CN208198262U

CN208198262U - Automobile omnibearing is anti-under the conditions of low visibility knocks into the back and collision system

Info

Publication number: CN208198262U
Application number: CN201820725682.6U
Authority: CN
Inventors: 宋立新; 魏雪芹
Original assignee: Harbin University of Science and Technology
Current assignee: Harbin University of Science and Technology
Priority date: 2018-05-16
Filing date: 2018-05-16
Publication date: 2018-12-07
Anticipated expiration: 2028-05-16

Abstract

The utility model relates to automotive safety apparatus fields, automobile omnibearing is anti-under the conditions of a kind of low visibility knocks into the back and collision system, including front range finder module, rear range finder module, left side range finder module, right side range finder module, preposition optics Penetrating Fog camera, postposition optics Penetrating Fog camera, central processing unit, liquid crystal display, phonetic alarm, the anti-laser lamp that knocks into the back.Two optics Penetrating Fog cameras of the system are separately mounted to headstock and tailstock portion, even if under the conditions of the low visibilities such as haze, smog, heavy rain, heavy snow, front and back road conditions can be also well understood in driver in time, collision obstacle and the pedestrian to pass by one's way when preventing from moving ahead or moving backward.Central processing unit is analyzed and processed the output data of four range finder modules, it can effectively prevent front to knock into the back and side collision, safeguard function is complete, and the anti-laser lamp that knocks into the back of automobile tail improves the safety and reliability of low visibility condition down train with good warning effect.

Description

Automobile omnibearing is anti-under the conditions of low visibility knocks into the back and collision system

Technical field

The utility model relates to automotive safety equipment technical field, be related to it is a kind of by early warning to anticollision, by prompting car owner to Warn under the conditions of a kind of low visibility of more measures of rear car automobile omnibearing is anti-to knock into the back and collision system.

Background technique

In recent years in the case where China's vehicles number rapid growth, traffic accident and the number of casualties become in constantly rising Gesture.China's climate variability occurs the low visibility weathers situation such as rain, snow, smog, haze on highway often, and common camera is only Unintelligible picture can be obtained, effective observation distance greatly shortens, and the environment of surrounding, pole cannot be well understood in driver in time Easily knock into the back and collide etc. traffic accidents, many bumper car accidents, rear-end collision be all do not see road because of dense fog and caused by. And automobile collision preventing technology is easily ignored in the lower condition lower side anticollision of visibility at present, and the warning of automobile tail is also deposited In obvious shortcoming, taillight warning effect is poor, is easy to make rear car ignorance to collide, anticollision that cannot be comprehensive.

Summary of the invention

In order to solve the deficiency of prior art rear-end collision preventing system under the conditions of low visibility, the utility model is provided It is a kind of that vehicle peripheral situation and good warning effect, automobile under the conditions of a kind of complete low visibility of safeguard function can be well understood in time It is comprehensive anti-to knock into the back and collision system.

Technical solution used by the utility model is achieved in that under the conditions of low visibility that automobile omnibearing is anti-and knocks into the back And collision system, including front range finder module, rear range finder module, left side range finder module, right side range finder module, preposition optical lens Mist camera, postposition optics Penetrating Fog camera, central processing unit, liquid crystal display, phonetic alarm, the anti-laser lamp that knocks into the back, should System features are: the front range finder module and rear range finder module are separately mounted at the headstock and the tailstock of automobile, described Left side range finder module and right side range finder module are separately mounted to the left and right sides of automobile middle part；The preposition optics Penetrating Fog camera Headstock and tailstock portion are separately mounted to postposition optics Penetrating Fog camera；The output of 4 range finder modules and 2 cameras and center Processor is connected, and central processing unit is control centre；The liquid crystal display is mounted on beside automobile instrument panel；The voice reporting Alert device is mounted at Driving Position；The anti-laser lamp that knocks into the back is mounted at the license plate lamp of automobile tail；Central processing unit Output end and liquid crystal display, phonetic alarm, the anti-laser lamp that knocks into the back be connected.

The utility model compared with prior art the advantages of be: front range finder module and rear range finder module are all made of newest The 77GHz CMOS millimetre-wave radar chip of research and development, the chip have very high integrated level, including transmitter, receiver, lock The modules such as phase ring and CW with frequency modulation synthesizer, millimetre-wave radar are very good for the penetrability of object, are adapting to various weather In the case of performance it is also very good, and cost is very low, has many advantages, such as that detection range is remote, penetration capacity is strong, range accuracy is high； The optics Penetrating Fog camera for being mounted on headstock and tailstock portion is not influenced by weather, the switching of night on daytime, and 24 hours round-the-clock to mention For high-definition image, make driver that road conditions after front road conditions and vehicle be well understood in time, collision when preventing from moving ahead or moving backward Barrier and the pedestrian to pass by one's way；It is mounted on the range finder module of different directions, area coverage is wider, and the moment keeps all around Safe distance between vehicles；The red light irradiation of the anti-laser lamp that knocks into the back will appear an optimum distance warning line on the ground, specially at night and low Reminded under visibility conditions below vehicle prevent from knocking into the back.The utility model efficiently solves the anti-collision early warning system of the prior art Safeguard function is complete, problem of anti-collision effect difference.

Detailed description of the invention

Fig. 1, which is that automobile omnibearing is anti-under the conditions of a kind of low visibility described in the utility model, to knock into the back and collision system structure Figure.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention clearer and more explicit, referring to the drawings to the present invention do into One step is described in detail.

Automobile omnibearing is anti-under the conditions of a kind of low visibility knocks into the back and collision system, front range finder module and rear ranging mould Block is separately mounted at the headstock and the tailstock of automobile, using 77GHz CMOS millimetre-wave radar chip, the chip include transmitter, The modules such as receiver, phaselocked loop and CW with frequency modulation synthesizer, Analog Baseband, power management, the knot of millimetre-wave radar receiver Structure includes low-noise amplifier, frequency mixer, programmable gain amplifier, filter, DC maladjustment eliminates circuit and A/D is converted Device etc..Continuous wave radar ranging is CW with frequency modulation (FMCW) distance measuring method, the basic principle is that radar antenna transmitting is continuous FM signal (generally continuous triangle shape wave), when encountering front obstacle, can generate and emit signal has certain time-delay Echo by radar antenna receives echo-signal, and will emit signal and receive signal and carry out Frequency mixing processing, the result after mixing Radar can be indicated at a distance from target with differing between its Beat Signal, corresponding pulse signal is calculated through microprocessor processes Distance values can be obtained, further according to difference frequency signal difference and relative speed relationship, calculate target to the relative velocity of radar.

After system starting, system constantly launches outward millimeter wave, and whether detection front has barrier.When there is barrier When, receiving antenna receives the echo of transmitting, inputs central processing unit, central processing by frequency mixer, amplifier and A/D converter Device carries out corresponding operation to it, it can be deduced that the data such as distance, angular speed and relative velocity of target, by speed and distance Analysis, judge whether safety, if dangerous, central processing unit if controls phonetic alarm and goes forward side by side for driver with information Row is reminded, the collision that may occur to avoid automobile and peripheral obstacle.

Left side range finder module and right side range finder module are separately mounted to the left and right sides of automobile middle part, super using HC-SR04 Sound ranging module, it is possible to provide the contactless distance sensing function of 2cm-400cm, range accuracy arrive 3mm up to high, and performance is steady It is fixed.Module includes ultrasonic transmitter, receiver and control circuit.Basic functional principle:

(1) ranging is triggered using I/O port TRIG, at least high level signal of 10us;

(2) module sends the square wave of 8 40kHz automatically, has detected whether signal return automatically；

(3) have signal return, a high level exported by I/O port ECHO, high level duration be exactly ultrasonic wave from It is emitted to the time of return.

Measuring distance=(the high level time * velocity of sound (340M/S))/2.

After activation system, each range finder module carries out data acquisition, and front range finder module is used to detect automobile and front truck Opposite speed and relative distance, are sent to central processing unit for output signal and handle, central processing unit carries out it accordingly After operation and analysis, opposite speed and relative distance information are calculated, and judge whether there is the risk to knock into the back, when relative distance is small When safe distance, central processing unit controls the output of phonetic alarm, and phonetic alarm then exports " with front obstacle distance XX please be kept within XX speed ", it reminds driver to carry out corresponding measure, to avoid and knock into the back.

Similarly, rear range finder module is used to detect the opposite speed and relative distance of automobile and rear car, when relative distance is small When safe distance, phonetic alarm output " with front vehicle distance XX, relative velocity XX, it is noted that drive " is prevented at this time Knocking into the back laser lamp can be bright, and the red light irradiation of laser lamp will appear an optimum distance warning line on the ground, reminds vehicle note below Meaning traveling, prevents from knocking into the back.

Left side range finder module and right side range finder module are used to detect automobile at a distance from left and right sides barrier or vehicle, When relative distance is less than safe distance, phonetic alarm exports " with XX obstacle distance XX, please keep other than XX " in order to avoid sending out Raw collision and scraping.

Preposition optics Penetrating Fog camera and postposition optics Penetrating Fog camera are separately mounted at headstock and the tailstock, for detecting Vehicle external environment, for optics Penetrating Fog camera using fog penetration lens, fog penetration lens refer to long wavelength's light in infrared optical arena The transmitance of (700nm-950nm) is very high, and is provided simultaneously with and can control this high wavelength light imaging surface (CCD imaging) function Camera lens, even if in fog, dust, smog, in the visible lights such as light rain (color image) environment, can also take it is very clear, The black-and-white image of high contrast.Liquid crystal display is mounted on beside automobile instrument panel, after the environment and vehicle for showing Chinese herbaceous peony Situation, improve the visuality of driver.Phonetic alarm is mounted at Driving Position, is provided for driver relatively fast Degree and relative distance information remind driver to carry out corresponding measure.The anti-laser lamp that knocks into the back is mounted at the license plate lamp of automobile tail, The red light irradiation of laser lamp prompts optimum distance warning line on the ground, and specially in night or the prompting of misty rain day, vehicle is prevented below It knocks into the back.

Automobile omnibearing is anti-under the conditions of the low visibility knocks into the back and collision system, to car door parallel direction and vertical direction Detection, increases area coverage, and safeguard function is complete, while can make driver that vehicle external environment be well understood, for avoiding front Vehicle and barrier, even the system also can significantly improve visibility and remind vehicle below under the haze weather of severe Pay attention to traveling, improve the safety and reliability of driving.

Finally, it should be noted that the utility model is exemplarily described above in conjunction with attached drawing, it is clear that this is practical new Type specific implementation is not subject to the restrictions described above, as long as using the various unsubstantialities that technical solutions of the utility model carry out Improvement, or it is not improved this tested into novel conception and technical scheme directly apply to other occasions, it is practical at this Within novel protection scope.

Claims

It knocks into the back and collision system 1. automobile omnibearing is anti-under the conditions of a kind of low visibility, it is characterised in that: including front ranging mould Block, rear range finder module, left side range finder module, right side range finder module, preposition optics Penetrating Fog camera, the camera shooting of postposition optics Penetrating Fog Head, central processing unit, liquid crystal display, phonetic alarm, the anti-laser lamp that knocks into the back, the central processing unit are control centre, institute The output for stating four range finder modules and two optics Penetrating Fog cameras is connected to central processing unit, the output of central processing unit and liquid Crystal display, phonetic alarm are connected with the anti-laser lamp that knocks into the back.
It knocks into the back and collision system 2. automobile omnibearing is anti-under the conditions of a kind of low visibility according to claim 1, feature Be: front range finder module and rear range finder module are separately mounted at the headstock and the tailstock of automobile, using 77GHz CMOS milli Metre wave radar chip.
It knocks into the back and collision system 3. automobile omnibearing is anti-under the conditions of a kind of low visibility according to claim 1, feature Be: left side range finder module and right side range finder module are separately mounted to the left and right sides of automobile middle part, using HC-SR04 ultrasonic wave Range finder module.
It knocks into the back and collision system 4. automobile omnibearing is anti-under the conditions of a kind of low visibility according to claim 1, feature Be: preposition optics Penetrating Fog camera and postposition optics Penetrating Fog camera are separately mounted to headstock and the tailstock portion of automobile.
It knocks into the back and collision system 5. automobile omnibearing is anti-under the conditions of a kind of low visibility according to claim 1, feature Be: central processing unit uses TMS320DM642 chip.
It knocks into the back and collision system 6. automobile omnibearing is anti-under the conditions of a kind of low visibility according to claim 1, feature Be: the anti-laser lamp that knocks into the back is mounted at the license plate lamp of automobile tail, for reminding rear car to maintain a certain distance.