Rotary distance measuring device

Abstract

The utility model discloses a rotary distance measuring device, comprising a pedestal which is provided with a driving mechanism; the signal transmitting module and the signal receiving module are fixedly arranged relative to the base; the rotating module comprises a module main body and a light guide assembly arranged on the module main body, and the light guide assembly is arranged to be capable of reflecting the measuring light emitted by the signal emitting module to a measured object and reflecting the measuring light reflected by the measured object to the signal receiving module; a transmission part is integrally arranged on the module main body, the transmission part is in transmission connection with the driving mechanism to drive the rotating module to rotate relative to the base, the rotating module is used for installing a light guide assembly to form a measuring light path on one hand, and the module main body serves as a part of the transmission mechanism on the other hand; therefore, the number of parts of the transmission mechanism is reduced, and the assembly process, the product weight and the cost of the rotary distance measuring device can be effectively simplified.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent cleaning equipment, and in particular to a rotary distance measuring device. Background Art

[0002] In recent years, with the continuous development of artificial intelligence, robotics and sensor technology, cleaning robots have become more and more intelligent and functional. Among them, LiDAR technology has played an important role in promoting the development of cleaning robots.

[0003] LiDAR is an active remote sensing technology that determines the distance of a target by emitting laser pulses and measuring the time it takes for the reflected light to return to the sensor. LiDAR can provide high-precision, real-time three-dimensional information about the surrounding environment, making it ideal for environmental perception and navigation of cleaning robots.

[0004] However, since the laser radar needs to rotate during operation, its structure not only includes a complex optical path structure but also a rotational drive and transmission structure. The integration of the above structures leads to problems such as complex structure of the laser radar system, complex assembly process, large size, bulky equipment, and high cost. Utility Model Content

[0005] The purpose of the embodiments of the present utility model is to provide a rotary distance measuring device, which can solve the above-mentioned problems existing in the prior art.

[0006] To achieve the above objectives, this application adopts the following technical solutions:

[0007] In one aspect, a rotary distance measuring device is provided, comprising:

[0008] A base, on which a driving mechanism is disposed;

[0009] A signal transmitting module and a signal receiving module are fixedly arranged relative to the base;

[0010] A rotating module, comprising a module body and a light guide component arranged on the module body, wherein the light guide component is arranged to be able to reflect the measuring light emitted by the signal transmitting module to the object to be measured, and to be able to reflect the measuring light reflected by the object to be measured to the signal receiving module;

[0011] The module body is integrally provided with a transmission part, and the transmission part is transmission-connected with the driving mechanism to drive the rotating module to rotate relative to the base.

[0012] Optionally, the light guide assembly includes a first reflector and a second reflector, and the first reflector and the second reflector are symmetrically arranged along a horizontal plane; the first reflector is configured to reflect the measuring light emitted by the signal transmitting module in a horizontal direction to the outside of the rotating module so as to be blocked and reflected by the object to be measured; the second reflector is configured to reflect the measuring light reflected by the object to be measured in a vertical direction to the signal receiving module.

[0013] Optionally, the module body includes a first mounting platform and a second mounting platform, the first reflector is arranged on the first mounting platform, and the second reflector is located between the first mounting platform and the second mounting platform.

[0014] Optionally, a light-through hole is further arranged between the first mounting platform and the second mounting platform, and the second reflector is arranged corresponding to the light-through hole.

[0015] Optionally, a mounting hole is provided at the center of the second mounting platform, the second reflector is installed in the mounting hole, and the signal receiving module is arranged at a position on the base corresponding to the mounting hole.

[0016] Optionally, a first rotating boss is provided on the surface of the second mounting platform facing the base, a second rotating boss is provided on the base corresponding to the first rotating boss, and the rotating module is rotatably mounted on the base through the cooperation between the first rotating boss and the second rotating boss.

[0017] Optionally, a periphery of the second mounting platform extends toward the signal receiving module to form an extending edge, and the transmission portion is formed at a periphery of the extending edge.

[0018] Optionally, a portion of the extended edge away from the second mounting platform forms an angle detection area, the angle detection area is provided with a plurality of notches, and a photoelectric encoder is provided on the base corresponding to the angle detection area.

[0019] Optionally, a control circuit board is provided on a surface of a side of the base away from the rotating module, the signal receiving module or the signal transmitting module is provided on the control circuit board, a through hole is provided on the base, and the signal receiving module or the signal transmitting module is arranged toward the second reflector through the through hole.

[0020] Optionally, a light-transmitting cover is further included, wherein the light-transmitting cover is arranged outside the rotating module, and the signal receiving and transmitting module or the signal transmitting module is installed on the top of the light-transmitting cover.

[0021] Optionally, a lens is further arranged between the signal transmitting module and the first reflector, and / or between the signal receiving module and the second reflector.

[0022] The beneficial effects of the present application are as follows: the rotating module in the present application is used, on the one hand, to install the light guide assembly to form a measuring light path, and on the other hand, the module body thereof serves as a part of the transmission mechanism, thereby reducing the number of components of the transmission mechanism, thereby effectively simplifying the assembly process, product weight and cost of the rotating distance measuring device. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present application is further described in detail below based on the drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the rotary distance measuring device described in an embodiment of the present application;

[0025] Figure 2 A cross-sectional view of the rotary distance measuring device described in an embodiment of the present application;

[0026] Figure 3 for Figure 2 The local enlarged view of point I in the middle;

[0027] Figure 4 for Figure 2 A partial enlarged view of position II in the middle;

[0028] Figure 5 A schematic diagram of a rotation distance measuring device according to an embodiment of the present application in a decomposed state from a viewing angle;

[0029] Figure 6 A schematic diagram of another viewing angle decomposition state of the rotary distance measuring device according to an embodiment of the present application;

[0030] Figure 7 for Figure 6 A partial enlarged view of point III in the middle;

[0031] Figure 8 A schematic diagram of another viewing angle decomposition state of the rotary distance measuring device according to an embodiment of the present application;

[0032] Fig. 9 A bottom view of the rotary distance measuring device according to an embodiment of the present application;

[0033] Fig.10 A schematic diagram of the disassembled state of the rotating module and the driving mechanism for implementing the present application;

[0034] Fig.11 A schematic diagram of the decomposed state of the rotating module and the driving mechanism in another perspective for implementing the present application;

[0035] Fig.12This is a schematic diagram of the three-dimensional structure of the rotating module according to the embodiment of the present application;

[0036] Fig.13 This is a schematic diagram of the three-dimensional structure of the rotating module described in the embodiment of the present application from another perspective;

[0037] Fig.14 This is a schematic diagram of the three-dimensional structure of the base described in the embodiment of the present application.

[0038] In the figure:

[0039] 100, base; 110, rotating module; 111, module body; 112, first mounting platform; 113, second mounting platform; 114, connecting rib; 115, first mounting boss; 116, second mounting boss; 117, support plate; 118, mounting groove; 119, support surface; 120, limiting boss; 121, reinforcement plate; 122, light hole; 123, mounting hole; 124, first rotating boss; 12 5. Second rotating boss; 126. Bearing; 127. Extended edge; 128. Belt groove; 129. Notch; 130. Through hole; 131. Driving mechanism; 200. Signal transmitting module; 300. Signal receiving module; 400. First reflector; 500. Second reflector; 600. Transparent cover; 610. Mounting sleeve; 620. FPC; 700. Lens; 800. Photoelectric encoder; 900. Control circuit board. DETAILED DESCRIPTION

[0040] In order to make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved more clearly, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0041] In the description of this application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0042] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] like Figure 1-14 As shown, the embodiment of the present application provides a rotation distance measuring device, comprising:

[0044] A base 100 on which a driving mechanism 131 is disposed;

[0045] The signal transmitting module 200 and the signal receiving module 300 are fixedly arranged relative to the base 100;

[0046] The rotating module 110 includes a module body 111 and a light guide component disposed on the module body 111, wherein the light guide component is configured to reflect the measurement light emitted by the signal transmitting module 200 to the object under test, and to reflect the measurement light reflected by the object under test to the signal receiving module 300;

[0047] The module body 111 is integrally provided with a transmission part, and the transmission part is in transmission connection with the driving mechanism 131 to drive the rotating module 110 to rotate relative to the base 100 .

[0048] In the present application, the rotating module 110 is used to install the light guide component to form a measuring light path. On the other hand, the module body thereof serves as a part of the transmission mechanism, thereby reducing the number of components of the transmission mechanism, thereby effectively simplifying the assembly process, product weight and cost of the rotating distance measuring device.

[0049] Specifically, refer to Figure 10-13 As shown, the module body 111 in the embodiment of the present application is a rotating body structure, and the transmission part is a belt groove 128 arranged on its periphery.

[0050] When the transmission part is a belt groove 128, the driving mechanism 131 includes a driving motor and a driving pulley fixedly connected to the power output shaft of the driving motor. The transmission belt is sleeved in the driving pulley and the belt groove 128 of the module body 111. The driving pulley and the module body 111 are connected by the transmission belt transmission, and the module body 111 is directly driven to rotate.

[0051] The driving mechanism 131 in the embodiment of the present application is preferably a brushed motor.

[0052] It should be pointed out that the above-mentioned transmission part being the belt groove 128 is not a limitation of the present application. In other embodiments, transmission teeth can also be used as the transmission part, and the transmission teeth adopt a structure directly processed on the side wall of the module body 111, which can also reduce the number of transmission parts. Transmission is achieved by meshing with the driving gear fixedly installed on the power output shaft of the drive motor, thereby driving the module body 111 to rotate.

[0053] In this embodiment, an example is given in which the rotating distance measuring device is placed on a horizontal plane for use. In this state, the base 100 is located at the bottom, the rotating module 110 is arranged on the base 100 and can rotate around a vertical rotation axis, and the signal transmitting module 200 and the signal receiving module 300 are both arranged on the axis of the rotating shaft and are located on both sides of the rotating module 110.

[0054] In some embodiments, the signal transmitting module 200 is disposed above the rotating module 110, and the signal receiving module 300 is disposed below the rotating module 110. In other embodiments, the signal transmitting module 200 may be disposed below the rotating module 110, and the signal receiving module 300 may be disposed above the rotating module 110.

[0055] This embodiment is described by taking the signal transmitting module 200 as being disposed above the rotating module 110 and the signal receiving module 300 as being disposed below the rotating module 110 as an example. Figure 4-7 As shown, the light guide assembly includes a first reflector 400 and a second reflector 500, and the first reflector 400 and the second reflector 500 are symmetrically arranged along a horizontal plane; the first reflector 400 is configured to reflect the measuring light emitted by the signal transmitting module 200 in a horizontal direction to the outside of the rotating module 110 so as to be blocked and reflected by the object to be measured; the second reflector 500 is configured to reflect the measuring light reflected by the object to be measured in a vertical direction to the signal receiving module 300.

[0056] The following is combined with Figure 4-13 The specific structure of a rotating module 110 is specifically introduced. The module body 111 includes a first mounting platform 112 and a second mounting platform 113 in an integrated structure. The first mounting platform 112 and the second mounting platform 113 are connected by a plurality of connecting ribs 114. The first reflector 400 is arranged on the first mounting platform 112 and is located on the side of the first mounting platform 112 facing the signal transmitting module 200. The second reflector 500 is located between the first mounting platform 112 and the second mounting platform 113.

[0057] A first mounting boss 115 is provided on the side of the first mounting platform 112 facing the signal transmitting module 200, and a second mounting boss 116 is provided on the side of the first mounting platform 112 facing the signal receiving module 300. In the embodiment of the present application, the first mounting boss 115 and the second mounting boss 116 have the same structure, and both include two support plates 117 arranged at intervals from each other. The two support plates 117 respectively have mounting grooves 118, and the bottom of the mounting groove 118 is a supporting surface 119 that matches the mounting inclination angle of the first reflector 400 and the second reflector 500. The supporting surface 119 extends to a position connected to the module body 111 to provide a limiting boss 120. The first reflector 400 and the second reflector 500 are both arranged in a supporting space composed of the mounting groove 118 and the limiting boss 120.

[0058] In order to further support the first reflector 400 and the second reflector 500, in an embodiment of the present application, a reinforcement plate 121 is further arranged between the two support plates 117, and the surface of the reinforcement plate 121 facing the first reflector 400 or the second reflector 500 also forms a support surface 119, and the support surface 119 is in the same plane as the support surface 119 formed by the bottom of the mounting groove 118, and a limiting boss 120 is also arranged at the position where the support surface 119 extends to connect with the module body 111.

[0059] Furthermore, a light hole 122 is provided between the first mounting platform 112 and the second mounting platform 113 , the axial direction of the light hole 122 is in the horizontal direction, and the second reflector 500 is provided corresponding to the light hole 122 , and the measuring light reflected by the object to be measured can pass through the light hole 122 to irradiate the second reflector 500 .

[0060] The monitoring plane of the distance measuring device in the present application is a plane perpendicular to the rotation axis of the rotating module 110. To realize the optical path setting in this direction, the measuring light emitted by the signal transmitting module 200 in this embodiment is in the vertical direction, that is, parallel to the rotation axis of the rotating module 110. The reflecting surface of the first reflector 400 is tilted upward at an angle of 45° relative to the horizontal plane. The first reflector 400 can reflect the measuring light propagating in the vertical direction and transform it into horizontal propagation. Similarly, the reflecting surface of the second reflector 500 is tilted downward at an angle of 45° relative to the horizontal plane. The measuring light reflected by the measured object can be transformed from horizontal propagation to vertical propagation through the second reflector 500, and then transmitted to the signal receiving module 300. Figure 8As shown, in order to ensure that when the rotating module 110 rotates to any angle around the rotating axis, the first reflector 400 can receive the detection light emitted by the signal transmitting module 200 and reflect the detection light in the horizontal direction, and the second reflector 500 can receive the detection light reflected from the object to be measured and reflect the detection light to the signal receiving module 300, in the embodiment of the present application, the first reflector 400 and the second reflector 500 are located on the rotation center line of the rotating module 110.

[0061] Reference Fig.13 As shown, a mounting hole 123 is provided at the center of the second mounting platform 113, the second reflector 500 is installed in the mounting hole 123, and the signal receiving module 300 is provided at a position on the base 100 corresponding to the mounting hole 123. By providing the mounting hole 123, the position where the second reflector 500 is installed can be connected to the position where the signal receiving module 300 is installed without any obstruction in between, so as to measure the transmission of light.

[0062] The embodiment of the present application also provides a rotating connection structure between the rotating module 110 and the base 100, referring to Figure 4 As shown, a first rotating boss 124 is provided on the surface of the second mounting platform 113 facing the base 100, and a second rotating boss 125 is provided on the base 100 corresponding to the first rotating boss 124, and the rotating module 110 can be rotatably mounted on the base 100 through the cooperation between the first rotating boss 124 and the second rotating boss 125.

[0063] Further, see Figure 4 As shown, the first rotating boss 124 and the second rotating boss 125 are both annular structures, the inner diameter of the first rotating boss 124 is larger than the outer diameter of the second rotating boss 125, the first rotating boss 124 and the second rotating boss 125 are concentrically sleeved on the outside of the second rotating boss 125, and a bearing 126 is arranged between the first rotating boss 124 and the second rotating boss 125, the first rotating boss 124 and the outer ring of the bearing 126 are interference fit, and the second rotating boss 125 and the inner ring of the bearing 126 are interference fit.

[0064] It can be understood that the fact that the inner diameter of the first rotating boss 124 is larger than the outer diameter of the second rotating boss 125 does not serve as a limitation to the present application. In other embodiments, the inner diameter of the second rotating boss 125 can also be larger than the outer diameter of the first rotating boss 124, and the second rotating boss 125 is concentrically mounted on the outside of the first rotating boss 124 with the first rotating boss 124, and the first rotating boss 124 has an interference fit with the inner ring of the bearing 126, and the second rotating boss 125 has an interference fit with the outer ring of the bearing 126.

[0065] The present application provides a specific transmission part configuration form, referring to Fig.11 As shown, the periphery of the second mounting platform 113 extends toward the direction of the signal receiving module 300 to form an extending edge 127 , and the transmission portion is formed at the periphery of the extending edge 127 .

[0066] Furthermore, the extended edge 127 of the module body 111 in the embodiment of the present application also has other functions, see Figure 12-13 As shown, the portion of the extended edge 127 away from the second mounting platform forms an angle detection area, and the angle detection area is provided with a plurality of notches 129. A photoelectric encoder 800 is provided on the base 100 corresponding to the angle detection area. A partial area of ​​the extended edge 127 forms an angle detection area, and a plurality of notches 129 are provided thereon, so that it can be used as a code disk, and cooperates with the photoelectric encoder 800 to form a rotary encoder, thereby providing a reference basis for the control of the rotary distance measuring device.

[0067] In the embodiment of the present application, a control circuit board 900 is disposed on a surface of the base 100 away from the rotating module 110. Fig.14 As shown, the signal receiving module 300 or the signal transmitting module 200 is arranged on the control circuit board 900, and a through hole 130 is arranged on the base 100. The signal receiving module 300 or the signal transmitting module 200 is arranged toward the second reflector 500 through the through hole 130. The photoelectric encoder 800 is also arranged on the control circuit board 900, and a through hole 130 is arranged on the base 100. The photoelectric encoder 800 extends through the through hole 130 to the top of the base 100, and cooperates with the angle monitoring area to realize angle detection.

[0068] Reference Figure 1-7As shown, the embodiment of the present application also includes a light-transmitting cover 600, and the light-transmitting cover 600 is covered on the outside of the rotating module 110. During operation, the rotating module 110 rotates inside the light-transmitting cover 600, and the measuring light passes through the inside of the light-transmitting cover 600 and propagates to the object to be measured. The measuring light reflected by the object to be measured is irradiated onto the second reflector 500 through the light-transmitting cover 600, and the signal receiving and transmitting module is installed on the top of the light-transmitting cover 600.

[0069] It should be noted that, when the signal receiving module 300 is located at the top, the signal receiving module 300 can also be installed on the top of the light-transmitting cover 600 .

[0070] Specifically, refer to Figure 5-8 As shown, the light-transmitting cover 600 is provided with an opening on the top, a mounting sleeve 610 is provided at the opening, and the signal transmitting module 200 is provided on the top of the mounting sleeve 610 .

[0071] In the embodiment of the present application, the signal transmitting module 200 or the signal receiving module 300 located at the top of the light-transmitting cover 600 is communicatively connected with the PCB at the bottom of the base 100 through the FPC 620. The light-transmitting cover 600 is provided with a wire groove capable of accommodating the FPC 620, and the base 100 is provided with a wire hole capable of allowing the FPC 620 to pass through. By using the FPC 620 to connect the signal transmitting module 200 or the signal receiving module 300 at the top with the PCB at the bottom of the base 100, the number of PCBs can be reduced and the cost can be saved.

[0072] Furthermore, the embodiment of the present application also includes a plurality of lenses 700 , and the lenses 700 may be disposed between the signal transmitting module 200 and the first reflector 400 , and / or between the signal receiving module 300 and the second reflector 500 .

[0073] Specifically, the lens 700 can be a collimating lens, a focusing lens, a shaping lens or a calibration lens, wherein: the collimating lens is usually located after the signal transmitting module 200, and is used to collimate the measuring beam into a parallel beam. The focal length of the collimating lens is usually long, and the measuring beam can be collimated to a very small divergence angle; the focusing lens is usually arranged close to the signal receiving module 300, and is used to focus the measuring beam onto a small spot so that the signal receiving device can obtain it. The focal length of the focusing lens is usually short, and the measuring beam can be focused to a very small spot size. The shaping lens is usually used to shape the measuring beam into a specific shape. According to actual needs, the shape of the shaping lens can be spherical, aspherical, cylindrical, etc. The calibration lens is usually used to correct errors in the optical path. The type and number of calibration lenses can be selected according to the specific situation.

[0074] In the embodiment of the present application, the above-mentioned lens 700 and the combination of the above-mentioned lenses 700 can be selected according to actual needs, and the lens 700 can be arranged between the signal transmitting module 200 and the first reflector 400, between the first reflector 400 and the object to be measured, between the object to be measured and the second reflector 500, and between the second reflector 500 and the signal receiving module 300 as needed. The specific arrangement method and combination function are common knowledge of those skilled in the art and are not described in detail in the present application.

[0075] The rotary distance measuring device described in the embodiment of the present application can be applied to a cleaning robot. Generally, a cleaning robot includes a body, walking wheels, universal wheels, a drive motor, a side brush, a dust collecting motor, a dust collecting box, a sensor, a microprocessor, a battery and other structures, wherein the rotary distance measuring device is arranged on the top of the body to provide assistance for the walking path planning of the cleaning robot. The cleaning robot using the above-mentioned rotary distance measuring device has reduced product complexity and production cost, and has good production convenience and economic benefits.

[0076] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and other directions or positional relationships are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of this application. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0077] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0078] In addition, it should be understood that although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0079] The technical principles of the present application are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the present application without creative work, and these methods will fall within the scope of protection of the present application.

Claims

1. A rotary distance measuring device, characterized in that: include: A base (100) on which a driving mechanism (131) is disposed; A signal transmitting module (200) and a signal receiving module (300) are fixedly arranged relative to the base (100); A rotating module (110), comprising a module body (111) and a light guide component arranged on the module body (111), wherein the light guide component is arranged to be capable of reflecting the measuring light emitted by the signal transmitting module (200) to the object to be measured, and capable of reflecting the measuring light reflected by the object to be measured to the signal receiving module (300); A transmission part is integrally provided on the module body (111), and the transmission part is in transmission connection with the driving mechanism (131) to drive the rotating module (110) to rotate relative to the base (100).

2. The rotary distance measuring device according to claim 1, characterized in that: The light guide assembly comprises a first reflector (400) and a second reflector (500), wherein the first reflector (400) and the second reflector (500) are symmetrically arranged along a horizontal plane; the first reflector (400) is arranged to reflect the measurement light emitted by the signal transmitting module (200) to the outside of the rotating module (110) in a horizontal direction so as to be blocked and reflected by the object to be measured; and the second reflector (500) is arranged to reflect the measurement light reflected by the object to be measured to the signal receiving module (300) in a vertical direction.

3. The rotary distance measuring device according to claim 2, characterized in that: The module body (111) comprises a first mounting platform (112) and a second mounting platform (113); the first reflector (400) is arranged on the first mounting platform (112); and the second reflector (500) is located between the first mounting platform (112) and the second mounting platform (113).

4. The rotary distance measuring device according to claim 3, characterized in that: A light-through hole (122) is also provided between the first mounting platform (112) and the second mounting platform (113), and the second reflector (500) is provided corresponding to the light-through hole (122).

5. The rotary distance measuring device according to claim 3, characterized in that: A mounting hole (123) is provided at the center of the second mounting platform (113), the second reflector (500) is installed in the mounting hole (123), and the signal receiving module (300) is arranged at a position on the base (100) corresponding to the mounting hole (123).

6. The rotary distance measuring device according to claim 3, characterized in that: A first rotating boss (124) is arranged on the surface of the second mounting platform (113) facing the base (100), and a second rotating boss (125) is arranged on the base (100) corresponding to the first rotating boss (124). The rotating module (110) can be rotatably mounted on the base (100) by cooperating with the first rotating boss (124) and the second rotating boss (125).

7. The rotary distance measuring device according to claim 3, characterized in that: The periphery of the second mounting platform (113) extends in the direction of the signal receiving module (300) to form an extended edge (127), and the transmission part is formed on the periphery of the extended edge (127).

8. The rotary distance measuring device according to claim 7, characterized in that: The portion of the extended edge (127) away from the second mounting platform (113) forms an angle detection area, the angle detection area is provided with a plurality of notches (129), and a photoelectric encoder (800) is provided on the base (100) corresponding to the angle detection area.

9. The rotary distance measuring device according to claim 2, characterized in that: A control circuit board (900) is arranged on a surface of a side of the base (100) away from the rotating module (110); the signal receiving module (300) or the signal transmitting module (200) is arranged on the control circuit board (900); a through hole (130) is arranged on the base (100); and the signal receiving module (300) or the signal transmitting module (200) is arranged toward the second reflector (500) through the through hole (130).

10. The rotary distance measuring device according to claim 9, characterized in that: The invention also comprises a light-transmitting cover (600), wherein the light-transmitting cover (600) is arranged outside the rotating module (110), and the signal transmitting module (200) or the signal transmitting module (200) is installed on the top of the light-transmitting cover (600); a lens (700) is also arranged between the signal transmitting module (200) and the first reflector (400), and / or between the signal receiving module (300) and the second reflector (500).

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