CN101477136A - Wheel rotating speed measurement method and device based on wheel-loaded intelligent sensing - Google Patents
Wheel rotating speed measurement method and device based on wheel-loaded intelligent sensing Download PDFInfo
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- CN101477136A CN101477136A CNA2009100775771A CN200910077577A CN101477136A CN 101477136 A CN101477136 A CN 101477136A CN A2009100775771 A CNA2009100775771 A CN A2009100775771A CN 200910077577 A CN200910077577 A CN 200910077577A CN 101477136 A CN101477136 A CN 101477136A
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Abstract
The invention relates to a wheel speed measuring method and a device based on a wheel load type intelligent sensor. The centripetal specific force acceleration of a wheel is measured by an MEMS acceleration sensor, and the centripetal acceleration of the operation of the wheel is obtained through signal filtration and gravity acceleration compensation so as to calculate the wheel speed. The device comprises a wheel load wheel rotating speed measuring module and a central control module in a vehicle, wherein the wheel load wheel rotating speed measuring module is arranged on the surface of the hub of the wheel, and comprises a micro inertial measuring unit, a micro controller, a wireless receiving and transmitting unit and a power module; the central control module in the vehicle comprises a wireless receiving and transmitting unit, a digital signal processor, a man-computer interactive unit and a power module; and the wheel load wheel rotating speed measuring module and the central control module in the vehicle are provided with two-way communication function.
Description
Technical field
The present invention relates to motor vehicle safe operation status monitoring, relate in particular to a kind of vehicle wheel rotational speed measuring method and device that utilizes wheel load formula intelligence sensor.
Background technology
Motor vehicle security of operation Condition Monitoring Technology is the main means that guarantee motor vehicle safe drive, also is the inexorable trend of motor vehicle security of operation detection technique development.Adopt motor vehicle security of operation condition monitoring technology that motor vehicle security of operation state and operating index are carried out dynamic monitoring, in time find and the prevention vehicle trouble, development is monitored, controls, manages and made a strategic decision in the safety supervisory network system of one, and is significant to the motor vehicle safe operation; It is the important social public good technical work that is related to the country and people's security of the lives and property, is to ensure that motor vehicles security of operation important techniques supports, and be the very important technical guarantee of government administration section to the motor vehicle safe operation; It can not only improve the technical guarantee ability of motor vehicle safe operation and reduce traffic hazard, and the development that promotes auto industry and communications and transportation cause is of great importance.
Motor vehicle security of operation status monitoring mainly comprises monitoring motor vehicle (vehicle body, wheel) athletic posture parameter, dynamic loading parameter, braking ability parameter.Motor vehicle is in operational process, operating modes such as meeting produces and brakes, quickens, turns to, straight-line travelling, wheel is a unique and ground engaging element in the motor-driven vehicle going process, comprise abundant motor vehicle operation information (athletic posture, driving force, damping force, dynamic loading, rotation, impact), can obtain direct, the truest, the abundantest motor vehicle safe operation information by the monitoring wheel rotating speed.Vehicle wheel rotational speed is the important parameter that calculates wheel braking retarded velocity and wheel slip, and wheel slip is a parameter of weighing the best on-position of vehicle anti-lock brake system, and pre-preventing motor-vehicle braking ability fault is all had decisive influence.
At present, the vehicle wheel rotational speed monitoring method is to adopt the measuring method of gathering vehicle wheel rotational speed by wheel ABS wheel speed sensors (non-monitoring system), exist to be difficult to the wheel speed and the retarded velocity of ABS wheel speed sensors self are carried out real-time problems of monitoring, lack the fault of monitoring the ABS wheel speed sensors in real time, the effective means of accuracy.
Summary of the invention
For solving problem and the defective that exists in above-mentioned, the invention provides that a kind of volume is little, simple installation, good, the intelligentized motor vehicle wheel load of real-time formula vehicle wheel rotational speed measuring method and device.
The present invention is achieved by the following technical solutions:
Involved in the present invention is a kind of based on the wheel-loaded intelligent sensing wheel rotating speed measurement method, and this method may further comprise the steps:
Measure the entad specific force acceleration and the interior temperature of tire of wheel;
Entad specific force acceleration measurement according to the wheel of measuring is carried out temperature compensation;
Wheel after the delivery temperature compensation is the specific force acceleration entad;
Entad the specific force acceleration carries out signal filtering, the acceleration of gravity compensation deals draw the centripetal acceleration of wheel with wheel, and calculates vehicle wheel rotational speed.
Described method also comprises:
According to the needs of control, send the rotating speed order of control wheel load wheel, and revise control strategy and algorithm with communication;
The real-time rotary speed data of analysing vehicle wheels and its historical data, and the rotating speed trend of prediction wheel;
Transducing signal is carried out self-correcting, and monitoring power supply state.
What the invention still further relates to is a kind of based on the wheel-loaded intelligent sensing wheel rotation-speed measuring device, and this device comprises:
The wheel speed measurement module is installed on the surface of tire inner wheel hub, is used to measure wheel entad specific force acceleration information and the interior temperature of tire;
Central control module is used to receive from the wheel of wheel load wheel rotating speed measuring module emission entad specific force acceleration signal and data, and to wheel entad the specific force acceleration signal carry out filtering and the acceleration of gravity compensation calculates wheel velocity;
Described wheel speed measurement module also comprises inertia sensing measuring unit, micro controller unit and wireless transmit/receive units, inertia sensing measuring unit wherein, form by embedded MEMS acceleration transducer and temperature sensor, wherein, embedded MEMS acceleration transducer is in order to measure the entad specific force acceleration of wheel; Temperature sensor is used for measuring in real time the temperature in the tire, and carries out temperature compensation according to the entad specific force acceleration measurement of the wheel of measuring; Microcontroller is electrically connected mutually with inertia sensing measuring unit and micro controller unit; Wireless transmit/receive units receives entad specific force acceleration signal of described wheel, and the order emission that digital signal processor sends over is exported.
Described central control module also comprises wireless transmit/receive units, digital signal processor and man-machine interaction unit, wherein, wireless transmit/receive units and digital signal processor, wireless transmit/receive units and digital signal processor interconnect, wherein, digital signal processor sends order and data by wireless transmit/receive units to the vehicle wheel rotational speed measurement module; Man-machine interaction unit, interconnect with digital signal processor, and the result that digital signal processor sends shown and output and the keyboard that is provided with in the man-machine interaction unit is provided with parameter with interrupt mode, and this is provided with parameter is stored in the digital signal processor.
Described central control module also is provided with the expansion interface of vehicle CAN bus, simultaneously, the inside of the digital signal processor of central control module is provided with storer, and this storer is provided with the electrical form that is used to preserve measurement data, so that other equipment are by CAN bus access related data, and the CAN interface makes other peripheral hardwares realize plug and play.
The beneficial effect of technical scheme provided by the invention is:
1, by use MEMS inertia measurement technology, wireless sensor technology is measured vehicle wheel rotational speed, reality to the real-time monitoring of vehicle wheels rotating speed;
2, by to the vehicle wheel rotational speed parameter monitoring, can calculate, analysis and predicting machine motor vehicle wheels braking ability, slip property etc., pre-preventing motor-vehicle braking ability fault there is decisive influence.
3, by the analyses and prediction program vehicle wheel rotational speed data and its historical data analysis are compared, obtain the trend of vehicle wheel rotational speed, increase is to the forecast function of vehicle wheel rotational speed, form complete, a relatively independent measuring table, and can provide the uniform data interface modes to be applied for administrative authority of government concerned.
Description of drawings
Fig. 1 is a rotating speed measurement method process flow diagram in the wheel load formula wheel car;
Fig. 2 is that wheel load formula wheel tyre is measured process flow diagram;
Fig. 3 is the complete layout of wheel load formula vehicle wheel rotational speed measurement mechanism;
Fig. 4 is the hardware structure diagram of wheel load formula vehicle wheel rotational speed measurement mechanism;
Fig. 5 installs two-dimensional representation for the tire measurement module;
The curve map of the entad specific force acceleration of one of them regulation point of wheel that Fig. 6 measures for wheel load formula vehicle wheel rotational speed measurement mechanism.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, embodiment of the present invention is described further in detail below in conjunction with accompanying drawing:
Present embodiment provides a kind of method based on the wheel-loaded intelligent sensing wheel tachometric survey.
Referring to Fig. 1, be to the detailed process of wheel load Shi Chenei tachometric survey:
Does step 11 judge that measurement data is the new data of measuring? be execution in step 12; Not, execution in step 17.
The compensation deals of step 13 acceleration of gravity draw the centripetal acceleration of wheel.
The real-time rotary speed data of step 14 pair wheel carries out analyses and prediction.
Does step 17 judge that keyboard interrupts? if keyboard interrupt, execution in step 18, otherwise, execution in step 19.
Does step 19 judge whether to starting measurement? if, execution in step 20, otherwise, execution in step 21.
Does step 21 judge whether to be control command? if execution in step 22 then, otherwise, execution in step 11.
Referring to Fig. 2, the detailed process that wheel load formula tire rotational speed is measured is:
Receive the wireless signal that central control module 3 sends in the car by the wireless signal Transmit-Receive Unit.
Does step 33 judge whether to be measurement pattern? if, execution in step 34, otherwise execution in step 35.
After step 38 temperature compensation, measured value is stored in cell fifo.
Referring to Fig. 3, shown in Figure 5: a kind of integral layout figure of the present invention based on the wheel-loaded intelligent sensing wheel rotation-speed measuring device, comprise central control module 3 in the wheel 1, vehicle wheel rotational speed measurement module 2, car, wherein vehicle wheel rotational speed measurement module 2 is installed on the tire 1a inner wheel hub surface 1b with wheel 1, central control module 3 is installed in the car in the car; Realize both-way communication by less radio-frequency between the central control module 7 in vehicle wheel rotational speed measurement module 2 and the car.The curve (referring to Fig. 6) of the entad specific force acceleration of corresponding one of them the regulation point of a wheel that wheel load formula vehicle wheel rotational speed measurement mechanism measures.
Referring to 4, wheel-loaded intelligent sensing wheel rotation-speed measuring device of the present invention comprises wheel load wheel rotating speed measuring module 2 and Che Nei central control module 3.This wheel load wheel rotating speed measuring module 2 be installed in the tire wheel firm on.Wheel load wheel rotating speed measuring module 2 comprises inertia sensing measuring unit 2a, micro controller unit 2b and wireless transmit/receive units 2c; This inertia sensing measuring unit 2a comprises MEMS micro-acceleration sensor 21a and temperature sensor 22a; This inertia sensing measuring unit 2a and micro controller unit 2b are electrically connected mutually; Micro controller unit 2b and wireless transmit/receive units 2c interconnect.Wherein, single-axis acceleration sensors 21a adopts the ADXL190 type, and microcontroller 2b adopts the C8051F350 type, and wireless transmit/receive units 2c adopts the CC2400 type.
Inertia sensing measuring unit 2a, output wheel be specific force acceleration and the interior temperature analog signal of tire entad.Form by single-axis acceleration sensors 21a, temperature sensor 22a;
Entad specific force acceleration and temperature analog signal become digital signal to the mould of microcontroller 2b inside/number conversion peripheral hardware with wheel;
Wireless transmit/receive units 2c receives entad specific force acceleration signal of above-mentioned wheel; The order emission output that wireless transmit/receive units 2c sends over digital signal processor 2d;
First power supply unit 4 provides direct supply for inertia sensing measuring unit 2a, microcontroller 2b, wireless transmit/receive units 2c; Second source unit 5 provides direct supply for wireless transmit/receive units 2c, digital signal processor 2d and man-machine interaction unit 2e;
Man-machine interaction unit 2e comprises a LCDs 21e, buzzing alarming device 22e, a keyboard 23e and a state indicating member 24e, this LCDs 21e is used for the digital signal of display digit signal processor output, and LCDs 21e shows the rotating speed and the relevant operating condition information of each wheel; Buzzing alarming device 22e receives the digital signal from signal processor, and buzzing caution when appearance is unusual; Whether state indicating member 24e is normal by the present running status of red green two LED signal lamp indication mechanisms; Keyboard 23e is used to be provided with correlation parameter, historical query.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (6)
1, a kind ofly it is characterized in that based on the wheel-loaded intelligent sensing wheel rotating speed measurement method this method may further comprise the steps:
Measure the entad specific force acceleration and the interior temperature of tire of wheel;
Entad specific force acceleration measurement according to the wheel of measuring is carried out temperature compensation;
Wheel after the delivery temperature compensation is the specific force acceleration entad;
Entad the specific force acceleration carries out signal filtering, the acceleration of gravity compensation deals draw the centripetal acceleration of wheel with wheel, and calculates vehicle wheel rotational speed.
2, according to claim 1ly it is characterized in that based on the wheel-loaded intelligent sensing wheel rotating speed measurement method described method also comprises:
According to the needs of control, send the rotating speed order of control wheel load wheel, and revise control strategy and algorithm with communication;
The real-time rotary speed data of analysing vehicle wheels and its historical data, and the rotating speed trend of prediction wheel;
Transducing signal is carried out self-correcting, and monitoring power supply state.
3, a kind ofly it is characterized in that based on the wheel-loaded intelligent sensing wheel rotation-speed measuring device this device comprises:
The wheel speed measurement module is installed on the surface of tire inner wheel hub, is used to measure wheel entad specific force acceleration information and the interior temperature of tire;
Central control module is used to receive from the wheel of wheel load wheel rotating speed measuring module emission entad specific force acceleration signal and data, and to wheel entad the specific force acceleration signal carry out filtering and the acceleration of gravity compensation calculates wheel velocity;
4, according to claim 3ly it is characterized in that based on the wheel-loaded intelligent sensing wheel rotation-speed measuring device described wheel speed measurement module also comprises inertia sensing measuring unit, micro controller unit and wireless transmit/receive units, wherein
The inertia sensing measuring unit is made up of embedded MEMS acceleration transducer and temperature sensor, and wherein, embedded MEMS acceleration transducer is in order to measure the entad specific force acceleration of wheel; Temperature sensor is used for measuring in real time the temperature in the tire, and carries out temperature compensation according to the entad specific force acceleration measurement of the wheel of measuring;
Microcontroller is electrically connected mutually with inertia sensing measuring unit and micro controller unit;
Wireless transmit/receive units receives entad specific force acceleration signal of described wheel, and the order emission that digital signal processor sends over is exported.
5, according to claim 3ly it is characterized in that based on the wheel-loaded intelligent sensing wheel rotation-speed measuring device described central control module also comprises wireless transmit/receive units, digital signal processor and man-machine interaction unit, wherein,
Wireless transmit/receive units and digital signal processor, wireless transmit/receive units and digital signal processor interconnect, and wherein, digital signal processor sends order and data by wireless transmit/receive units to the vehicle wheel rotational speed measurement module;
Man-machine interaction unit, interconnect with digital signal processor, and the result that digital signal processor sends shown and output and the keyboard that is provided with in the man-machine interaction unit is provided with parameter with interrupt mode, and this is provided with parameter is stored in the digital signal processor.
6, according to claim 3 or 5 described based on the wheel-loaded intelligent sensing wheel rotation-speed measuring device, it is characterized in that, described central control module also is provided with the expansion interface of vehicle CAN bus, simultaneously, the inside of the digital signal processor of central control module is provided with storer, and this storer is provided with the electrical form that is used to preserve measurement data, so that other equipment pass through CAN bus access related data, and the CAN interface makes other peripheral hardwares realize plug and play.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNA2009100775771A CN101477136A (en) | 2009-01-23 | 2009-01-23 | Wheel rotating speed measurement method and device based on wheel-loaded intelligent sensing |
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| CNA2009100775771A CN101477136A (en) | 2009-01-23 | 2009-01-23 | Wheel rotating speed measurement method and device based on wheel-loaded intelligent sensing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103175987A (en) * | 2013-03-07 | 2013-06-26 | 江苏大学 | Device and method for detecting vehicle speed on parking condition with assistance of acceleration sensor |
| CN103781641A (en) * | 2011-09-12 | 2014-05-07 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for filtering data in a tyre pressure monitoring system for a vehicle |
| CN105067831A (en) * | 2015-07-17 | 2015-11-18 | 恒信大友（北京）科技有限公司 | CAN-bus rotating speed sensor and data processing method based on CAN bus |
| CN106274308A (en) * | 2015-06-24 | 2017-01-04 | 通用汽车环球科技运作有限责任公司 | Integrated sensing unit and the method being used for determining wheel of vehicle speed and tire pressure |
| CN106803338A (en) * | 2017-03-27 | 2017-06-06 | 吉林大学 | A kind of intelligent radio system for gathering and processing tyre accelerations signal |
| CN105264387B (en) * | 2013-06-04 | 2018-07-13 | 西门子公司 | Method for determining at least one of rail vehicle speed |
| CN109915330A (en) * | 2019-03-14 | 2019-06-21 | 埃斯倍风电科技(青岛)有限公司 | A method of axial fan hub revolving speed is measured using gravity accelerometer |
| CN111399415A (en) * | 2020-03-26 | 2020-07-10 | 西南大学 | Equivalent analog wireless revolution speed sensor and speed measuring method thereof |
-
2009
- 2009-01-23 CN CNA2009100775771A patent/CN101477136A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103781641A (en) * | 2011-09-12 | 2014-05-07 | 大陆-特韦斯贸易合伙股份公司及两合公司 | Method for filtering data in a tyre pressure monitoring system for a vehicle |
| US9272585B2 (en) | 2011-09-12 | 2016-03-01 | Continental Teves Ag & Co. Ohg | Method for filtering data in a tire pressure monitoring system for a vehicle |
| CN103781641B (en) * | 2011-09-12 | 2016-08-24 | 大陆-特韦斯贸易合伙股份公司及两合公司 | The method of the data in the tire pressure monitoring system of filter motor-car |
| CN103175987A (en) * | 2013-03-07 | 2013-06-26 | 江苏大学 | Device and method for detecting vehicle speed on parking condition with assistance of acceleration sensor |
| CN105264387B (en) * | 2013-06-04 | 2018-07-13 | 西门子公司 | Method for determining at least one of rail vehicle speed |
| CN106274308A (en) * | 2015-06-24 | 2017-01-04 | 通用汽车环球科技运作有限责任公司 | Integrated sensing unit and the method being used for determining wheel of vehicle speed and tire pressure |
| CN105067831A (en) * | 2015-07-17 | 2015-11-18 | 恒信大友（北京）科技有限公司 | CAN-bus rotating speed sensor and data processing method based on CAN bus |
| CN106803338A (en) * | 2017-03-27 | 2017-06-06 | 吉林大学 | A kind of intelligent radio system for gathering and processing tyre accelerations signal |
| CN109915330A (en) * | 2019-03-14 | 2019-06-21 | 埃斯倍风电科技(青岛)有限公司 | A method of axial fan hub revolving speed is measured using gravity accelerometer |
| CN111399415A (en) * | 2020-03-26 | 2020-07-10 | 西南大学 | Equivalent analog wireless revolution speed sensor and speed measuring method thereof |
| CN111399415B (en) * | 2020-03-26 | 2021-03-30 | 西南大学 | Speed measuring method of equivalent analog wireless revolution speed sensor |
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Open date: 20090708 |