CN108957465B - Pulse laser detection device that many first special-shaped photosurfaces received - Google Patents
Pulse laser detection device that many first special-shaped photosurfaces received Download PDFInfo
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- CN108957465B CN108957465B CN201810580538.2A CN201810580538A CN108957465B CN 108957465 B CN108957465 B CN 108957465B CN 201810580538 A CN201810580538 A CN 201810580538A CN 108957465 B CN108957465 B CN 108957465B
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- receiving surface
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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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
Abstract
The invention discloses a pulse laser detection device for receiving a multi-element special-shaped photosensitive surface, and belongs to the technical field of laser detection. The device comprises a laser transmitter, a multi-element special-shaped receiver and an information processing system; more than two receiving surface elements are distributed on the surface of the multi-element special-shaped receiver, and the number of the receiving surface elements is increased or decreased according to the precision requirement of the laser detection device; the receiving surface elements are arranged in the same direction and perpendicular to a central connecting line of the multi-element special-shaped receiver and the laser transmitter, each receiving surface element is connected with the information processing system through an independent line, each receiving surface element is provided with a view angle with different sizes, the laser transmitter transmits laser beams to the target, laser echoes are received by the receiving surface elements and converted into electric signals after being reflected by the target, and finally the electric signals are transmitted to the information processing system for analysis. The invention can solve the problem of lower spatial angle resolution of the current laser detection device.
Description
Technical Field
The invention belongs to the technical field of laser detection, and relates to a pulse laser detection device for receiving a multi-element special-shaped photosensitive surface.
Background
At present, the laser detection technology is more and more widely applied to the space detection fields of aerospace, geographic exploration, unmanned driving and the like. The principle of laser detection is that a laser detection device emits a detection signal (laser beam) to a target, and then the received signal (target echo) reflected from the target is compared with the emission signal, and after appropriate processing, relevant information of the target, such as target distance, azimuth, altitude, speed, attitude, even shape and other parameters, can be obtained, so as to detect, track and identify an airplane, a missile or other ground object targets. The laser detection device is composed of a laser transmitter, an optical receiver, an information processing system and the like, wherein one laser transmitter generally corresponds to one optical receiver. The time required by the laser to come and go to the target is measured, and then the distance D between the laser detection device and the target is calculated by multiplying the time by the light speed c. To increase the detection range, the laser light emitted by the laser emitter tends to have a larger divergence angle, which reduces the spatial angular resolution of the detector. That is, when the detector detects the target, it can only determine that the target is within the divergence angle, but cannot obtain a finer spatial position.
Disclosure of Invention
In view of this, the invention provides a pulsed laser detection device received by a multi-element special-shaped photosurface, which can solve the problem of low spatial and angular resolution of the current laser detection device.
A pulse laser detection device for receiving a multi-element special-shaped photosensitive surface comprises a laser transmitter, a multi-element special-shaped receiver and an information processing system; the surface of the multi-element special-shaped receiver is distributed with more than two receiving surface elements, and the number of the receiving surface elements is increased or decreased according to the precision requirement of the laser detection device;
the receiving surface elements are arranged in the same direction and perpendicular to a central connecting line of the multi-element special-shaped receiver and the laser transmitter, each receiving surface element is connected with the information processing system through an independent line, each receiving surface element is provided with a view angle with different sizes, the laser transmitter transmits laser beams to the target, laser echoes are received by the receiving surface elements and converted into electric signals after being reflected by the target, and finally the electric signals are transmitted to the information processing system for analysis.
Further, the area of the receiving surface element is small near the middle position of the receiver and large far away from the middle position of the receiver.
Has the advantages that:
1. the invention uses the pulse laser detection device received by the multi-element special-shaped photosensitive surface to detect the target, because the overall field angle of the detector is divided into a plurality of small field angles, when the target is detected, the information processing system can know that the target is positioned in a corresponding small field angle by analyzing signals and outputting the signals by one surface element. Compared with a laser detector with a large field angle, the pulse laser detection device received by the multi-element special-shaped photosensitive surface can ensure a larger overall detection field of view and has higher spatial angular resolution, so that a more accurate spatial position of a target is obtained.
2. The area of the receiving surface element is designed to be small close to the middle position of the receiver and large far away from the middle position of the receiver. The design of the special-shaped photosensitive surface ensures that each photosensitive surface in the laser receiver can receive enough reflected photons when detecting a target, thereby ensuring the reliability of the function of the detector.
Drawings
FIG. 1 and FIG. 2 are schematic structural diagrams of the detecting device of the present invention;
fig. 3 is a schematic view of the field angle distribution of the receiving surface element.
The system comprises a 1-laser transmitter, a 2-multivariate special-shaped receiver, a 3-information processing system and a 4-receiving surface element.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1 and 2, the present invention provides a pulsed laser detection device for receiving multiple-element special-shaped photosensitive surfaces, which includes a laser transmitter 1, multiple-element special-shaped receivers 2 and an information processing system 3, wherein eight receiving surface elements 4(a to H) are distributed on the multiple-element special-shaped receivers, are arranged along the same direction and are perpendicular to a central connecting line of the multiple-element special-shaped receivers 2 and the laser transmitter 1, each receiving surface element 4 is connected with the information processing system 3 through an independent line, and the size of the receiving surface element 4 is small near the middle of the receiver and large near two sides of the receiver. In addition, each receiving surface element 4 has a different field angle, which is distributed as shown in fig. 3.
The laser emitter 1 is used for emitting laser beams to a target; the multi-element special-shaped receiver 2 is used for receiving the reflected echo of the target; the information processing system is used for analyzing which small field angle (A-H) the target is in.
The detection device transmits laser beams to a target through the laser transmitter 1, laser echoes are received by the eight receiving surface elements 4 and converted into electric signals after being reflected by the target, and finally the electric signals are respectively transmitted to the information processing system for analysis.
The specific working process of the device is as follows:
step one, a laser detection device emits a pulse laser beam through a laser emitter;
step two, the multi-element special-shaped receiver receives the reflected echo: the pulse laser beams enter the field angle of the receiving surface element 4 after being reflected by the target, and are received by the eight receiving surface elements 4 and converted into electric signals;
and step three, respectively transmitting the eight electric signals to an information processing system for analysis: multiplying the time spent by the laser to and fro the target by the light speed c to calculate the distance D between the detection device and the target, and acquiring which small field angle the target is in (A-H) according to which photosensitive surface (A-H) the electric signal comes from;
therefore, the pulse laser detection device for receiving the multi-element special-shaped photosurface realizes target positioning with higher spatial and angular resolutions.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. A pulse laser detection device for receiving a multi-element special-shaped photosensitive surface is characterized by comprising a laser transmitter, a multi-element special-shaped receiver and an information processing system; the surface of the multi-element special-shaped receiver is distributed with more than two receiving surface elements, and the number of the receiving surface elements is increased or decreased according to the precision requirement of the laser detection device;
the receiving surface elements are arranged in the same direction and perpendicular to a central connecting line of the multi-element special-shaped receiver and the laser transmitter, each receiving surface element is connected with the information processing system through an independent line, each receiving surface element has a view angle with different size, the laser transmitter transmits laser beams to a target, laser echoes are received by the receiving surface elements and converted into electric signals after being reflected by the target, and finally the electric signals are transmitted to the information processing system for analysis;
the area of the receiving surface element is small close to the middle position of the receiver and large far away from the middle position of the receiver.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810580538.2A CN108957465B (en) | 2018-06-07 | 2018-06-07 | Pulse laser detection device that many first special-shaped photosurfaces received |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810580538.2A CN108957465B (en) | 2018-06-07 | 2018-06-07 | Pulse laser detection device that many first special-shaped photosurfaces received |
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| CN108957465A CN108957465A (en) | 2018-12-07 |
| CN108957465B true CN108957465B (en) | 2022-05-20 |
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| CN108957465A (en) | 2018-12-07 |
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