CN202221814U - Multi-target three dimensional positioning inverted T-shaped antenna array and multichannel UWB life detection radar - Google Patents
Multi-target three dimensional positioning inverted T-shaped antenna array and multichannel UWB life detection radar Download PDFInfo
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- CN202221814U CN202221814U CN2011202755328U CN201120275532U CN202221814U CN 202221814 U CN202221814 U CN 202221814U CN 2011202755328 U CN2011202755328 U CN 2011202755328U CN 201120275532 U CN201120275532 U CN 201120275532U CN 202221814 U CN202221814 U CN 202221814U
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Abstract
The utility model discloses a multi-target three dimensional positioning inverted T-shaped antenna array and a multichannel UWB life detection radar. The inverted T-shaped antenna array comprises five antennas, separately being a transmitting antenna and four receiving antennas, the five antennas are located on a same plane in a space, the transmitting antenna and one of the receiving antennas are arranged in the center tightly to form a central unit, the other three receiving antennas are arranged at the left side, the right side of the central unit and above the central unit respectively to form an approximate inverted T-shaped antenna array. By using the inverted T-shaped antenna array structure to detect, the multi-target detection and three dimensional positioning of a detection system can be realized with the least antennas, and the simplest and most portable system structure.
Description
Technical field
The utility model relates to a kind of inverse-T-shaped aerial array and multichannel UWB life detection radar of multiple target three-dimensional localization, belongs to life detection The radar exploration technique field.
Background technology
The life detection radar is a kind of fusion Radar Technology and the penetrable nonmetal medium of biomedical engineering technology (brick wall, ruins etc.) noncontact, surveys a kind of emerging special radar of human life's body (breathing, heartbeat, body are moving etc.) at a distance.The life detection Radar Technology then is to be an emerging technology of the detection of a target with the life entity, is the very important cutting edge technology field that International Technology circle is generally acknowledged.Because this technology does not have any constraint to measured object; Need not the connection of contact electrode, transducer, cable etc.; And can be at a distance from certain distance, penetrate certain medium (like clothes, gauze, brick wall, ruins etc.) human body discerned detection, so can be widely used in that disaster buried person person searches and rescues, fields such as the monitoring of struggle against terror mid-board and battle reconnaissance.
At present, some key areas such as disaster assistance, national security have proposed new higher requirement to the life detection radar.But the ultra wide range life detection of single channel radar only can obtain the one-dimensional distance information of target, and the ultra wide range life detection of existing multichannel radar also just can be realized the two-dimensional localization to target range, orientation.If can realize detection and three-dimensional localization to a plurality of targets, will more horn of plenty and the accurately locating information of (three-dimensional) be provided for the rescue worker, help accurately suing and labouring; In addition, the realization of three-dimensional localization makes detecting rescue personnel single pass search coverage become bigger solid space by the plane, helps to improve the investigative range and the detection efficient of life detection radar.Mostly existing aerial array is the form of dot matrix (dual-mode antenna is approximate to be on the point) and linear array (each antenna is distributed on the two dimensional surface); They can only the detection of a target one-dimensional distance or realize two-dimensional localization of target; Aerial array like long dumbbell shape structure; This aerial array is 13 take-up array antenna form; Wherein 1 receive 1 antenna and closely arrange as for central authorities, and two other reception antenna place both sides (with central authorities a pair of dual-mode antennas on same straight line) the version of the long dumbbell of likeness in form, owing to it is a kind of version of linear array; So the aerial array of long dumbbell-shaped structure can only solve multiobject detection and two-dimensional localization problem, and can not realize multiobject three-dimensional localization; For a plurality of Three-dimension Target location, the situation of pseudo-shadow will appear in addition when the reception antenna number is less than 4.
The utility model content
Technical problem to be solved by this invention is the deficiency to prior art; Inverse-T-shaped aerial array (face battle array) the UWB life detection radar that provides a kind of multichannel can realize multiple target detection and three-dimensional localization solves the detection and the three-dimensional localization problem of a plurality of human body targets.
The present invention adopts following technical scheme:
A kind of inverse-T-shaped aerial array of multiple target three-dimensional localization; Said inverse-T-shaped aerial array comprises five antennas; Comprising a transmitting antenna and four reception antennas, said five antennas are in the space on the same plane, and transmitting antenna is closely arranged with one of them reception antenna and placed central authorities to form central location; Other three reception antennas place said central location left, right-hand and top respectively, form approximate inverse-T-shaped aerial array.
Use the multichannel UWB life detection radar of the inverse-T-shaped aerial array of said multichannel; Comprise UWB radar front end and processing unit; Said UWB radar front end comprises the inverse-T-shaped aerial array of multichannel, pulse oscillator, electromagnetic pulse generator, Sampling Integral device; Said transmitting antenna and each said reception antenna are formed a passage, form four passages altogether; Said pulse oscillator produces pulse signal, and this signal triggering electromagnetic pulse generator produces burst pulse, and radiate through said transmitting antenna; Reflected signal is delivered to the Sampling Integral device through each said reception antenna; The pulse signal that is produced by pulse oscillator produces range gate through delay circuit and range gate generator simultaneously; Select to received signal, signal is detected through accumulation back small-signal through the Sampling Integral circuit; And via amplifier and filter amplify, filtering obtains four road radar echo signals; Said four road radar echo signals are sent into processing unit after the sampling of high-speed a/d capture card, by processing unit four road radar echo signals that collect are carried out analyzing and processing and calculating, finally obtain a plurality of human body target spatial three-dimensional position information.
Described multichannel UWB life detection radar; Said processing unit comprises signal integration module, signal decomposition reconstructed module, digital filtering module and numerical differentiation module, spatial-frequency analysis module and target three-dimensional position computing module; Said signal integration module is carried out integration to four road radar echo signals respectively on distance; Said signal decomposition reconstructed module will pass through that four road radar echo signals behind the integration decompose respectively, reconstruct; Synthetic four road target echo signals and four road distance signals; Said digital filtering and numerical differentiation module are carried out digital filtering and numerical differentiation respectively to four road target echo signals; Said spatial-frequency analysis module is used for carrying out spatial-frequency analysis according to four road target echo signals after digital filtering and the numerical differentiation and four road distance signals, obtains four one-dimensional distance information of target; Said target three-dimensional position computing module is used for confirming that according to described four one-dimensional distance information calculations thereby the Three-dimension Target positional information realizes a plurality of Three-dimension Target location.
Proposed to realize the optimal antenna array structure mode of multiple target three-dimensional localization: inverse-T-shaped antenna array structure.Survey with this frame mode, can make detection system with minimum antenna, the simplest, the most portable system configuration realizes multiobject detection and three-dimensional localization.
Description of drawings
The inverse-T-shaped aerial array UWB of Fig. 1 multichannel life detection radar system theory diagram;
Fig. 2 is the inverse-T-shaped antenna array structure sketch map of multichannel.
Embodiment
Below in conjunction with specific embodiment, the utility model is elaborated.
Embodiment 1
Present embodiment at first provides a kind of inverse-T-shaped aerial array of multiple target three-dimensional localization; Said inverse-T-shaped aerial array comprises five antennas, comprising a transmitting antenna and four reception antennas; Said five antennas are in the space on the same plane; Transmitting antenna is closely arranged with one of them reception antenna and is placed central authorities to form central location, and other three reception antennas place central location left, right-hand and top respectively, form approximate inverse-T-shaped aerial array.
As shown in Figure 2, inverse-T-shaped aerial array is to name with the spatial form of aerial array.Aerial array is made up of a transmitting antenna and four reception antennas, and transmitting antenna is numbered with digital " 0 ", and four reception antennas are numbered with numeral " 1; 2; 3,4 " respectively, and each forms a passage to emission, reception antenna; Totally four passages, four passages are surveyed simultaneously and are realized multiobject three-dimensional localization.
Aerial array is placed on the xoz coordinate plane of rectangular coordinate system in space; Transmitting antenna 0 is positioned at the initial point of space coordinates; Reception antenna 4 closely is arranged in the passage of forming a transceiver with transmitting antenna 0; The antenna of transceiver since close together can be similar to and think the origin position that is in space coordinates; Other three reception antennas lay respectively on positive and negative semiaxis of x coordinate and the z coordinate positive axis and with the distance of coordinate origin and equate that this distance can be adjusted by azimuth resolution as required.
Can be by above-mentioned four-way aerial array to a plurality of realization of goal three-dimensional localization in space.
Proposed to realize the optimal antenna array structure mode of multiple target three-dimensional localization: inverse-T-shaped antenna array structure.Survey with this frame mode, can make detection system with minimum antenna, the simplest, the most portable system configuration realizes multiobject detection and three-dimensional localization.
Embodiment 2
The UWB life detection radar system theory diagram of using the inverse-T-shaped aerial array of multichannel is as shown in Figure 1.Comprise UWB radar front end and processing unit; Said UWB radar front end comprises the inverse-T-shaped aerial array of multichannel, pulse oscillator, electromagnetic pulse generator, Sampling Integral device; Said transmitting antenna and each said reception antenna are formed a passage, form four passages altogether; Said pulse oscillator produces pulse signal, and this signal triggering electromagnetic pulse generator produces burst pulse, and radiate through said transmitting antenna; Reflected signal is delivered to the Sampling Integral device through each said reception antenna; The pulse signal that is produced by pulse oscillator produces range gate through delay circuit and range gate generator simultaneously; Select to received signal, signal is detected through accumulation back small-signal through the Sampling Integral circuit; And via amplifier and filter amplify, filtering obtains four road radar echo signals; Said four road radar echo signals are sent into processing unit after the sampling of high-speed a/d capture card, by processing unit four road radar echo signals that collect are carried out analyzing and processing and calculating, finally obtain a plurality of human body target spatial three-dimensional position information.
Said processing unit comprises signal integration module, signal decomposition reconstructed module, digital filtering module and numerical differentiation module, spatial-frequency analysis module and target three-dimensional position computing module; Said signal integration module is carried out integration to four road radar echo signals respectively on distance; Said signal decomposition reconstructed module will pass through that four road radar echo signals behind the integration decompose respectively, reconstruct; Synthetic four road target echo signals and four road distance signals; Said digital filtering and numerical differentiation module are carried out digital filtering and numerical differentiation respectively to four road target echo signals; Said spatial-frequency analysis module is used for carrying out spatial-frequency analysis according to four road target echo signals after digital filtering and the numerical differentiation and four road distance signals, obtains four one-dimensional distance information of target; Said target three-dimensional position computing module is used for confirming that according to described four one-dimensional distance information calculations thereby the Three-dimension Target positional information realizes a plurality of Three-dimension Target location.
Described multichannel UWB life detection radar, said positioning result display mode is the three-dimensional coordinate of display-object.
In two dimensional surface, the position of target is to come confirming through the electromagnetic wave stroke is calculated, that is: the electromagnetic wave that sends of transmitting antenna arrives target, is returned by target reflection again, arrive again each reception antenna the stroke of process.Transmitting antenna Tx range-to-go is S
0(t), target is S to the distance of reception antenna Rx1
1(t), the distance to reception antenna Rx2 is S
2(t).Electromagnetic wave emits the arrival target from transmitting antenna Tx, returns to arrive reception antenna Rx1 and the used time of Rx2 is respectively τ from target reflection again
1=(S
0(t)+S
1(t))/and c, τ
2=(S
0(t)+S
2(t))/c.By τ
1And τ
2Can confirm two ellipses, the intersection point of two ellipses is the position of target.
In like manner, for one group of antenna that transmitting-receiving in the space separates, if the electromagnetic wave stroke is certain, then can confirm an ellipsoid, then can confirm a ball for the antenna of transceiver, detected target then is positioned on the surface of ellipsoid or ball.Two determined two ellipsoids of passage intersect at a curve; This curve passes the 3rd the determined ellipsoid of passage or sphere then can obtain about two points of aerial array in the face of claiming, three determined ellipsoids of passage of simultaneous or spherical equation can solve two groups and separate.Owing to be positioned a side of aerial array face, can get rid of one of them thus and separate and the coordinate that obtains a target by the target one surveyed.
The determined ELLIPTIC REVOLUTION of distance of transmitting antenna-impact point-reception antenna 1 is obtained elliptic equation to the ZOY face:
A wherein
1=τ
1* c/2,
τ
1For radar wave from the time that transmitting antenna-target-reception antenna 1 is experienced, c is the propagation velocity of radar wave in uniform dielectric, D is the distance from the transmitting antenna to the reception antenna.
Should ellipse rotate a circle and obtain the revolution ellipsoid equation around the Z axle:
In like manner can obtain can confirming second ellipsoid equation by the passage that transmitting antenna and No. 2 reception antennas are formed:
Passage by transmitting antenna and No. 3 reception antennas are formed can be confirmed the 3rd ellipsoid equation:
And transmitting antenna and No. 4 reception antennas are formed the transceiver passage, confirm a ball equation:
x
2+y
2+z
2＝R
2
Four equations of simultaneous obtain the equation group of multiple target three-dimensional localization:
R=τ wherein
3* c/2 τ
3For radar wave from the time that transmitting antenna-target-reception antenna 3 is experienced, c is the propagation velocity of radar wave in uniform dielectric.Separate the three-dimensional coordinate that above-mentioned equation group just can solve a plurality of impact points.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection range of the utility model accompanying claims according to above-mentioned explanation.
Claims (3)
1. the inverse-T-shaped aerial array of a multiple target three-dimensional localization; It is characterized in that said inverse-T-shaped aerial array comprises five antennas, comprising a transmitting antenna and four reception antennas; Said five antennas are in the space on the same plane; Transmitting antenna is closely arranged with one of them reception antenna and is placed central authorities to form central location, and other three reception antennas place said central location left, right-hand and top respectively, form approximate inverse-T-shaped aerial array.
2. application rights requires the multichannel UWB life detection radar of the inverse-T-shaped aerial array of 1 said multichannel; It is characterized in that; Comprise UWB radar front end and processing unit; Said UWB radar front end comprises the inverse-T-shaped aerial array of multichannel, pulse oscillator, electromagnetic pulse generator, Sampling Integral device, and said transmitting antenna and each said reception antenna are formed a passage, form four passages altogether; Said pulse oscillator produces pulse signal, and this signal triggering electromagnetic pulse generator produces burst pulse, and radiate through said transmitting antenna; Reflected signal is delivered to the Sampling Integral device through each said reception antenna; The pulse signal that is produced by pulse oscillator produces range gate through delay circuit and range gate generator simultaneously; Select to received signal, signal is detected through accumulation back small-signal through the Sampling Integral circuit; And via amplifier and filter amplify, filtering obtains four road radar echo signals; Said four road radar echo signals are sent into processing unit after the sampling of high-speed a/d capture card, by processing unit four road radar echo signals that collect are carried out analyzing and processing and calculating, finally obtain a plurality of human body target spatial three-dimensional position information.
3. multichannel UWB life detection radar according to claim 2; It is characterized in that; Said processing unit comprises signal integration module, signal decomposition reconstructed module, digital filtering module and numerical differentiation module, spatial-frequency analysis module and target three-dimensional position computing module; Said signal integration module is carried out integration to four road radar echo signals respectively on distance; Said signal decomposition reconstructed module will pass through that four road radar echo signals behind the integration decompose respectively, reconstruct; Synthetic four road target echo signals and four road distance signals; Said digital filtering and numerical differentiation module are carried out digital filtering and numerical differentiation respectively to four road target echo signals, and said spatial-frequency analysis module is used for carrying out spatial-frequency analysis according to four road target echo signals after digital filtering and the numerical differentiation and four road distance signals, obtain four one-dimensional distance information of target; Said target three-dimensional position computing module is used for confirming that according to described four one-dimensional distance information calculations thereby the Three-dimension Target positional information realizes a plurality of Three-dimension Target location.
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| CN2011202755328U CN202221814U (en) | 2011-08-01 | 2011-08-01 | Multi-target three dimensional positioning inverted T-shaped antenna array and multichannel UWB life detection radar |
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| CN2011202755328U CN202221814U (en) | 2011-08-01 | 2011-08-01 | Multi-target three dimensional positioning inverted T-shaped antenna array and multichannel UWB life detection radar |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108078555A (en) * | 2016-11-23 | 2018-05-29 | 南京理工大学 | A kind of vital sign remote monitoring device based on Kalman filtering and target following |
| CN108490435A (en) * | 2018-02-09 | 2018-09-04 | 湖南正申科技有限公司 | A kind of strong penetrability three-dimensional radar life detection positioning device of high-resolution |
| CN108761450A (en) * | 2018-08-07 | 2018-11-06 | 湖南华诺星空电子技术有限公司 | A kind of life detection radar of three-dimensional localization |
| CN111273274A (en) * | 2020-03-12 | 2020-06-12 | 四川九洲电器集团有限责任公司 | Multi-base cooperative positioning method, storage medium, radar and radar positioning system |
| CN117687101A (en) * | 2024-02-04 | 2024-03-12 | 中国石油大学(华东) | Multichannel radio detection and positioning device |
-
2011
- 2011-08-01 CN CN2011202755328U patent/CN202221814U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108078555A (en) * | 2016-11-23 | 2018-05-29 | 南京理工大学 | A kind of vital sign remote monitoring device based on Kalman filtering and target following |
| CN108490435A (en) * | 2018-02-09 | 2018-09-04 | 湖南正申科技有限公司 | A kind of strong penetrability three-dimensional radar life detection positioning device of high-resolution |
| CN108490435B (en) * | 2018-02-09 | 2021-02-09 | 湖南正申科技有限公司 | High-resolution high-penetrability three-dimensional radar life detection positioning device |
| CN108761450A (en) * | 2018-08-07 | 2018-11-06 | 湖南华诺星空电子技术有限公司 | A kind of life detection radar of three-dimensional localization |
| CN111273274A (en) * | 2020-03-12 | 2020-06-12 | 四川九洲电器集团有限责任公司 | Multi-base cooperative positioning method, storage medium, radar and radar positioning system |
| CN111273274B (en) * | 2020-03-12 | 2022-03-18 | 四川九洲电器集团有限责任公司 | Multi-base cooperative positioning method, storage medium, radar and radar positioning system |
| CN117687101A (en) * | 2024-02-04 | 2024-03-12 | 中国石油大学(华东) | Multichannel radio detection and positioning device |
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Granted publication date: 20120516 Termination date: 20120801 |