CN104678401A - Intelligent distance measuring method - Google Patents
Intelligent distance measuring method Download PDFInfo
- Publication number
- CN104678401A CN104678401A CN201310632857.0A CN201310632857A CN104678401A CN 104678401 A CN104678401 A CN 104678401A CN 201310632857 A CN201310632857 A CN 201310632857A CN 104678401 A CN104678401 A CN 104678401A
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- China
- Prior art keywords
- distance measuring
- measuring signal
- signal
- converted
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 7
- 230000003321 amplification Effects 0.000 claims abstract description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000019800 disodium phosphate Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
- Traffic Control Systems (AREA)
Abstract
The invention provides an intelligent distance measuring method, which comprises the following steps that ultrasonic distance measuring modules are arranged in the middle position and at two ends of the back side of an automobile, and a distance measuring signal is output; the distance measuring signal is subjected to power amplification through an operation amplifier; the distance measuring signal is converted into a digital signal from an analog signal through an A/D (analog to digital) converter; the distance measuring signal in the digital form is received through the input end of a controller, and in addition, the distance measuring signal is converted into numbers to be displayed on a liquid crystal screen; the distance measuring signal and a warning value stored inside the controller are compared, and when the distance measuring signal is smaller than the warning value, warning sound is given out.
Description
Technical field
The present invention relates to electricity field, particularly a kind of intelligent distance-measuring method.
Background technology
Huge numbers of families come into by automobile, and become the main traffic instrument of people's trip, reversing is the requisite operation item of driver, and how improving the security of reversing, accuracy and convenience is current problem demanding prompt solution.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of intelligent distance-measuring method.
Technical scheme of the present invention is achieved in that
A kind of intelligent distance-measuring method, comprises the following steps: arrange ultrasonic distance measuring module at automotive back two ends and centre position, exports distance measuring signal; By operational amplifier, power amplification is carried out to described distance measuring signal; By A/D converter, described distance measuring signal is converted to digital signal by simulating signal; Received the distance measuring signal of described digital form by the input end of controller, and distance measuring signal is converted to numeral in liquid crystal screen display; By distance measuring signal compared with the warning value of controller storage inside, when range finding is less than warning value, send alarm sound.
The invention has the beneficial effects as follows: found range by the barrier of ultrasonic distance measuring module to vehicle rear-side, and concrete data are shown on liquid crystal display, measure accurately, good prompting and directive function can be played to driver.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the process flow diagram of a kind of intelligent distance-measuring method of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Huge numbers of families come into by automobile, and become the main traffic instrument of people's trip, reversing is the requisite operation item of driver.
The present invention is found range by the barrier of ultrasonic distance measuring module to vehicle rear-side, and concrete data is shown on liquid crystal display, measures accurately, can play good prompting and directive function to driver.
As shown in Figure 1, a kind of intelligent distance-measuring method of the present invention, comprises the following steps: arrange ultrasonic distance measuring module at automotive back two ends and centre position, exports distance measuring signal; By operational amplifier, power amplification is carried out to described distance measuring signal; By A/D converter, described distance measuring signal is converted to digital signal by simulating signal; Received the distance measuring signal of described digital form by the input end of controller, and distance measuring signal is converted to numeral in liquid crystal screen display; By distance measuring signal compared with the warning value of controller storage inside, when range finding is less than warning value, send alarm sound.
Preferably, described controller is dsp processor.
Above-mentioned dsp processor can be TMS320F2812DSP, and be 32 fixed DSPs, it has the AD data acquisition of EVA, EVB task manager and supporting 12 16 passages, has abundant Peripheral Interface, as CAN, SCI etc.
The ADC module of TMS320F2812 is 12 bit resolutions, has the analog to digital converter of pipeline organization, the built-in dual-sampling hold circuit of TMS320F2812, and when keeping data acquisition, window has and independently calibrates control in advance.And allow system to same Channel-shifted repeatedly, allow user to perform over-sampling algorithm, this more traditional single transformation result adds more solution, is conducive to the precision improving sampling.
There is multiple trigger source can start ADC conversion.Switching time fast, ADC clock can be configured to 25MHz, and the highest sampling bandwidth is 12.5MSPS.
When building data acquisition system (DAS) with TMS320F2812, need not external ADC, avoid complicated hardware design.
The present invention is found range by the barrier of ultrasonic distance measuring module to vehicle rear-side, and concrete data is shown on liquid crystal display, measures accurately, can play good prompting and directive function to driver.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. an intelligent distance-measuring method, is characterized in that, comprises the following steps:
Ultrasonic distance measuring module is set at automotive back two ends and centre position, exports distance measuring signal;
By operational amplifier, power amplification is carried out to described distance measuring signal;
By A/D converter, described distance measuring signal is converted to digital signal by simulating signal;
Received the distance measuring signal of described digital form by the input end of controller, and distance measuring signal is converted to numeral in liquid crystal screen display;
By distance measuring signal compared with the warning value of controller storage inside, when range finding is less than warning value, send alarm sound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632857.0A CN104678401A (en) | 2013-11-29 | 2013-11-29 | Intelligent distance measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310632857.0A CN104678401A (en) | 2013-11-29 | 2013-11-29 | Intelligent distance measuring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104678401A true CN104678401A (en) | 2015-06-03 |
Family
ID=53313726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310632857.0A Pending CN104678401A (en) | 2013-11-29 | 2013-11-29 | Intelligent distance measuring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104678401A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994001787A1 (en) * | 1992-07-02 | 1994-01-20 | Trend Tec Inc. | Vehicular distance measuring system with integral mirror display |
| CN200962146Y (en) * | 2006-09-08 | 2007-10-17 | 湖南九天科技有限公司 | Car back radar and temperature combined digital display instrument |
| CN200979597Y (en) * | 2006-09-07 | 2007-11-21 | 比亚迪股份有限公司 | An automobile backing radar |
| EP1879048A1 (en) * | 2006-07-13 | 2008-01-16 | Robert Bosch Gmbh | Method for distance measuring and ultrasound distance measuring sensor |
| CN202453503U (en) * | 2011-12-08 | 2012-09-26 | 长安大学 | Singlechip-based reversing radar |
-
2013
- 2013-11-29 CN CN201310632857.0A patent/CN104678401A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994001787A1 (en) * | 1992-07-02 | 1994-01-20 | Trend Tec Inc. | Vehicular distance measuring system with integral mirror display |
| EP1879048A1 (en) * | 2006-07-13 | 2008-01-16 | Robert Bosch Gmbh | Method for distance measuring and ultrasound distance measuring sensor |
| CN200979597Y (en) * | 2006-09-07 | 2007-11-21 | 比亚迪股份有限公司 | An automobile backing radar |
| CN200962146Y (en) * | 2006-09-08 | 2007-10-17 | 湖南九天科技有限公司 | Car back radar and temperature combined digital display instrument |
| CN202453503U (en) * | 2011-12-08 | 2012-09-26 | 长安大学 | Singlechip-based reversing radar |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |
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| WD01 | Invention patent application deemed withdrawn after publication |