Detection device and detection method

Abstract

A detection device for detecting an object under test, comprising a radar module, a waveguide element, and a first antenna element. The waveguide element is coupled to the radar module. The first antenna element is disposed on the waveguide element. The radar module is configured to generate a first electromagnetic incident wave, and the first antenna element is configured to emit the first electromagnetic incident wave toward the object under test. The first antenna element is further configured to receive a first electromagnetic reflected wave from the object under test, and the radar module is configured to process the first electromagnetic reflected wave. The first electromagnetic incident wave and the first electromagnetic reflected wave are configured to propagate through the waveguide element.

Description

Technical Field

[0001] This invention relates to a detection device, and more particularly to a detection device and its antenna structure. Background Technology

[0002] Head-mounted displays (HMDs) are widely used in virtual reality (VR), mixed reality (MR), and augmented reality (AR). To improve the user experience, HMDs require dedicated circuitry for detection functions. However, this dedicated circuitry can easily become a bottleneck in achieving lightweight design for HMDs. Therefore, a novel solution is needed to overcome the problems faced by previous technologies. Summary of the Invention

[0003] In a preferred embodiment, the present invention provides a detection device for detecting an object under test, comprising: a radar module; a waveguide element coupled to the radar module; and a first antenna element disposed on the waveguide element; wherein the radar module generates a first electromagnetic incident wave, and the first antenna element emits the first electromagnetic incident wave toward the object under test; wherein the first antenna element further receives a first electromagnetic reflected wave from the object under test, and the radar module further processes the first electromagnetic reflected wave; wherein both the first electromagnetic incident wave and the first electromagnetic reflected wave propagate through the waveguide element.

[0004] In some embodiments, the detection device is a head-mounted display.

[0005] In some embodiments, the object to be tested is a human face.

[0006] In some embodiments, the waveguide element is made of a high-density polyethylene (HDPE) material.

[0007] In some embodiments, the waveguide element is in the form of a ring.

[0008] In some embodiments, the first antenna element is a patch antenna.

[0009] In some embodiments, the detection device includes a total of 7 antenna elements.

[0010] In some embodiments, the detection device further includes: a second antenna element disposed on the waveguide element; wherein the radar module further generates a second electromagnetic incident wave, and the second antenna element emits the second electromagnetic incident wave toward the object under test; wherein the second antenna element further receives a second electromagnetic reflected wave from the object under test, and the radar module further processes the second electromagnetic reflected wave; wherein both the second electromagnetic incident wave and the second electromagnetic reflected wave propagate through the waveguide element.

[0011] In some embodiments, the detection device further includes: an optical module coupled to the waveguide element; and a first surface grid structure disposed on the waveguide element; wherein the optical module generates a first incident light wave, and the first surface grid structure emits the first incident light wave toward the object under test; wherein the first surface grid structure further receives a first reflected light wave from the object under test, and the optical module further processes the first reflected light wave; wherein both the first incident light wave and the first reflected light wave propagate through the waveguide element.

[0012] In some embodiments, the detection device further includes: a second surface grid structure disposed on the waveguide element; wherein the optical module generates a second incident light wave, and the second surface grid structure emits the second incident light wave toward the object under test; wherein the second surface grid structure receives a second reflected light wave from the object under test, and the optical module further processes the second reflected light wave; wherein both the second incident light wave and the second reflected light wave propagate through the waveguide element.

[0013] In some embodiments, the detection device further includes: a projection module coupled to the waveguide element and used to generate a projection light wave; wherein the projection light wave propagates through the waveguide element.

[0014] In another preferred embodiment, the present invention provides a detection method comprising the following steps: providing a radar module, a waveguide element, and a first antenna element, wherein the waveguide element is coupled to the radar module, and the first antenna element is disposed on the waveguide element; generating a first electromagnetic incident wave by means of the radar module, wherein the first electromagnetic incident wave propagates through the waveguide element; transmitting the first electromagnetic incident wave toward a test object by means of the first antenna element; receiving a first electromagnetic reflected wave from the test object by means of the first antenna element, wherein the first electromagnetic reflected wave propagates through the waveguide element; and processing the first electromagnetic reflected wave by means of the radar module.

[0015] In some embodiments, the detection method further includes: providing a second antenna element, wherein the second antenna element is disposed on the waveguide element; generating a second electromagnetic incident wave by means of the radar module, wherein the second electromagnetic incident wave propagates through the waveguide element; emitting the second electromagnetic incident wave toward the object under test by means of the second antenna element; receiving a second electromagnetic reflected wave from the object under test by means of the second antenna element, wherein the second electromagnetic reflected wave propagates through the waveguide element; and processing the second electromagnetic reflected wave by means of the radar module.

[0016] In some embodiments, the detection method further includes: providing an optical module and a first surface grid structure, wherein the optical module is coupled to the waveguide element, and the first surface grid structure is disposed on the waveguide element; generating a first incident light wave by means of the optical module, wherein the first incident light wave propagates through the waveguide element; emitting the first incident light wave toward the object under test by means of the first surface grid structure; receiving a first reflected light wave from the object under test by means of the first surface grid structure, wherein the first reflected light wave propagates through the waveguide element; and processing the first reflected light wave by means of the optical module.

[0017] In some embodiments, the detection method further includes: providing a second surface grid structure, wherein the second surface grid structure is disposed on the waveguide element; generating a second incident light wave by means of the optical module, wherein the second incident light wave propagates through the waveguide element; emitting the second incident light wave toward the object under test by means of the second surface grid structure; receiving a second reflected light wave from the object under test by means of the second surface grid structure, wherein the second reflected light wave propagates through the waveguide element; and processing the second reflected light wave by means of the optical module.

[0018] In some embodiments, the detection method further includes: providing a projection module, wherein the projection module is coupled to the waveguide element; and generating a projection light wave by means of the projection module, wherein the projection light wave propagates through the waveguide element. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0020] Figure 1 A schematic diagram of a detection device according to an embodiment of the present invention is shown;

[0021] Figure 2 A schematic diagram of a detection device according to an embodiment of the present invention is shown;

[0022] Figure 3A A schematic diagram of a waveguide element according to another embodiment of the present invention is shown;

[0023] Figure 3B A schematic diagram of a waveguide element according to yet another embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of a detection device according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of a detection device according to an embodiment of the present invention is shown; and

[0026] Figure 6 A flowchart of a detection method according to an embodiment of the present invention is shown.

[0027] Symbol explanation:

[0028] 100, 200, 400, 500: Detection devices

[0029] 110,210: Radar Module

[0030] 120, 220, 320, 322: Waveguide elements

[0031] 131,231,331: First antenna element

[0032] 141,241: First electromagnetic incident wave

[0033] 142,242: First electromagnetic reflected wave

[0034] 190, 290: Analytes

[0035] 232,332: Second antenna components

[0036] 233,333: Third antenna element

[0037] 243: Second electromagnetic incident wave

[0038] 244: Second electromagnetic reflected wave

[0039] 245: Third electromagnetic incident wave

[0040] 246: Third electromagnetic reflected wave

[0041] 334: Fourth Antenna Element

[0042] 335: Fifth Antenna Element

[0043] 336: Sixth Antenna Element

[0044] 337: Seventh Antenna Element

[0045] 450: Optical Module

[0046] 461: First surface grid structure

[0047] 462: Second surface grid structure

[0048] 463: Third Surface Grid Structure

[0049] 471: First incident light wave

[0050] 472: First reflected light wave

[0051] 473: Second incident light wave

[0052] 474: Second reflected light wave

[0053] 475: Third incident light wave

[0054] 476: Third reflected light wave

[0055] 580: Projection Module

[0056] 582: Projected light waves

[0057] P1: First position

[0058] P2: Second position

[0059] P3: Third position

[0060] S610, S620, S630, S640, S650: Steps

[0061] Δd1: First displacement

[0062] Δd2: Second displacement

[0063] Δd3: Third displacement Detailed Implementation

[0064] To make the objectives, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below in conjunction with the accompanying drawings for detailed explanation.

[0065] Certain terms are used in this specification and the claims to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and the claims do not distinguish components by differences in name, but by differences in function. The terms "comprising" and "including" used throughout this specification and the claims are open-ended and should be interpreted as "including but not limited to". The term "generally" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and achieve the basic technical effect within a certain margin of error. Furthermore, the term "coupled" in this specification includes any direct and indirect electrical connection means. Therefore, if a first device is described as coupled to a second device, it means that the first device can be directly electrically connected to the second device, or indirectly electrically connected to the second device via other devices or connection means.

[0066] The following disclosure provides many different embodiments or examples to implement the various features of this invention. The following disclosure describes specific examples of the various components and their arrangements for simplification. Of course, these specific examples are not intended to be limiting. For example, if this specification describes a first feature formed on or above a second feature, it indicates that it may include embodiments where the first and second features are in direct contact, or embodiments where an additional feature is formed between the first and second features, so that the first and second features may not be in direct contact. Furthermore, the same reference numerals and / or designations may be repeated in different examples of the following specification. These repetitions are for simplification and clarity and are not intended to limit any specific relationship between the different embodiments or / and structures discussed.

[0067] Furthermore, spatially related terms, such as "below," "below," "lower," "above," "higher," and similar terms, are used to facilitate the description of the relationship between one element or feature and another element(s) in the diagram. In addition to the orientation shown in the diagram, these spatially related terms are intended to encompass different orientations of the device in use or operation. The device may be rotated to different orientations (90 degrees or other orientations), and the spatially related terms used here can be interpreted in the same way.

[0068] Figure 1A schematic diagram of a detection device 100 according to an embodiment of the present invention is shown. For example, the detection device 100 can be incorporated into a head-mounted display (HMD) or a mobile device, such as a smartphone, a tablet computer, or a notebook computer. Figure 1 In one embodiment, the detection device 100 includes: a radar module 110, a waveguide element 120, and a first antenna element 131. It must be understood that, although not shown in... Figure 1 However, the detection device 100 may also include other components, such as a processor or a power supply module.

[0069] The detection device 100 can be used to detect an adjacent object under test 190. For example, the object under test 190 may be a human face, but it is not limited to this. In other embodiments, the object under test 190 may be any conductor or a part of the human body. It should be noted that the object under test 190 is not part of any part of the detection device 100.

[0070] For example, radar module 110 may include a transmitting antenna, a receiving antenna, and a signal processing unit (not shown). Waveguide element 120 is coupled to radar module 110. Waveguide element 120 has a relatively high dielectric constant, which may be greater than or equal to 2. In some embodiments, waveguide element 120 is made of high-density polyethylene (HDPE) material.

[0071] The first antenna element 131 is disposed on the waveguide element 120. In some embodiments, the first antenna element 131 may be a patch antenna, a monopole antenna, a dipole antenna, a loop antenna, a planar inverted FAntenna (PIFA), or a chip antenna, but is not limited to these.

[0072] In general, radar module 110 generates a first electromagnetic incident wave 141, and first antenna element 131 transmits the first electromagnetic incident wave 141 toward object under test 190. Then, first antenna element 131 receives a first electromagnetic reflected wave 142 from object under test 190. Finally, radar module 110 processes the first electromagnetic reflected wave 142. It is important to note that both the first electromagnetic incident wave 141 and the first electromagnetic reflected wave 142 can propagate through waveguide element 120. Since waveguide element 120 can be used to limit the propagation direction of the first electromagnetic incident wave 141 and the first electromagnetic reflected wave 142, in this design, radar module 110 can more easily obtain relevant information about object under test 190 by analyzing the first electromagnetic reflected wave 142. Furthermore, because radar module 110 does not require additional detection circuitry, this design also achieves the goals of weight reduction and lower manufacturing costs.

[0073] The following embodiments will illustrate various configurations and detailed structural features of the detection device 100. It must be understood that these figures and descriptions are merely examples and are not intended to limit the invention.

[0074] Figure 2 A schematic diagram of a detection device 200 according to an embodiment of the present invention is shown. Figure 2 and Figure 1 Similarly. In Figure 2 In one embodiment, the detection device 200 includes: a radar module 210, a waveguide element 220, a first antenna element 231, a second antenna element 232, and a third antenna element 233, wherein the first antenna element 231, the second antenna element 232, and the third antenna element 233 may be disposed at different positions on the waveguide element 220.

[0075] Radar module 210 can generate a first electromagnetic incident wave 241, a second electromagnetic incident wave 243, and a third electromagnetic incident wave 245. First antenna element 231 can transmit the first electromagnetic incident wave 241 towards a first position P1 of an object under test 290. In response, first antenna element 231 can also receive a first electromagnetic reflected wave 242 from the first position P1 of the object under test 290. Second antenna element 232 can transmit the second electromagnetic incident wave 243 towards a second position P2 of the object under test 290. In response, second antenna element 232 can also receive a second electromagnetic reflected wave 244 from the second position P2 of the object under test 290. Third antenna element 233 can transmit the third electromagnetic incident wave 245 towards a third position P3 of the object under test 290. In response, third antenna element 233 can also receive a third electromagnetic reflected wave 246 from the third position P3 of the object under test 290. Finally, radar module 210 can further process the first electromagnetic reflected wave 242, the second electromagnetic reflected wave 244, and the third electromagnetic reflected wave 246. It must be noted that the first electromagnetic incident wave 241, the first electromagnetic reflected wave 242, the second electromagnetic incident wave 243, the second electromagnetic reflected wave 244, the third electromagnetic incident wave 245, and the third electromagnetic reflected wave 246 can all propagate through waveguide element 220 (e.g., using the total internal reflection mechanism of waveguide element 220).

[0076] In detail, the first electromagnetic reflected wave 242 corresponds to a first displacement Δd1 at a first position P1 of the object under test 290, the second electromagnetic reflected wave 244 corresponds to a second displacement Δd2 at a second position P2 of the object under test 290, and the third electromagnetic reflected wave 246 corresponds to a third displacement Δd3 at a third position P3 of the object under test 290. By analyzing the first electromagnetic reflected wave 242, the second electromagnetic reflected wave 244, and the third electromagnetic reflected wave 246, the radar module 210 can obtain relevant information about the first displacement Δd1, the second displacement Δd2, and the third displacement Δd3 at different positions of the object under test 290. For example, the aforementioned displacement-related information can be derived by the radar module 210 based on the principle of Frequency Modulated Continuous Wave (FMCW) radar through phase change processing. If the object under test 290 is a human face, the radar module 210 can determine a user's current facial expression based on the information related to the first displacement Δd1, the second displacement Δd2, and the third displacement Δd3. That is, multi-point detection on a human face can be performed using a single radar module 210 in conjunction with the waveguide element 220. In some embodiments, the first electromagnetic incident wave 241, the second electromagnetic incident wave 243, and the third electromagnetic incident wave 245 are generated sequentially by the radar module 210, wherein the delay time between any two electromagnetic incident waves can be greater than or equal to 3.6 ns. In one embodiment, the aforementioned delay time can be exactly 3.6 ns. It must be understood that this delay time is only an example and can also be adjusted according to the different dielectric constants of the waveguide element 220 between the radar module 210 and the object under test 290. According to actual measurement results, the aforementioned delay time is sufficient to avoid confusion between the first electromagnetic reflected wave 242, the second electromagnetic reflected wave 244, and the third electromagnetic reflected wave 246. Figure 2 The remaining features of the detection device 200 are all the same Figure 1 The detection device 100 is similar to that of the other two embodiments, so both embodiments can achieve similar operational effects.

[0077] Figure 3A A schematic diagram of a waveguide element 320 according to another embodiment of the present invention is shown. Figure 3AIn some embodiments, the waveguide element 320 is in the form of a ring, wherein a first antenna element 331, a second antenna element 332, a third antenna element 333, a fourth antenna element 334, a fifth antenna element 335, a sixth antenna element 336, and a seventh antenna element 337 are respectively disposed at seven different positions on the waveguide element 320. According to actual measurement results, if more antenna elements are used in conjunction with the waveguide element 320, the corresponding detection device will be able to obtain more detailed detection results. In some embodiments, the first antenna element 331, the second antenna element 332, the third antenna element 333, the fourth antenna element 334, the fifth antenna element 335, the sixth antenna element 336, and the seventh antenna element 337 may have different distances relative to the radar module 210. For example, the aforementioned distances can all be greater than one wavelength (1λ) of the operating frequency of the first antenna element 331, the second antenna element 332, the third antenna element 333, the fourth antenna element 334, the fifth antenna element 335, the sixth antenna element 336, and the seventh antenna element 337.

[0078] Figure 3B A schematic diagram of a waveguide element 322 according to yet another embodiment of the present invention is shown. Figure 3B In one embodiment, waveguide element 322 is a metal leaky waveguide, which can simply form a leaky radar.

[0079] Figure 4 A schematic diagram of a detection device 400 according to an embodiment of the present invention is shown. Figure 4 and Figure 2 Similarly. In Figure 4 In the embodiments, the detection device 400 further includes: an optical module 450, a first surface grating structure 461, a second surface grating structure 462, and a third surface grating structure 463, wherein the first surface grating structure 461, the second surface grating structure 462, and the third surface grating structure 463 may be disposed at different locations on the waveguide element 220. For example, the first surface grating structure 461 may be adjacent to the first antenna element 231, the second surface grating structure 462 may be adjacent to the second antenna element 232, and the third surface grating structure 463 may be adjacent to the third antenna element 233, but it is not limited thereto. It should be noted that the terms "adjacent" or "adjacent" in this specification may refer to a distance between two corresponding elements that is less than a predetermined distance (e.g., 10 mm or less), or may include a situation where two corresponding elements are in direct contact with each other (i.e., the aforementioned distance is shortened to 0).

[0080] For example, the optical module 450 may include an infrared light-emitting diode (IRLED), a light sensor, and an optical processing unit (not shown). The optical module 450 is coupled to the waveguide element 220. The optical module 450 may generate a first incident light wave 471, a second incident light wave 473, and a third incident light wave 475. A first surface grid structure 461 may emit the first incident light wave 471 toward a first position P1 of the object under test 290. In response, the first surface grid structure 461 may also receive a first reflected light wave 472 from the first position P1 of the object under test 290. A second surface grid structure 462 may emit a second incident light wave 473 toward a second position P2 of the object under test 290. In response, the second surface grid structure 462 may also receive a second reflected light wave 474 from the second position P2 of the object under test 290. The third surface grating structure 463 can emit a third incident light wave 475 toward the third position P3 of the object under test 290. In response, the third surface grating structure 463 can also receive a third reflected light wave 476 from the third position P3 of the object under test 290. Finally, the optical module 450 can further process the first reflected light wave 472, the second reflected light wave 474, and the third reflected light wave 476. It should be noted that the first incident light wave 471, the first reflected light wave 472, the second incident light wave 473, the second reflected light wave 474, the third incident light wave 475, and the third reflected light wave 476 can all be propagated through the waveguide element 220 (e.g., using the total internal reflection mechanism of the waveguide element 220).

[0081] Specifically, the first reflected light wave 472 corresponds to a first physiological information at a first position P1 of the test object 290, the second reflected light wave 474 corresponds to a second physiological information at a second position P2 of the test object 290, and the third reflected light wave 476 corresponds to a third physiological information at a third position P3 of the test object 290. By analyzing the first reflected light wave 472, the second reflected light wave 474, and the third reflected light wave 476, the optical module 450 can acquire various physiological information at different positions of the test object 290. For example, the aforementioned physiological information may include blood oxygen level, respiratory rate, and / or pulse rate, but is not limited to these. In other embodiments, the detection device 400 may include more or fewer surface grid structures. Under this design, since both antenna elements and surface grid structures can be used simultaneously for dual detection, the detection device 400 can acquire more detailed information about the test object 290. Figure 4 The remaining features of the detection device 400 are all the same Figure 2 The detection device 200 is similar to that of the other two embodiments, so both embodiments can achieve similar operational effects.

[0082] Figure 5 A schematic diagram of a detection device 500 according to an embodiment of the present invention is shown. Figure 5 and Figure 4 Similarly. In Figure 5 In this embodiment, the detection device 500 further includes a projection module 580. The projection module 580 is coupled to the waveguide element 220 and is used to generate a projection light wave 582, wherein the projection light wave 582 can also be propagated through the waveguide element 220. For example, when the detection device 500 is implemented in a head-mounted device, the projection light wave 582 can provide the user with relevant images of virtual reality (VR), mixed reality (MR), or augmented reality (AR). Figure 5 The remaining features of the detection device 500 are all the same Figure 4 The detection device 400 is similar to that of the other two embodiments, so both embodiments can achieve similar operational effects.

[0083] Figure 6 A flowchart of a detection method according to an embodiment of the present invention is shown. In step S610, a radar module, a waveguide element, and a first antenna element are provided, wherein the waveguide element is coupled to the radar module, and the first antenna element is disposed on the waveguide element. In step S620, a first electromagnetic incident wave is generated by the radar module, wherein the first electromagnetic incident wave propagates through the waveguide element. In step S630, the first electromagnetic incident wave is emitted toward a target object by the first antenna element. In step S640, a first electromagnetic reflected wave is received from the target object by the first antenna element, wherein the first electromagnetic reflected wave propagates through the waveguide element. In step S650, the first electromagnetic reflected wave is processed by the radar module. It should be understood that the above steps do not need to be performed in sequence, and each feature of the embodiment in Figures 1-5 can be applied to... Figure 6 Among the detection methods.

[0084] This invention proposes a novel detection device and detection method. Compared with traditional designs, this invention has advantages such as miniaturized overall size and reduced manufacturing costs, making it well-suited for application in a wide variety of devices.

[0085] It is worth noting that the component parameters described above are not limiting conditions of the present invention. Designers can adjust these settings according to different needs. The detection device and detection method of the present invention are not limited to the states illustrated in Figures 1-6. The present invention may include only any one or more features of any one or more embodiments of Figures 1-6. In other words, not all features illustrated need to be implemented simultaneously in the detection device and detection method of the present invention.

[0086] The method, or a specific form or part thereof, of the present invention may exist in the form of a program. The program may be contained in a physical medium, such as a floppy disk, optical disk, hard disk, or any other machine-readable (e.g., computer-readable) storage device, or may be a computer program product not limited to an external form, wherein when the program is loaded and executed by a machine, such as a computer, that machine becomes a device for participating in the present invention. The program may also be transmitted via some transmission medium, such as wires or cables, optical fibers, or any transmission method, wherein when the program is received, loaded, and executed by a machine, such as a computer, that machine becomes a device for participating in the present invention. When implemented in a general-purpose processing unit, the program, in conjunction with the processing unit, provides a unique device that operates similarly to an application-specific logic circuit.

[0087] The ordinal numbers in this specification and the claims, such as "first," "second," "third," etc., are not sequential in any particular order; they are only used to distinguish between two different elements with the same name.

[0088] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art may make some modifications without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A detection device for detecting an object to be measured, comprising: One radar module; A waveguide element is coupled to the radar module; A first antenna element is disposed on the waveguide element; An optical module is coupled to the waveguide element; as well as A first surface grid structure is disposed on the waveguide element; The radar module generates a first electromagnetic incident wave, and the first antenna element emits the first electromagnetic incident wave toward the object under test. The first antenna element receives a first electromagnetic reflected wave from the object under test, and the radar module then processes the first electromagnetic reflected wave. Both the first electromagnetic incident wave and the first electromagnetic reflected wave propagate through the waveguide element. The optical module generates a first incident light wave, and the first surface grid structure emits the first incident light wave toward the object under test. The first surface grid structure receives a first reflected light wave from the object under test, and the optical module then processes the first reflected light wave. Both the first incident light wave and the first reflected light wave propagate through the waveguide element.

2. The detection device of claim 1, wherein the detection device is a head-mounted display.

3. The detection device as claimed in claim 1, wherein the object to be detected is a human face.

4. The detection device as claimed in claim 1, wherein the waveguide element is made of a high-density polyethylene material.

5. The detection device as claimed in claim 1, wherein the waveguide element is a metal leakage waveguide.

6. The detection device as claimed in claim 1, wherein the waveguide element is in the form of a ring.

7. The detection device as claimed in claim 5, wherein the metal waveguide has multiple branches.

8. The detection device as claimed in claim 1, wherein the first antenna element is a patch antenna.

9. The detection device as claimed in claim 1 further includes a plurality of antenna elements.

10. The detection apparatus of claim 9, wherein the plurality of antenna elements have different distances relative to the radar module.

11. The detection apparatus of claim 10, wherein the different distances are all greater than one wavelength of the operating frequency of the plurality of antenna elements.

12. The detection device as claimed in claim 1, further comprising: A second antenna element is mounted on the waveguide element; The radar module generates a second electromagnetic incident wave, and the second radar element emits the second electromagnetic incident wave toward the object under test. The second radar element receives a second electromagnetic reflected wave from the object under test, and the radar module then processes the second electromagnetic reflected wave. Both the second electromagnetic incident wave and the second electromagnetic reflected wave propagate through the waveguide element.

13. The detection device as claimed in claim 1, further comprising: A second surface grid structure is disposed on the waveguide element; The optical module generates a second incident light wave, and the second surface grid structure emits the second incident light wave toward the object under test. The second surface grid structure receives a second reflected light wave from the object under test, and the optical module then processes the second reflected light wave. Both the second incident light wave and the second reflected light wave propagate through the waveguide element.

14. The detection device as claimed in claim 1, further comprising: A projection module is coupled to the waveguide element and used to generate a projection light wave; The projected light wave propagates through this waveguide element.

15. A detection method, comprising the following steps: A radar module, a waveguide element, and a first antenna element are provided, wherein the waveguide element is coupled to the radar module, and the first antenna element is disposed on the waveguide element; The radar module generates a first electromagnetic incident wave, which propagates through the waveguide element. The first electromagnetic incident wave is emitted toward a test object using the first antenna element; A first electromagnetic reflected wave is received from the object under test by means of the first antenna element, wherein the first electromagnetic reflected wave propagates through the waveguide element; The radar module processes the first electromagnetic reflected wave. An optical module and a first surface grid structure are provided, wherein the optical module is coupled to the waveguide element, and the first surface grid structure is disposed on the waveguide element; The optical module generates a first incident light wave, which propagates through the waveguide element. The first incident light wave is emitted toward the object under test through the first surface grid structure; A first reflected light wave is received from the object under test via the first surface grid structure, wherein the first reflected light wave propagates through the waveguide element; and The first reflected light wave is processed by the optical module.

16. The detection method of claim 15, wherein the object to be detected is a human face.

17. The detection method of claim 15, wherein the waveguide element is made of a high-density polyethylene material.

18. The detection method of claim 15, wherein the waveguide element is in the form of a ring.

19. The detection method of claim 15, wherein the first antenna element is a patch antenna.

20. The detection method as described in claim 15, further comprising: A second antenna element is provided, wherein the second antenna element is disposed on the waveguide element; The radar module generates a second electromagnetic incident wave, which propagates through the waveguide element. The second electromagnetic incident wave is emitted toward the object under test using the second antenna element; Using the second antenna element, a second electromagnetic reflected wave is received from the object under test, wherein the second electromagnetic reflected wave propagates through the waveguide element; and The radar module processes the second electromagnetic reflected wave.

21. The detection method as described in claim 15, further comprising: A second surface grid structure is provided, wherein the second surface grid structure is disposed on the waveguide element; The optical module generates a second incident light wave, which propagates through the waveguide element. The second incident light wave is emitted toward the object under test through the second surface grid structure; The second surface grid structure receives a second reflected light wave from the object under test, wherein the second reflected light wave propagates through the waveguide element; and The second reflected light wave is processed using this optical module.

22. The detection method as described in claim 15, further comprising: A projection module is provided, wherein the projection module is coupled to the waveguide element; as well as The projection module generates a projection light wave, which propagates through the waveguide element.

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