CN106840471B - Integrated measurement system and method for vehicle stability and acting force in tire surface - Google Patents
Integrated measurement system and method for vehicle stability and acting force in tire surface Download PDFInfo
- Publication number
- CN106840471B CN106840471B CN201710002195.7A CN201710002195A CN106840471B CN 106840471 B CN106840471 B CN 106840471B CN 201710002195 A CN201710002195 A CN 201710002195A CN 106840471 B CN106840471 B CN 106840471B
- Authority
- CN
- China
- Prior art keywords
- measuring
- tire
- vehicle
- stability
- brake pedal
- 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.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/04—Measuring force or stress, in general by measuring elastic deformation of gauges, e.g. of springs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
- G01L5/225—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to foot actuated controls, e.g. brake pedals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/12—Static balancing; Determining position of centre of gravity
- G01M1/122—Determining position of centre of gravity
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Tires In General (AREA)
Abstract
The invention discloses a vehicle stability and tire in-plane acting force integrated measurement system and a method, comprising a positioning system, a vehicle stability measurement system, a tire dynamic strain measurement system and a data acquisition and processing system, wherein: the positioning system is used for recording the running position information, the movement time and the time base information of the vehicle in real time; the vehicle stability measuring system is used for measuring a vehicle mass center stability parameter, a steering wheel steering angle parameter and a brake pedal force parameter in real time; the tire dynamic strain measurement system is used for measuring the rotating speed and the acceleration of a tire and the strain information of a hub and a tire tread in real time; and the data acquisition and processing system is used for acquiring data recorded by the positioning system, the vehicle stability measuring system and the tire dynamic strain measuring system, and processing and storing the data. The invention can quickly, accurately and synchronously detect the stability parameters of the vehicle under the unsteady state input and the time-varying characteristic of the acting force in the tire surface.
Description
Technical Field
The invention relates to the field of vehicle testing, in particular to a system and a method for integrally measuring vehicle stability and acting force in a tire surface.
Background
The tire trace of the accident site reflects the motion track, the running speed, the tire state and the braking measure of the vehicle before and after the accident, and the instantaneous speed, the collision characteristic, the contact position and the collision point position of the vehicle before and after the collision can be judged by analyzing the tire trace. Therefore, surveying and analyzing the in-situ tire footprint is the most common means of accident management. However, tire footprints at road traffic accident sites often exhibit certain overt and covert characteristics, as shown in fig. 1. The tire mark with the obvious and hidden characteristics is an intuitive expression (three-dimensional global wear) that when the tire is in contact with a rough road surface and generates relative slippage under the emergency braking working condition of a vehicle, rubber particles on the tread are separated off under the coupling action of multiple factors such as load, contact stress, frictional heat generation and the like, and are unevenly adhered along the width and the circumferential direction of the tire, and is a result of the comprehensive action of the vehicle, the tire and a road surface system. The print is hidden with abundant traffic accident information, and the correlation characteristic of the analysis print and the vehicle stability is an important direction for judging the traffic accident later.
The key for analyzing the tire footprint characteristics is to obtain the correlation mechanism of the dynamic variation characteristics of the acting force in the tire surface and the unsteady dynamic parameters of the vehicle, and how to simultaneously obtain the unsteady dynamic parameters of the vehicle and the time variation characteristics of the acting force in the tire surface is the basis. Meanwhile, the traditional evaluation method is not suitable for the special field of analysis and performance evaluation of vehicle stability and acting force in the tire surface. In order to efficiently advance the progress of tire footprint characteristic determination in traffic accident determination, it is necessary to study vehicle stability measurement and tire in-plane dynamic force.
Disclosure of Invention
The invention provides a vehicle stability and tire in-plane acting force integrated measurement system and method, which can simultaneously measure the vehicle stability and the tire in-plane acting force in real time.
In order to achieve the purpose of the invention, the invention provides an integrated measuring system for vehicle stability and acting force in a tire surface, which comprises a positioning system, a vehicle stability measuring system, a tire dynamic strain measuring system and a data acquisition and processing system, wherein:
the positioning system is used for recording the running position information, the movement time and the time base information of the vehicle in real time;
the vehicle stability measuring system is used for measuring a vehicle mass center stability parameter, a steering wheel steering angle parameter and a brake pedal force parameter in real time;
the tire dynamic strain measurement system is used for measuring the rotating speed and the acceleration of a tire and the strain information of a hub and a tire tread in real time;
and the data acquisition and processing system is used for acquiring data recorded by the positioning system, the vehicle stability measuring system and the tire dynamic strain measuring system, and processing and storing the data.
Optionally, the positioning system is further configured to receive satellite signals by using general packet radio service GPRS technology, and record the moving track, the running time and the braking distance of the vehicle in a differential manner.
Optionally, the vehicle stability measuring system comprises a gyroscope, a steering wheel angle gauge, and a brake pedal force gauge, wherein,
the gyroscope is positioned at the mass center of the vehicle and used for measuring the stability parameters of the mass center of the vehicle in real time;
the steering wheel angle measuring instrument is positioned at the steering wheel and is used for measuring the steering wheel angle and the torque in real time;
the brake pedal force measuring instrument is used for detecting the force for stepping on the brake pedal.
Optionally, the brake pedal force measuring instrument is further used for triggering the positioning system, the gyroscope, the steering wheel angle measuring instrument and the tire dynamic strain measuring system to start recording when the force for stepping on the brake pedal is detected.
Optionally, the vehicle stability measuring system further comprises a wireless triggering device connected with the brake pedal force measuring instrument,
the wireless trigger device is used for sending a trigger signal to the tire dynamic strain measuring system in a wireless mode according to the trigger information of the brake pedal force measuring instrument.
Optionally, the tire dynamic strain measurement system comprises: wheel hub mounted strain sensor device, tire mounted PVDF device and wheel speed sensor measurement device, wherein
The strain sensor device is used for measuring the stress of the wheel hub;
the PVDF device is used for measuring the tire tread stress;
the wheel speed sensor measuring device is used for measuring the rotating speed and acceleration information of the tire.
Optionally, the tire dynamic strain measurement system further comprises: a data wireless transceiver device for receiving and transmitting data,
the data wireless transceiver is used for receiving a trigger signal through a Zigbee protocol Zigbee wireless transmission mode, sending the trigger signal to the strain sensor device, the PVDF device and the wheel speed sensor measuring device, and sending measured data to the data acquisition and processing system through the Zigbee wireless transmission mode.
Optionally, the tire dynamic strain measurement system further comprises: a self-supporting device for energy is provided,
the energy self-sufficient device is used for supplying power for the strain sensor device, the PVDF device, the wheel speed sensor measuring device and the data wireless transceiver device.
The invention also provides a vehicle stability and tire in-plane acting force integrated measurement method, which comprises the following steps:
when the force of stepping on a brake pedal is detected, measuring the running track, the running time and the braking distance of the vehicle in real time, and measuring the stability parameter of the mass center of the vehicle, the steering angle parameter of a steering wheel, the rotating speed and the acceleration of a tire and the strain information of a hub and a tread in real time;
and collecting, processing and storing the measured data.
Alternatively, in the step of measuring the running track, the running time and the braking distance of the vehicle in real time and measuring the vehicle center of mass stability parameter, the steering angle parameter of the steering wheel, the rotating speed and the acceleration of the tire and the wheel hub and tread strain information in real time when the force of stepping on the brake pedal is detected,
receiving satellite signals by a positioning system by adopting a General Packet Radio Service (GPRS) technology, and recording the running track, the running time and the braking distance of a vehicle in a differential mode;
measuring a vehicle mass center stability parameter in real time through a gyroscope located at the vehicle mass center;
measuring steering wheel rotation angle and torque in real time through a steering wheel rotation angle measuring instrument positioned at a steering wheel;
detecting the force for stepping on the brake pedal through a brake pedal force measuring instrument;
measuring hub stress through a strain sensor device;
measuring tread stress by a PVDF device;
and measuring the rotating speed and acceleration information of the tire through a wheel speed sensor measuring device.
The embodiment of the invention can quickly, accurately and synchronously detect the stability parameters under the unstable state input of the vehicle and the time-varying characteristic of the acting force in the tire surface, has high theoretical value for analyzing the tire print generation mechanism in the traffic accident field, and brings great convenience for the analysis and test application of the vehicle stability and the tire acting force. And a good foundation is laid for the research work of vehicle stability and tire imprinting mechanism analysis.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a diagram of the latent print characteristics of a tire;
FIG. 2 is a schematic diagram of the components of an integrated vehicle stability and in-tire force measurement system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a vehicle stability measurement system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a tire dynamic strain measurement system according to an embodiment of the present invention;
FIG. 5(a) is the PVDF device longitudinal layout and measurement principle;
FIG. 5(b) is the PVDF film measurement principle;
FIG. 5(c) is a schematic transverse layout of a PVDF plant;
FIG. 6 is a schematic diagram of an energy self-sufficient device according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of the vehicle stability and in-tire force integrated measurement system of an exemplary application of the present invention;
FIG. 8 is a flow chart of an integrated measurement method for vehicle stability and in-tire force in accordance with an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
At present, the size and the change characteristic of tire force based on a point contact model can be measured and verified through indoor static and dynamic tests, the tire dynamic characteristic is comprehensively analyzed through fitting, the stability of a vehicle is mainly analyzed, but the dynamic characteristic change of the tire cannot be accurately measured through the indoor tests in the running process of the vehicle; the tire tread internal stress testing equipment (Tirescan) can be used for analyzing the three-way acting force in the tire tread in detail, but only the transient contact characteristic of the tire on a fixed road section when the tire passes through can be analyzed; although the finite element analysis model based on the ABAQUS can comprehensively analyze tire mechanics, dynamic characteristics in a tire contact surface and the like, the tire parameters are difficult to obtain, and some parameters still need to be fitted, so that the accuracy of tire mechanics analysis is influenced.
In recent years, development of PVDF measurement technology has made it possible to measure tire dynamic strain in real time. The PVDF is very soft, can well adapt to the characteristic of large deformation of tire rubber, and has small interference on the tire rubber and more accurate measurement due to small rigidity. The mechanical property, physical property and other indexes of the existing PVDF film can meet the requirement of the tire inner testing environment. The transmission of the measurement data of the in-tire sensor from the inside of the tire rotating at a high speed can be realized only in a wireless manner, and the rapid development of the wireless local area network communication technology enables the real-time receiving and transmitting of the non-contact measurement data. Zigbee (Zigbee protocol) data transmission is a two-way wireless communication technology with short distance, low power consumption, low speed and low cost, can realize data transmission at the speed of 250kbps, is suitable for data transmission of a sensor in a tire, and provides a foundation for dynamic strain data transmission of the tire, vehicle stability and test platform development of a system for measuring acting force in the tire surface.
The embodiment of the invention provides a measuring system capable of simultaneously measuring and evaluating the stability of a vehicle and the acting force in a tire surface. The system has the characteristics of simple design, small operand, convenient implementation and the like. The system can carry out high-precision real-time measurement and evaluation on the stability of the vehicle and the acting force in the tire surface, and brings great convenience to application.
As shown in fig. 2, the integrated measuring system for vehicle stability and in-tire-surface acting force of the embodiment of the present invention can measure the in-tire-surface acting force in real time while measuring the vehicle stability parameters, and includes a positioning system 11, a vehicle stability measuring system 12, a tire dynamic strain measuring system 13, and a data acquisition and processing system 14, wherein:
the positioning system 11 is used for recording the vehicle running position information, the motion time and the time base information in real time;
the vehicle stability measurement system 12 is used for measuring a vehicle mass center stability parameter, a steering wheel steering angle parameter and a brake pedal force parameter in real time;
the tire dynamic strain measurement system 13 is used for measuring the rotating speed and the acceleration of the tire and the strain information of a hub and a tread in real time;
the data acquisition and processing system 14 is used for acquiring, processing and storing data recorded by the positioning system, the vehicle stability measurement system and the tire dynamic strain measurement system.
The embodiment of the invention can quickly, accurately and synchronously detect the stability parameters under the unstable state input of the vehicle and the time-varying characteristic of the acting force in the tire surface, has high theoretical value for analyzing the tire print generation mechanism in the traffic accident field, and brings great convenience for the analysis and test application of the vehicle stability and the tire acting force. And a good foundation is laid for the research work of vehicle stability and tire imprinting mechanism analysis.
Each component of the integrated measurement system for vehicle stability and in-tire force is described in detail below.
First, positioning system 11
The positioning system 11 is further configured to receive satellite signals by using a General Packet Radio Service (GPRS) technology, and record a vehicle running track, a running time, and a braking distance in a differential manner.
The braking distance is triggered by a brake pedal force measuring instrument in the vehicle stability measuring system 12 and is obtained through differential calculation. The running coordinates of the vehicle are stored in real time through the GPRS positioning system 11, and the multi-mode display of the vehicle track can be realized through the post data processing. Meanwhile, the GPRS-based positioning system 11 provides a time base for the whole system, and the measurement timing of all measurement systems is strictly performed according to this time base.
Vehicle stability measuring system 12
As shown in fig. 3, the vehicle stability measuring system 12 includes a gyroscope 121, a steering wheel angle meter 122, and a brake pedal force meter 123, wherein,
the gyroscope 121 is positioned at the center of mass of the vehicle and used for measuring the stability parameters of the center of mass of the vehicle in real time;
wherein, the gyroscope 121 may adopt an IMU02 gyroscope;
the steering wheel angle measuring instrument 122 is located at the steering wheel and is used for measuring steering wheel angles and torque in real time;
the brake pedal force measuring instrument 123 is used to detect the force applied to depress the brake pedal.
In this embodiment, the steering wheel angle measuring instrument 122 and the brake pedal force measuring instrument 123 are used to measure the input parameters of the vehicle model, and the gyroscope 121 is used to measure the change of the dynamic parameters of the stability of the center of mass of the vehicle.
In this embodiment, the brake pedal force measuring instrument 123 is further configured to trigger the positioning system 11, the gyroscope 121, the steering wheel angle measuring instrument 122, and the tire dynamic strain measuring system 13 to start recording when the force for stepping on the brake pedal is detected.
The brake pedal force measuring instrument 123 is further configured to trigger the positioning system 11, the gyroscope 121, the steering wheel angle measuring instrument 122 and the tire dynamic strain measuring system 13 to stop recording when the force for stepping on the brake pedal is not detected.
In other embodiments, the positioning system 11, the gyroscope 121, the steering wheel angle measuring instrument 122, and the tire dynamic strain measuring system 13 may be triggered to start recording when the force of stepping on the brake pedal is equal to or greater than a preset threshold, and the positioning system 11, the gyroscope 121, the steering wheel angle measuring instrument 122, and the tire dynamic strain measuring system 13 may be triggered to stop recording when the force of stepping on the brake pedal is less than the preset threshold.
The vehicle stability measurement system 12 may also include a wireless triggering device 124 coupled to the brake pedal force gauge 123,
the wireless triggering device 124 is configured to send a triggering signal to the tire dynamic strain measuring system 13 in a wireless manner according to the triggering information of the brake pedal force measuring instrument 123.
The wireless triggering device 124 may send a triggering signal to the tire dynamic strain measuring system 13 by using a Zigbee data transmission method.
In the present embodiment, the steering wheel angle measuring instrument 122 measures the steering wheel angle and torque, the brake pedal force measuring instrument 123 measures the force of stepping on the brake pedal, and the stability parameter at the centroid of the vehicle is measured in real time by the IMU02 gyroscope 121 and is converted into a dynamic parameter at the centroid through coordinates. The three measuring devices are triggered by the brake pedal force measuring instrument 123 and used as a reference for data storage and analysis, the measured data are directly transmitted to the data acquisition and processing system 14, can be transmitted to a data storage recorder in the data acquisition and processing system 14 through a fast bus technology, and can be further processed and analyzed by an upper computer and a software system thereof in a unified manner.
Third, tire dynamic strain measurement system 13
As shown in fig. 4, the tire dynamic strain measurement system 13 includes: a hub-mounted strain sensor device 131, a tire-mounted PVDF device 132, and a wheel speed sensor measuring device 133, wherein
The strain sensor device 131 is used for measuring the stress of the wheel hub;
wherein the strain sensor means 131 may comprise a plurality of strain sensors mounted on the hub.
The PVDF device 132 is used for measuring tread stress;
as shown in fig. 5(a) -5 (c), the PVDF device 132 may include multiple PVDF devices mounted inside the tire. Wherein L ispIndicating the length of contact of the tyre, TxDenotes the sensor contact length, v denotes the vehicle running speed, ω denotes the wheel rotational angular velocity, R denotes the sensor and tire radius, R (x, y) denotes the radius of curvature of the sensor at the corresponding point, θ denotes the sensor surface angle, and F denotes the force applied in the x direction. When the PVDF device receives a force in the x direction, the curvature of the PVDF film changes, and the stress size can be solved by measuring the deformation of the PVDF film.
The wheel speed sensor measuring device 133 is used to measure the rotational speed and acceleration information of the tire.
The wheel speed sensor measuring device 133 may employ a Kisler WPT wheel speed sensor.
In the embodiment, strain of the hub in the vehicle stability process is measured by arranging the strain sensors around the hub; the tread stress was measured by using a PVDF device and appropriately installed in the tire at a position shown in fig. 5(c), and the density thereof was determined for the purpose of study. During vehicle operation, the tire dynamic strain measurement system 13 begins measuring tire dynamic strain under the trigger of the brake pedal force gauge 123.
Although the current PVDF device can realize real-time dynamic monitoring of deformation and acceleration information in a tire, wherein the deformation data and the acceleration data are equivalent to each other and can be mutually converted through simple mathematical processing, the noise is large and certain errors exist in the measurement process. Therefore, in order to accurately measure the acceleration of the wheel, a Kisler wheel speed sensor measuring system is adopted to measure and compare and verify the rotating speed and the rotating angular acceleration of the tire.
In this embodiment, the tire dynamic strain measurement system further includes: the data radio 134 is used to transmit and receive data,
the data transceiver 134 is configured to receive the trigger signal wirelessly and transmit the trigger signal to the strain sensor device 131, the PVDF device 132, and the wheel speed sensor measuring device 133, and transmit the measured data wirelessly to the data acquisition and processing system 14.
The data wireless transceiver 134 may transmit data by using Zigbee wireless transmission technology.
The acquired data is directly transmitted by the Zigbee wireless transmission technology without being stored, and the data is transmitted to the data acquisition and processing system 14 in real time through the data wireless transceiver 134, so that the acquisition and wireless transmission of the strain information are completed.
Optionally, the tire dynamic strain measurement system 13 further comprises: the energy self-sufficient device 135,
the energy self-sufficient device 135 is used for supplying power to the strain sensor device 131, the PVDF device 132, the wheel speed sensor measuring device 133 and the data wireless transceiver device 134. As shown in fig. 6, the energy self-supply device 135 includes a charge management circuit, a lithium battery, a discharge protection circuit and a switch control circuit, which are connected in sequence, the charge power supply is respectively connected with the charge management circuit and the switch control circuit, and the switch control circuit outputs voltage to supply power to the strain sensor device 131, the PVDF device 132, the wheel speed sensor measuring device 133 and the data transceiver device 134.
Fourth, data acquisition and processing system 14
The data acquisition and processing system 14 is used for acquiring, processing and storing data recorded by the positioning system, the vehicle stability measuring system and the tire dynamic strain measuring system, and may include a data acquisition and processing module and a data storage recorder.
The data acquisition and processing module can adopt DEWEsoft, certain noise exists in data acquired by the sensor, and the data format can also need to be converted, so the data acquisition and processing module needs to properly process the data. The collected dynamic parameters of the tire, the stability parameters of the vehicle and the dynamic strain information of the tire are collected and processed in a unified way, and finally the collected parameters are transmitted to a data storage recorder through a high-speed bus technology for later data analysis and processing. And then, the measurement and data acquisition, storage and analysis work of the whole system is completed.
Fig. 7 is a schematic diagram showing a vehicle stability and in-tire force integrated measurement system according to an exemplary application of the present invention. The stability parameters of the vehicle are measured by a steering wheel angle measuring instrument, a brake pedal force measuring instrument and an IMU02 gyroscope, the dynamic characteristics of the wheels are measured by a Kistler WPT wheel speed sensor, and a GPRS/Beidou satellite measuring module is used for measuring the running track, the braking time and the braking distance of the vehicle; the tire dynamic strain testing system measures the stress of the hub and the stress of the tire tread in real time and transmits data through a local wireless transmission technology; all the system triggers are triggered by a trigger bar of the brake pedal force measuring instrument, the measured data are transmitted to a data acquisition and processing module through a time base provided by a satellite system, and finally are collected to a data storage recorder through a high-speed bus technology for later data analysis and research.
As shown in fig. 7, the method for integrally measuring vehicle stability and in-tire force according to the embodiment of the present invention includes:
in the step, a positioning system adopts a GPRS technology to receive satellite signals, and the running track, the running time and the braking distance of the vehicle are recorded in a differential mode.
The GPRS positioning system is used for recording information such as vehicle running position information, motion time, time base and the like in real time, and the information is a time reference and an object which need to be processed in the technical scheme.
Measuring a vehicle mass center stability parameter in real time through a gyroscope located at the vehicle mass center; measuring steering wheel rotation angle and torque in real time through a steering wheel rotation angle measuring instrument positioned at a steering wheel; the force with which the brake pedal is stepped is detected by the brake pedal force measuring instrument.
The centroid stability parameter during vehicle driving can be measured in real time by an IMU02 gyroscope mounted near the centroid, the steering angle input of the steering wheel is measured by a steering wheel angle measuring instrument, and the braking force is measured in real time by the brake pedal force.
Measuring hub stress through a strain sensor device; measuring tread stress by a PVDF device; and measuring the rotating speed and acceleration information of the tire through a wheel speed sensor measuring device.
The rotating speed and the acceleration of the tire and the whole contact information of the tire road surface can be measured in real time through a Kisler wheel speed sensor; the layout of a PVDF device and the fixation of a wireless data acquisition and transmission system are carried out in the tire to form a tire dynamic strain measurement system, and the tire acting force is measured in real time and the data is transmitted wirelessly in the running process of a vehicle. The time calibration adopts a wireless triggering mode to synchronize data in real time, and the wireless triggering system is triggered by the brake pedal force measuring instrument.
And 202, collecting, processing and storing the measured data.
The vehicle-mounted data acquisition and processing module and the data storage recorder are used for acquiring and processing data in real time, and the data acquisition and processing module is used for transmitting the data to the data storage recorder in real time through a high-speed bus technology, so that all data in the vehicle running process can be acquired, processed and displayed uniformly in the later period.
In summary, the embodiments of the present invention have the following advantages:
1. GPRS data acquisition, data transmission among wireless modules, data processing and storage are effectively integrated into a system, and a good platform is provided for simply and effectively evaluating the stability of a vehicle and the dynamic characteristics of acting force in a tire surface.
2. The tire dynamic strain measurement system can accurately measure the three-way acting force change characteristic of the tire in the unsteady working condition grounding process in real time, and is convenient to use, high in measurement precision and high in real-time performance.
3. The method effectively fills the hole of real-time measurement and evaluation of vehicle stability and tire acting force, and lays a good foundation for measurement of vehicle stability and tire acting force and analysis of tire imprinting mechanism in future.
Through the analysis, the vehicle stability and tire in-plane acting force integrated measurement system combined with the tire dynamic strain measurement technology provides a simple, effective, rapid and accurate method for simultaneously testing the vehicle stability and the tire in-plane acting force in real time. The method provided by the embodiment of the invention can be extended to the fields related to vehicle stability analysis, tire footprint formation, tire wear and the like, and has a wide application prospect.
It will be apparent to those skilled in the art that the modules or steps of the embodiments of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different from that described herein, or they may be separately fabricated into integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, embodiments of the invention are not limited to any specific combination of hardware and software.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The utility model provides a vehicle stability and integrated measurement system of effort in tire face which characterized in that carries out real-time measurement to effort in the tire face when measuring vehicle stability parameter, includes positioning system, vehicle stability measurement system, tire dynamic strain measurement system and data acquisition and processing system, wherein:
the positioning system is used for recording the running position information, the movement time and the time base information of the vehicle in real time; the running position information of the vehicle comprises a running track and a braking distance of the vehicle;
the vehicle stability measuring system is used for measuring a vehicle mass center stability parameter, a steering wheel steering angle parameter and a brake pedal force parameter in real time;
the tire dynamic strain measurement system is used for measuring the rotating speed and the acceleration of a tire and the strain information of a hub and a tire tread in real time;
and the data acquisition and processing system is used for acquiring data recorded by the positioning system, the vehicle stability measuring system and the tire dynamic strain measuring system, and processing and storing the data.
2. The system of claim 1,
the positioning system is further used for receiving satellite signals by adopting general packet radio service GPRS technology and recording the running track, running time and braking distance of the vehicle in a differential mode.
3. The system of claim 1,
the vehicle stability measuring system comprises a gyroscope, a steering wheel angle measuring instrument and a brake pedal force measuring instrument, wherein,
the gyroscope is positioned at the mass center of the vehicle and used for measuring the stability parameters of the mass center of the vehicle in real time;
the steering wheel angle measuring instrument is positioned at the steering wheel and is used for measuring the steering wheel angle and the torque in real time;
the brake pedal force measuring instrument is used for detecting the force for stepping on the brake pedal.
4. The system of claim 3,
the brake pedal force measuring instrument is further used for triggering the positioning system, the gyroscope, the steering wheel angle measuring instrument and the tire dynamic strain measuring system to start recording when the force for stepping on the brake pedal is detected.
5. The system of claim 4, wherein the vehicle stability measurement system further comprises a wireless triggering device coupled to the brake pedal force gauge,
the wireless trigger device is used for sending a trigger signal to the tire dynamic strain measuring system in a wireless mode according to the trigger information of the brake pedal force measuring instrument.
6. The system of claim 1, wherein the tire dynamic strain measurement system comprises: a strain sensor device mounted on the wheel hub, a plurality of piezoelectric thin film sensor PVDF devices mounted inside the tire, and a wheel speed sensor measuring device, wherein,
the strain sensor device is used for measuring the stress of the wheel hub;
the plurality of PVDF devices are used for measuring the tread stress;
the wheel speed sensor measuring device is used for measuring the rotating speed and acceleration information of the tire.
7. The system of claim 6, wherein the tire dynamic strain measurement system further comprises: a data wireless transceiver device for receiving and transmitting data,
the data wireless transceiver is used for receiving a trigger signal through a Zigbee protocol Zigbee wireless transmission mode, sending the trigger signal to the strain sensor device, the PVDF device and the wheel speed sensor measuring device, and sending measured data to the data acquisition and processing system through the Zigbee wireless transmission mode.
8. The system of claim 7, wherein the tire dynamic strain measurement system further comprises: a self-supporting device for energy is provided,
the energy self-sufficient device is used for supplying power for the strain sensor device, the PVDF device, the wheel speed sensor measuring device and the data wireless transceiver device.
9. A vehicle stability and in-tire force integrated measurement method comprises the following steps:
when detecting the power of trampling brake pedal, carry out real-time measurement to effort in the tire face when measuring vehicle stability parameter, specifically include: measuring the running track, running time and braking distance of the vehicle in real time, and measuring the stability parameter of the mass center of the vehicle, the steering angle parameter of a steering wheel, the rotating speed and acceleration of a tire and the strain information of a hub and a tread in real time;
and collecting, processing and storing the data obtained by real-time measurement.
10. The method of claim 9, wherein in the step of measuring a running track, a running time and a braking distance of the vehicle in real time, and measuring a vehicle center of mass stability parameter, a steering wheel steering angle parameter, a rotation speed and an acceleration of the tire, and wheel hub and tread strain information in real time when a force of stepping on a brake pedal is detected,
receiving satellite signals by a positioning system by adopting a General Packet Radio Service (GPRS) technology, and recording the running track, the running time and the braking distance of a vehicle in a differential mode;
measuring a vehicle mass center stability parameter in real time through a gyroscope located at the vehicle mass center;
measuring steering wheel rotation angle and torque in real time through a steering wheel rotation angle measuring instrument positioned at a steering wheel;
detecting the force for stepping on the brake pedal through a brake pedal force measuring instrument;
measuring hub stress through a strain sensor device;
measuring tread stress by a plurality of piezoelectric film sensor PVDF devices;
measuring the rotating speed and acceleration information of the tire through a wheel speed sensor measuring device;
the rotation speed and the acceleration of the tire and the strain information of the hub and the tread are respectively measured by a wheel speed sensor measuring device installed in the tire, a strain sensor device installed on the hub and a plurality of PVDF devices installed in the tire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002195.7A CN106840471B (en) | 2017-01-03 | 2017-01-03 | Integrated measurement system and method for vehicle stability and acting force in tire surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710002195.7A CN106840471B (en) | 2017-01-03 | 2017-01-03 | Integrated measurement system and method for vehicle stability and acting force in tire surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106840471A CN106840471A (en) | 2017-06-13 |
| CN106840471B true CN106840471B (en) | 2020-03-27 |
Family
ID=59117195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710002195.7A Active CN106840471B (en) | 2017-01-03 | 2017-01-03 | Integrated measurement system and method for vehicle stability and acting force in tire surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106840471B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109540013B (en) * | 2018-10-12 | 2020-05-05 | 东南大学 | Intelligent tire monitoring method and system based on long-gauge-length optical fiber sensing |
| CN110361082B (en) * | 2019-06-26 | 2021-05-14 | 麦德荣 | Monitoring system and monitoring method for measuring total weight of vehicle in real time |
| CN111127883B (en) | 2019-12-17 | 2020-10-30 | 长安大学 | Method and system for measuring and calculating safe driving speed of intelligent vehicle by considering road surface state |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786533A (en) * | 2014-02-28 | 2014-05-14 | 安徽农业大学 | System and method for monitoring loads on tires in real time in automobile driving process |
| CN106017941A (en) * | 2016-05-11 | 2016-10-12 | 吉林大学 | Testing system and method for automobile control stability |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201362249Y (en) * | 2009-03-04 | 2009-12-16 | 长安大学 | Four-wheel steering vehicle stability controlling system |
| CN101710027B (en) * | 2009-11-24 | 2011-06-01 | 江苏大学 | Non-linear dynamic characteristic monitoring system and method of vehicle tyre |
| CN202511943U (en) * | 2012-04-16 | 2012-10-31 | 吉林大学 | Articulated loader dynamic barycenter position monitoring system |
| CN202631193U (en) * | 2012-06-13 | 2012-12-26 | 吉林大学 | Dynamic detector for automotive center-of-gravity position based on brake process |
| CN102692297B (en) * | 2012-06-13 | 2014-09-17 | 吉林大学 | Braking process-based dynamic automobile gravity position detector and method |
-
2017
- 2017-01-03 CN CN201710002195.7A patent/CN106840471B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103786533A (en) * | 2014-02-28 | 2014-05-14 | 安徽农业大学 | System and method for monitoring loads on tires in real time in automobile driving process |
| CN106017941A (en) * | 2016-05-11 | 2016-10-12 | 吉林大学 | Testing system and method for automobile control stability |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106840471A (en) | 2017-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104790283B (en) | A kind of surface evenness rapid detection system based on vehicle-mounted accelerometer | |
| CN105676843B (en) | New energy automobile benchmarking analysis and evaluation system and method thereof | |
| CN103308324B (en) | Intelligent comprehensive performance detection system for vehicle | |
| CN106840471B (en) | Integrated measurement system and method for vehicle stability and acting force in tire surface | |
| CN108698593A (en) | The dangerous avoiding device of vehicle | |
| CN102261033A (en) | Inertial measurement unit (IMU) based motion compensation algorithm of vehicular pavement detection system | |
| CN103884514A (en) | Multifunctional motor vehicle detecting instrument and detecting method thereof | |
| CN103134683B (en) | The system and method for vehicle motor exhaust brake test is carried out in indoor | |
| CN103162971B (en) | Electric motor car driving process wireless test system | |
| CN103217298A (en) | Testing analyzer for driving process of light-weight type electric vehicle | |
| CN205317215U (en) | A on -vehicle integrated terminal for intelligence is driven and is examined | |
| GB2377027B (en) | Assessing the accuracy of road-side systems | |
| CN106996880A (en) | A kind of city rail vehicle braking ability measurement apparatus and method | |
| CN110132406A (en) | A kind of permanent magnet direct-drive electric locomotive shaft coupling method for detecting vibration and system | |
| CN113532609A (en) | Vehicle-mounted load detection system and calibration method | |
| CN109029353A (en) | A kind of off-highway vehicle travel route gradient measurer of going sightseeing | |
| CN204630738U (en) | Based on inertial navigation motor racing Performance Test System | |
| CN201237506Y (en) | Load position information collection apparatus for bridge structure influence line | |
| CN103293007B (en) | A kind of agricultural vehicle performance detection method and detecting instrument thereof | |
| CN201152816Y (en) | Apparatus for high speed braking efficiency detection in drum type | |
| CN206177317U (en) | Measuring device and taxi pricing device of vehicle tyre revolution | |
| CN106289308A (en) | The measuring method of vehicle tyre revolution, system and taxi pricing device | |
| WO2015089194A2 (en) | Indirect characterization of transportation networks and vehicle health | |
| CN101477757A (en) | Track recording method for movable wireless agricultural motor driven vehicle road examination | |
| CN206906034U (en) | A kind of city rail vehicle braking ability measurement apparatus |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |