CN105842682A - Vehicle safety interval detection system - Google Patents
Vehicle safety interval detection system Download PDFInfo
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- CN105842682A CN105842682A CN201610307135.1A CN201610307135A CN105842682A CN 105842682 A CN105842682 A CN 105842682A CN 201610307135 A CN201610307135 A CN 201610307135A CN 105842682 A CN105842682 A CN 105842682A
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- head
- definition camera
- lens
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- emitting head
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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
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/12—Systems for determining distance or velocity not using reflection or reradiation using electromagnetic waves other than radio waves
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention relates to a vehicle safety interval detection system. The system comprises a laser emitting head, a high-definition pick-up head and a real-time calculation chip, wherein the emission direction of the laser emitting head is parallel to the optical axis of a lens of the high-definition pick-up head, a signal output port of the high-definition pick-up head is connected with the real-time calculation chip through electric signals, and the real-time calculation chip receives image signals transmitted by the high-definition pick-up head in real time and then calculates and outputs a distance measurement value according to a given formula. The vehicle safety interval detection system is quite simple from material selection to manufacturing, and is low in production difficulty, low in cost, simple in product structure and good in application effect (high distance measurement accuracy and quite low misjudgment rate, there having promotion and application prospect.
Description
Technical field
The present invention relates to a kind of vehicle safety detecting for spaces system, be a kind of range unit.
Background technology
Radar system is traditional distance detector, and employing electromagnetic wave is detection means.Radar system
Application is the detection of large-scale dimension target.For in the detection application of ground object, ground thunder
Reaching and can form near-earth blind area under the interference of ground-reflected wave, the object being in blind area is difficult to by ground thunder
Reach and detect.The approach overcoming near-earth blind area at present has two kinds, a kind of spatial altitude being to improve radar,
The i.e. utilization of early warning plane;Another kind is to shorten electromagnetic wavelength, is reduced to millimeter wave from metric wave, but wavelength
What shortening brought is the significant increase of technical difficulty.Along with the development of automotive is with universal, low coverage
Active probing technique to guarantee the importance of daily traffic safety and necessity with time all increase.In daily traffic
Distance between vehicle is several meters to tens meters, and height of car is meter level, and electromagnetic wave detection is set by these 2
Put the highest technical threshold;Military radar technical costs is expensive, is difficult to be generalized to civil area;Ultrasonic
Ranging technology is similar with Radar Technology, and difference is that detection means is ultrasound wave, due to the biography of ultrasound wave
Broadcasting speed and be all far below electromagnetic wave far below electromagnetic wave, its frequency and wavelength, this feature makes ultrasound wave visit
Survey technology is suitable for the detection of ground object, but is generally only used for the reverse radar system of automobile.
Summary of the invention
The technical problem to be solved in the present invention is: at present due to technology with become present aspect, cause
Front truck range-measurement system is installed on civilian vehicle and implements that difficulty is big, Difficulty, provide for this one to become specially
This is cheap, technical difficulty is low, the vehicle safety detecting for spaces system that using effect is good, to solve problem,
Meet application required.
The technical solution adopted for the present invention to solve the technical problems is: a kind of vehicle safety detecting for spaces system
System, includes laser beam emitting head, high-definition camera and real-time computing chip, the launch party of laser beam emitting head
Parallel to the optical axis of the lens with high-definition camera, the signal output of high-definition camera with calculate core in real time
The sheet signal of telecommunication connects, and the definition testee distance away from high-definition camera is L, and laser beam emitting head is away from high definition
The distance of the lens axis of photographic head is H, and the focal length of lens is f, and testee is shone by laser beam emitting head
Penetrating formed hot spot image patch in high-definition camera to the pixel unit distance of lens axis is PPI,
The picture signal that computing chip real-time reception high-definition camera transmits in real time, by testee by Laser emission
Head irradiates the formed laser spot image patch in the high-definition camera pixel unit distance turn to lens axis
Turn to long measure distance h, according still further toFormula calculate with output L numerical value.
The invention has the beneficial effects as follows: this vehicle safety detecting for spaces system makes the simplest from drawing materials to
Just, production difficulty is low, with low cost, product structure is simple, using effect good (ranging accuracy height,
False Rate is extremely low), great promote the use of prospect.
Accompanying drawing explanation
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the structural representation (in figure, arrow represents light path) of the present invention.
In figure: 1. laser beam emitting head 2. high-definition camera 2-1. lens 3. calculate core in real time
Sheet
Detailed description of the invention
A kind of vehicle safety detecting for spaces system, as it is shown in figure 1, it includes laser beam emitting head 1, height
Clear photographic head 2 and in real time computing chip 3, transmitting direction and the high-definition camera 2 of laser beam emitting head 1
The optical axis of lens 2-1 is parallel, the signal output of high-definition camera 2 and real-time computing chip 3 signal of telecommunication
Connecting, the definition testee distance away from high-definition camera 2 is L, and laser beam emitting head 1 is away from high-definition camera
The distance of the lens 2-1 optical axis of 2 is H, and the focal length of lens 2-1 is f, and testee is sent out by laser
Penetrate a 1 formed laser spot image patch in high-definition camera 2 of the irradiation pixel list to lens 2-1 optical axis
The distance of positions from for PPI, the picture signal that real-time computing chip 3 real-time reception high-definition camera 2 transmits, will
Testee is irradiated formed hot spot image patch in high-definition camera 2 to lens by laser beam emitting head 1
The pixel unit distance of 2-1 optical axis is converted into long measure distance h, according still further toFormula meter
Calculate and the numerical value of output L.
This vehicle safety detecting for spaces system is generally mounted to the Herba Plantaginis position of vehicle, its range finding to front truck
Principle is as follows: according to convex lens imaging principle, the measured object distance away from high-definition camera 2 is saturating much larger than it
During the focal length of mirror 2-1, the imaging plane infinite tendency focal plane of high-definition camera 2, now can approximate and recognize
Overlapping with focal plane for imaging plane, the image space of measured object can be directly with through lens 2-1 photocentre
Ray determines with the focus of focal plane, as it is shown in figure 1, A point represents measured object Stimulated Light irradiates formation
Hot spot, B point represents hot spot through lens 2-1 imaging (on focal plane) in high-definition camera 2,
O point is lens 2-1 photocentres, and F point is lens 2-1 focuses, closes according to the corresponding ratio of similar triangles
, there is this relational expression in system:
In formula, OC is testee distance L away from high-definition camera 2, and AC is laser beam emitting head 1 away from height
Distance H of the lens 2-1 optical axis of clear photographic head 2, OF is lens 2-1 focal distance f, and BF is tested
Object is irradiated formed hot spot image patch in high-definition camera 2 to lens 2-1 by laser beam emitting head 1
Distance h of optical axis, therefore has a relational expression:
Then have
Such then can get the numerical value (measured object distance away from high-definition camera) of L, namely front truck and this car
Spacing.
During calculating at this, H Yu f is known parameters, and the length of only h is to need to measure in real time
, but the length of h can not directly be measured, and must be by the real-time computing chip 3 high-definition camera to receiving
2 picture signals transmitted process, and by laser beam emitting head 1, testee is irradiated formed light
Speckle image patch in high-definition camera 2 converts to the pixel unit distance of lens 2-1 optical axis, just may be used
Obtain the numerical value of the h of long measure.Certainly, pixel unit numerical value is converted into the skill of long measure numerical value
Art is prior art, known in the industry.
Above-described embodiment is only used for illustrating the present invention, rather than the restriction to rights protection of the present invention is all
It is the change of any unsubstantiality carried out on the basis of essence scheme of the present invention, the present invention all should be fallen into
Protection domain in.
Claims (1)
1. a vehicle safety detecting for spaces system, it is characterised in that: include laser beam emitting head (1),
High-definition camera (2) and in real time computing chip (3), the transmitting direction of laser beam emitting head (1) and high definition
The optical axis of the lens (2-1) of photographic head (2) is parallel, the signal output of high-definition camera (2) with
Computing chip (3) signal of telecommunication connects in real time, and the definition testee distance away from high-definition camera (2) is
L, the distance of the laser beam emitting head (1) lens (2-1) optical axis away from high-definition camera (2) is H, thoroughly
The focal length of mirror (2-1) is f, and testee is irradiated the hot spot formed at height by laser beam emitting head (1)
Image patch in clear photographic head (2) is PPI to the pixel unit distance of lens (2-1) optical axis, counts in real time
Calculate the picture signal that chip (3) real-time reception high-definition camera (2) transmits, by testee by laser
Emitting head (1) irradiates formed laser spot image patch in high-definition camera (2) to lens (2-1)
The pixel unit distance of optical axis is converted into long measure distance h, according still further toFormula calculate with
The numerical value of output L.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201610307135.1A CN105842682A (en) | 2016-05-06 | 2016-05-06 | Vehicle safety interval detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610307135.1A CN105842682A (en) | 2016-05-06 | 2016-05-06 | Vehicle safety interval detection system |
Publications (1)
Publication Number | Publication Date |
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CN105842682A true CN105842682A (en) | 2016-08-10 |
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ID=56591471
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CN201610307135.1A Withdrawn CN105842682A (en) | 2016-05-06 | 2016-05-06 | Vehicle safety interval detection system |
Country Status (1)
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107894212A (en) * | 2017-11-13 | 2018-04-10 | 北京市路兴公路新技术有限公司 | A kind of camera distance computing system, method and device |
CN109934034A (en) * | 2019-02-22 | 2019-06-25 | 无锡盈达聚力科技有限公司 | A kind of scanning means and barcode scanning method of Parameter adjustable |
CN110087002A (en) * | 2019-04-25 | 2019-08-02 | 维沃移动通信(杭州)有限公司 | A kind of image pickup method and terminal device |
CN114757889A (en) * | 2022-03-22 | 2022-07-15 | 中铁工程装备集团有限公司 | Air cushion bin of shield tunneling machine and liquid level detection method thereof |
Citations (4)
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US20050061949A1 (en) * | 2003-08-19 | 2005-03-24 | Decker Stephen W. | Range discriminating optical sensor |
CN101324430A (en) * | 2007-06-12 | 2008-12-17 | 北京航空航天大学 | Binocular odometry based on similarity principle |
CN104729459A (en) * | 2015-04-10 | 2015-06-24 | 武汉工程大学 | Driving ranging and collision warning unit based on ARM-Linux system |
CN104865566A (en) * | 2015-05-21 | 2015-08-26 | 上海理工大学 | Distance measurement method based on correlated imaging |
-
2016
- 2016-05-06 CN CN201610307135.1A patent/CN105842682A/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050061949A1 (en) * | 2003-08-19 | 2005-03-24 | Decker Stephen W. | Range discriminating optical sensor |
CN101324430A (en) * | 2007-06-12 | 2008-12-17 | 北京航空航天大学 | Binocular odometry based on similarity principle |
CN104729459A (en) * | 2015-04-10 | 2015-06-24 | 武汉工程大学 | Driving ranging and collision warning unit based on ARM-Linux system |
CN104865566A (en) * | 2015-05-21 | 2015-08-26 | 上海理工大学 | Distance measurement method based on correlated imaging |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107894212A (en) * | 2017-11-13 | 2018-04-10 | 北京市路兴公路新技术有限公司 | A kind of camera distance computing system, method and device |
CN109934034A (en) * | 2019-02-22 | 2019-06-25 | 无锡盈达聚力科技有限公司 | A kind of scanning means and barcode scanning method of Parameter adjustable |
CN110087002A (en) * | 2019-04-25 | 2019-08-02 | 维沃移动通信(杭州)有限公司 | A kind of image pickup method and terminal device |
CN110087002B (en) * | 2019-04-25 | 2020-10-02 | 维沃移动通信(杭州)有限公司 | Shooting method and terminal equipment |
CN114757889A (en) * | 2022-03-22 | 2022-07-15 | 中铁工程装备集团有限公司 | Air cushion bin of shield tunneling machine and liquid level detection method thereof |
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Application publication date: 20160810 |
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