CN105022078A - Latitude and longitude vehicle spacing measuring system based on filter circuit - Google Patents
Latitude and longitude vehicle spacing measuring system based on filter circuit Download PDFInfo
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- CN105022078A CN105022078A CN201510398210.5A CN201510398210A CN105022078A CN 105022078 A CN105022078 A CN 105022078A CN 201510398210 A CN201510398210 A CN 201510398210A CN 105022078 A CN105022078 A CN 105022078A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
- G01S19/51—Relative positioning
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The invention discloses a latitude and longitude vehicle spacing measuring system based on a filter circuit. The system comprises a positioning module, a radio frequency transmit-receive module, an analog to digital conversion circuit, a filter circuit, a display module, a microcontroller module and a power supply module. The positioning module and the radio frequency transmit-receive module are connected with the microcontroller module through the analog to digital conversion circuit and the filter circuit connected in order. The display module and the power supply module are connected with corresponding ports of the microcontroller module. A longitude and latitude of a vehicle are obtained in real time through the positioning module, longitudes and latitudes of vehicles around the vehicle are received through the radio frequency transmit-receive module, furthermore distances of the vehicle and the vehicle around are obtained precisely through calculation, and therefore a driver can be reminded to pay attention to vehicle spacing well.
Description
Technical field
The present invention relates to a kind of distance survey system, particularly relate to a kind of longitude and latitude automobile distance measuring system based on filtering circuit, belong to range finding field.
Background technology
Along with expanding economy, transportation is become increasingly prosperous, but is difficult to catch up with due to the hardware such as road condition, traffic administration, add drive overtake other vehicles, principle that to go out that car is deserted, mistake estimates spacing etc. subjective, the traffic hazard of collision is mutually occurred again and again.The essential measure addressed this problem is to install and can find range from motion tracking to the automobile in advancing, self-stopping device in risk distance.
Due to the development of electronic technology, laser ranging, microwave radar range, ultrasonic ranging and infrared distance measuring are successively there is.Wherein laser ranging is detecting laser beam two spacing reflected by the catoptron of laser beam irradiation on front truck (automobile tail).Due to the vibration by atrocious weather, automobile fierceness, the factors such as mirror surface is worn and torn, pollution impact, make the laser beam of reflection detection range on certain power reduce 1/2 ~ 1/3 than the ultimate range that may detect, loss is very large, the degree of accuracy of impact detection; Microwave radar range technology be military and the circuit part such as the equipment that adopts of some commercial development and oscillator expensive, almost also do not open up now commercial market; Research was done in ultrasonic ranging at home and abroad existing people, owing to adopting special professional component to make its price high, was difficult to promote; Infrared ray, as a kind of special light wave, has the basic physical transfer characteristic-reflection, refraction, scattering etc. of light wave, and due to its technical difficulty relatively not too large, the range measurement system of formation is with low cost, function admirable, is convenient to civilian popularization.
RFID technique appears in World War II the earliest, is successfully applied to the identification of friend or foe of aircraft at that time.Develop into one of 21 century most important technology now.Its ultimate principle utilizes the Space Coupling (inductance or electromagnetic coupled) of radiofrequency signal or the transport property of reflection, realizes the automatic identification to being identified object.
Satellite Navigation Technique is applied to the Global Positioning System (GPS) of 20 century 70s by land, sea, and air of U.S. joint research and development the earliest, now global civilian.Because the position of satellite is accurately known, in GPS observation, we can obtain the distance of satellite to receiver, range formula in applying three-dimensional coordinate, utilizes 3 satellites, just can form 3 equations, solve the position of observation station, realize the determination to object's position.
Such as application number is a kind of two-way infrared stadimeter of " 201410118986.2 ", relate to infrared distance measurement device, the present invention measures the problem of testing distance in order to solve the existing infrared range-measurement system optional position be difficult in large space, this invention comprises LCDs, first infrared receiving module, first infrared transmission module, second infrared receiving module, second infrared transmission module, processor, A/D modular converter, power module and shell body, the upper surface of shell body has penetrating window, LCDs is arranged in described window, a sidewall of shell body has a hole and No. two holes, a corresponding hole has No. three coaxial holes, corresponding No. two holes have No. four coaxial holes, first infrared signal output terminal is placed in a hole, first received IR signal input end is placed in No. two holes, second infrared signal output terminal is placed in No. three holes, second received IR signal input end is placed in No. four holes.
And for example application number is a kind of infrared distance measuring device of " 201410206194.0 ", it comprises an infrared ambulator and a base, described base is provided with a depressed part, described infrared ambulator is embedded at described depressed part, described infrared ambulator and described base are bolted, the side of described base is connected with one end of side plate by a secure component, the affixed magnet of the other end of described side plate, described magnet is provided with a switch, during described switch opens, described magnet has magnetic, and when described switch closes, described magnet does not have magnetic.This invention infrared distance measuring device is used for measuring the depth of parallelism and the right alignment of pylon or tower cylinder two end flanges, have precision high, measure advantage easily, also improve production efficiency.
Summary of the invention
Technical matters to be solved by this invention provides a kind of longitude and latitude automobile distance measuring system based on filtering circuit for the deficiency of background technology.
The present invention is for solving the problems of the technologies described above by the following technical solutions:
A kind of longitude and latitude automobile distance measuring system based on filtering circuit, comprise locating module, radio-frequency (RF) receiving and transmission module, analog to digital conversion circuit, filtering circuit, display module, micro controller module, power module, described locating module connects micro controller module with radio-frequency (RF) receiving and transmission module respectively by the analog to digital conversion circuit be connected successively, filtering circuit, and described display module and power module are connected on the corresponding port of micro controller module;
Described filtering circuit comprises the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, operational amplifier, power supply, described one end of first resistance is connected with the output terminal of analog to digital conversion circuit, be connected with one end of the second resistance after the other end of described first resistance connects one end of the first electric capacity and one end of the second electric capacity, be connected with the negative input end of operational amplifier behind one end of other end connection the 3rd resistance of described first electric capacity, the other end of described second electric capacity is also connected with the output terminal of operational amplifier after connecing the other end of the 3rd resistance, the other end ground connection of described second resistance, the positive input terminal of described operational amplifier is connected in series ground connection after the 4th resistance and the 5th resistance successively, the positive power source terminal of operational amplifier is also connected with one end of the 6th resistance after connecing one end of the 3rd electric capacity, the other end of described 6th resistance is connected with the positive pole of power supply, the other end ground connection of described 3rd electric capacity, the negative power end of operational amplifier is also connected with one end of the 4th electric capacity after connecing one end of the 7th resistance, the other end of described 7th resistance is connected with the negative pole of power supply, the other end ground connection of described 4th electric capacity, be connected with the input end of micro controller module after output terminal serial connection the 5th electric capacity of described operational amplifier.
Wherein, locating module, for the latitude and longitude information parameter of this car of Real-time Obtaining;
Radio-frequency (RF) receiving and transmission module, for outwards launching the latitude and longitude information parameter of this car in real time, receives the latitude and longitude information parameter that surrounding vehicles is launched simultaneously;
Micro controller module, carries out dynamic process for the latitude and longitude information parameter of launching latitude and longitude information parameter and the surrounding vehicles of this car, and then calculates the distance between two cars;
Display module, for showing the distance parameter of this car and surrounding vehicles in real time.
As the further preferred version of a kind of longitude and latitude automobile distance measuring system based on filtering circuit of the present invention, described micro controller module adopts AT89C52 series monolithic.
As the further preferred version of a kind of longitude and latitude automobile distance measuring system based on filtering circuit of the present invention, the chip model of described radio-frequency (RF) receiving and transmission module is nRF2401.
As the further preferred version of a kind of longitude and latitude automobile distance measuring system based on filtering circuit of the present invention, the chip model of described locating module is Otrack-32.
As the further preferred version of a kind of longitude and latitude automobile distance measuring system based on filtering circuit of the present invention, described display module adopts 12864 dot matrix type LCD display.
The present invention adopts above technical scheme compared with prior art, has following technique effect:
1, measuring accuracy of the present invention is high, and is easy to realize;
2, the present invention is by the longitude and latitude of locating module Real-time Obtaining vehicle, the longitude and latitude of surrounding vehicles is received in combination with radio-frequency (RF) receiving and transmission module, and then by calculating the distance accurately drawing Ben Che and surrounding vehicles, and then driver is better reminded to note maintaining safe distance.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention;
Fig. 2 is filtering circuit circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:
As shown in Figure 1, a kind of longitude and latitude automobile distance measuring system based on filtering circuit, comprise locating module, radio-frequency (RF) receiving and transmission module, analog to digital conversion circuit, filtering circuit, display module, micro controller module, power module, described locating module and radio-frequency (RF) receiving and transmission module divide the analog to digital conversion circuit by being connected successively, filtering circuit connects micro controller module, and described display module and power module are connected on the corresponding port of micro controller module;
As shown in Figure 2, described filtering circuit comprises the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, operational amplifier, power supply, described one end of first resistance is connected with the output terminal of analog to digital conversion circuit, be connected with one end of the second resistance after the other end of described first resistance connects one end of the first electric capacity and one end of the second electric capacity, be connected with the negative input end of operational amplifier behind one end of other end connection the 3rd resistance of described first electric capacity, the other end of described second electric capacity is also connected with the output terminal of operational amplifier after connecing the other end of the 3rd resistance, the other end ground connection of described second resistance, the positive input terminal of described operational amplifier is connected in series ground connection after the 4th resistance and the 5th resistance successively, the positive power source terminal of operational amplifier is also connected with one end of the 6th resistance after connecing one end of the 3rd electric capacity, the other end of described 6th resistance is connected with the positive pole of power supply, the other end ground connection of described 3rd electric capacity, the negative power end of operational amplifier is also connected with one end of the 4th electric capacity after connecing one end of the 7th resistance, the other end of described 7th resistance is connected with the negative pole of power supply, the other end ground connection of described 4th electric capacity, be connected with the input end of micro controller module after output terminal serial connection the 5th electric capacity of described operational amplifier.
Wherein, locating module, for the latitude and longitude information parameter of this car of Real-time Obtaining;
Radio-frequency (RF) receiving and transmission module, for outwards launching the latitude and longitude information parameter of this car in real time, receives the latitude and longitude information parameter that surrounding vehicles is launched simultaneously;
Micro controller module, carries out dynamic process for the latitude and longitude information parameter of launching latitude and longitude information parameter and the surrounding vehicles of this car, and then calculates the distance between two cars;
Specifically be calculated as:
wherein E
1for the longitude information parameter of this car, E
2for the longitude information parameter of surrounding vehicles, W
1for the latitude information parameter of this car, W
2for the latitude information parameter of surrounding vehicles, S is the distance of Ben Che and surrounding vehicles, and a is the length of longitude and latitude 1 ° representative;
Display module, for showing the distance parameter of this car and surrounding vehicles in real time.
Wherein, described micro controller module adopts AT89C52 series monolithic, and the chip model of described radio-frequency (RF) receiving and transmission module is nRF2401, and the chip model of described locating module is Otrack-32, and described display module adopts 12864 dot matrix type LCD display.
The present invention, by the longitude and latitude of locating module Real-time Obtaining vehicle, receives the longitude and latitude of surrounding vehicles in combination with radio-frequency (RF) receiving and transmission module, and then by calculating the distance accurately drawing Ben Che and surrounding vehicles, and then better remind driver to note maintaining safe distance.
Radio-frequency (RF) receiving and transmission module: nRF2401 chip is a kind of monolithic radio transceiver chip working in 2.4GHz, can realize a circuit-switched data simultaneously and launch and two paths of data receiving function.Radio frequency, 8051MCU, 9 Channel 12-Bit ADC, peripheral cell, inductance and wave filter are all integrated in single-chip by it, and power consumption is very low, and output power and communication channel are configured by program, and range of application widely.What the design adopted is core with nRF2401 chip, and nRF2401 module has two group interfaces, adopts interface 1 to send data respectively; Interface 2 receives data, thus realizes the transmitted in both directions of information.
Locating module: locating module needed for native system adopts Beijing Orient couple stars to produce satellite navigation chip Otrack-32, can receive No. two, the Big Dipper, GPS, GLONASS satellite-signal simultaneously, realize multisystem combined navigator fix, test the speed, regularly.Otrack-32 chip achieves 1s warm start the most fast in the world today, international the shortest 35s cold start-up, stable 1s reacquisition; True value location up to 20 times per second; Positioning precision 5m; Differential positioning precision 0.5m; Highly reliable, anti-interference; Adapt to rugged surroundings; Have passed strict ground test and variety carrier dynamic test.Otrack-32 chip is that the professional navigation field such as navigation, measurement, time service provide the high-performance core device domesticized completely.
12864 LCD MODULE: native system adopts 12864 dot matrix type LCD display module, can show the relevant informations such as surrounding vehicles, minimum spacing, this car longitude and latitude.Dot matrix type LCD display module can not only show conventional characters, also can display graphics and Chinese character.12864LCD display module is display 128 points laterally, and longitudinally display 64 points, can show at most 16 × 16 Chinese character 4 row 8 simultaneously and arrange, can meet a large amount of information display requirements.
During system works, first obtained the accurate latitude and longitude information of this car by satellite navigation chip, then information is encoded.Coded message mainly comprises this car identification sequence number, latitude and longitude information.After completing information coding, coded message is carried out information transmission by the passage 1 of radio-frequency (RF) receiving and transmission module, receiver address should be set to unified public address, adopts passage 2 to receive the information of surrounding vehicles transmission simultaneously, sends to single-chip microcomputer to process the information received.
During system works, first System self-test and Initialize installation is carried out, then receive latitude and longitude information by satellite navigation module and be input to single-chip microcomputer, single-chip microcomputer is by controlling radio-frequency (RF) receiving and transmission module, the passage 1 of nRF2401 module is adopted to send latitude and longitude information, adopt passage 2 to receive latitude and longitude information around simultaneously, and the latitude and longitude information of the surrounding vehicles received is input to single-chip microcomputer and carries out processing and then accurately drawing automobile distance.
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.By reference to the accompanying drawings embodiments of the present invention are explained in detail above, but the present invention is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art possess, makes a variety of changes under can also or else departing from the prerequisite of present inventive concept.
Claims (5)
1. the longitude and latitude automobile distance measuring system based on filtering circuit, it is characterized in that: comprise locating module, radio-frequency (RF) receiving and transmission module, analog to digital conversion circuit, filtering circuit, display module, micro controller module, power module, described locating module connects micro controller module with radio-frequency (RF) receiving and transmission module respectively by the analog to digital conversion circuit be connected successively, filtering circuit, and described display module and power module are connected on the corresponding port of micro controller module;
Described filtering circuit circuit comprises the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, first electric capacity, second electric capacity, 3rd electric capacity, 4th electric capacity, 5th electric capacity, operational amplifier, power supply, described one end of first resistance is connected with the output terminal of analog to digital conversion circuit, be connected with one end of the second resistance after the other end of described first resistance connects one end of the first electric capacity and one end of the second electric capacity, be connected with the negative input end of operational amplifier behind one end of other end connection the 3rd resistance of described first electric capacity, the other end of described second electric capacity is also connected with the output terminal of operational amplifier after connecing the other end of the 3rd resistance, the other end ground connection of described second resistance, the positive input terminal of described operational amplifier is connected in series ground connection after the 4th resistance and the 5th resistance successively, the positive power source terminal of operational amplifier is also connected with one end of the 6th resistance after connecing one end of the 3rd electric capacity, the other end of described 6th resistance is connected with the positive pole of power supply, the other end ground connection of described 3rd electric capacity, the negative power end of operational amplifier is also connected with one end of the 4th electric capacity after connecing one end of the 7th resistance, the other end of described 7th resistance is connected with the negative pole of power supply, the other end ground connection of described 4th electric capacity, be connected with the input end of micro controller module after output terminal serial connection the 5th electric capacity of described operational amplifier,
Wherein, locating module, for the latitude and longitude information parameter of this car of Real-time Obtaining;
Radio-frequency (RF) receiving and transmission module, for outwards launching the latitude and longitude information parameter of this car in real time, receives the latitude and longitude information parameter that surrounding vehicles is launched simultaneously;
Micro controller module, carries out dynamic process for the latitude and longitude information parameter of launching latitude and longitude information parameter and the surrounding vehicles of this car, and then calculates the distance between two cars;
Display module, for showing the distance parameter of this car and surrounding vehicles in real time.
2. a kind of longitude and latitude automobile distance measuring system based on filtering circuit according to claim 1, is characterized in that: described micro controller module adopts AT89C52 series monolithic.
3. a kind of longitude and latitude automobile distance measuring system based on filtering circuit according to claim 1, is characterized in that: the chip model of described radio-frequency (RF) receiving and transmission module is nRF2401.
4. a kind of longitude and latitude automobile distance measuring system based on filtering circuit according to claim 1, is characterized in that: the chip model of described locating module is Otrack-32.
5. a kind of longitude and latitude automobile distance measuring system based on filtering circuit according to claim 1, is characterized in that: described display module adopts 12864 dot matrix type LCD display.
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| CN201510398210.5A CN105022078A (en) | 2015-07-08 | 2015-07-08 | Latitude and longitude vehicle spacing measuring system based on filter circuit |
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| CN201510398210.5A CN105022078A (en) | 2015-07-08 | 2015-07-08 | Latitude and longitude vehicle spacing measuring system based on filter circuit |
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| CN102035500A (en) * | 2009-10-01 | 2011-04-27 | 邓加慧 | High anti-interference high-pass amplifier |
| CN202193050U (en) * | 2011-08-17 | 2012-04-18 | 胡鹏 | Novel anti-collision system |
| CN202256684U (en) * | 2011-10-12 | 2012-05-30 | 三合顺（天津）电子科技有限公司 | Portable accurate positioning device for child relative position |
| CN102983837A (en) * | 2012-11-21 | 2013-03-20 | 昆山北极光电子科技有限公司 | Bootstrap high-pass filtering circuit |
| CN204302486U (en) * | 2014-12-31 | 2015-04-29 | 北京工业大学 | A kind of indoor locating system |
-
2015
- 2015-07-08 CN CN201510398210.5A patent/CN105022078A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035500A (en) * | 2009-10-01 | 2011-04-27 | 邓加慧 | High anti-interference high-pass amplifier |
| CN202193050U (en) * | 2011-08-17 | 2012-04-18 | 胡鹏 | Novel anti-collision system |
| CN202256684U (en) * | 2011-10-12 | 2012-05-30 | 三合顺（天津）电子科技有限公司 | Portable accurate positioning device for child relative position |
| CN102983837A (en) * | 2012-11-21 | 2013-03-20 | 昆山北极光电子科技有限公司 | Bootstrap high-pass filtering circuit |
| CN204302486U (en) * | 2014-12-31 | 2015-04-29 | 北京工业大学 | A kind of indoor locating system |
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