CN216979292U

CN216979292U - Laser radar transmitting and receiving system

Info

Publication number: CN216979292U
Application number: CN202123342686.7U
Authority: CN
Inventors: 高阳; 张正正; 陈梦; 张帆
Original assignee: Wuhan Wanji Photoelectric Technology Co Ltd
Current assignee: Wuhan Wanji Photoelectric Technology Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-15
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a laser radar transmitting and receiving system, comprising: the laser device comprises an emitting component, a spectroscope, a shared lens and a receiving component, wherein laser emitted by the emitting component passes through the spectroscope and then exits from the shared lens; the emergent laser is irradiated on a target to form an echo, the echo is received by the common lens, and the echo is reflected by the spectroscope after passing through the common lens, so that the echo is received by the receiving component. The system realizes the aim of reducing the number of lenses of the laser radar receiving and transmitting system by changing the position of the light splitting device of the coaxial receiving and transmitting system and simultaneously adding the shared lens of the transmitting system and the receiving system, thereby achieving the aim of saving the manufacturing cost of the laser radar receiving and transmitting system.

Description

Laser radar transmitting and receiving system

Technical Field

The present disclosure relates to the field of laser detection, and in particular, to a laser radar transceiver system.

Background

The laser radar is widely used for accurately detecting the distance, the angle, the speed and the shape of a target, and has a good application prospect.

The laser radar transmits laser through the transmitting system, receives echo signals through the receiving system after the laser is reflected by a measured object, and obtains distance information of the measured object by comparing time difference between the signals. In order to realize multi-line scanning, the laser radar adopting the coaxial optical path needs to arrange a plurality of transmitting and receiving systems, so that the system cost is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, the present invention provides a laser radar transmitting/receiving system. By changing the position of the light splitting device of the coaxial receiving and transmitting system, a lens shared by the transmitting system and the receiving system is added, the number of lenses of the laser radar receiving and transmitting system is reduced, and the cost of the laser radar receiving and transmitting system is saved.

A lidar transceiver system comprising: an emission component, a spectroscope, a shared lens and a receiving component,

laser emitted by the emitting component passes through the beam splitter and then exits from the common lens;

the emergent laser is irradiated on a target to form an echo, the echo is received by the common lens, and the echo is reflected by the spectroscope after passing through the common lens, so that the echo is received by the receiving component.

In one embodiment, the transceiver system further includes a converging lens located between the beam splitter and the receiving assembly, the converging lens being configured to converge the echo reflected by the beam splitter to the receiving assembly.

In one embodiment, the transceiver system further includes a pre-collimating lens, the pre-collimating lens is located between the emission component and the beam splitter, and the pre-collimating lens is configured to collimate the laser light emitted by the emission component.

In one embodiment, the beam splitter is a mirror including a transmissive aperture,

the laser emitted by the emitting component exits from the transmission hole, and the part of the reflector except the transmission hole receives the echo.

In one embodiment, the emission assembly includes a laser source for emitting an outgoing laser light.

In one embodiment, the receiving assembly includes a detector for receiving echoes converged by the converging lens.

In one embodiment, the common lens includes: and the positive lens is used for emitting laser and receiving echo.

In one embodiment, the converging lens includes a receiving lens group for converging the echoes.

In one embodiment, the pre-collimating lens includes a fast axis collimating lens for collimating the fast axis of the exiting laser light.

In one embodiment, the detector is one of an APD array, an avalanche diode array, or a silicon photomultiplier (SiPM) array.

In this embodiment, a laser radar transmission/reception system includes: the laser device comprises an emitting component, a spectroscope, a shared lens and a receiving component, wherein laser emitted by the emitting component passes through the spectroscope and then exits from the shared lens; the emergent laser is irradiated on a target to form an echo, the echo is received by the common lens, and the echo is reflected by the spectroscope after passing through the common lens, so that the echo is received by the receiving component. The system realizes the aim of reducing the number of lenses of the laser radar receiving and transmitting system by changing the position of the light splitting device of the coaxial receiving and transmitting system and adding the shared lens of the transmitting system and the receiving system, thereby achieving the aim of saving the manufacturing cost of the laser radar receiving and transmitting system.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a laser radar transmitting and receiving system according to an embodiment of the present invention.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the description of the present invention, it is to be understood that the terms "inner", "outer", "upper", "bottom", "front", "back", and the like, if any, refer to the orientation or positional relationship shown in FIG. 1, which is used for ease of description and simplicity of description only, and does not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be considered limiting.

As shown in fig. 1, a schematic structural diagram of a lidar transceiver system according to an embodiment of the present invention is provided, where the lidar transceiver system includes: a transmitting component 1, a spectroscope 2, a common lens 3, a receiving component 4,

the laser emitted by the emitting component 1 passes through the beam splitter and then exits from the common lens; the emitted laser hits the target to form an echo, the echo is received by the common lens 3, and the echo is reflected by the spectroscope 2 after passing through the common lens 3, so that the echo is received by the receiving component 4.

The receiving and transmitting system of the laser radar in the embodiment achieves the aim of reducing the number of lenses of the receiving and transmitting system of the laser radar by changing the position of the light splitting device of the coaxial receiving and transmitting system and additionally arranging the lens shared by the transmitting system and the receiving system, and further achieves the aim of saving the manufacturing cost of the receiving and transmitting system of the laser radar.

In one embodiment, the transceiver system further includes a converging lens 5, the converging lens 5 is located between the beam splitter 2 and the receiving assembly 4, and the converging lens 5 is used for converging the echo reflected by the beam splitter 2 to the receiving assembly 4. The embodiment converges the echo reflected by the beam splitter through the converging lens so that the echo is received by the receiving component. Optionally, the receiving assembly comprises a detector for receiving echoes converged by the converging lens. Optionally, the converging lens comprises a receiving lens group for converging the echoes. The detector may be an APD array, an avalanche diode array, or a silicon photomultiplier (SiPM) array. After the detector receives the detection signal, the photoelectric conversion circuit converts the signal into an electric signal, the electric signal is processed by the processor, and the processor calculates the distance of the detection target according to a set processing algorithm. The processor calculates the detection distance according to the flight time of the light wave, and of course, other current algorithms may be used to calculate the distance.

In one embodiment, the transceiver system further includes a pre-collimating lens, the pre-collimating lens is located between the emission component and the beam splitter, and the pre-collimating lens is configured to collimate the laser light emitted by the emission component. The pre-collimating lens comprises a fast axis collimating lens used for collimating the fast axis of the emergent laser. The spectroscope in the utility model has dual functions of light splitting and reflection, so the assembly requirement is obviously higher; the pre-collimating lens can collimate the projected laser, and further can reduce the difficulty of light adjustment when entering the spectroscope.

In one embodiment, the beam splitter is a mirror including a transmission hole, the laser light emitted from the emission unit exits from the transmission hole, and the portion of the mirror other than the transmission hole receives the echo.

In one embodiment, the emission assembly includes a laser source for emitting an outgoing laser light. The laser light source can be a semiconductor diode laser, and a semiconductor Laser Diode (LD) has the advantages of small volume, simple structure, high efficiency and direct modulation.

In one embodiment, the common lens includes: and the positive lens is used for emitting laser and receiving echo. Optionally, the size of the common lens can be enlarged according to actual trial conditions, so that the receiving moral energy of the laser radar receiving and transmitting system is improved, and the detection distance and the detection performance are improved.

In another optional embodiment, the present invention further provides a lidar including the lidar transceiver system in the above embodiment. The working principle and the beneficial effect of the laser radar in this embodiment have been described in detail in the above optical path system, and are not described herein again.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the utility model. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

In the description of the embodiments of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Claims

1. A lidar transceiver system comprising: an emitting component, a spectroscope, a shared lens and a receiving component,

2. The transceiver system of claim 1, further comprising a focusing lens between the beam splitter and the receiving assembly, the focusing lens configured to focus the echo reflected by the beam splitter to the receiving assembly.

3. The transceiver system of claim 1, further comprising a pre-collimating lens disposed between the transmitting assembly and the beam splitter, the pre-collimating lens being configured to collimate the laser light transmitted by the transmitting assembly.

4. The transceiver system of claim 1, wherein the beam splitter is a mirror including a transmission aperture,

5. The transceiver system of claim 1, wherein the launch assembly comprises a laser source for launching the outgoing laser light.

6. The transceiver system of claim 1, wherein the receive assembly comprises a probe for receiving echoes converged by a converging lens.

7. The transceiving system of claim 1, wherein the common lens comprises: and the positive lens is used for emitting laser and receiving echo.

8. The transceiving system of claim 2, wherein the convergent lens comprises a receive lens group for converging the echo.

9. The transceiver system of claim 3, wherein the pre-collimating lens comprises a fast axis collimating lens for collimating the fast axis of the exiting laser light.

10. The transceiver system of claim 6, wherein the detector is one of an APD array, an avalanche diode array, or a silicon photomultiplier array.