CN201745529U - Automobile driving assisting system - Google Patents
Automobile driving assisting system Download PDFInfo
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- CN201745529U CN201745529U CN2010202549877U CN201020254987U CN201745529U CN 201745529 U CN201745529 U CN 201745529U CN 2010202549877 U CN2010202549877 U CN 2010202549877U CN 201020254987 U CN201020254987 U CN 201020254987U CN 201745529 U CN201745529 U CN 201745529U
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Abstract
The utility model relates to an automobile driving assisting system, which comprises a host machine, an actuating mechanism and a sensing circuit; the host machine comprises a central processor, an input interface circuit and an output interface circuit; the sensing circuit comprises a steering wheel angle sensing circuit, a short-range finder, a long-range finder and an automobile speed sensing circuit; the actuating mechanism comprises a baking control mechanism and an oil circuit control mechanism; the central processor is respectively connected with the input interface circuit and the output interface circuit through a data bus; and the steering wheel angle sensing circuit, a longitudinal/transverse acceleration sensing circuit, the short-range finder, the long-range finder and the automobile speed sensing circuit are respectively connected with the input interface circuit. Since the acoustic, optical and electric sensing technologies are organically combined with the computer technology, the automobile driving assisting system has the advantages of high intelligence, sensitivity and reliability, and can be used in all weather conditions; and on the premise without changing the structure and the performance of the original automobile, the automobile installed with the system can become an intelligent automobile, and has the functions of active collision avoidance, automatic warning and aided driving.
Description
Technical field
The utility model relates to a kind of automobile driving system, especially relates to a kind of automobile driving assisting system.
Background technology
Along with improving constantly of numerous common people's quality of life, and the quickening of rhythm of life frequency, various automobiles more and more become the main stream traffic instrument that the different personages of stratum participate in social activities and logistics delivery.Therefore people rely on automobile, because it has brought conveniently life, have enlarged the people's activities scope, have extended people's the visual field.When yet automobile brought convenience quick life to people, traffic accident in also like the shadow following the person association, and traffic accident not only brings material damage, also people's life security was brought baneful influence, went back entail dangers to life when serious.
In order to reduce the incidence of traffic accident, automobile must rely on certain equipment to measure the distance of the place ahead obstacle, and feed back to automobile rapidly, with under critical situation, by reporting to the police or carrying out a certain operation (as emergency braking etc.) that presets automatically, avoid the traffic accident of breaking and being caused because of driver fatigue, carelessness, erroneous judgement.According to statistics, during dangerous circumstances,, then can reduce 30% of rear-end collision respectively, 50% of the relevant accident in road surface, head-on 60% of car accident if can give the pretreatment time of chaufeur half second.
For this reason, people have studied a lot of technical schemes and have attempted to address the above problem, a kind of infrared laser full automatic car anticollision device is disclosed as Chinese patent (CN90218403.2), according to this scheme implementation, because infrared laser is subject to disturb, and do not have powerful computer technology, sensing technology in the scheme as guarantee, its effect is must not can desirable.
Summary of the invention
The utility model purpose provides a kind of automobile driving assisting system.In order to solve generation because of driver fatigue, carelessness, the disconnected traffic accident that is caused of erroneous judgement.
For achieving the above object, the technical scheme that the utility model adopted is: automobile driving assisting system comprises main frame, actuating unit, sensing circuit, described main frame comprises central process unit, input interface circuit, output interface circuit, sensing circuit comprises steering wheel angle sensing, short range apomecometer and long distancemeter, vertically/and the transverse acceleration sensing circuit, speed of a motor vehicle sensing circuit; Actuating unit comprises brake control mechanism and oil circuit control mechanism; Wherein central process unit is connected with the input and output interface circuit by data bus; Steering wheel angle sensing, vertically/transverse acceleration sensing circuit, short range apomecometer be connected with input interface circuit respectively with long distancemeter, speed of a motor vehicle sensing circuit; Described brake control mechanism is connected with output interface circuit by driving circuit with the oil circuit control mechanism.
As preferably, described short range apomecometer comprises micro controller system, ultrasonic transducer, emission driving circuit, multiplexer circuit, signal conditioning circuit, described ultrasonic transducer is connected with multiplexer circuit through the emission driving circuit, one branch road of multiplexer circuit is connected with single machine output end, and another branch road is connected with input of single chip through signal conditioning circuit.
As preferably, described long distancemeter adopts millimeter wave radar or range laser radar.
As preferably, described central process unit also is connected with telltale with voice warning circuit by output interface circuit.
During the utility model work, system is according to the distance of the automatic probe vehicles of speed of a motor vehicle the place ahead obstacle, as can auto alarm when constituting a threat to, and the prompting navigating mate is taked corresponding measure, do not take corresponding measure as navigating mate, this system avoids automobile and obstacle to bump against control oil channel automatic deceleration or self-actuating brake, realizes initiatively crashproof, to guarantee the safety of people's car, when obstacle did not constitute a threat to, system made automobile be in normal condition, and did not influence this vehicle speed increase and overtake other vehicles.
The utility model organically combines sound, light, fax sense technology and computer technology, has intelligent degree height, highly sensitive, advantages such as reliability is high, all-weather service.Under the prerequisite that does not change primary car structure and performance, the automobile that native system is installed can become intelligent vehicle, not only has initiatively crashproof, auto alarm function, and also has the function of driver assistance, and navigating mate can be according to the demand of oneself, the warning of custom-built system, brake function.Therefore of the present utility model applying will alleviate the labour intensity of navigating mate greatly.
Description of drawings
Below in conjunction with the drawings and specific embodiments, the technical solution of the utility model is described in further detail.
Fig. 1 is a schematic block circuit diagram of the present utility model;
Fig. 2 is the schematic block circuit diagram of short range apomecometer shown in Figure 1;
Fig. 3 is a flow chart of the present utility model.
The specific embodiment
Fig. 1 is schematic circuit diagram of the present utility model.This automobile driving assisting system comprises main frame, actuating unit, sensing circuit etc.
Wherein main frame comprises central process unit, bus, memory device, input interface circuit, output interface circuit, power supply etc.Sensing circuit comprises steering wheel angle sensing, long distancemeter and short range apomecometer, vertically/and the transverse acceleration sensing circuit, speed of a motor vehicle sensing circuit, power supply etc.Actuating unit comprises brake control mechanism and oil circuit control mechanism.
Vertically/and the transverse acceleration sensing circuit comprises that collection micromechanics formula longitudinal acceleration sensor, micromechanics formula lateral acceleration sensor are acceleration sensing module, the filter circuit of one, filter circuit uses the amplifier integrated package MX324 of full amplitude of oscillation output.
Steering wheel angle sensing comprises steering wheel angle sensor, parameter comparator circuit, A/D change-over circuit, and steering wheel angle sensor adopts the optical code disk formula.Optical code disk is a kind of non-contacting active angular transducer, and the signal of its output generally is treated digital signal.
The sensor signal of speed of a motor vehicle sensing circuit directly obtains from the tach signal of change speed gear box or from ECU and signal after treatment.Vehicle speed signal is if digital signal can directly be imported central process unit, and vehicle speed signal is if frequency pulse needs through handle back input central process unit through signal condition, A/D change-over circuit.
Central process unit is connected with output interface circuit with input interface circuit by data bus; Steering wheel angle sensing is connected with input interface circuit through parameter comparator circuit, A/D change-over circuit; Long distancemeter is connected with input interface circuit with the short range apomecometer; Acceleration sensor module wave circuit after filtration is connected with central processor, and the brake control mechanism is connected with output interface circuit by driving circuit with the oil circuit control mechanism, and central process unit also is connected with telltale with voice warning circuit by output interface circuit.
Fig. 2 is the schematic block circuit diagram of short range apomecometer.This short range apomecometer comprises micro controller system, left and right side's ultrasonic transducer, rear (also can be arranged to a left side, back, the right side, back) ultrasonic transducer, the emission driving circuit, multiplexer circuit, signal conditioning circuit, described ultrasonic transducer is connected with multiplexer circuit through the emission driving circuit, and a branch road of multiplexer circuit is connected with single machine output end, and another branch road is connected with input of single chip through signal conditioning circuit.
Multiplexer circuit can adopt the CD4052 integrated package, and micro controller system can adopt the PIC16C54 chip, and super sonic sends impulse singla and sent by the RA2 mouth of micro controller system PIC16C54, and its pulse width and transmission are at interval by software control.The short range apomecometer adopts time-sharing work, finds range by left, back (left side, the right side, back perhaps), right sequential loop.If, then before the Hou Yilu ultrasonic beam is sent, should receive the backward wave that beam back on last road, otherwise think last road clear effectively in the finding range obstacle being arranged.Left and right side's ultrasonic transducer finding range is that 0.05～10m, rear ultrasonic transducer finding range are 0.5～10m.Because under distance situation far away, the echo of sound is very weak, thereby it is also less to be converted to the amplitude of electric signal, signal conditioning circuit amplifies tens0000 times with signal for this reason.Signal conditioning circuit can adopt by 2 high speed and precision amplifier NE5532 and constitute second amplifying circuit, square-wave signal of AC signal shaping output after the amplification, micro controller system detects square-wave signal with inquiry mode, the time count halted device, read count value, and converse the distance of this car to obstacle in conjunction with temperature.
Long distancemeter adopts existing millimeter wave radar or range laser radar, and finding range is 0.5～300m.Wherein millimeter wave radar mainly is grouped into by antenna, high frequency circuit and signal processing part.Target range that signal processing obtains and target speed of relative movement are sent into central process unit.Radar system is outwards launched a row continuous frequency modulation millimeter wave by antenna, and the reflected signal of receiving target.Backward wave is identical with the shape of emitted wave, but a delay was arranged on the time, transmit to be the intermediate-freuqncy signal frequency of mixing output with reflected signal difference on the frequency at a time, and target range is directly proportional with the IF-FRE of front end output.If reflected signal, then comprises a caused Doppler frequency-shift of the relative motion by target from the target of a relative motion in the reflected signal.Just can calculate target range and target speed of relative movement according to the multispectral principle of reining in.
Range laser radar comprises controller, laser emission part, laser pick-off parts, the transmitting instructions that described laser emission part reception controller sends goes out laser, the laser pick-off parts, receive the reflected light of the place ahead object simultaneously, and reflected light reflexed to described laser pick-off parts, the light that the laser pick-off parts will receive is converted to electric signal and outputs to controller, handles the target range and the target speed of relative movement that obtain through controller and sends into central process unit.
Fig. 3 is a flow chart of the present utility model.With reference to figure 3 as can be known, the vehicle speed data that system utilizes speed of a motor vehicle sensing circuit to obtain, closely, long distancemeter records the roadblock of different levels position and the nuance data of this following distance size in length and breadth, and this car vertically/the transverse acceleration sensing circuit records data such as acceleration signal (road conditions jolt situation).Behind central process unit, treater compares these information and canned data with these data delivery in system.Central process unit can judge that according to the program of enrolling in advance current driving states is fairground pattern or highway pattern, enters the straight-line travelling state then under selected pattern, i.e. the straight-line travelling pattern.Under the straight-line travelling pattern, central process unit screens the roadblock range data nearest apart from this car, brake distance value in conjunction with the present speed value that speed of a motor vehicle sensing circuit transfers according to the standard under several groups of speed that store in the central process unit, judgement should be selected for use great with vehicle speed.As: current excessive with vehicle speed, travel down like this, in the time of may having knock into the back dangerous, central process unit can send the instruction warning and slow down, and reaches safe following distance.
In the highway pattern: in this car has entered the distance that may cause danger, front vehicles and other roadblocks reached this car present speed appraise and decide safe stopping distance the time, but the driver does not also make under the timely disposition, system can report to the police or make braking deceleration even emergency brake immediately and handle, to avoid colliding or a chain of accident of colliding takes place.Especially on express highway, the driver because of have a dense fog, reason such as smog roadblock be can't see vehicle on the road ahead or during other roadblocks such as construction marker, whether the place ahead apomecometer can be measured the place ahead at any time has vehicle ' or other roadblocks to block existing road, and the range information of each roadblock or vehicle in time passed to central process unit, central process unit is appraised and decided stopping distance according to current car value.
In the pattern of fairground: vehicle the fairground road travel or etc. during traffic lights, central process unit screens the roadblock range data nearest apart from this car, brake distance value in conjunction with the present speed value that speed of a motor vehicle sensing circuit transfers according to the standard under several groups of speed that store in the central process unit, keep the minimum stopping distance between this car and front truck or personnel or roadblock.
When turning to, the information of the bearing circle deflection angle that a left side or the bright lamp of right steering lamp and steering wheel angle sensor transmit can be passed to central process unit, central process unit is according to current vehicle speed (highway pattern or fairground pattern), to the roadblock that the place ahead occurs, take to be different from the roadblock stopping distance under the straight line pattern state.
Entering when turning to pattern, as only steering indicating light is bright, and vehicle does not travel, and system can do to wait for that driving handles; Bright as steering indicating light, the vehicle straight-line travelling, then the wait diversion treatments can be done by system;
When steering indicating light is bright, and steering wheel angle turns to certain angle, and system just enters the pattern that turns to: in this pattern, system can point out navigating mate to note, and according at that time the speed of a motor vehicle, suitably carries out decelerating turn.As in the turning process, if the headstock distance turns to the object of a side nearer, when having only 0.4m, system can do self-actuating brake and handle.
If steering indicating light is bright, the vehicle straight-line travelling, but when acquiring a certain degree with front truck dislocation, system can enter the pattern of overtaking other vehicles automatically, does the processing of overtaking other vehicles.In the pattern of overtaking other vehicles, central process unit can be removed the restriction of present speed stopping distance, overtake other vehicles in the front truck left side (or the right) that just can build up speed relatively, if does not also overtake other vehicles successfully (in 7 minutes) in specific time, steering indicating light is light yellow still, the restriction of present speed stopping distance recovers so, can only wait for next time and overtake other vehicles.Do like this is to prevent from that the driver from having beaten behind the steering indicating light infinitely quickening under with the situation in track with front truck.Certainly, even in the specific time, system allows to overtake other vehicles, but two cars some distance is super near, scraping might take place or when knocking into the back, system's meeting selected element is stopped or suddenly stopped hedging.When not having pedestrian and vehicle or other obstacles in the safety distance of passing track the place ahead (according to the relative distance of institute's passing vehicle, system can judge that this car can surmount the suitable speed of a motor vehicle of institute's passing vehicle, utilize the place ahead range finding passage that forms with the front truck dislocation simultaneously, whether detect the place ahead sends a car or obstacle, if have, just calculate relative velocity, and according to relative velocity, determine safety distance), system can point out navigating mate to quicken or this car of direct control quickens with proper speed, after this car gave it the gun the front safety distance of institute's passing vehicle, system assists navigating mate to return former track by voice and control vehicle travels with the safe distance between vehicles specified speed.If in the overtaking process, in case apomecometer detects the interior any roadblock of appearance of passing track the place ahead safety distance or sends a car, system can note by the voice suggestion navigating mate, and allow this car decelerate to the back of institute's passing vehicle, and point out this car back whether to send a car in safety distance, assist navigating mate to return former track and control vehicle travels with the safe distance between vehicles specified speed by voice.In overtaking process, if any quite unexpected situation is arranged, system can report to the police and from main brake.
Claims (4)
1. automobile driving assisting system, comprise main frame, actuating unit, sensing circuit is characterized in that described main frame comprises central process unit, input interface circuit, output interface circuit, sensing circuit comprises steering wheel angle sensing, short range apomecometer and long distancemeter, speed of a motor vehicle sensing circuit, vertically/the transverse acceleration sensing circuit; Actuating unit comprises brake control mechanism and oil circuit control mechanism; Wherein central process unit is connected with the input and output interface circuit by data bus; Steering wheel angle sensing, vertically/transverse acceleration sensing circuit, short range apomecometer be connected with input interface circuit respectively with long distancemeter, speed of a motor vehicle sensing circuit; Described brake control mechanism is connected with output interface circuit by driving circuit with the oil circuit control mechanism.
2. automobile driving assisting system according to claim 1, it is characterized in that described short range apomecometer comprises micro controller system, ultrasonic transducer, emission driving circuit, multiplexer circuit, signal conditioning circuit, described ultrasonic transducer is connected with multiplexer circuit through the emission driving circuit, one branch road of multiplexer circuit is connected with single machine output end, and another branch road is connected with input of single chip through signal conditioning circuit.
3. automobile driving assisting system according to claim 1 is characterized in that described long distancemeter adopts millimeter wave radar or range laser radar.
4. according to claim 1 or 2 or 3 described automobile driving assisting systems, it is characterized in that described central process unit also is connected with telltale with voice warning circuit by output interface circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202549877U CN201745529U (en) | 2010-07-05 | 2010-07-05 | Automobile driving assisting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202549877U CN201745529U (en) | 2010-07-05 | 2010-07-05 | Automobile driving assisting system |
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| CN201745529U true CN201745529U (en) | 2011-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202549877U Expired - Fee Related CN201745529U (en) | 2010-07-05 | 2010-07-05 | Automobile driving assisting system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890947A (en) * | 2010-07-05 | 2010-11-24 | 邹崇毓 | Automobile driving assisting system |
| CN103149566A (en) * | 2013-02-04 | 2013-06-12 | 上海大乘电气科技有限公司 | Electric distance measuring device |
| CN103213550A (en) * | 2013-05-07 | 2013-07-24 | 上海智汽电子科技有限公司 | Automobile brake safety prompt control system and safety prompt control method |
| TWI471240B (en) * | 2011-12-23 | 2015-02-01 | Automotive Res & Testing Ct | Vehicle driving condition monitoring system and method |
| CN108515934A (en) * | 2018-05-10 | 2018-09-11 | 芜湖航飞科技股份有限公司 | A kind of vehicle anti-collision early warning method and system based on more radars |
-
2010
- 2010-07-05 CN CN2010202549877U patent/CN201745529U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101890947A (en) * | 2010-07-05 | 2010-11-24 | 邹崇毓 | Automobile driving assisting system |
| TWI471240B (en) * | 2011-12-23 | 2015-02-01 | Automotive Res & Testing Ct | Vehicle driving condition monitoring system and method |
| CN103149566A (en) * | 2013-02-04 | 2013-06-12 | 上海大乘电气科技有限公司 | Electric distance measuring device |
| CN103213550A (en) * | 2013-05-07 | 2013-07-24 | 上海智汽电子科技有限公司 | Automobile brake safety prompt control system and safety prompt control method |
| CN103213550B (en) * | 2013-05-07 | 2016-01-06 | 上海智汽电子科技有限公司 | A kind of braking automobile safety instruction control system and safety instruction control method |
| CN108515934A (en) * | 2018-05-10 | 2018-09-11 | 芜湖航飞科技股份有限公司 | A kind of vehicle anti-collision early warning method and system based on more radars |
| CN108515934B (en) * | 2018-05-10 | 2021-09-03 | 芜湖航飞科技股份有限公司 | Automobile anti-collision early warning method and system based on multiple radars |
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Legal Events
| Date | Code | Title | Description |
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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: 20110216 Termination date: 20120705 |