Signal transmitting device and positioning system

Abstract

The utility model belongs to the technical field of radio frequency positioning, and particularly discloses a signal transmitting device and a positioning system.The signal transmitting device comprises a reader-writer which comprises a signal transmitting end used for transmitting control signals; the multi-beam plane lens comprises a plurality of input ports and a plurality of output ports, and the plurality of input ports and the plurality of output ports are in one-to-one correspondence; the switcher is electrically connected with the signal transmitting end and is selectively and electrically connected with any one of the plurality of input ports; and the antenna assembly is electrically connected with the plurality of output ports, and the antenna assembly is used for transmitting a first wave beam. According to the signal transmitting device and the positioning system provided by the invention, the technical problem that an ultrahigh-frequency array antenna in the prior art needs a complex calculation process to control the antenna to position the electronic tag, and the cost is relatively high can be solved.

Description

Technical Field

[0001] The present application belongs to the field of radio frequency positioning technology, and specifically relates to a signal transmitting device and a positioning system. Background Art

[0002] Ultra-high frequency (UHF) RFID (Radio Frequency Identification) technology is currently one of the mainstream RFID technologies. Due to its high frequency and short wavelength, it offers higher recognition accuracy and smaller antenna size than high-frequency RFID technology, making it suitable for integration into scenarios such as smart access control, tunnel machines, and access control systems. It enables rapid multi-tag recognition, improving the efficiency of item identification and inventory management. Currently, UHF RFID technology is primarily used in retail, warehousing, and logistics scenarios for the rapid identification of single or multiple tags on items.

[0003] The existing UHF RFID single-antenna structure uses the signal output by the UHF RFID reader to generate a radiation beam from the single UHF RFID antenna. Because this single-antenna structure produces a quasi-omnidirectional radiation beam with a large beam range and cannot form a focusing effect in the near field, the single antenna structure cannot accurately capture the subtle changes caused by differences in the return signal when the electronic tag passes through the identification area. The existing UHF RFID antenna array structure can generate multiple near-field focused radiation beams with a large beam scanning range, and a single beam can form a focusing effect. Therefore, when the electronic tag passes through the identification area, the UHF RFID antenna array structure can accurately capture the spatial position of the electronic tag; however, the UHF array antenna requires a complex calculation process to control the antenna, which is relatively costly. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a signal transmitting device and a positioning system to solve the technical problem in the prior art that ultra-high frequency array antennas require a complex calculation process to control the antenna positioning of electronic tags, which is costly.

[0005] To achieve the above-mentioned objectives, in a first aspect, an embodiment of the present application provides a signal transmitting device, comprising: a reader / writer, comprising a signal transmitting end for transmitting a control signal; a multi-beam planar lens, wherein the multi-beam planar lens comprises multiple input ports and multiple output ports, and the multiple input ports correspond one to one to the multiple output ports; a switch, electrically connected to the signal transmitting end, and selectively electrically connected to any one of the multiple input ports; an antenna assembly, electrically connected to the multiple output ports, and the antenna assembly is used to transmit a first beam.

[0006] In some embodiments, the switch includes a single-pole multi-throw RF switch, which includes a first pin, multiple second pins and a switching unit; the first pin is electrically connected to the reader; one second pin is electrically connected to one of the input ports; the switching unit is electrically connected to the first pin and can be selectively electrically connected to any one of the multiple second pins.

[0007] In some embodiments, the signal transmitting device includes a controller, which is electrically connected to the switching unit and is used to control the action of the switching unit.

[0008] In some embodiments, the signal transmitting device includes a reader / writer assembly, and the reader / writer assembly includes the reader / writer and at least one of the multi-beam planar lens and the switch.

[0009] In some embodiments, the antenna assembly includes a multi-port single antenna having a plurality of connection ports, and one of the connection ports is electrically connected to one of the output ports.

[0010] In some embodiments, the multi-port single antenna includes a plurality of antenna elements, one of the antenna elements is electrically connected to one of the connection ports, and the plurality of antenna elements are distributed along a scanning direction of the first beam.

[0011] In some embodiments, the multi-beam planar lens comprises a planar Luneburg lens or a Rotman lens.

[0012] In a second aspect, an embodiment of the present application further provides a positioning system, comprising a signal transmitting device as described in any one of the embodiments of the first aspect, and also comprising an electronic tag, wherein the electronic tag is used to receive a first beam transmitted by the antenna assembly and transmit a second beam to the antenna assembly.

[0013] In some embodiments, the positioning system includes an identification area, and the antenna assembly is configured to cyclically transmit the first beam along different directions within the identification area to cover the identification area.

[0014] In some embodiments, the identification area is spaced apart from the signal transmitting device, and the scanning direction of the first beam is a direction perpendicular to the spacing direction between the identification area and the signal transmitting device.

[0015] The beneficial effects of the signal transmitting device and positioning system provided by the present application are as follows: the switch can electrically connect the signal transmitting end of the reader to different input ports of the multi-beam planar lens, so that the multi-beam planar lens can adjust the control signal to different directions. The antenna assembly is electrically connected to multiple output ports, and the antenna assembly can transmit first beams in different directions to cover different areas according to control signals in different directions. Compared with the ultra-high frequency array antenna, the signal transmitting device provided by the present application controls the first beam to change direction according to a preset coverage area through a switch, and the method of controlling the antenna to locate the electronic tag is simple, easy to manufacture, and can reduce costs. Therefore, it can solve the technical problem in the prior art that the ultra-high frequency array antenna needs to use a complex calculation process to control the antenna to locate the electronic tag, which is relatively expensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0017] Figure 1 Schematic diagram of a signal transmitting device provided in some embodiments of the present application Figure 1 ;

[0018] Figure 2 Schematic diagram of a signal transmitting device provided in some embodiments of the present application Figure 2 ;

[0019] Figure 3 A schematic diagram of a positioning system provided for some embodiments of the present application.

[0020] Among them, the reference numerals in the figures are:

[0021] 1000, positioning system;

[0022] 100. Signal transmitter;

[0023] 10. Reader / writer assembly; 11. Reader / writer; 111. Signal transmitter; 12. Switch; 121. First pin; 122. Second pin; 123. Switch unit; 13. Multi-beam flat lens; 131. Input port; 132. Output port;

[0024] 20. Antenna assembly; 21. Connection port; 22. Antenna vibrator;

[0025] 30. First beam;

[0026] 40. RF cables;

[0027] 200, electronic tags;

[0028] 300. Identify the area. DETAILED DESCRIPTION

[0029] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0030] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0031] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0033] Positioning systems are used to locate electronic tags and the people or objects carrying them. They can be used in scenarios such as smart access control, tunnel machines, and access control systems. They can also locate the location and trajectory of goods in retail, warehousing, and logistics. Signal transmitters are used to transmit and receive electromagnetic waves. They can both emit electromagnetic waves to identify electronic tags within the positioning system and receive electromagnetic waves emitted by electronic tags.

[0034] An existing positioning system primarily uses an RFID reader to output a control signal, which a single RFID antenna generates in response to. This radiation beam has a wide coverage area, identifying RFID tags within that range. The tags then transmit corresponding information via the antenna to the RFID reader. The signal transmitter in this positioning system, due to its single antenna structure, generates a quasi-omnidirectional radiation beam. This beam covers a large recognition area and lacks a focusing effect in the near field. As a result, the RFID reader cannot accurately detect subtle variations in the return signal as the tag passes through the recognition area.

[0035] Another existing positioning system mainly uses the control signal output by the UHF RFID reader, and the UHF RFID array antenna generates multiple radiation beams. The overall scanning coverage of these multiple radiation beams is large, and a single beam is focused in the near field to identify the RFID electronic tag and return the corresponding tag information. This array antenna structure will produce multiple near-field focused radiation beams with a large beam scanning range. A single beam can form a focusing effect. When the electronic tag passes through the identification area, the spatial position of the electronic tag can be accurately collected due to the scanning of multiple beams. UHF array antennas often use phased array antennas to achieve near-field focusing of the beam. Each antenna needs to be controlled separately. The design of the scanning direction of multiple beams is relatively complex and costly.

[0036] To achieve the above objectives, in the first aspect, the present application provides a signal transmitting device, please refer to Figure 1 The signal transmitting device 100 includes a reader / writer 11 and an antenna assembly 20. The reader / writer 11 includes a signal transmitting terminal 111 for transmitting a control signal. The antenna assembly 20 is electrically connected to the reader / writer 11. The antenna assembly 20 can receive the control signal transmitted by the signal transmitting terminal 111, and the antenna assembly 20 can transmit the first beam 30 according to the control signal.

[0037] It is understood that the control signal transmitted by the reader 11 is a radio frequency signal, which can control the antenna assembly 20 to transmit a specific beam. Optionally, the reader 11 transmits an ultra-high frequency control signal for ultra-high frequency radio frequency positioning.

[0038] The first beam 30 can activate the electronic tag 200, causing it to emit a second beam (return signal). The antenna assembly 20 can also receive the second beam and transmit it to the reader 11. The reader 11 can also locate the electronic tag 200 based on the second beam.

[0039] The signal transmitting device 100 provided in the embodiment of the present application further includes a multi-beam planar lens 13 and a switch 12. The multi-beam planar lens 13 includes multiple input ports 131 and multiple output ports 132. The multiple input ports 131 correspond to the multiple output ports 132 in a one-to-one manner. The multiple output ports 132 are electrically connected to the antenna assembly 20. The switch 12 is electrically connected to the signal transmitting terminal 111 and can be selectively electrically connected to any of the multiple input ports 131.

[0040] It is understood that the switch 12 can be selectively electrically connected to the input port 131, that is, it can selectively control the signal transmitting end 111 to be electrically connected to a specific input port 131, so that the control signal is transmitted to the specific input port 131. Optionally, the switch 12 is electrically connected to the input port 131 via a radio frequency cable 40.

[0041] It is understood that the multi-beam flat lens 13 receives the control signal of the reader 11 through the input port 131 and transmits the control signal to the antenna assembly 20 through the output port 132. Optionally, the output port 132 and the antenna assembly 20 are electrically connected via a radio frequency cable 40.

[0042] The multi-beam planar lens 13 includes an electromagnetic structure etched on a circuit board. By varying the electromagnetic periodic structure of the multi-beam planar lens 13, the direction of the control signal can be altered. Each input port 131 and corresponding output port 132 form a pair of ports, each corresponding to a specific electromagnetic periodic structure. This allows control signals transmitted to different input ports 131 to be adjusted to different preset directions. The multi-beam planar lens 13 can modulate the control signal into a plane wave.

[0043] It is understood that the antenna assembly 20 can emit the first beam 30 in different directions according to the control signals in different directions output by different output ports 132. The antenna assembly 20 is connected to the reader 11 through only one set of output ports 132 and input ports 131 at a time, that is, the antenna assembly 20 only emits the first beam 30 in one direction at a time.

[0044] The beneficial effects of this embodiment are as follows: the switch 12 of the signal transmitting device 100 of the embodiment of the present application can electrically connect the signal transmitting end 111 of the reader / writer 11 with different input ports 131 of the multi-beam planar lens 13, so that the multi-beam planar lens 13 can modulate the control signal into plane waves in different directions. The antenna assembly 20 is electrically connected to multiple output ports 132. The antenna assembly 20 can transmit plane waves (first beams 30) in different directions according to the control signals in different directions to cover different small areas, achieving near-field focusing, and the signal transmitting device 100 can more accurately locate the electronic tag 200. Compared with the ultra-high frequency array antenna, the signal transmitting device 100 of the embodiment of the present application controls the first beam 30 to change direction according to the preset coverage area through the switch 12. The method of controlling the antenna to locate the electronic tag 200 is simple, easy to manufacture, and can reduce costs. Therefore, it can solve the technical problem that the ultra-high frequency array antenna in the prior art requires a complex calculation process to control the antenna to locate the electronic tag 200, which is relatively expensive. In addition, the signal transmitting device 100 of the embodiment of the present application changes the direction of the control signal by changing the electromagnetic periodic structure of the multi-beam planar lens 13, which makes it easy to flexibly adjust the direction of the control signal and facilitates flexible adjustment of the preset coverage area of the first beam 30.

[0045] In some embodiments, please refer to Figure 2 The switch 12 includes a single-pole multi-throw (SPMT) RF switch, which includes a first pin 121, multiple second pins 122, and a switching unit 123. The first pin 121 is electrically connected to the reader / writer 11. One second pin 122 is electrically connected to an input port 131. The switching unit 123 is electrically connected to the first pin 121 and can be selectively electrically connected to any one of the multiple second pins 122.

[0046] It can be understood that the first pin 121 is always electrically connected to the signal transmitting end 111 of the reader / writer 11 .

[0047] Optionally, the second pins 122 and the input ports 131 may correspond one to one, or the second pins 122 and the input ports 131 may be set to different numbers.

[0048] It can be understood that the switching unit 123 is always electrically connected to the first pin 121 , and is electrically connected to one of the second pins 122 , switching between the second pins 122 to conduct different second pins 122 to the first pin 121 .

[0049] Exemplarily, the switching unit 123 may be a moving contact, and the different second pins 122 are connected to the first pin 121 by controlling the moving contact to be connected to the different second pins 122 .

[0050] Exemplarily, the switching unit 123 may also be a circuit structure, which controls the connection between the circuit structure and different second pins 122 so as to connect different second pins 122 to the first pin 121 .

[0051] The beneficial effects of this embodiment are: the signal transmitting device 100 of the embodiment of the present application uses a single-pole multi-throw radio frequency switch to electrically connect the reader 11 and the multi-beam planar lens 13, and electrically connects the first pin 121 with different second pins 122 through the switching unit 123, so that the signal transmitting end 111 of the reader 11 can be electrically connected to different input ports 131 of the multi-beam planar lens 13, and the signal transmitting end 111 can be conveniently controlled to be electrically connected to a specific input port 131 by controlling the switching unit 123.

[0052] In some embodiments, please refer to Figure 2 The signal transmitting device 100 includes a controller, which is electrically connected to the switching unit 123 and is used to control the operation of the switching unit 123.

[0053] It will be appreciated that the switching unit 123 of this embodiment is a circuit structure, and the controller controls the switching unit 123 to connect to different input ports 131 through electrical signals. When the reader 11 outputs a control signal, the controller can control the operation of the switching unit 123 according to the beam control program, switch the control signal to the corresponding input port 131, and modulate the control signal to the corresponding radiation angle.

[0054] The beneficial effect of this embodiment is that the signal transmitting device 100 of the embodiment of the present application uses a controller to conveniently control the switching unit 123 so that the control unit is connected to different second pins 122 in a preset order.

[0055] In some embodiments, please refer to Figure 1 and Figure 2 The signal transmitting device 100 includes a reader / writer assembly 10 , and the reader / writer assembly 10 includes a reader / writer 11 and at least one of a multi-beam planar lens 13 and a switch 12 .

[0056] It is understood that the reader / writer 11, the multi-beam planar lens 13, and the switch 12 can all be configured as electronic circuit structures. For example, the reader / writer 11, the multi-beam planar lens 13, and the switch 12 can be integrated together. For example, the reader / writer 11 and the multi-beam planar lens 13 are integrated together. For example, the reader / writer 11 and the switch 12 are integrated together.

[0057] The beneficial effect of this embodiment is that the signal transmitting device 100 of the embodiment of the present application integrates the reader 11 with the multi-beam planar lens 13 and / or the switch 12, which can reduce the volume of the signal transmitting device 100 compared to a dispersed setting.

[0058] In some embodiments, please refer to Figure 1 and Figure 2 The antenna assembly 20 includes a multi-port single antenna having a plurality of connection ports 21 , and one connection port 21 is electrically connected to one output port 132 .

[0059] Optionally, the connection ports 21 and the output ports 132 may correspond one to one, or the connection ports 21 and the output ports 132 may be different in number. The antenna can transmit the first beam 30 according to the control signals received by different connection ports 21 .

[0060] The beneficial effect of this embodiment is that the multi-port single antenna of the signal transmitting device 100 in the embodiment of the present application has a simpler structure than an array antenna, and the signal transmitting device 100 is more centralized.

[0061] In some embodiments, please refer to Figure 1 and Figure 2 The multi-port single antenna includes multiple antenna elements 22 , one antenna element 22 is electrically connected to one connection port 21 , and the multiple antenna elements 22 are distributed along the scanning direction X of the first beam 30 .

[0062] Optionally, the connection ports 21 and the antenna elements 22 may correspond one to one, or the connection ports 21 and the antenna elements 22 may be set to different numbers.

[0063] It will be understood that the antenna element 22 can receive a control signal and transmit a specific first beam 30 based on the received control signal. Only one antenna element 22 transmits the first beam 30 at a time. Multiple antenna elements 22 sequentially transmit first beams 30 in different directions, causing the coverage of the first beam 30 to continuously change. The direction of change in the coverage of the first beam 30 is the scanning direction X of the first beam 30. The first beam 30 can scan along a straight line or an arc. In other words, the scanning direction X of the first beam 30 can be a straight line or an arc.

[0064] The beneficial effect of this embodiment is that the signal transmitting device 100 of the embodiment of the present application distributes the antenna elements 22 along the scanning direction X of the first beam 30, so that adjacent antenna elements 22 transmit adjacent first beams 30 in sequence, so that the coverage ranges of adjacent first beams 30 in three-dimensional space can be connected together, and the coverage of the first beam 30 in three-dimensional space is more rigorous.

[0065] In some embodiments, the multi-beam planar lens 13 includes a planar Luneburg lens or a Rotman lens.

[0066] The beneficial effect of this embodiment is that the signal transmitting device 100 of the embodiment of the present application sets the multi-beam planar lens 13 as a planar Luneburg lens or a Rotman lens, which facilitates the setting of more input ports 131 and output ports 132 and facilitates the adjustment of the control signal to different directions.

[0067] Second, please refer to Figures 1 to 3 An embodiment of the present application also provides a positioning system 1000, including a signal transmitting device 100 of any one of the embodiments of the first aspect, and also including an electronic tag 200, the electronic tag 200 is used to receive the first beam 30 transmitted by the antenna assembly 20 and transmit a second beam to the antenna assembly 20.

[0068] The electronic tag 200 stores coded information. After receiving the first beam 30, the electronic tag 200 emits a specific second beam according to the coded information stored therein. The electronic tag 200 can move with the object.

[0069] The antenna assembly 20 can receive the second beam and transmit it to the reader 11. The reader 11 can locate the electronic tag 200 according to the second beam, and then locate the object where the electronic tag 200 is located.

[0070] The beneficial effect of this embodiment is that the positioning system 1000 of the embodiment of the present application adopts the above-mentioned signal transmitting device 100 to solve the technical problem in the prior art that the ultra-high frequency array antenna needs to use a complex calculation process to control the antenna to position the electronic tag 200, which is costly.

[0071] In some embodiments, please refer to Figures 1 to 3 The positioning system 1000 includes an identification area 300 , and the antenna assembly 20 is used to cyclically transmit the first beam 30 along different directions within the identification area 300 to cover the identification area 300 .

[0072] It is understood that the identification area 300 is the area used to identify and locate the electronic tag 200. The identification area 300 can be continuous or dispersed. The first beam 30 emitted simultaneously by the antenna assembly 20 covers a portion of the identification area 300. The antenna assembly 20 continuously emits the first beam 30 to sequentially cover different areas of the identification area 300. The sum of all areas covered by a single cycle of the emitted first beam 30 constitutes the entire identification area 300.

[0073] The beneficial effect of this embodiment is that the first beam 30 emitted by the positioning system 1000 of the present application embodiment covers a smaller area at a time, and the first beam 30 can be focused in the near field, thereby improving recognition accuracy. The first beam 30 can be quickly switched between different positions to locate the electronic tag 200 at different positions within the recognition area 300.

[0074] In some embodiments, please refer to Figures 1 to 3 The identification area 300 is spaced apart from the signal transmitting device 100 , and the scanning direction X of the first beam 30 is a direction perpendicular to the spacing direction Y between the identification area 300 and the signal transmitting device 100 .

[0075] It can be understood that there are multiple directions perpendicular to the spacing direction Y between the identification area 300 and the signal transmitting device 100 , and the scanning direction X of the first beam 30 can be any one of them.

[0076] Optionally, the identification area 300 is arranged below the signal transmitting device 100, that is, the spacing direction Y between the identification area 300 and the signal transmitting device 100 is a vertical direction, and the scanning direction X of the first beam 30 is any direction in the horizontal plane (such as horizontal horizontal or horizontal vertical).

[0077] The beneficial effect of this embodiment is that: the positioning system 1000 of the embodiment of the present application sets the scanning direction X of the first beam 30 to a direction perpendicular to the spacing direction Y between the identification area 300 and the signal transmitting device 100. Compared with the changing scanning direction X, the scanning direction X of the first beam 30 remains unchanged along one direction, so the emission direction of the first beam 30 changes less, and it is easier to design the direction of the control signal corresponding to the emission direction of the first beam 30.

[0078] The above multi-beam flat lens is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A signal transmitting device, characterized in that: include: The reader / writer includes a signal transmitting terminal for transmitting a control signal; A multi-beam planar lens, wherein the multi-beam planar lens comprises a plurality of input ports and a plurality of output ports, wherein the plurality of input ports correspond to the plurality of output ports in a one-to-one manner; a switch electrically connected to the signal transmitting end and selectively electrically connected to any one of the plurality of input ports; An antenna assembly is electrically connected to the plurality of output ports, and the antenna assembly is used to transmit a first beam.

2. The signal transmitting device according to claim 1, wherein: The switch includes a single-pole multi-throw radio frequency switch, which includes a first pin, multiple second pins and a switching unit; the first pin is electrically connected to the reader; one second pin is electrically connected to one of the input ports; the switching unit is electrically connected to the first pin and can be selectively electrically connected to any one of the multiple second pins.

3. The signal transmitting device according to claim 2, wherein: The signal transmitting device includes a controller, which is electrically connected to the switching unit and is used to control the operation of the switching unit.

4. The signal transmitting device according to claim 3, wherein: The signal transmitting device includes a reader / writer assembly, and the reader / writer assembly includes the reader / writer and at least one of the multi-beam planar lens and the switch.

5. The signal transmitting device according to claim 1, wherein: The antenna assembly includes a multi-port single antenna having a plurality of connection ports, wherein one of the connection ports is electrically connected to one of the output ports.

6. The signal transmitting device according to claim 5, wherein: The multi-port single antenna includes a plurality of antenna elements, one of the antenna elements is electrically connected to one of the connection ports, and the plurality of antenna elements are distributed along the scanning direction of the first beam.

7. The signal transmitting device according to claim 1, wherein: The multi-beam planar lens includes a planar Luneburg lens or a Rotman lens.

8. A positioning system, characterized in that: The signal transmitting device comprises the signal transmitting device according to any one of claims 1 to 7, further comprising an electronic tag, wherein the electronic tag is used to receive the first beam transmitted by the antenna assembly and transmit a second beam to the antenna assembly.

9. The positioning system according to claim 8, wherein: The positioning system includes an identification area, and the antenna assembly is used to cyclically transmit a first beam along different directions within the identification area to cover the identification area.

10. The positioning system according to claim 9, wherein: The identification area is spaced apart from the signal transmitting device, and a scanning direction of the first beam is a direction perpendicular to a direction of the spacing between the identification area and the signal transmitting device.

Images