CN1744145A - Automobile type built-in contactless brade sensing system - Google Patents
Automobile type built-in contactless brade sensing system Download PDFInfo
- Publication number
- CN1744145A CN1744145A CN 200510037552 CN200510037552A CN1744145A CN 1744145 A CN1744145 A CN 1744145A CN 200510037552 CN200510037552 CN 200510037552 CN 200510037552 A CN200510037552 A CN 200510037552A CN 1744145 A CN1744145 A CN 1744145A
- Authority
- CN
- China
- Prior art keywords
- power supply
- braking
- signal line
- output signal
- triggers
- 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.)
- Granted
Links
Images
Abstract
The system is composed of following parts: sensing signal unit for acceleration installed on inner hub of car tire, A/D conversion unit, central control processing unit for conversion of wheel speed, transmission unit for braking data, power supply unit triggered by motion sensing, electronic switch of power supply triggered by braking sensing, and power supply through common electrical connection inside tire. Through non-contact mode, sensor of acceleration transfers brake characteristic data to outside to provide early warning and monitoring for safety of dynamic braking performance of car under low speed and high speed. The invention is in favor of avoiding and reducing traffic accident happening.
Description
(1) technical field
The present invention relates to dynamic vehicle state safety monitoring technology field, particularly the automobile brake perfrmance sensing technology specifically is meant a kind of automobile type built-in contactless brade sensing system.
(2) background technology
In recent years the built-in TPMS of the tire of Chu Xianing (temperature, pressure monitoring system), dynamic vehicle is realized the security monitoring, yet air pressure and temperature only just can cause the danger of blowing out at a high speed and under the state that travels for a long time, the quality of braking ability then is to be included in another burst factor that can influence life security under the non-high-speed travel state at any time, be an index of crucial importance of vehicle safety travel, guarantee that good braking ability is first requirement of safe driving.For in emergency situation and following braking deceleration performance of using and showing of complex environment, can not repeat the experience of practice and state usually.The routine inspection of performance also can only be regularly to carry out one time twice every year at measuring station.Braking deceleration can be changed by all factor affecting in all the other times of travelling, even it is unknown to have greatly changed, the index of usual degree departs from and may be difficult for arousing attention, brake side-slipping and axletree sideslip hidden danger are failed in time to take preventive measures, and why Here it is has 30 ~ 50% in the traffic hazard and is caused by brake fault.Can come the indirect detection automobile brake perfrmance by comprising the used technology of automobile ABS (anti-lock brake system), belong to the contact-sensing mode, but inoperative and fast state is measured inaccurate down under the lower-speed state.Take a kind of new built-in braking sensor-based system of contactless tire, can realize the sensing and the monitoring of automobile brake perfrmance under low speed and the fast state.
(3) summary of the invention
Purpose of the present invention is exactly to measure inaccurate under inoperative under the lower-speed state and fast state in order to overcome existing contact automobile brake perfrmance method for sensing, a kind of tire type built-in contactless braking sensor-based system that solves real-time sensing of dynamic vehicle braking ability and monitoring and propose, by being installed in the acceleration transducer sensing automobile brake signal on the doughnut inner wheel hub, and present by the outside portion of wireless transmit mode bridge, implement the real-time monitoring of braking ability, for automobile provides the security early warning of braking ability at low speed with when running at high speed, help avoiding and reducing the generation of traffic hazard.
Purpose of the present invention is achieved through the following technical solutions:
A kind of automobile type built-in contactless brade sensing system is changed central controlled processing unit 3, braking-distance figures transmission transmitter unit 4, motion perception and is triggered power supply unit 5, braking perception and trigger that power supply electronic switch 6, inside tires power supply 7 are electric to be constituted by being installed in acceleration sensing signal element 1, A/D converter 2, wheel speed on the doughnut inner wheel hub, and acceleration sensing signal element 1 is connected with A/D converter 2 by output signal line; A/D converter 2 is changed central controlled processing unit 3 by output signal line and wheel speed and is connected; Wheel speed is changed central controlled processing unit 3 and is connected with braking-distance figures transmission transmitter unit 4, braking perception triggering power supply electronic switch 6 respectively by output signal line; Inside tires power supply 7 triggers power supply unit 5 with the motion perception respectively, the braking perception triggers power supply electronic switch 6 and is connected; The output signal line that the motion perception triggers power supply unit 5 is connected with the feeder ear that acceleration sensing signal element 1, A/D converter 2, wheel speed are changed central controlled processing unit 3 respectively; The output signal line that the braking perception triggers power supply electronic switch 6 is connected with the feeder ear of braking-distance figures transmission transmitter unit 4; Wherein: acceleration sensing signal element 1 is regulated to penetrate with isolation level 10 is common electric by one-dimensional acceleration transducer 8, simulating signal computing amplifier stage 9, amplitude and is constituted, its interconnected relationship is: one-dimensional acceleration transducer 8 is connected with simulating signal computing amplifier stage 9 by output signal line, and simulating signal computing amplifier stage 9 is regulated to penetrate with isolation level 10 with amplitude by output signal line and is connected; The motion perception triggers power supply unit 5 and constitutes by vibration transducer 11, pulsation amplitude limit Schmidt shaping stage 12, level output rc smoothing filter 13, level triggers formula electronic switch 14 are common electric, its interconnected relationship is: vibration transducer 11 is connected with pulsation amplitude limit Schmidt shaping stage 12 by output signal line, pulsation amplitude limit Schmidt shaping stage 12 is connected with level output rc smoothing filter 13 by output signal line, and level output rc smoothing filter 13 is connected with level triggers formula electronic switch 14 by output signal line.
The present invention compared with prior art has following advantage and beneficial effect: (1) formula safe and out of sight is installed in a kind of novel braking ability sensor-based system on the doughnut inner wheel hub, is realized the sensing and the conversion of braking characteristic signal by acceleration transducer; (2) belong to contactless sensor-based system, the security early warning and the monitoring of braking ability can be provided at low speed with when running at high speed for automobile; (3) motion perception and braking perception mechanism can be saved the energy consumption that transport process was changed and launched to sensing to greatest extent.
(4) description of drawings
Fig. 1 is the contactless braking sensor-based system of a present invention block scheme;
Fig. 2 is an acceleration sensing signal element block scheme of the present invention;
Fig. 3 is that motion perception of the present invention triggers the power supply unit block scheme;
Fig. 4 is that tire linear velocity of the present invention concerns synoptic diagram;
Fig. 5 is that tire radial acceleration of the present invention concerns synoptic diagram.
(5) embodiment
The present invention is described in further detail below in conjunction with drawings and Examples, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, the acceleration sensing signal element 1 in the contactless braking sensor-based system of the present invention is connected with A/D converter 2 by output signal line; A/D converter 2 is changed central controlled processing unit 3 by output signal line and wheel speed and is connected; Wheel speed is changed central controlled processing unit 3 and is connected with braking-distance figures transmission transmitter unit 4, braking perception triggering power supply electronic switch 6 respectively by output signal line; Inside tires power supply 7 triggers power supply unit 5 with the motion perception respectively, the braking perception triggers power supply electronic switch 6 and is connected.
As shown in Figure 2, acceleration sensing signal element 1 is regulated to penetrate with isolation level 10 is common electric by one-dimensional acceleration transducer 8, simulating signal computing amplifier stage 9, amplitude and is constituted, one-dimensional acceleration transducer 8 is connected with simulating signal computing amplifier stage 9 by output signal line, and simulating signal computing amplifier stage 9 is regulated to penetrate with isolation level 10 with amplitude by output signal line and is connected.
As shown in Figure 3, the motion perception triggers power supply unit 5 and constitutes by vibration transducer 11, pulsation amplitude limit Schmidt shaping stage 12, level output rc smoothing filter 13, level triggers formula electronic switch 14 are electric; Wherein, vibration transducer 11 is connected with pulsation amplitude limit Schmidt shaping stage 12 by output signal line, pulsation amplitude limit Schmidt shaping stage 12 is connected with level output rc smoothing filter 13 by output signal line, and level output rc smoothing filter 13 is connected with level triggers formula electronic switch 14 by output signal line.
When automobile is kept in motion, the radial acceleration transducing signal of tire just can be sampled and export to acceleration sensing signal element 1, this simulating signal converts digital signal to and delivers to wheel speed and change central controlled processing unit 3 in A/D converter 2, in changing central controlled processing unit 3, wheel speed carries out conversion process, convert the tire linear velocity to, deliver to follow-up braking-distance figures transmission transmitter unit 4 then, outwards launch.Wheel speed is changed central controlled processing unit 3 is also born simultaneously provides when braking to subsequent transmission unit 4 perception control.
During the doughnut motion, one-dimensional acceleration transducer 8 outputting radial analog acceleration signals in the acceleration sensing signal element 1, carry out the amplitude processing and amplifying through simulating signal computing amplifier stage 9, delivering to the amplitude adjusting penetrates with isolation level 10, it is the isolation level that 1 operational amplifier is formed by enlargement factor, its output terminal concerns the scalable suitable amplitude by dividing potential drop, delivers to follow-up A/D converter 2 then and carries out analog to digital conversion, becomes digital signal.On the other hand, as long as doughnut motion, vibration transducer 11 in the motion perception triggering power supply unit 5 just sensing goes out the simulating signal of variation, carry out the amplitude limit shaping through pulsation amplitude limit Schmidt shaping stage 12, the fluctuating signal of output peak clipping, charge and discharge process through level output rc smoothing filter 13 carries out smoothing processing again, form DC level, trigger pip as level triggers formula electronic switch 14, make the 14 closed or disconnections of level triggers formula electronic switch, thereby can realize power supply control internal electric source.
Because the inside tires power supply 7 of native system is placed in inside tires, on the circuit mechanism to power supply take adaptive control, the consumption of saving power supply as far as possible is an important technique measure wherein.Brake operating based on automobile is to take place at random in the driving process, so will keep the state of a kind of servo sample and processing to the tire radial acceleration, acceleration sensing signal element 1, A/D converter 2, wheel speed are changed all essential power supply of central controlled processing unit 3 threes at this moment, make it in running order.The power supply side of this three part is connected to the motion perception simultaneously triggers power supply unit 5, as long as automobile one moves, the vibration transducer 11 that the motion perception triggers in the power supply unit 5 just can produce electric signal, carry out amplitude limit shaping and smoothing processing respectively through pulsation amplitude limit Schmidt's shaping stage 12 and level output rc smoothing filter 13, form the triggering level signal, make level triggers formula electronic switch 14 closures, connect inside tires power supply 7, to the power supply of above-mentioned three working cells; Otherwise when automobile stops or parking the not time spent, vibration transducer 11 can not produce electric signal, consequently makes level triggers formula electronic switch 14 be in off-state, has cut off the power supply to above-mentioned three working cells, thereby can save electrical source consumption.
On the other hand, braking-distance figures transmission transmitter unit 4 is to want the much bigger power supply energy of other circuit unit of consumption rate in the emission duty, but needn't transmit data to the outside continuously during owing to automobile normal running, having only just need be to the instantaneous braking characteristic data of external emission when brake operating takes place, therefore the power supply side of braking-distance figures transmission transmitter unit 4 is connected to the braking perception and triggers power supply electronic switch 6, control is carried out in power supply by 6 pairs of inside tires power supplys 7 of electronic switch, power supply is only just connected in the moment of needs emission data, and the output level that the keying of braking perception triggering power supply electronic switch 6 is subjected to wheel speed to change central controlled processing unit 3 is controlled, change central controlled processing unit 3 when wheel speed and recognize the tire linear velocity when dropping to the preset threshold value that braking takes place, trigger power supply electronic switch 6 to the braking perception and send triggering level, make electronic switch 6 closures, inside tires power supply 7 is just to 4 power supplies of braking-distance figures transmission transmitter unit, simultaneously the braking characteristic data of braking moment are sent to braking-distance figures transmission transmitter unit 4, make it outside emission.When wheel speed is changed data that central controlled processing unit 3 transmits and is finished, its triggering level that outputs to braking perception triggering power supply electronic switch 6 disappears thereupon, the braking perception triggers power supply electronic switch 6 and disconnects, cut off the power supply of 7 pairs of braking-distance figures transmission of tire internal electric source transmitter unit 4, emission work is stopped, thereby can save electrical source consumption.
As shown in Figure 4, in the two-dimensional coordinate system, the longitudinal axis is represented the linear velocity v of tire motion, transverse axis express time t.Begin the period to t1 from motion, linear velocity v upwards increases; Represent uniform motion at t1 to the t2 period; Be carved into during from t2 that braking procedure takes place in the braking time interval that motion stops, tire linear velocity v descends sharply.Braking characteristic can adopt the mean value of tire maximum deceleration a in the braking time interval as criterion usually, and retarded velocity a can convert out by the relation of linear velocity v in theory.
As shown in Figure 5, one-dimensional acceleration transducer on the wheel hub is because of being subjected to the influence of gravity in vertical direction, the waveform of the radial acceleration signal ar of its output presents periodic peak valley alternation fluctuation status with the rotation of tire, and the frequency of radial acceleration can change with the speed of tire motion simultaneously.Shown in the figure when the tire uniform motion output signal frequency and curve shape keep constant in the horizontal direction; Movement velocity descends soon more during braking, and then thin more the and curve shape of radial acceleration signal frequency change descends soon more, is the envelope shape of radial acceleration signal ar shown in the dotted line among the figure, with tire linear velocity v shape basically identical shown in Figure 4.The present invention outwards transmits wherein starting the tire linear velocity v that envelope characterized of signal to the period that stops of t2 constantly from automobile brake, makes follow-up acceleration fully and converts to handle and judge for the security of braking ability numerical basis is provided.
In the present embodiment, one-dimensional acceleration transducer 8 adopts the ADXL190 type, and simulating signal operational amplifier 9 and amplitude adjusted are penetrated with isolation level 10 and be double operational LM2904 type; Vibration transducer 11 can adopt the ADXL311 type, and pulsation amplitude limit Schmidt shaping stage 12 is the CD4093 type, and level output rc smoothing filter 13 is made up of pure resistance and electric capacity, and level triggers formula electronic switch 14 is the TWH8778 type; D/A switch unit 2 is the AD7705 type, wheel speed is changed central controlled processing unit 3 and is the P89LPC936 type, braking-distance figures transmission transmitter unit 4 is the CC1000 type, and it is the TWH8778 type that the braking perception triggers power supply electronic switch 6, and inside tires power supply 7 can adopt lithium button cell associating power supply.Adopt assembly language establishment wheel speed to change handling procedure in the central controlled processing unit 3, then total system is placed on the wheel hub in the tire, carry out running test on the spot, just can implement the present invention preferably.
Claims (3)
1. automobile type built-in contactless brade sensing system is characterized in that: described system changes central controlled processing unit, braking-distance figures transmission transmitter unit, motion perception and triggers that power supply unit, braking perception trigger the power supply electronic switch, the inside tires power sourced electric constitutes by being installed in acceleration sensing signal element, A/D converter, wheel speed on the doughnut inner wheel hub; Described acceleration sensing signal element is connected with A/D converter by output signal line; A/D converter is changed central controlled processing unit by output signal line and wheel speed and is connected; Wheel speed is changed central controlled processing unit and is connected with braking-distance figures transmission transmitter unit, braking perception triggering power supply electronic switch respectively by output signal line; The inside tires power supply triggers power supply unit with the motion perception respectively, the braking perception triggers the power supply electronic switch and is connected; The output signal line that the motion perception triggers power supply unit is connected with the feeder ear that acceleration sensing signal element, A/D converter, wheel speed are changed central controlled processing unit respectively; The output signal line that the braking perception triggers the power supply electronic switch is connected with the feeder ear of braking-distance figures transmission transmitter unit.
2. a kind of automobile type built-in contactless brade sensing system according to claim 1 is characterized in that: acceleration sensing signal element is regulated to penetrate with isolation level is common electric by one-dimensional acceleration transducer, simulating signal computing amplifier stage, amplitude and is constituted; Described one-dimensional acceleration transducer is connected with simulating signal computing amplifier stage by output signal line; Described simulating signal computing amplifier stage is regulated to penetrate with isolation level with amplitude by output signal line and is connected.
3. a kind of automobile type built-in contactless brade sensing system according to claim 1 is characterized in that: the motion perception triggers power supply unit and electricly constitutes by vibration transducer, pulsation amplitude limit Schmidt shaping stage, level output rc smoothing filter, level triggers formula electronic switch are common; Described vibration transducer is connected with pulsation amplitude limit Schmidt shaping stage by output signal line; Described pulsation amplitude limit Schmidt shaping stage is connected with level output rc smoothing filter by output signal line; Described level output rc smoothing filter is connected with level triggers formula electronic switch by output signal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100375520A CN100357982C (en) | 2005-09-28 | 2005-09-28 | Automobile type built-in contactless brade sensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100375520A CN100357982C (en) | 2005-09-28 | 2005-09-28 | Automobile type built-in contactless brade sensing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1744145A true CN1744145A (en) | 2006-03-08 |
| CN100357982C CN100357982C (en) | 2007-12-26 |
Family
ID=36139494
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100375520A Expired - Fee Related CN100357982C (en) | 2005-09-28 | 2005-09-28 | Automobile type built-in contactless brade sensing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100357982C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401740A (en) * | 2010-09-17 | 2012-04-04 | 深圳市加力尔电子科技有限公司 | Intelligent vehicle debugging method, server and debugging instrument of tire pressure monitoring system |
| CN102529850A (en) * | 2012-01-16 | 2012-07-04 | 华南理工大学 | Safe state monitoring method of motor vehicle based on wheel load type intelligent sensing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2514640B1 (en) * | 2001-12-21 | 2015-08-05 | Kabushiki Kaisha Bridgestone | Method and apparatus for estimation of road condition and tire running state, ABS and car control making use thereof |
| CN1307064C (en) * | 2002-03-28 | 2007-03-28 | 倍耐力轮胎公司 | Method and system for monitoring state of tyre during running of motor vehicle |
| CN1292237C (en) * | 2003-10-29 | 2006-12-27 | 上海西派埃自动化仪表工程有限责任公司 | Portable brake performance measuring instrument |
| CN2711715Y (en) * | 2004-07-07 | 2005-07-20 | 李冠文 | Pressure temperature voltage sensing transmitter for tyre tester |
-
2005
- 2005-09-28 CN CNB2005100375520A patent/CN100357982C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401740A (en) * | 2010-09-17 | 2012-04-04 | 深圳市加力尔电子科技有限公司 | Intelligent vehicle debugging method, server and debugging instrument of tire pressure monitoring system |
| CN102529850A (en) * | 2012-01-16 | 2012-07-04 | 华南理工大学 | Safe state monitoring method of motor vehicle based on wheel load type intelligent sensing |
| CN102529850B (en) * | 2012-01-16 | 2014-06-25 | 华南理工大学 | Safe state monitoring method of motor vehicle based on wheel load type intelligent sensing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100357982C (en) | 2007-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101716873B (en) | Method for monitoring tire burst or severe air leakage of vehicle | |
| CN1257065C (en) | Low-power consumption system for monitoring pressure in tyre | |
| CN103043049A (en) | Vacuum brake boosting control system and vacuum brake boosting control method for electric cars | |
| CN201800469U (en) | Solar automobile tire pressure monitoring system | |
| CN203254902U (en) | Intelligent monitoring system for tire pressure | |
| CN111516661B (en) | Distributed anti-skid control method and device for railway vehicle | |
| CN100357982C (en) | Automobile type built-in contactless brade sensing system | |
| CN111907269A (en) | Vehicle state detection system based on intelligent tire technology | |
| CN203046766U (en) | Tire pressure and temperature monitoring device for tire based on singlechip microcomputer | |
| CN206972804U (en) | Friction plate, brake, wear warning of friction plate system and automobile | |
| CN112223962A (en) | Intelligent vehicle control system and method based on road surface touch perception | |
| CN110979383A (en) | Train buffer structure state monitoring system with low power consumption | |
| CN202413784U (en) | Tire pressure detection function integrated controller for automobile electronic stability system | |
| CN107042854A (en) | A kind of battery-operated motor cycle vehicle condition monitoring system | |
| CN217170388U (en) | Non-motor vehicle tire pressure monitoring system and non-motor vehicle | |
| CN103776402A (en) | Train overhead contact system hard spot detection device based on acceleration detection and Bluetooth technique | |
| CN101311693A (en) | Enhancement type tire pressure monitoring system and control method | |
| CN203391574U (en) | Traffic safety control system based on tire pressure monitoring | |
| CN203063595U (en) | Tire pressure monitoring device of mining vehicle | |
| CN205674879U (en) | A kind of pantograph pan abrasion on-line early warning device | |
| CN203560341U (en) | Caliper temperature display device | |
| CN206664173U (en) | A kind of system for detecting tire pressure based on bluetooth 4.0 | |
| CN203376790U (en) | Vehicle data acquiring and sending device | |
| CN201525292U (en) | Drunken driving speed limiting device | |
| CN206030971U (en) | Vehicle tyre intelligent monitoring system based on CAN bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071226 Termination date: 20100928 |