CN2938140Y - An ultrasonic anti-scratch early warning system for automobiles - Google Patents
An ultrasonic anti-scratch early warning system for automobiles Download PDFInfo
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- CN2938140Y CN2938140Y CN 200620110759 CN200620110759U CN2938140Y CN 2938140 Y CN2938140 Y CN 2938140Y CN 200620110759 CN200620110759 CN 200620110759 CN 200620110759 U CN200620110759 U CN 200620110759U CN 2938140 Y CN2938140 Y CN 2938140Y
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Abstract
The utility model discloses an automobile ultrasonic forewarning system against scraping, comprising an automobile, a man-machine interface arranged on the bridge, a temperature sensor in the automobile, an ultrasonic sensor at the left front, an ultrasonic sensor at the left rear part, an ultrasonic sensor at the right front, an ultrasonic sensor at the right rear part and a detecting device connected with the man-machine interface in the inner part of the automobile. The utility model is controlled by only one macro-processing device, and the ultrasonic pulse is directly generated by a signal analyzing and processing device; a sensor with integrated receiver and transmitter adopted can be adaptable to work in different temperature environments; the utility model detects barriers on both sides of the automobile to prevent scraping accidents, and is provided with a man-machine interface which can give an alarm through sound light and show distance digitally in two working ways of automobile low-speed running, i.e. including back running and running in urban dense traffic and high-speed running; the automobile ultrasonic forewarning system against scraping of the utility model has the advantages of small size, low cost and wide range of application.
Description
Technical field the utility model relates to a kind of early warning system, the anti-friction extension early warning system of particularly a kind of running car ultrasound wave.
The background technology automobile takes place to wipe the extension accident in the process of moving easily, when low speed driving, often because the automobile both sides are too near from barrier.In running at high speed, when overtaking other vehicles, the distance of vehicle right and left both sides and barrier is too little, is easy to generate infrabar between two cars and causes traffic hazard to take place.Ultrasound wave has obtained important use in vehicle safety travel, its principle all is to utilize rectilinear propagation that ultrasound wave has and good reflection characteristic.But existing ultrasonic unit has significant limitation.The Chinese invention patent application number is 200410014332.1, the applying date is that 2004.3.16, denomination of invention " a kind of ultrasonic ranging security warning automobile " is characterized in that the front end of automobile is provided with ultrasound wave, the automotive front end obstacle distance is detected early warning, major function is to prevent automobile generation rear-end collision, but this device effect in automobile turning is very bad, because ultrasound wave is rectilinear propagation.Chinese patent application 01221308.X, the applying date is 2001.5.11, name is called " the automobile-used distance measuring equipment of ultrasound wave " and it is characterized in that making the driver accurately to go out in the 100 meters scopes in the place ahead (or rear) clear is arranged by this equipment, in order to record 100 meters distance, employing be large-power supersonic transducer.But the distance that ultrasound wave is surveyed is disturbed easily by the restriction of its range measurement principle.
The summary of the invention the purpose of this utility model is exactly at the deficiencies in the prior art, provides a kind of in the vehicle traveling process, and the non-safe distance barrier of the right and left is carried out the anti-friction extension early warning system of ultrasound wave.
For achieving the above object, the present invention adopts following technical scheme:
The anti-friction extension early warning system of a kind of running car ultrasound wave, comprise automobile, man-machine interface, temperature sensor front left side ultrasonic sensor, left rear side ultrasonic sensor, forward right side ultrasonic sensor, right lateral side ultrasonic sensor, pick-up unit, man-machine interface is installed on the bridge of automobile, pick-up unit is installed in the automobile, and temperature sensor is installed on the automobile; The front left side ultrasonic sensor is located at the front left side of automobile, and the left rear side ultrasonic sensor is located at the left rear side of automobile, and the forward right side ultrasonic sensor is located at the forward right side of automobile, and the right lateral side ultrasonic sensor is located at the right lateral side of automobile; Man-machine interface is connected with pick-up unit;
Wherein: pick-up unit is used for input and analysis, comprises signal analysis and treating apparatus, detection and binarization circuit, filtering and amplifying circuit, multiplexer circuit, emission driving circuit, pre-amplification circuit;
Front left side ultrasonic sensor input end is connected with emission driving circuit deferent segment, emission driving circuit input section is connected with the multiplexer circuit output terminal, front left side ultrasonic sensor output terminal is connected with the input end of pre-amplification circuit, and the output terminal of pre-amplification circuit is connected with the multiplexer circuit input end; Left rear side ultrasonic sensor input end is connected with emission driving circuit deferent segment, emission driving circuit input section is connected with the multiplexer circuit output terminal, left rear side ultrasonic sensor output terminal is connected with the input end of pre-amplification circuit, and the output terminal of pre-amplification circuit is connected with the multiplexer circuit input end; Forward right side ultrasonic sensor input end is connected with emission driving circuit deferent segment, emission driving circuit input section is connected with the multiplexer circuit output terminal, forward right side ultrasonic sensor output terminal is connected with the input end of pre-amplification circuit, and the output terminal of pre-amplification circuit is connected with the multiplexer circuit input end; Right lateral side ultrasonic sensor input end is connected with emission driving circuit deferent segment, emission driving circuit input section is connected with the multiplexer circuit output terminal, right lateral side ultrasonic sensor output terminal is connected with the input end of pre-amplification circuit, and the output terminal of pre-amplification circuit is connected with the multiplexer circuit input end;
Another output terminal of multiplexer circuit is connected with the input end of filtering and amplifying circuit, and the output terminal of filtering and amplifying circuit is connected with detection and binarization circuit input section, and the output terminal of detection and binarization circuit is connected with treating apparatus with signal analysis.
Described man-machine interface comprises duty selection circuit, sound alarm circuit, distance display and light warning, and duty selects circuit output end to be connected with the input end of pick-up unit; The input end of sound alarm circuit, optical alarm circuit and distance display circuit is connected with the output terminal of signal analysis and treating apparatus.
At first, the anti-friction extension early warning system of ultrasound wave is in holding state;
Button by people and interface is selected working method, and working method is divided into the automobile low speed driving and runs at high speed;
Signal analysis and treating apparatus are given the multiplexer circuit gating signal, wherein one tunnel of gating four tunnel, start-up temperature sensor.Wherein setting each road signal transmission work period is 10ms, and promptly the total system sense cycle is 40ms;
The emission driving circuit obtains driving ultrasonic sensor after the signal, sends ultrasound wave;
Ultrasonic sensor is received the ultrasound wave that returns, and by pre-amplification circuit signal is amplified to the level that is complementary with multi-way switch circuit, delivers to multiplexer circuit;
Multiplexer circuit obtains amplifying signal, delivers to bandpass filtering and amplifying circuit signal is carried out filtering and the ultrasonic signal in the effective band is selected amplification;
Signal in the effective frequency that amplifies is delivered to detection and binarization circuit, detection of echoes signal and the signal that becomes single polarity, binaryzation again, be A/D, threshold level is set, analogue echo is become level signal, produce according to threshold value and trigger look-at-me to signal analysis and treating apparatus;
Signal analysis and treating apparatus obtain look-at-me, stop rolling counters forward, read the count value in the current counter, calculate echo and transmit used time Δ T and obstacle distance S=Δ TV/2;
Signal analysis and treating apparatus are according to the working method of automobile, if low speed driving just all starts the display part of man-machine interface and sound and light alarm; Just only need to start the sound and light alarm part if run at high speed.Carry out sound and light alarm according to setting alarm threshold value.
The anti-friction extension early warning system of a kind of running car ultrasound wave of the present utility model is only totally controlled with a microprocessor, and ultrasonic pulse is directly produced by signal analysis and treating apparatus; Adopt the transceiver sensor; Temperature-compensation circuit is arranged, go for work under the different temperatures environment; To automobile both sides detection of obstacles, prevent to wipe the extension accident and take place, the required distance that records can overcome the hyperacoustic interference of outer bound pair fully within 1.5m; Be provided with man-machine interface, can sound and light alarm, digital range of a signal, working method is divided into the automobile low speed driving and promptly comprises in reversing and the urban compact traffic enforcement and run at high speed; The anti-friction extension early warning system of a kind of running car ultrasound wave of the present utility model, volume is little, and low cost of manufacture, usable range are wide.
Description of drawings Fig. 1 is the utility model structured flowchart
Fig. 2 is a circuit diagram of the present utility model
Fig. 3 is a fundamental diagram of the present utility model
Fig. 4 is the scheme of installation of the utility model on automobile
Embodiment
The anti-friction extension early warning system of a kind of running car ultrasound wave, comprise automobile 1, man-machine interface 2, temperature sensor 3 front left side ultrasonic sensors 4, left rear side ultrasonic sensor 5, forward right side ultrasonic sensor 6, right lateral side ultrasonic sensor 7, pick-up unit 8, man-machine interface 2 is installed on the bridge of automobile 1, pick-up unit 8 is installed in the automobile 1, and temperature sensor 3 is installed on the automobile 6; Front left side ultrasonic sensor 4 is located at the front left side of automobile 1, and left rear side ultrasonic sensor 5 is located at the left rear side of automobile 1, and forward right side ultrasonic sensor 6 is located at the forward right side of automobile 1, and right lateral side ultrasonic sensor 7 is located at the right lateral side of automobile 1; Man-machine interface 2 is connected with pick-up unit 8;
Wherein: pick-up unit 8 is used for input and analysis, comprises signal analysis and treating apparatus 81, detection and binarization circuit 82, filtering and amplifying circuit 83, multiplexer circuit 84, emission driving circuit 85,87,89,811, pre-amplification circuit 86,88,810,812;
Front left side ultrasonic sensor 4 input ends are connected with emission driving circuit 85 deferent segments, emission driving circuit 85 input ends are connected with multiplexer circuit 84 output terminals, front left side ultrasonic sensor 4 output terminals are connected with the input end of pre-amplification circuit 86, and the output terminal of pre-amplification circuit 86 is connected with multiplexer circuit 84 input ends; Left rear side ultrasonic sensor 5 input ends are connected with emission driving circuit 87 deferent segments, emission driving circuit 87 input sections are connected with multiplexer circuit 84 output terminals, left rear side ultrasonic sensor 5 output terminals are connected with the input end of pre-amplification circuit 88, and the output terminal of pre-amplification circuit 88 is connected with multiplexer circuit 84 input ends; Forward right side ultrasonic sensor 6 input ends are connected with emission driving circuit 89 deferent segments, emission driving circuit 89 input sections are connected with multiplexer circuit 84 output terminals, forward right side ultrasonic sensor 6 output terminals are connected with the input end of pre-amplification circuit 810, and the output terminal of pre-amplification circuit 810 is connected with multiplexer circuit 84 input ends; Right lateral side ultrasonic sensor 7 input ends are connected with emission driving circuit 811 deferent segments, emission driving circuit 811 input sections are connected with multiplexer circuit 84 output terminals, right lateral side ultrasonic sensor 7 output terminals are connected with the input end of pre-amplification circuit 812, and the output terminal of pre-amplification circuit 812 is connected with multiplexer circuit 84 input ends;
Another output terminal of multiplexer circuit 84 is connected with the input end of filtering and amplifying circuit 83, the output terminal of filtering and amplifying circuit 83 is connected with detection and binarization circuit 82 input sections, and the output terminal of detection and binarization circuit 82 is connected with treating apparatus 81 with signal analysis.
Man-machine interface 2 comprises duty selection circuit 21, sound alarm circuit 22, distance display 23 and light warning 24, and duty selects circuit 21 output terminals to be connected with the input end of pick-up unit 8; The input end of sound alarm circuit 22, optical alarm circuit 24 and distance display 23 circuit is connected with the output terminal of signal analysis with treating apparatus 81.
Principle of work man-machine interface circuit comprises button S1, light emitting diode D1, D2, resistance R 1, R2, R3, R4, R5, R6, R7, reverser 7406, hummer BELL1, eight bit shift register 74HC595, resistor group RP1, RP2, RP3, charactron DS1, DS2, DS3 forms.Wherein eight bit shift register 74HC595 have and serial data is converted into parallel data shows the range data surveyed at charactron.S1 presses when button, and light emitting diode D2 is luminous, and expression automobile low speed driving is as travelling in many barriers.S1 does not press when button, and light emitting diode D2 is not luminous, the expression galloping.When range finding from less than threshold value, be to report to the police, light emitting diode D2 and hummer BELL1 work simultaneously, realize sound and light alarm.
Signal analysis and treating apparatus 81 comprise single-chip microcomputer 8052, crystal oscillator Y1, capacitor C 7, C8, restorer MAX813, button S2. the process chip single-chip microcomputer here can adopt 8,16 single-chip microcomputer such as AT89C52, SST39C54 etc., restorer also adopts common restorer such as MAX708 etc., microprocessor is the core of apparatus of the present invention, overall control action, computed range, controlling alarm, generation ultrasonic pulse, control multi-way switch etc.
Temperature-compensation circuit comprises chip DS1620, capacitor C 1, C2.Its chips can adopt DS1820, MAX1457, LM95010 etc., and the function of this part is to detect extraneous temperature, signal is passed to microprocessor, because ultrasound wave has different speed under different temperatures.The unit of speed is m/s, compensates according to following formula, and wherein θ detects extraneous temperature.
Multi-way switch circuit comprises chip CD4052, capacitor C 9, resistance R 21, R22, R23.Its chips can adopt multi-way switch chips such as MAX350, AD7502.
Bandpass filtering and amplifying circuit comprise resistance R 37, R38, R39, R40, R41, R42, R43, R44, capacitor C 19, C20, C21, C22, C23, C24, C25 and two operational amplifier NE5532.
Detection and binarization circuit comprise resistance R 20, R35, R36, triode Q6, capacitor C 17, C18, diode D7, D8.Detection of echoes signal and become the signal of single polarity, binaryzation again, promptly A/D is provided with threshold level, and analogue echo is become level signal, produces according to threshold value and triggers look-at-me and give microprocessor.
The emission driving circuit comprises I.F.T. T2, triode Q1, Q4, resistance R 13, and R13, R17, interface J2 connect ultrasonic sensor.The emission driving circuit is to drive ultrasonic sensor.
Pre-amplification circuit comprises triode Q5, resistance R 15, R16, R18, R19, capacitor C 6, diode D4.Pre-amplification circuit is amplified to the level that is complementary with multi-way switch circuit to signal, delivers to multi-way switch circuit.
The power supply of device comprises interface J5, diode D5, D6, capacitor C 15, electrochemical capacitor C13, C14, C16, resistance R 33, R34, supply convertor LM78051.Wherein power supply changeover device can adopt MAX638 etc. relevant be input as positive 12V, output can be adjusted to the power supply changeover device of 5V.
Workflow diagram, see Figure 13:
Device starts, opening power;
The input vehicle condition, the driver is by man-machine interface button S1, and light emitting diode D2 is luminous, and expression automobile low speed driving is as travelling in many barriers.S1 does not press when button, and light emitting diode D2 is not luminous, the expression galloping;
Enabling counting device and temperature sensor, by microprocessor 8052 set-up and calculated devices, and start-up temperature sensor DS1620;
The switch operating way, microprocessor is selected the work way by multi-way switch circuit CD4052, and wherein setting each road signal transmission work period is 10ms, and promptly the total system sense cycle is 40ms; The pulse emission, this is to have microprocessor to pass through software directly to produce pulse;
Drive ultrasonic sensor, the emission driving circuit obtains pulse signal and drives ultrasonic sensor; The preposition amplification of echo, what adopt here is transmitting-receiving integrated sensor, when receiving echo, by pre-amplification circuit to signal being amplified to the level that is complementary with multi-way switch circuit;
Filtering and signal amplify, and by bandpass filtering and amplifying circuit signal is carried out filtering and the ultrasonic signal in the effective band is selected amplification;
Judge echo, by detection and binarization circuit, detection of echoes signal and become the signal of single polarity, binaryzation again, promptly A/D is provided with threshold level, and analogue echo is become level signal, produces according to threshold value and triggers look-at-me and give microprocessor;
Read current counter and temperature, microprocessor 8052 obtains look-at-me, stops rolling counters forward, reads count value and temperature in the current counter, and the unit of speed is m/s, compensates according to following formula, and wherein θ detects extraneous temperature.
Calculate echo and transmit used time Δ T and obstacle distance
The present invention is provided with lower-speed state: 1) not at running on expressway; 2) under having the situation of many barriers, both sides travel; Need press definitely by people's interface button S1, pilot lamp D2 lights.
Fast state is: be exactly at running on expressway.
Duty for automobile judges that the present invention is provided with man-machine interface, and the driver can set by button S1 according to actual conditions.
For alarm threshold value, be set at 0.3m～0.4m at lower-speed state; Be set at 1.0m～1.1m at fast state;
By in different weather, the test of different location, distance accuracy error≤2% of this device, rate of false alarm :≤1 ‰, rate of failing to report :≤1 ‰.So apparatus of the present invention can be reminded the driver exactly, avoid wiping the extension accident and take place.
Claims (2)
1, the anti-friction extension early warning system of a kind of running car ultrasound wave, comprise automobile (1), man-machine interface (2), temperature sensor (3), front left side ultrasonic sensor (4), left rear side ultrasonic sensor (5), forward right side ultrasonic sensor (6), right lateral side ultrasonic sensor (7), pick-up unit (8), it is characterized in that: man-machine interface (2) is installed on the bridge of automobile (1), pick-up unit (8) is installed in the automobile (1), and temperature sensor (3) is installed on the automobile (1); Front left side ultrasonic sensor (4) is located at the front left side of automobile (1), left rear side ultrasonic sensor (5) is located at the left rear side of automobile (1), forward right side ultrasonic sensor (6) is located at the forward right side of automobile (1), and right lateral side ultrasonic sensor (7) is located at the right lateral side of automobile (1); Man-machine interface (2) is connected with pick-up unit (8);
Wherein: pick-up unit (8) is used for input and analysis, comprises signal analysis and treating apparatus (81), detection and binarization circuit (82), filtering and amplifying circuit (83), multiplexer circuit (84), emission driving circuit (85), (87), (89), (811), pre-amplification circuit (86), (88), (810), (812);
Front left side ultrasonic sensor (4) input end is connected with emission driving circuit (85) deferent segment, emission driving circuit (85) input end is connected with multiplexer circuit (84) output terminal, front left side ultrasonic sensor (4) output terminal is connected with the input end of pre-amplification circuit (86), and the output terminal of pre-amplification circuit (86) is connected with multiplexer circuit (84) input end; Left rear side ultrasonic sensor (5) input end is connected with emission driving circuit (87) deferent segment, emission driving circuit (87) input section is connected with multiplexer circuit (84) output terminal, left rear side ultrasonic sensor (5) output terminal is connected with the input end of pre-amplification circuit (88), and the output terminal of pre-amplification circuit (88) is connected with multiplexer circuit (84) input end; Forward right side ultrasonic sensor (6) input end is connected with emission driving circuit (89) deferent segment, emission driving circuit (89) input section is connected with multiplexer circuit (84) output terminal, forward right side ultrasonic sensor (6) output terminal is connected with the input end of pre-amplification circuit (810), and the output terminal of pre-amplification circuit (810) is connected with multiplexer circuit (84) input end; Right lateral side ultrasonic sensor (7) input end is connected with emission driving circuit (811) deferent segment, emission driving circuit (811) input section is connected with multiplexer circuit (84) output terminal, right lateral side ultrasonic sensor (7) output terminal is connected with the input end of pre-amplification circuit (812), and the output terminal of pre-amplification circuit (812) is connected with multiplexer circuit (84) input end;
Another output terminal of multiplexer circuit (84) is connected with the input end of filtering and amplifying circuit (83), the output terminal of filtering and amplifying circuit (83) is connected with detection and binarization circuit (82) input section, and the output terminal of detection and binarization circuit (82) is connected with treating apparatus (81) with signal analysis.
2, the anti-friction extension early warning system of a kind of running car ultrasound wave according to claim 1, it is characterized in that: man-machine interface (2) comprises duty selection circuit (21), sound alarm circuit (22), distance display circuit (23) and optical alarm circuit (24), and duty selects circuit (21) output terminal to be connected with the input end of pick-up unit (8); The input end of sound alarm circuit (22), optical alarm circuit (24) and distance display circuit (23) is connected with the output terminal of signal analysis with treating apparatus (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 200620110759 CN2938140Y (en) | 2006-06-12 | 2006-06-12 | An ultrasonic anti-scratch early warning system for automobiles |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200620110759 CN2938140Y (en) | 2006-06-12 | 2006-06-12 | An ultrasonic anti-scratch early warning system for automobiles |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612930B (en) * | 2008-06-26 | 2011-08-17 | 比亚迪股份有限公司 | Automotive guard and alarm device and automotive guard and alarm method |
| CN101783077B (en) * | 2009-01-16 | 2012-04-25 | 武汉大学 | Vehicle superelevation monitoring and early warning device |
| KR20140059089A (en) * | 2012-11-07 | 2014-05-15 | 현대모비스 주식회사 | Method for processing ultrasonic wave sensor information of high speed drive adaptive type in vehicle |
| CN106292666A (en) * | 2016-08-29 | 2017-01-04 | 无锡卓信信息科技股份有限公司 | Pilotless automobile barrier-avoiding method based on ultrasonic distance detection and system |
| CN107505618A (en) * | 2017-08-31 | 2017-12-22 | 安徽信息工程学院 | Automobile preposition detects the device of section width |
| CN108036851A (en) * | 2017-12-22 | 2018-05-15 | 江苏理工学院 | A kind of measuring instrument of sound wave spread speed in different temperatures air dielectric |
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2006
- 2006-06-12 CN CN 200620110759 patent/CN2938140Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101612930B (en) * | 2008-06-26 | 2011-08-17 | 比亚迪股份有限公司 | Automotive guard and alarm device and automotive guard and alarm method |
| CN101783077B (en) * | 2009-01-16 | 2012-04-25 | 武汉大学 | Vehicle superelevation monitoring and early warning device |
| KR20140059089A (en) * | 2012-11-07 | 2014-05-15 | 현대모비스 주식회사 | Method for processing ultrasonic wave sensor information of high speed drive adaptive type in vehicle |
| CN103809168A (en) * | 2012-11-07 | 2014-05-21 | 现代摩比斯株式会社 | Method for processing ultrasonic wave sensor information of high speed drive in vehicle |
| CN103809168B (en) * | 2012-11-07 | 2017-11-17 | 现代摩比斯株式会社 | Self-adapting ultrasonic sensor information processing method during high vehicle speeds |
| KR101964600B1 (en) | 2012-11-07 | 2019-04-02 | 현대모비스 주식회사 | Method for Processing Ultrasonic Wave Sensor Information of High Speed Drive Adaptive Type in Vehicle |
| CN106292666A (en) * | 2016-08-29 | 2017-01-04 | 无锡卓信信息科技股份有限公司 | Pilotless automobile barrier-avoiding method based on ultrasonic distance detection and system |
| CN107505618A (en) * | 2017-08-31 | 2017-12-22 | 安徽信息工程学院 | Automobile preposition detects the device of section width |
| CN108036851A (en) * | 2017-12-22 | 2018-05-15 | 江苏理工学院 | A kind of measuring instrument of sound wave spread speed in different temperatures air dielectric |
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