CN202029798U - Vehicle rollover early-warning system - Google Patents
Vehicle rollover early-warning system Download PDFInfo
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- CN202029798U CN202029798U CN2011201260949U CN201120126094U CN202029798U CN 202029798 U CN202029798 U CN 202029798U CN 2011201260949 U CN2011201260949 U CN 2011201260949U CN 201120126094 U CN201120126094 U CN 201120126094U CN 202029798 U CN202029798 U CN 202029798U
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Abstract
The utility model discloses a vehicle rollover early-warning system, which comprises a microprocessor unit and a power supply, the microprocessor unit is connected with the power supply, and the vehicle rollover early-warning system is characterized in that the microprocessor unit is connected with a left steel plate spring strain sensor, a right steel plate spring strain sensor, a lateral acceleration sensor and an alarm system. Since the technical scheme is adopted, compared with the prior art, the vehicle rollover early-warning system adopts the structure in which the strain sensors on steel plate springs and the lateral acceleration sensor are connected with the microprocessor unit, and the microprocessor unit is utilized to judge the signals transmitted by the sensors and control the alarm system to operate according to a judged result. The structure of the vehicle rollover early-warning system is simple, the technologies of the adopted elements are mature, the size is small, the reliability of operation is high, the structures of conventional vehicle models do not need to be altered a lot, and the vehicle rollover early-warning system is suitable for various models of new and old vehicles, and can remarkably increase the driving safety of vehicles.
Description
Technical field
The utility model relates to a kind of safety early warning device, particularly a kind of device of early warning vehicle rollover.
Background technology
Along with the continuous development of Domestic Automotive Industry and the improvement of road traffic facility, automobile driving speed improves constantly, and causes the generation of a large amount of traffic accidents, causes casualties and enormous economic loss, therefore, running safety more and more is subject to people's attention.Some automobiles such as truck tanker, medium and heavy lorry, heavy semi-trailer etc. are because characteristics such as its centroid position height, quality and volume be bigger, at tempo turn and bend diameter the rollover accident hour take place very easily.Hazard rating according to U.S.'s highway traffic safety Public Roads Administration (NHTSA) accident that vehicle rollover causes is only second to the caused accident of vehicle collision, occupies second.Europe and North America statistics of traffic accidents the analysis showed that vehicle side turning accounts for and causes 5% of personal injury traffic accident, account for 20% of the traffic accident that there is the personnel death.The vehicle of vehicle rollover rotates vehicle rollover around the longitudinal axis in the process of moving and is meant that vehicle rotates 90 ° or bigger angle around the longitudinal axis in the process of moving, so that the contacted dangerous sideway movement of vehicle body and ground.Vehicle rollover generally is divided into two kinds: a kind of is to trip rollover, and lateral sliding promptly takes place during vehicle ', with obstacle lateral impact on the road surface it " is tripped "; A kind of is the rollover that curvilinear motion causes, promptly vehicle is when travels down, and the vehicle lateral acceleration surpasses the rollover threshold value, and the vertical antagonistic force of inboard wheel causes rollover when being zero.The factor that influences vehicle rollover is a lot, is divided into two big classes usually: the one, with the static factor of automobile design relating to parameters, as height of center of mass, wheelspan, suspension and tire characteristics etc.; The 2nd, the different factor with running car, as driver's the pattern that turns to, the shape of road surface and adhesion value, automobile carrying pattern has accessible etc. on the road surface.For example in the jar of tank lorry during filled with fluid, the quality of fluid cargo is uniformly distributed in the jar, and the rollover characteristic of vehicle is basic identical during with transportation equivalent solid goods.But when jar in be the part cargo shipment fluid cargo and turn to when travelling, because the flowing power of liquid, pot liquid will rock, under the effect of gravity and force of inertia etc., the centroid position of car load also will change, the rollover characteristic of tank lorry is affected, and its rollover threshold value reduces, and causes the generation of rollover accident easily.At present, Chinese patent publication number CN2825373Y, name is called the application case of " dumping car anti-rollover warning device ", the actual conditions when it is characterized in that adopting the two-way switch of inclination to work according to dumping car, the horizontal ramp angles of perception is two different angles closed conductings respectively.Carry out current limliting with resistance, the light-emitting diode of high brightness and buzzer phone carry out the sound and light alarm prompting to switch of inclination institute perception ramp angles, and this systemic-function is single, adopt mechanical switch, measuring reliability is poor, and the automobile kind of measurement is single, has limited popularizing and using of system.Traditional inclination measurement mechanism is the angle of roll of simple measured automobiles or the lateral acceleration of simple measured automobiles.And the angle of roll experiment value of automobile and actual inclination value differ greatly, and can accurately not judge whether automobile reaches the inclination condition.The utility model adopts measures lateral acceleration and two values of the transverse load rate of transform simultaneously as the condition of estimating automobile roll, makes result of a measurement more accurate, and reliability is stronger.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of device of early warning vehicle rollover is provided, and its accuracy is good, good reliability and have general usability, to overcome the deficiencies in the prior art.
The device that is achieved in that the early warning vehicle rollover of the present utility model, it comprises microprocessing unit, power supply, microprocessing unit is connected with power supply, is connected with left side steel spring strain sensor, right side steel spring strain sensor, lateral acceleration sensor and warning device on microprocessing unit.
Warning device comprises annunciator, safety lamp, warning light, alarm lamp and telltale.
The utility model is at testing vehicle on basis of experimental, vehicle both sides spring deflection and lateral acceleration feature during according to the critical rollover of vehicle, utilization stress strain gauge and lateral acceleration sensor and combined with intelligent controller are to the detection of turning on one's side of the vehicle in travelling, when vehicle has rollover trend, chaufeur is carried out sound and light alarm, make chaufeur take measures such as Reduced Speed Now to avoid the generation of rollover accident, or provide the rollover early warning signal for later anti-rollover device.
Specifically, main basis for estimation is judged vehicle rollover for utilizing the transverse load transfer case, the warning algorithm of promptly turning on one's side, the rollover warning algorithm is estimated the transverse load transfer case and the transverse load rate of transform by the ratio of the steel spring deformational stress value of vehicle both sides.
Transverse load rate of transform LLTR(Lateral Load Transfer Rate) be defined as: the difference of the vertical load on the wheel of vehicle both sides and the ratio of vertical load sum are shown below:
In the formula, F
LiBe the vertical load on the vehicle left side wheel; F
RiBe the vertical load on the vehicle right side wheels; I and n are respectively the position of axle and total axletree number.Last root axletree that we pick up the car in the utility model is i=1, gets an axletree, calculate simple and convenient, during because of vehicle rollover last root axletree at first Y turn on one's side and become to having inclination trend, therefore, last root axletree is calculated.
In addition, the utility model also uses the side direction of lateral acceleration sensor monitors vehicle to quicken, and the rollover condition is carried out the supplementary sum correction.Some extraordinary circumstances in the vehicle ' process, when passing through bigger convex closure, pit and bevelled road surface as vehicle, can produce bigger influence to the transverse load rate of transform of vehicle, if only use the transverse load rate of transform as the rollover factor, then warning is easy to generate wrong report.The utility model utilization transverse load rate of transform and lateral acceleration have only when the measured value of two factors all surpasses predetermined threshold value as the rollover factor, and warning device just can be reported to the police.Compare the shortcoming of having broken away from the low and poor reliability of actual accuracy that the single rollover factor brings with other rollover forewarn system, because the utility model calculates the transverse load rate of transform by the steel spring deformational stress value of measuring the vehicle both sides, therefore be applicable to that all are with the vehicle of steel spring as the suspension system elastic element.
Microprocessing unit is judged the motoring condition of vehicle by the data of obtaining sensor monitors, sensor is sent to microprocessing unit with real-time data monitored, microprocessing unit is brought these data into and is set in advance in microprocessing unit in-to-in program, calculate the transverse load rate of transform and compare with lateral acceleration value and the rollover threshold value that is preset in the microprocessing unit program, if less than the rollover threshold value, warning device is not reported to the police; If greater than the rollover threshold value, show that then vehicle has rollover trend, warning device begins to report to the police.
Principle of work of the present utility model as shown in Figure 2, when starting vehicle, microprocessing unit starts, and begins to receive the signal that comes from sensor output.Microprocessing unit can detect the next data of steel spring strain sensor transmission of both sides in real time during work, and the existing program of this data substitution, calculates the transverse load rate of transform.Simultaneously, microprocessing unit can real-time detection side transmit the lateral acceleration value of coming to acceleration pick-up, microprocessing unit compares these two values and predetermined threshold value, when this two values during all greater than default rollover threshold value, microprocessing unit will be opened the switch of warning device, warning device is started working and is carried out acousto-optic, and promptly annunciator sends the warning buzzing, the alarm lamp flicker.
The right half part of principle of work Fig. 2 is the back work part: the effect of this part is the ratio that calculates the load of vehicle both sides, and informs the driver by attention display.When goods is put inequality or because the goods in transit position changes when the load proportion that causes the vehicle both sides is too lacked of proper care, the driver will remind in system.The foundation of the ratio of the load of judgement vehicle both sides is the ratio of comparison vehicle both sides steel spring deformational stress value, and its condition precedent is that vehicle ' is steady, and promptly lateral acceleration approaches 0 state.Shown in Figure 2 as principle, when microprocessing unit detects steel spring deformation and does not recover initial value, detection side judges to acceleration pick-up whether lateral acceleration approaches 0 again, if, microprocessing unit will detect and contrast the steel spring deformational stress value of both sides, and institute is calculated on the ratio display alarm telltale, and then judges the whether excess of stroke of this ratio, if the excess of stroke, the forecast warning lamp will glimmer to remind the driver.
Owing to adopted technique scheme, compared with prior art, strain sensor that the utility model goes out steel spring and lateral acceleration sensor are connected the structure on the microprocessing unit, utilize microprocessing unit that the signal that the signal of sensor sends is differentiated, and carry out work according to differentiation situation control warning device; The utility model is estimated the transverse load transfer case by the ratio of the steel spring adaptability to changes of both sides, and adopt lateral acceleration that the transverse load rate of transform is revised, taken all factors into consideration the transverse load rate of transform and the lateral acceleration rollover factor, prevent the flase alarm that the analogue under the vehicle actual travel situation causes the interference of transverse load rate of transform judge index and report to the police too early, improved the low and antijamming capability of border accuracy of reporting to the police greatly, practice is strong.The utility model is simple in structure, institute's employing components and parts technology maturation, and volume is little, and the functional reliability height need not existing vehicle is carried out big structural modification, is fit to all kinds and new old vehicle, has significant effect for the driving safety that improves vehicle.
Description of drawings
Accompanying drawing 1 is a structural representation of the present utility model;
Accompanying drawing 2 is a fundamental diagram of the present utility model;
Accompanying drawing 3, accompanying drawing 4 are steel spring strain sensor and microprocessing unit junction circuit figure;
Accompanying drawing 6 is alarm circuit figure;
Accompanying drawing 7 is safety etc., warning light and alarm lamp circuit diagram;
Accompanying drawing 8 is the attention display circuit diagram.
The specific embodiment
Embodiment of the present utility model: the structure of the device of early warning vehicle rollover as shown in Figure 1, adopt the STC89C52 micro controller system as microprocessing unit 1, it is connected with power supply 2, on microprocessing unit 1, connects left side steel spring strain sensor 3, right side steel spring strain sensor 4, lateral acceleration sensor 5 and warning device; Warning device comprises annunciator 6, safety lamp 7, warning light 8 and alarm lamp 9 and telltale 10; Adopt the communication signal line to be connected between each parts and the microprocessing unit 1.
Claims (2)
1. the device of an early warning vehicle rollover, it comprises microprocessing unit (1), power supply (2), microprocessing unit (1) is connected with power supply (2), it is characterized in that: be connected with left side steel spring strain sensor (3), right side steel spring strain sensor (4), lateral acceleration sensor (5) and warning device on microprocessing unit (1).
2. the device of early warning vehicle rollover according to claim 1 is characterized in that: warning device comprises annunciator (6), safety lamp (7), warning light (8), alarm lamp (9) and telltale (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201260949U CN202029798U (en) | 2011-04-26 | 2011-04-26 | Vehicle rollover early-warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201260949U CN202029798U (en) | 2011-04-26 | 2011-04-26 | Vehicle rollover early-warning system |
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| CN202029798U true CN202029798U (en) | 2011-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201260949U Expired - Fee Related CN202029798U (en) | 2011-04-26 | 2011-04-26 | Vehicle rollover early-warning system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102922999A (en) * | 2012-10-17 | 2013-02-13 | 重庆交通大学 | Vehicle dangerous driving state recognition device and recognition method for mountain highway |
| CN103465905A (en) * | 2013-10-11 | 2013-12-25 | 贵州大学 | Car side turning prevention early warning method and early warning system based on air spring |
| CN103625360A (en) * | 2012-08-29 | 2014-03-12 | 交通运输部公路科学研究所 | Car rollover stability performance dynamic monitoring and alarming system |
| CN104228739A (en) * | 2013-06-08 | 2014-12-24 | 北汽福田汽车股份有限公司 | Dump truck side turning preventing method and device |
| CN117541066A (en) * | 2024-01-09 | 2024-02-09 | 巨野金牛车业有限公司 | Dump semitrailer rollover evaluation index and evaluation method |
-
2011
- 2011-04-26 CN CN2011201260949U patent/CN202029798U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103625360A (en) * | 2012-08-29 | 2014-03-12 | 交通运输部公路科学研究所 | Car rollover stability performance dynamic monitoring and alarming system |
| CN102922999A (en) * | 2012-10-17 | 2013-02-13 | 重庆交通大学 | Vehicle dangerous driving state recognition device and recognition method for mountain highway |
| CN104228739A (en) * | 2013-06-08 | 2014-12-24 | 北汽福田汽车股份有限公司 | Dump truck side turning preventing method and device |
| CN104228739B (en) * | 2013-06-08 | 2016-12-07 | 北汽福田汽车股份有限公司 | A kind of dumper anti-rollover method and device |
| CN103465905A (en) * | 2013-10-11 | 2013-12-25 | 贵州大学 | Car side turning prevention early warning method and early warning system based on air spring |
| CN117541066A (en) * | 2024-01-09 | 2024-02-09 | 巨野金牛车业有限公司 | Dump semitrailer rollover evaluation index and evaluation method |
| CN117541066B (en) * | 2024-01-09 | 2024-03-29 | 巨野金牛车业有限公司 | Dump semitrailer rollover evaluation index and evaluation method |
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| 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: 20111109 Termination date: 20140426 |