, two displacement detecting elements 5 are also provided, the two displacement detecting elements 5 are respectively a first detecting element 501 and a second detecting element 502, the two displacement detecting elements 5 are respectively provided with detecting ends, when the suspension system is in the free state, the detecting ends of the first detecting element 501 correspond to the initial moments of the scale marks in the marked scale areas 4 corresponding to the detecting ends, and the detecting ends of the second detecting element 502 correspond to the initial moments of the scale marks in the marked scale areas 4 corresponding to the detecting ends, namely, the first detecting element 501 and the second detecting element 502 are sequentially arranged along the third direction; when the suspension system is in the static compression state, the first displacement value read by the first detecting member 501 is X 1 mm, the second displacement value read by the second detecting member 502 is X 2 mm, and the distance X between two of said marked graduation sections 4 3 The distance between the first displacement value and the second displacement value and the distance between the two scale marks along the third direction are constant along the third direction, so that the deflection angle of the bracket arm 3 relative to the support frame 1 can be calculated, if the calculated angle is smaller than the angle threshold value, the posture of the suspension system is not changed, and if the calculated angle is larger than the angle threshold value, the posture of the suspension system is changed, so that the suspension system is unqualified, and a specific judging method is detailed in the method part.
Further, the detection assembly further comprises:
a pressure detecting member 6, wherein the pressure detecting member 6 is arranged at the bottom of the first space; the pressure detection piece 6 is positioned right below the rubber main spring 2;
in the free state, the pressure detecting member 6 is configured to measure an initial pressure value borne thereon;
the pressure detecting member 6 is used for measuring a first pressure value born by the pressure detecting member in the static compression state;
in the dynamic state, the pressure detecting member 6 is configured to measure a second pressure value received thereon.
Specifically, in this embodiment, a pressure detecting member 6 is further disposed directly under the rubber main spring 2, where the pressure detecting member 6 is located at the bottom of the first space, and in the free state, the pressure detecting member 6 may detect an initial pressure value of the suspension system; in the static compression state, the pressure detecting member 6 can detect the pressure value received by the suspension system from other components connected thereto, and in the dynamic change state, the pressure detecting member can measure a second pressure value given by other components on the suspension system, and according to the second pressure value, whether the suspension system breaks can be judged, and a specific judging method will be described in detail in the following embodiments.
The detection assembly further comprises: the first operation module is configured to calculate a first rigidity deviation ratio according to the first displacement;
a second operation module configured to calculate an inclination angle according to the second displacement and the third displacement;
the first judging module is configured to judge whether the first pressure value and the second pressure value are within a pressure threshold range.
Specifically, in this embodiment, the detection assembly further includes an electronic auxiliary diagnostic system, where the electronic auxiliary diagnostic system includes a first operation module, a second operation module, and a first judgment module that are sequentially connected, where the first operation module is configured to calculate a first stiffness deviation ratio according to the first displacement, the first operation module is connected with a second operation module, where the second operation module is configured to calculate an inclination angle according to the second displacement and the third displacement, and the second operation module is connected with a first judgment module, where the first judgment module is configured to judge whether the first pressure value and the second pressure value are within a pressure threshold range, and a specific calculation method will be described in detail in a later embodiment.
Example two
The present embodiment provides a state detection method of an automotive suspension system, which is applied to a state detection assembly of any one of the automotive suspension systems, and is executed by the state detection assembly, the method including the steps of:
s1, receiving a starting signal to obtain the first displacement, wherein the first displacement is the moving distance of the second end of the bracket arm along the second direction, which is detected by the displacement detection part, in the static compression state;
s2, receiving a starting signal, and acquiring the first pressure value; the first pressure value is a pressure value born by the pressure detection part under the static compression state;
s3, calculating a first rigidity deviation ratio of the suspension system according to the first displacement and the first pressure value;
s4, judging that the static stiffness of the suspension system meets the requirement when the first stiffness deviation ratio is smaller than or equal to a static stiffness threshold value;
and S5, judging that the static rigidity of the suspension system does not meet the requirement when the first rigidity deviation ratio is larger than the static rigidity threshold value.
Specifically, in this embodiment, for the rear suspension, after the vehicle is stopped after running for a period of time, the displacement detecting member receives the start signal, after the displacement detecting member receives the start signal, the displacement detecting member reads the current position of the bracket arm through the scale mark in the scale mark zone, so as to obtain a first displacement, where the first displacement is a displacement measured when the whole suspension system is in the static compression state, that is, after the suspension component is loaded or after the vehicle is stopped after running for a period of time, the displacement detecting member obtains a moving distance of the second end of the bracket arm in the second direction.
Meanwhile, after the pressure detecting member receives the start signal, a first pressure value is obtained and is marked as F 1 The first pressure value is the detected suspension of the suspension system in the static compression statePlacing the pressure value to which the system is subjected.
After the first displacement and the first pressure are obtained, the first operation module can calculate a first rigidity deviation ratio of the suspension system according to the first displacement and the first pressure value.
And when the first rigidity deviation ratio is smaller than or equal to a static rigidity threshold value, judging that the static rigidity of the suspension system meets the requirement.
And when the first rigidity deviation ratio is judged to be larger than the static rigidity threshold value, judging that the static rigidity of the suspension system is not satisfactory. The first rigidity deviation ratio is marked as T, and the calculation method of the first rigidity deviation ratio T is as follows:
first, a first stiffness value of the suspension is calculated:
wherein: k (K) 1 A first stiffness value for the suspension; f (F) 1 Is a first pressure value; s is S 1 Is the first displacement.
Then, the first stiffness deviation ratio is calculated from the first stiffness value:
wherein: t represents a first stiffness deviation ratio; k (K) 1 mark Representing a first standard stiffness value, i.e. a design standard stiffness value of the suspension component.
If T is less than or equal to 15 percent of K 1 mark The static rigidity of the rear suspension can be judged to be qualified;
if T>15％K 1 mark The static rigidity of the rear suspension is unqualified;
if 25% K 1 mark <T≤50％K 1 mark Then it can be concluded that the rear suspension is malfunctioning at this time;
if T >50%, then it can be concluded that the rear suspension is damaged.
Meanwhile, the first pressure value of the rear suspension is sent to the first judging module for judgment, so that whether the rear suspension is damaged or not is determined, and when the first pressure value F is judged 1 If the pressure value is not within the pressure threshold value range, judging that the rear suspension component is damaged, if the first pressure value F is judged 1 When within the pressure threshold range, the rear suspension component may operate normally.
According to the method, the scale area is carved on the bracket arm of the right suspension, the displacement of the rear suspension bracket arm and the pressure value born by the rear suspension from other parts in the vehicle can be timely acquired after the suspension system is loaded on the vehicle or the vehicle runs for a period of time, and the static rigidity of the rear suspension can be calculated according to the displacement of the rear suspension bracket arm and the corresponding pressure value, so that whether the static rigidity of the rear suspension meets the requirement or not and whether the rear suspension is damaged or not can be judged.
Then for left suspension: after the first detection part and the second detection part receive the starting signal, the current position of the bracket arm is read and is respectively a second displacement and a third displacement, and the second displacement is recorded as S 21 The third displacement is denoted as S 31 The second displacement S 21 In the stationary compression state, the first detecting member detects a distance along the second direction that the second end of the bracket arm moves, and the third displacement S 31 In order to detect the distance along the second direction of the second end of the bracket arm detected by the second detecting member in the static compression state, the distance along the third direction between the scale marks in the two scale mark areas on the bracket arm is denoted as S 21-31 According to the second displacement S 21 And said third displacement S 31 And a distance S along the third direction between the graduation marks in the two marked graduation areas 21-31 The second operation module can calculate the bracketThe first inclination angle of the second end of the arm relative to one side of the support frame, which is close to the second end, is calculated as follows:
wherein: θ 1 Representing the left suspension first tilt angle;
S 21 representing a second displacement;
S 31 representing a third displacement;
if the first inclination angle theta is judged 1 When the left suspension attitude is smaller than or equal to the angle threshold value, judging that the left suspension attitude meets the requirement;
if the first inclination angle theta is judged 1 When the left suspension attitude is larger than the angle threshold value, judging that the left suspension attitude does not meet the requirement;
after obtaining the second displacement S 21 And the third displacement S 31 After that, the pressure detecting part receives the starting signal and acquires a second pressure value, and the second pressure value is recorded as F 21 When the first judging module judges that the second pressure value F 21 If the left suspension is not within the pressure threshold range, the left suspension is judged to be damaged;
judging the second pressure value F 21 When the left suspension is within the pressure threshold range, judging that the left suspension can normally operate;
according to the second displacement S of the left suspension 21 And the third displacement S 31 And a second pressure value F 21 A second stiffness deviation ratio of the left suspension can be calculated, the second stiffness deviation ratio being calculated by T 21 The specific calculation method is as follows:
wherein: k (K) S1 A first stiffness value at a second displacement;
K S2 a first stiffness value at a third displacement;
K S1-S2 is the average first stiffness value;
the second stiffness deviation ratio
Wherein: t (T) 21 Represents a second stiffness deviation ratio;
K (S1-S2) label Representing a first standard stiffness value;
if T 21 ≤15％K (S1-S2) label The static rigidity of the left suspension can be judged to be qualified;
if T 21 >15％K (S1-S2) label The rigidity of the left suspension is not qualified;
if 25% K (S1-S2) label <T 21 ≤50％K (S1-S2) label Then it can be concluded that the left suspension is malfunctioning at this time;
if T 21 >50%, then it can be concluded that the left suspension is damaged;
according to the left suspension bracket, two scale areas are engraved on the left suspension bracket, after the suspension system is loaded or the vehicle is stopped after running for a period of time, the displacement of the left suspension bracket can be measured, the deflection angle of the left suspension can be calculated according to the displacement, so that whether the posture of the left suspension meets the requirement can be judged, the static rigidity of the left suspension can be calculated according to the displacement and the pressure exerted by other parts in the vehicle, whether the static rigidity of the left suspension meets the requirement can be judged, and whether the left suspension can be operated normally can be obtained at the vehicle end, and the corresponding numerical value can be calculated without disassembling the suspension system.
For right suspension: after the first detection part and the second detection part receive the starting signal, the current position of the bracket arm is read, namely a second displacement and a third displacement, and the second displacement is recorded as S 22 The third displacement is denoted as S 32 The second displacement is the distance that the second end of the bracket arm detected by the first detecting element moves along the second direction in the static compression state, the third displacement is the distance that the second end of the bracket arm detected by the second detecting element moves along the second direction in the static compression state, and the distance between the two scale marks in the mark scale areas on the bracket arm along the third direction is denoted as S 22-32 According to the second displacement and the third displacement, and the distance S along the third direction between the scale marks in the two marked scale areas 22-32 The second inclination angle of the second end of the bracket arm relative to the side of the support frame close to the second end can be calculated, and the second inclination angle is calculated as follows:
wherein: θ 2 A second tilt angle representing the right suspension;
S 22 representing a second displacement;
S 32 representing a third displacement;
if the second inclination angle theta 2 When the angle threshold value is smaller than or equal to the angle threshold value, judging that the right suspension gesture meets the requirement;
if the second inclination angle theta is judged 2 And when the angle threshold value is larger than the angle threshold value, judging that the right suspension posture is not in accordance with the requirement.
After obtaining the second displacement S 22 And said third displacement S 32 After that, the pressure is detectedThe part receives the starting signal, acquires a second pressure value and records the second pressure value as F 22 The first judging module judges the second pressure value F 22 When the pressure threshold value is not within the pressure threshold value range, judging that the right suspension is damaged;
judging the second pressure value F 22 When the pressure threshold value is within the pressure threshold value range, judging that the right suspension can normally operate;
according to the second displacement S of the right suspension 22 And said third displacement S 32 And the second pressure value F 22 A second stiffness deviation ratio of the right suspension can be calculated, the second stiffness deviation ratio of the right suspension is represented by T 22 The specific calculation method is as follows:
wherein: k (K) S3 A first stiffness value at a second displacement;
K S4 a first stiffness value at a third displacement;
K S3-S4 is the average first stiffness value;
the second stiffness deviation ratio
Wherein: t (T) 22 Represents a second stiffness deviation ratio;
K (S3-S4) label Representing a first standard stiffness value;
if T 22 ≤15％K (S3-S4) label The static rigidity of the right suspension can be judged to be qualified;
if T 22 >15％K (S3-S4) label The static rigidity of the right suspension can be judged to be unqualified;
if 25% K (S3-S4) label <T 22 ≤50％K (S3-S4) label Then it can be concluded that the right suspension is malfunctioning at this time;
if T 22 >50% of the time, it can be concluded that the right suspension is damaged.
According to the method, two scale areas are engraved on the right-suspended bracket, after the suspension system is loaded or the vehicle is stopped after running for a period of time, the displacement of the right-suspended bracket can be measured, the deflection angle of the right-suspended bracket can be calculated according to the displacement, so that whether the posture of the right-suspended bracket meets the requirement can be judged, the static rigidity of the right-suspended bracket can be calculated according to the displacement and the pressure exerted by other parts in the vehicle and the right-suspended bracket, whether the static rigidity of the right-suspended bracket meets the requirement can be judged, and the right-suspended bracket can be operated normally, so that corresponding numerical values can be obtained and calculated at the vehicle end without disassembling the suspension system.
S6, when the vehicle is running, receiving a starting signal, and obtaining a third pressure value F of the rear suspension 3 The method comprises the steps of carrying out a first treatment on the surface of the The third pressure value F 3 The pressure detection part obtains the pressure value born by the rear suspension in a dynamic change state; the dynamic change state is a state of the rear suspension in the running process of the vehicle;
s7, judging when the third pressure value F 3 When the pressure threshold value is within the pressure threshold value range, judging that the rear suspension component normally operates;
s8, judging a third pressure value F 3 When the pressure is not within the pressure threshold range, judging that the rear suspension part is damaged;
because in the vehicle operation process, the engine has torque output, and the rear suspension can provide a counter force to pull the range extender, the force born by the rear suspension is measured in real time, and whether the rear suspension is in a pressure threshold value is judged, so that whether the rear suspension is damaged or not can be judged, real-time measurement at a vehicle end can be realized, and the rear suspension is not required to be detached.
Specific examples are set forth herein to illustrate the principles and embodiments of the present application, and the description of the examples above is only intended to assist in understanding the methods of the present application and their core ideas. The foregoing is merely a preferred embodiment of the present application, and it should be noted that, due to the limited nature of text, there is an objectively infinite number of specific structures, and that, to those skilled in the art, several improvements, modifications or changes can be made, and the above technical features can be combined in a suitable manner, without departing from the principles of the present invention; such modifications, variations and combinations, or the direct application of the concepts and aspects of the invention in other applications without modification, are intended to be within the scope of this application.
Claims (10)
1. A state detection assembly of an automotive suspension system is characterized in that,
the suspension system includes:
a support frame (1), the support frame (1) having a first space penetrating in a first direction;
a rubber main spring (2), wherein the rubber main spring (2) is arranged in the first space; a second space is formed in the rubber main spring (2), and a first opening communicated with the second space is formed in the side wall of the rubber main spring (2);
a bracket arm (3), the bracket arm (3) having a first end and a second end; the first end enters the first opening along the first direction; the second end is connected with the engine; at least one scale marking area (4) is arranged on one side, close to the supporting frame (1), of the top of the second end;
the suspension system has a free state, a static compression state and a dynamic change state;
the detection assembly includes:
the displacement detection piece (5) is arranged on one side, close to the second end, of the support frame (1); the axis of the displacement detecting member (5) is arranged along the first direction; the displacement detection piece (5) is provided with a detection end; in the free state, the detection end corresponds to the initial moment of the marked scale area (4); the displacement detecting member (5) is configured to detect a first displacement of the first end in a second direction in the stationary compression state; the second direction is perpendicular to the first direction.
2. The state detection assembly of an automotive suspension system according to claim 1, characterized in that the second end top is provided with two marked graduation areas (4) on the side close to the support frame (1); the two marked scale areas (4) are distributed along a third direction, and the third direction is perpendicular to the first direction and the second direction;
the displacement detection parts (5) are two; the two displacement detection pieces (5) comprise a first detection piece (501) and a second detection piece (502);
in the free state, the detection ends of the first detection piece (501) and the second detection piece (502) are corresponding to the initial scales of the marked scale zone (4) corresponding to the detection ends;
the first detecting member (501) is configured to detect a second displacement of the second end in the second direction in the stationary compression state; the second detecting member (502) is configured to detect a third displacement of the second end in the second direction.
3. The automotive suspension system condition sensing assembly of claim 1 or 2, further comprising:
a pressure detection member (6), wherein the pressure detection member (6) is arranged at the bottom of the first space; the pressure detection piece (6) is positioned right below the rubber main spring (2);
in the free state, the pressure detecting member (6) is used for measuring an initial pressure value born thereon;
the pressure detecting member (6) is used for measuring a first pressure value born by the pressure detecting member in the static compression state;
the pressure detecting member (6) is configured to measure a second pressure value received thereon in the dynamic state.
4. The automotive suspension system condition sensing assembly of claim 3 further comprising:
the first operation module is configured to calculate a first rigidity deviation ratio according to the first displacement;
a second operation module configured to calculate an inclination angle according to the second displacement and the third displacement;
the first judging module is configured to judge whether the first pressure value and the second pressure value are within a pressure threshold range.
5. A state detection method of an automotive suspension system, applied to a state detection assembly of an automotive suspension system as claimed in any one of claims 1 to 4, comprising the steps of:
receiving a starting signal, and acquiring the first displacement and the first pressure value, wherein the first displacement is the moving distance of the second end of the bracket arm, which is detected by the displacement detecting piece, along the second direction under the static compression state; the first pressure value is a pressure value born by the pressure detection part under the static compression state;
calculating a first stiffness deviation ratio of the suspension system according to the first displacement and the first pressure value;
when the first rigidity deviation ratio is smaller than or equal to a static rigidity threshold value, judging that the static rigidity of the suspension system meets the requirement;
and when the first rigidity deviation ratio is larger than the static rigidity threshold value, judging that the static rigidity of the suspension system does not meet the requirement.
6. The state detection method according to claim 5, characterized in that based on the state detection assembly of the automotive suspension system according to claim 2, the detection method further comprises the steps of:
receiving a starting signal, and acquiring the second displacement and the third displacement; the second displacement is a moving distance of the second end of the bracket arm, which is detected by the first detection piece, along the second direction under the static compression state; the third displacement is the moving distance of the second end of the bracket arm, which is detected by the second detection part, along the second direction under the static compression state;
calculating the inclination angle of the second end of the bracket arm relative to one side of the support frame, which is close to the second end, according to the second displacement and the third displacement;
when the inclination angle is smaller than or equal to an angle threshold value, judging that the posture of the suspension system meets the requirement; and when the inclination angle is larger than the angle threshold, judging that the posture of the suspension system is not in accordance with the requirement.
7. The state detection method according to claim 6, further comprising the step of, after the second displacement and the third displacement are acquired:
receiving a starting signal and acquiring the second pressure value; the second pressure value is the pressure value born by the pressure detection part under the static compression state;
calculating a second stiffness deviation ratio of the suspension system based on the second displacement, the third displacement, and the second pressure value;
when the second rigidity deviation ratio is smaller than or equal to the static rigidity threshold value, judging that the static rigidity of the suspension system meets the requirement;
and when the second rigidity deviation ratio is larger than the static rigidity threshold value, judging that the static rigidity of the suspension system does not meet the requirement.
8. The state detection method according to claim 7, characterized in that based on the state detection assembly of the automotive suspension system according to claim 3, the detection method further comprises the steps of:
judging that the components of the suspension system are damaged when the first pressure value is not in the pressure threshold range;
and when the first pressure value is judged to be within the pressure threshold range, judging that the components of the suspension system normally operate.
9. The state detection method according to claim 8, characterized in that the detection method further comprises the steps of:
judging that the components of the suspension system are damaged when the second pressure value is not in the pressure threshold range;
and when the second pressure value is judged to be within the pressure threshold range, judging that the components of the suspension system normally operate.
10. The state detection method according to claim 9, further comprising the step of:
receiving a starting signal to obtain a third pressure value; the third pressure value is the pressure value born by the pressure detection part under the dynamic change state; the dynamic change state is a state presented by a suspension system in a whole vehicle motion state;
judging that the components of the suspension system normally operate when the third pressure value is within the pressure threshold range;
and when the third pressure value is not in the pressure threshold range, judging that the components of the suspension system are damaged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310088940.XA CN116067682A (en) | 2023-04-07 | 2023-04-07 | State detection assembly and detection method for automobile suspension system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310088940.XA CN116067682A (en) | 2023-04-07 | 2023-04-07 | State detection assembly and detection method for automobile suspension system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116067682A true CN116067682A (en) | 2023-05-05 |
Family
ID=86172952
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310088940.XA Pending CN116067682A (en) | 2023-04-07 | 2023-04-07 | State detection assembly and detection method for automobile suspension system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116067682A (en) |
-
2023
- 2023-04-07 CN CN202310088940.XA patent/CN116067682A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7762736B2 (en) | Ball and socket joint with sensor device and process for wear measurement | |
| JP2008547036A (en) | Ball joint with sensor device, method for measuring load and method for measuring wear | |
| CN111168718A (en) | Device for detecting collision force and collision power of cooperative mechanical arm and environment | |
| CN104005324A (en) | Pavement texture information detection system | |
| US11391617B2 (en) | Weight-bearing measurement device and method and weight-bearing equipment | |
| CN116067682A (en) | State detection assembly and detection method for automobile suspension system | |
| CN204788644U (en) | A sensor device for surveying faint vibration situation of vehicle | |
| US20090158860A1 (en) | Weight Sensing Device For Vehicles | |
| CN211317204U (en) | Displacement measuring equipment | |
| CN1220033C (en) | Detection apparatus for operation force on shift-handle and corresponding displacement | |
| CN109696261A (en) | A kind of rectangularity measures the device of roller bolt stress in feed screw nut | |
| US20100300190A1 (en) | Monocoque of vehicle capable of detecting strain | |
| CN213147666U (en) | Bearing clearance detection device | |
| CN202264695U (en) | Weighing sensing system based on detection of axle housing deformation of vehicle | |
| CN111595505B (en) | Axial force sensor assembly, robot clamping jaw and robot | |
| CN104390686B (en) | A kind of sensor base for lever pressure transducer | |
| CN213209327U (en) | Three-dimensional force sensor | |
| CN209264160U (en) | A kind of rectangularity measures the device of roller bolt stress in feed screw nut | |
| CN214502370U (en) | Vehicle separation and reunion footboard stroke detection device and vehicle | |
| EP2028028A1 (en) | Tire receiving force sensing apparatus | |
| CN212871599U (en) | Programming test device for a tension sensor | |
| RU2786759C1 (en) | Strain sensor | |
| CN211784269U (en) | Detection device | |
| CN212844147U (en) | Pressure sensor with double checking functions | |
| CN220339621U (en) | Robot rigidity test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |