阅读说明：本技术 一种滑环及激光雷达 (Slip ring and laser radar ) 是由 陈杰 向少卿 于 2019-08-30 设计创作，主要内容包括：本发明公开了一种滑环,包括第一圆环体、第二圆环体和多个导电部件；所述第一圆环体和所述第二圆环体中心重合,且第二圆环体套设于第一圆环体之中；所述第一圆环体和所述第二圆环体通过所述多个导电部件连接。本发明能够通过多个片状导电部件形成滑环,可大大提高滑环的寿命和信号传输的可靠性。(The invention discloses a slip ring, which comprises a first annular body, a second annular body and a plurality of conductive parts, wherein the first annular body is provided with a first opening; the centers of the first circular ring body and the second circular ring body are superposed, and the second circular ring body is sleeved in the first circular ring body; the first torus and the second torus are connected by the plurality of conductive members. The invention can form the slip ring through a plurality of flaky conductive parts, can greatly improve the service life of the slip ring and the reliability of signal transmission.)

1. A slip ring comprising a first torus, a second torus, and a plurality of electrically conductive members;

The centers of the first circular ring body and the second circular ring body are superposed, and the second circular ring body is sleeved in the first circular ring body;

The first torus and the second torus are connected by the plurality of conductive members.

2. Slip ring according to claim 1, wherein the first torus and the second torus are relatively rotatable.

3. Slip ring according to claim 2, wherein the inner circumferential side wall of the first torus is provided with a plurality of grooves adapted to fix one end of the conductive member, the other end of the conductive member being in circumferential abutment with the second torus.

4. Slip ring according to claim 3, wherein the other end of the electrically conductive member is tangential to the circumference of the second torus.

5. Slip ring according to claim 3, characterized in that the plurality of grooves bisects the inner circumferential side wall of the first cylinder.

6. The slip ring of claim 3 wherein the arc of the groove is substantially flush with one end of the conductive member.

7. The slip ring of claim 6 wherein said first torus and said conductive member are secured to each other with through hole screws at the interface of said recess and one end of said conductive member.

8. Slip ring according to claim 3, characterized in that the conductive member is extended by a length of a predetermined magnitude within the groove in addition to the length of abutment of the groove with one end of the conductive member.

9. Slip ring according to claim 1, characterized in that the conductive part is sheet-like and has a thickness of a predetermined magnitude.

10. the slip ring of claim 1 wherein said first torus, said second torus and said conductive member are electrically conductive and wear resistant materials.

11. Lidar comprising a central shaft and a slip ring according to any of claims 1 to 10, wherein said slip ring is mounted on said central shaft.

Technical Field

The invention relates to the technical field of electrical structures, in particular to a slip ring device for information transmission of a rotor and a stator in a laser radar and the laser radar with the slip ring.

Background

Any rotating parts require power if any electronics are present. A typical slip ring cannot be used for more than a year because of wear of the carbon brushes. Therefore, the mechanical laser radar generally adopts a wireless power supply technology. However, the difficulty of wireless power supply is quite high, the process is complex, the cost is still high, and the problems of EMC leakage and the like exist in an unconventional manner.

The slip ring is an electrical component responsible for communicating the rotating body and transmitting energy and signals. The slip rings are classified into an electrical slip ring, a fluid slip ring, and an optical slip ring according to a transmission medium. The slip ring is usually installed at the rotation center of the equipment and mainly consists of two parts, namely a rotating part and a static part. The rotating part is connected to and moves with the rotating structure of the device, called the "rotor", and the stationary part is connected to the energy source of the stationary structure of the device, called the "stator".

The slip ring can be used in the field of any electromechanical system which continuously transmits power and data signals in 360-degree rotation, and is often called as a conductive ring body, an electric brush, an adapter, a collecting ring, a current collector, a rotary joint, a collecting ring, a reflux ring, a commutator and the like, and the principle of the slip ring is a precise transmission device for realizing the current, data signals or image and power transmission of two relative rotating mechanisms. The device is usually used for 360-degree unlimited continuous rotation, and is required to be used in the field of transmitting electric signals and data signals from a fixed position to a rotating position.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a slip ring with a long service life, and the specific technical solution is as follows:

A slip ring comprising a first torus, a second torus, and a plurality of electrically conductive members; the centers of the first circular ring body and the second circular ring body are superposed, and the second circular ring body is sleeved in the first circular ring body; the first torus and the second torus are connected by the plurality of conductive members.

Further, the first torus and the second torus can rotate relatively.

furthermore, a plurality of grooves are formed in the circumferential side wall of the inner portion of the first annular body and are suitable for fixing one end of the conductive component, and the other end of the conductive component is attached to the circumferential direction of the second annular body.

Further, the other end of the conductive member is tangential to the circumferential direction of the second torus.

Further, the plurality of grooves bisects the inner circumferential sidewall of the first cylinder.

Further, the arc of the groove almost completely conforms to one end of the conductive member.

Furthermore, at the joint of the groove and one end of the conductive part, the first annular body and the conductive part are fixed with each other by a through hole screw.

further, the conductive member is extended by a length of a predetermined size in the groove in addition to a length of the fit of the groove and one end of the conductive member.

Further, the conductive member is sheet-shaped and has a thickness of a predetermined size.

Further, the first ring body, the second ring body and the conductive part are made of conductive wear-resistant materials.

Another objective of the present invention is to provide a lidar, which comprises the following specific technical solutions:

the laser radar is characterized by comprising a central shaft and the slip ring, wherein the slip ring is sleeved on the central shaft.

The implementation of the invention has the following beneficial effects:

The invention increases the reliability and effectiveness of data transmission by arranging a plurality of conductive parts, and can ensure the performance of the laser radar when being applied to the laser radar.

additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic overall structure diagram of a slip ring provided in an embodiment of the present invention;

FIG. 2 is a block diagram of a lidar provided by an embodiment of the present invention;

FIG. 3 is a view showing a scanning portion of the laser radar according to the present invention;

FIG. 4 is a schematic view of the installation of the laser radar of the present invention in cooperation with a slip ring;

FIG. 5 is a schematic view of another lidar cooperating with a slip ring provided by the present invention;

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

in the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or may be connected through the interior of two elements or in interactive relation with one another. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic view of an overall structure of a slip ring according to an embodiment of the present invention. The slip ring 100 includes a first torus 110, a second torus 120, a conductive member 130, and the first torus 110 and the second torus 120 are slidably connected by the conductive member 130.

The first circular ring body 110 comprises a first side surface 110-1 and a second side surface 110-2, wherein the second side surface 110-2 is circumferentially provided with a plurality of grooves, the grooves can be equally or unequally distributed around the first circular ring body in the circumferential direction, and the number of the grooves and the number of the conductive components which can be mounted can be equal. The second torus 120 includes a first side 120-1 and a second side 120-2. The second side 110-2 of the first torus 110 is disposed opposite the first side 120-1 of the second torus 120 by a distance that is related to the size and material of the conductive member 130 and the equipment to be mounted thereon. The conductive member 130 is a plate-shaped structure having a predetermined thickness, and can be fixed to the second side surface 110-2 of the first circular ring body 110 by screws while contacting the first side surface 120-1 of the second circular ring body 120, and the number of the threaded through holes may be one or more. For example, one end of the conductive component 130 is adapted to be fixed in a groove of the second side surface 110-2 of the first circular ring body 110 by a through-hole screw, the radian of the groove is almost completely attached to the conductive component 130, the other end of the conductive component 130 is circumferentially tangent to the first side surface 120-2 of the second circular ring body 120, except for the attached portion, the conductive component may have a length with a preset size in the groove, and the increased length may make the attaching effect better and also increase the mounting stability of the conductive component 130. In another embodiment, the conductive member 130 can also be fixed to the first side 120-1 of the second circular ring 120, and the side can have a similar groove as the first circular ring 110. The slip ring is constructed to enable the conductive part to be in better contact with the second annular body, so that data can be transmitted more effectively, and information transmission faults in the sliding process are reduced. The conductive member may be a metal sheet having a conductive function, or may be a non-metal sheet having a conductive function, and may have a certain conductivity and be durable and wear-resistant. In addition, in order to ensure the safety of electrical connection during rotation, a protective film may be provided on the conductive member to prevent short circuit and the like.

when the first circular ring body 110 is loaded in the external communication device, the first circular ring body 110 and the second circular ring body 120 move relatively, and when the first circular ring body 110 is connected with the communication device moving part, the second circular ring body 120 is connected with the communication device fixing part, or vice versa. When relatively moving, the first torus 110 is in sliding contact with the second torus 120 through the conductive member 130. The conductive elements 130 and the second torus 120 have a plurality of contact surfaces through which data is transmitted in a contact manner, and the size of the contact surfaces is related to the compressive stress of the conductive elements 130 and the side design of the first torus 110, when the stress is large, the area of the contact surfaces is large, the contact surface is more tightly attached to the second torus 120, and when the stress is small, the area of the contact surfaces is small, and the attachment of the contact surfaces to the second torus 120 is looser.

In the communication process, due to the fact that the slip ring and the external communication device are provided with the plurality of contact surfaces, data can be transmitted through one contact point, the plurality of contact surfaces are provided with the plurality of points, when one conductive part fails or has an error, other conductive parts can continue to transmit the data, the work of the external device is not affected, and the reliability and the accuracy of data transmission are guaranteed. In the slip ring, the conductive parts are abraded due to the inevitable friction of contact sliding transmission data, but the conductive parts are subjected to data transmission by adopting a plurality of large contact surfaces, so that the smoothness and reliability of data transmission are ensured, and the conductive parts can adopt small stress.

Fig. 2 shows the structure of a mechanical lidar. The mechanical laser radar comprises a rotor and a stator, wherein the interior of the rotor is separated into a transmitting cavity and a receiving cavity. FIG. 2 is a schematic diagram of the mechanical lidar of the present invention, as shown in FIG. 1; a carrier 1 for carrying a plurality of lasers; the carrier is arranged in the emission cavity 8; a plurality of lasers 11, the specific number corresponding to the number of lines of the laser radar; the laser is fixed on the bearing body from top to bottom; an optical collimating device 2, such as a collimating lens, wherein the projection points of the lasers on the carrier on a vertical plane including the main axis of the optical collimating device are uniform or distributed sparsely and densely through a reflecting mirror 61; the detection light emitted by the laser passes through the light collimating device and then irradiates an external object 3, such as the ground, a pedestrian, a bicycle, a bus stop board, an automobile and the like; the light collimating device is disposed within the emission cavity; a light receiving device 4, such as a focusing lens (group), through which the reflected light of the detection light on the external object passes and is received by the detector 51 via a mirror 64 (disposed on the receiving circuit board 5); detectors 51, the number of the detectors is the same as that of the lasers, and the detectors and the lasers are symmetrically arranged about a middle vertical plane of a central connecting line of the light collimation device and the light receiving device; the probe is disposed within the receiving cavity. The working process of the multi-line laser radar is as follows: the multiple lasers emit multiple beams of laser, such as No. 1 laser, and the detection light is collimated by the light collimating device and then emitted to an external object, wherein the density of the central laser beams (horizontal and near horizontal) is high, and the vertical angular resolution is improved; the reflected light of the detection light on the external object is converged on the detector through the light receiving device, for example, the detection light emitted by the No. 1 laser is converged on the No. 1 detector after being reflected by the external object and passing through the receiving device; the analysis device processes the electrical signal transmitted by the detector to detect an external object, such as an obstacle. Where 91 is an isolation device that isolates the transmit chamber from the receive chamber.

Fig. 3 is a structural diagram of a scanning apparatus in a mechanical lidar, the scanning apparatus including: a central shaft 92 having a recess therein; the top end of the middle shaft is fixed on the fixed seat 97; for example, the fixed seat is a circular groove with a bulge at the center, and the top end of the thinner part is fixed on the bulge; a motor 94, which is arranged at the lower part of the fixed seat and is adjacent to the fixed seat, and the stator of the motor is sleeved at the outer edge of the upper part of the middle shaft between the fixed seat and the base, such as the outer edge of the thinner part; a rotor of the motor rotates around the middle shaft, and a power line of the motor is laid in the groove; the bottom end of the rotor is connected with a rotating cavity through the coupler 95, so that the rotor drives the rotating cavity to rotate around the middle shaft; a rotating cavity 96 fixed by a bearing at the outer edge of the middle shaft at the lower part of the stator, such as the outer edge of the transition part, and distributed at the lower part of the motor and the periphery of the motor along the radial direction of the middle shaft, but not at the upper part of the motor; the interior of the rotating cavity is separated into a transmitting cavity and a receiving cavity; and the bottom end of the middle shaft is fixed on the base 92, if the base is a circular groove with a bulge at the center, the thicker part is fixed on the bulge of the base.

Fig. 4 and 5 show schematic views of the installation structure of the slip ring and the lidar. Referring to fig. 4 and 5, since the lidar rotor has a driving element, a measuring element and a control element, and control signals need to be transmitted from a power supply to the lidar rotor through a stator, a conductive device needs to be installed on the lidar, the conductive device is a slip ring, and is generally installed around a central axis (as shown in fig. 5) of the lidar, and the conductive device mainly comprises two major parts, namely a rotating part and a stationary part, which are relative, for example, a first circular ring body and a second circular ring body, which are relative to each other, wherein the first circular ring body can be connected with a stator part of the radar or a rotor part of the radar.

For the purposes of the description of the embodiments, it is assumed that the first torus is stationary (slip ring assembly stator) and the second torus rotates (slip ring assembly rotor). The rotor of laser radar and rotary motion thereupon are connected to the second tourus to the rotor part of access laser radar is drawn forth from it to the rotating part in the sliding ring, i.e. the wire of second tourus, and laser radar's stator is connected to first tourus, and the wire of static part in the sliding ring, i.e. first tourus is drawn forth from it, external power supply. The contact between the slip ring and the lidar, i.e. the plurality of electrically conductive parts of the slip ring, is a function of electrical energy and signal transmission. And the slip ring can transmit signals required by the laser radar, such as electric energy or electric signals and the like, through the relative motion of the first circular ring body and the second circular ring body. Electrical performance metrics for slip rings may include: insulation resistance, contact resistance, dielectric strength, and crosstalk.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

While embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and that changes, modifications and variations may be made therein by those of ordinary skill in the art within the scope of the present invention.