CN108957465B - Pulse laser detection device that many first special-shaped photosurfaces received - Google Patents

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

A kind of pulsed laser detection device received by multi-element special-shaped photosensitive surface

technical field

The invention belongs to the technical field of laser detection, and relates to a pulsed laser detection device received by a multi-element special-shaped photosensitive surface.

Background technique

At present, laser detection technology is more and more widely used in aerospace, geographic exploration, unmanned and other space exploration fields. The principle of laser detection is that the laser detection device emits a detection signal (laser beam) to the target, and then the received signal (target echo) reflected from the target is compared with the transmitted signal, and after proper processing, the target can be obtained. information, such as target distance, azimuth, altitude, speed, attitude, and even shape and other parameters, so as to detect, track and identify aircraft, missiles or other objects. The laser detection device is composed of a laser transmitter, an optical receiver, and an information processing system. A laser transmitter generally corresponds to an optical receiver. Measure the time required for the laser to travel to and from the target, and then multiply it by the speed of light c to calculate the distance D between the laser detection device and the target. In order to increase the detection range, the laser light emitted by the laser transmitter often has 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.

SUMMARY OF THE INVENTION

In view of this, the present invention provides a pulsed laser detection device received by a multi-element special-shaped photosensitive surface, which can solve the problem of low spatial angular resolution of the current laser detection device.

A pulsed laser detection device received by a multi-element special-shaped photosensitive surface, the device comprises a laser transmitter, a multi-element special-shaped receiver and an information processing system; The number of bins is increased or decreased according to the accuracy requirements of the laser detection device;

The receiving surface elements are arranged in the same direction and are perpendicular to the center line between the multi-dimensional special-shaped receiver and the laser transmitter. Each receiving surface element is connected to the information processing system through an independent line. Field of view, the laser transmitter emits a laser beam to the target, after being reflected by the target, the laser echo is received by the receiving panel and converted into an electrical signal, and finally 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 from the middle position of the receiver.

Beneficial effects:

1. The present invention uses the pulsed laser detection device received by the multi-shaped special-shaped photosensitive surface to detect the target. Since the overall field of view of the detector is divided into a plurality of small fields of view, when a target is detected, the information processing system analyzes the signal from the One surfel output can know that the target is within a corresponding small field of view. Compared with the laser detector with only one large field of view, the pulsed laser detection device received by the multi-element special-shaped photosensitive surface can not only ensure a larger overall detection field of view, but also have a higher spatial angular resolution, so that the target is more accurate. the spatial location.

2. In the present invention, the area of the receiving surface element is designed to be small near the middle position of the receiver and large far from the middle position of the receiver. The design of the "special-shaped" photosensitive surface enables each photosensitive surface in the laser receiver to receive enough reflected photons when detecting the target, which ensures the reliability of the detector function.

Description of drawings

Fig. 1, Fig. 2 are the structural principle diagrams of the detection device of the present invention;

FIG. 3 is a schematic diagram of the distribution of field angles of a receiving surface element.

Among them, 1-laser transmitter, 2-multiple shaped receiver, 3-information processing system, 4-receiving facet.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in Figures 1 and 2, the present invention provides a pulsed laser detection device received by a multi-component special-shaped photosensitive surface. The device includes a laser transmitter 1, a multi-component special-shaped receiver 2 and an information processing system 3. Eight receiving surfaces Elements 4 (A~H) are distributed on the multi-element special-shaped receiver, arranged in the same direction and perpendicular to the center line between the multi-element special-shaped receiver 2 and the laser transmitter 1, and each receiving surface element 4 is connected with information through independent lines. The processing system 3 is connected, and the size of the receiving surface element 4 is the small one near the middle of the receiver and the large one near the two sides of the receiver. In addition, each receiving surface element 4 has its own field of view angle of different size, the distribution of which is shown in FIG. 3 .

The laser transmitter 1 is used to emit laser beams to the target; the multivariate shaped receiver 2 is used to receive the reflected echo of the target; the information processing system is used to analyze which small field of view (A~H) the target is in.

The detection device emits a laser beam to the target through the laser transmitter 1. After being reflected by the target, the laser echoes are received by the eight receiving surface elements 4 and converted into electrical signals, and finally transmitted to the information processing system for analysis.

The specific working process of this device is as follows:

Step 1, the laser detection device emits a pulsed laser beam through a laser transmitter;

Step 2. The multi-element special-shaped receiver receives the reflected echo: the pulsed laser beam enters the field of view of the receiving panel 4 after being reflected by the target, and is received by the eight receiving panel 4 and converted into an electrical signal;

Step 3. Each of the eight electrical signals is transmitted to the information processing system for analysis: the time it takes for the laser to travel to and from the target is multiplied by the speed of light c to calculate the distance D between the detection device and the target, according to which photosensitive surface (A～H) the electrical signal comes from Know which small field of view the target is in (A~H);

So far, a pulsed laser detection device received by a multi-element special-shaped photosensitive surface has achieved target positioning with higher spatial angular resolution.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (1)

1. a pulsed laser detection device received by a multi-element special-shaped photosensitive surface, is characterized in that, the device comprises a laser transmitter, a multi-element special-shaped receiver and an information processing system; wherein, two or more are distributed on the surface of the multi-element special-shaped receiver The number of receiving panels is increased or decreased according to the accuracy requirements of the laser detection device; The receiving surface elements are arranged in the same direction and are perpendicular to the center line between the multi-dimensional special-shaped receiver and the laser transmitter. Each receiving surface element is connected to the information processing system through an independent line. Field of view, the laser transmitter emits a laser beam to the target, after being reflected by the target, the laser echo is received by the receiving panel and converted into an electrical signal, and finally transmitted to the information processing system for analysis; The area of the receiving surface element is small near the middle position of the receiver and large far from the middle position of the receiver.

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