Apparatus and method for fusing radar radio frequency sensing and heterojunction interface coupling technology

Abstract

The application provides a device and method of fusing radar radio frequency induction and heterogeneous interface coupling technology, through an electromagnetic super surface pattern array antenna with metal characteristics on the inner surface of the heterogeneous interface, a fixed module is bonded around the electromagnetic super surface pattern array antenna, the fixed module and the electromagnetic super surface pattern array antenna jointly form a closed electromagnetic wave resonance cavity region, a high polymer medium material for radiating and conducting electromagnetic waves is built-in, and a radar radio frequency induction control system; electromagnetic waves emitted by a radar microstrip antenna are repeatedly reflected, superimposed and enhanced in the electromagnetic wave resonance cavity region through the high polymer medium material, and then radiated to an external space induction area of the heterogeneous interface through the electromagnetic super surface pattern array antenna, so that activities or micro-motion targets in the induction area range are detected, and a double threshold control logic output control instruction is adopted to improve the induction and control precision of the radar induction system.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of radar radio frequency technology, in particular to a device and method fusing radar radio frequency induction and heterogeneous interface coupling technology. BACKGROUND

[0002] In the field of automatic induction and control applications, induction sensors are commonly used, such as induction radar, infrared optical ranging, and human body thermal release infrared induction, etc. Among them, the induction radar is used more and more due to its small size, adjustable action distance, and fast reaction speed, etc. For example, human body induction recognition of intelligent bathroom mirror cabinets. Generally, the induction radar uses a rectangular microstrip antenna or an array microstrip antenna, and does not control the front lobe and back lobe basically, and only adjusts the trigger threshold in a makeshift manner to meet the basic use requirements, but at the same time, it brings self-excitation, false triggering, or unclear control area, etc. Therefore, most induction still uses traditional infrared emission / receiving sensors, but the installation requirements are high, the action coverage is limited, and it is easy to be disturbed by environmental stray light. At the same time, in the use of bathroom coated glass mirrors, due to the shielding and reflection of the silver layer of the mirror surface, the induction radar cannot be directly applied, and the cost of household induction radar is limited. Generally, the induction radar uses a rectangular microstrip antenna or an array microstrip antenna, and does not control the front lobe and back lobe basically, and only adjusts the trigger threshold in a makeshift manner to meet the basic use requirements, but at the same time, it brings self-excitation, false triggering, or unclear control area, etc. Therefore, in the intelligent bathroom induction scene, traditional infrared emission / receiving sensors are still used, but the installation requirements are high, the action coverage is limited, and it is easy to be disturbed by environmental stray light. SUMMARY

[0003] In view of the above technical problems, the present application provides a device and method fusing radar radio frequency induction and heterogeneous interface coupling technology, which uses the moving target recognition function of the radar module and realizes signal superposition enhancement in space design, thereby overcoming the interference of heterogeneous materials in radar application.

[0004] Specifically, the device fusing radar radio frequency induction and heterogeneous interface coupling technology comprises at least:

[0005] An electromagnetic super surface pattern array antenna with metal characteristics is arranged on the inner surface of the heterogeneous interface, and the electromagnetic super surface pattern array antenna comprises a Tx antenna and a Rx antenna; a fixed module is bonded around the electromagnetic super surface pattern array antenna, and the fixed module comprises a fixed bottom frame and a fixed frame; the fixed module and the electromagnetic super surface pattern array antenna jointly form a semi-closed electromagnetic wave resonance cavity region; a high polymer dielectric material for radiating and conducting electromagnetic waves, and a radar radio frequency induction control system are built-in in the electromagnetic wave resonance cavity region.

[0006] The radar radio frequency induction control system comprises a PCB plate closely attached to the high polymer medium material, and a radio frequency radar chip arranged on the PCB plate.

[0007] Further, the fixing module is a detachable structure of a semi-closed type, and an opening is arranged on the side where the external interface is located, for communication connection of the external interface and an external circuit.

[0008] The electromagnetic super surface pattern array antenna is a specific character and pattern structure arranged in a periodical manner according to a specific rule, and is directly processed in a heterogeneous interface inner surface through a laser processing technology; the specific character and pattern are at least one or more of characters, rectangles, circles and V shapes, but are not limited thereto; the interval width of the specific character and pattern on all the heterogeneous interface inner surfaces is set to be between 0.2 mm and 0.8 mm.

[0009] The length and width of the electromagnetic super surface pattern array antenna correspond to the length and width of the radar microstrip antenna in a proportion of 1:1.2 to 1.8.

[0010] The high polymer medium material has a thickness value of 1 / 8 to 1 / 32 of the corresponding radar radio frequency wavelength, and a relative dielectric constant less than or equal to 3.5.

[0011] Radiation micro waveguide through holes are arranged in positions corresponding to the Tx microstrip antenna and the Rx microstrip antenna in the high polymer medium material, respectively, the diameter of the radiation micro waveguide through hole is 1 / 8 to 1 / 32 of the corresponding radar radio frequency wavelength; the center of the radiation micro waveguide through hole is respectively overlapped and aligned with the edge of the Tx microstrip antenna and the Rx microstrip antenna; and the radiation micro waveguide through hole is perpendicular to the PCB plate plane.

[0012] As another preferred, the application further provides a radar radio frequency induction and heterogeneous interface coupling method, comprising:

[0013] The radar radio frequency induction control system transmits high-frequency electromagnetic waves through the Tx microstrip antenna with a preset period, which is repeatedly reflected, superimposed and enhanced through the electromagnetic wave resonance cavity area, and then coupled to the external induction detection area through the Tx antenna of the electromagnetic super surface pattern array antenna; when the activity or micro-motion target appears in the induction detection area, the Rx antenna of the electromagnetic super surface pattern array antenna receives the reflected wave of the activity or micro-motion target, and then conducts the reflected wave to the Rx microstrip antenna of the radar radio frequency induction control system through the polymer medium material containing the radiation micro waveguide through hole; the radar radio frequency induction control system outputs the preset control instruction according to the double threshold control logic of the reflected wave. Wherein, the electromagnetic super surface pattern array antenna is a specific character and pattern structure arranged periodically according to a specific rule, and the specific character and pattern are at least one of characters, rectangles, circles and V-shaped patterns.

[0014] The double threshold control logic output control instruction includes:

[0015] S1: according to the reflected information in the external induction detection area, it is judged whether there is an activity target, if the activity target test value is greater than or equal to the first program threshold value, it is judged that there is an activity target, and the external interface outputs high level; at the same time, the activity target detection threshold is adjusted to the second program threshold value, and S2 is entered; otherwise, there is no dynamic target, and S3 is converted;

[0016] S2: start the micro-motion detection program, judge whether the micro-motion target exists continuously, if the micro-motion target test value is greater than the second program threshold value, it is judged that the micro-motion target exists continuously, and the external interface outputs high level continuously; otherwise, there is no micro-motion target, and S3 is converted;

[0017] S3: the external interface outputs low level, and the second program threshold value is restored to the first program threshold value.

[0018] The external induction detection area is a region in a preset range on the opposite side of the heterojunction interface where the radar microstrip antenna array is located.

[0019] In summary, the application provides a device and method of fusing radar radio frequency induction and heterogeneous interface coupling technology, a Tx microstrip antenna of a radar radio frequency induction control system is used to emit high-frequency electromagnetic waves at a preset period, after repeated reflection, superposition and enhancement in an electromagnetic wave resonance cavity area, the electromagnetic waves are coupled and emitted to an external induction detection area through a Tx antenna of an electromagnetic super surface pattern array antenna; when an active or micro-motion target appears in the induction detection area, a Rx antenna of the electromagnetic super surface pattern array antenna receives the reflected waves of the active or micro-motion target, and then the reflected waves are conducted to a Rx microstrip antenna of the radar radio frequency induction control system through a polymer medium material, the radar radio frequency induction control system performs double threshold control logic according to the reflected waves, and outputs a preset control instruction, thereby improving the induction and control precision of the radar induction system.

[0020] The application has the beneficial effects that the metal plating layer of the heterogeneous interface can effectively solve the shielding and back reflection problems of high-frequency radar signals, the electromagnetic super surface pattern array antenna and the antenna structure setting effectively improve the gain of the transmitting antenna, improve the gain of the transmitting antenna front lobe, control the back lobe and side lobe intensity, eliminate false actions and improve stability, the front induction response azimuth angle is greater than 90 degrees through the super surface antenna structure, the identification area is increased, the reliability of the induction radar in intelligent control application is improved, the induction sensitivity is improved, and background noise and false actions are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A schematic diagram of a radar radio frequency induction and heterogeneous interface coupling device according to the application.

[0022] Figure 2 A schematic diagram of a Tx microstrip antenna and a Rx microstrip antenna of a radar radio frequency induction control system according to the application.

[0023] Figure 3 A schematic diagram of an external induction detection coverage range of an electromagnetic super surface pattern array antenna according to the application.

[0024] Figure 4 The specific size of a Tx antenna of an electromagnetic super surface pattern array antenna.

[0025] Figure 5 A schematic diagram of a radiation micro waveguide via hole formed in a polymer medium material according to the application.

[0026] Figure 6 A control method flow chart of a radar radio frequency induction and heterogeneous interface coupling technology according to the application.

[0027] 1-hetero interface; 2-metal coating of the inner surface of the hetero interface; 3-electromagnetic super surface pattern array antenna (including Tx antenna and Rx antenna); 4-fixing module; 5-polymer dielectric material; 6-radiation micro waveguide via; 7-electromagnetic wave resonance cavity region; 8-PCB board; 9-radar RF chip; 10-Tx microstrip antenna; 11-Rx microstrip antenna; 12-gap between the metal protective coating and the electromagnetic super surface pattern array antenna; 13-coupling micro-wire. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor are within the protection scope of the present application.

[0029] As shown in Figure 1 The fusion radar RF induction and hetero interface coupling device of the present application at least includes:

[0030] The electromagnetic super surface pattern array antenna with metal characteristics is arranged on the inner surface of the hetero interface, and the electromagnetic super surface pattern array antenna includes Tx antenna and Rx antenna; the fixing module is bonded around the electromagnetic super surface pattern array antenna, and the fixing module includes a fixing bottom frame and a fixing frame; the fixing module and the electromagnetic super surface pattern array antenna together form a semi-closed electromagnetic wave resonance cavity region; the polymer dielectric material for radiating and conducting electromagnetic waves and the radar RF induction control system are built-in in the electromagnetic wave resonance cavity region.

[0031] The hetero interface is preferably a mirror or a panel of other materials, but is not limited thereto.

[0032] The radar RF induction control system at least includes: a PCB board closely bonded with the polymer dielectric material, and a radar RF chip arranged on the PCB board; as shown in Figure 2 The Tx port and the Rx port of the radar RF chip are respectively connected with the Tx microstrip antenna and the Rx microstrip antenna on the PCB board through the coupling micro-wire; and an external interface is arranged at the edge position of the PCB board.

[0033] Further, the fixing module is a detachable structure of a semi-closed type, and an opening is arranged at the side where the external interface is located, for communication connection between the external interface and an external circuit.

[0034] The electromagnetic super surface pattern array antenna is a specific character and pattern structure arranged periodically according to a specific rule, and is directly processed on the inner surface of the heterogeneous interface by a laser processing technology. Figure 3 As shown in the figure, the electromagnetic super surface pattern array antenna makes the front induction response angle of the external induction detection area greater than 90 degrees, and the identification area is increased.

[0035] The length and width of the electromagnetic super surface pattern array antenna correspond to the length and width of the radar microstrip antenna in a ratio of 1:1.2 to 1.8. Figure 4

[0036] The thickness of the polymer medium material is 1 / 8 to 1 / 32 of the corresponding radar radio frequency wavelength.

[0037] As shown in the figure, radiation micro waveguide through holes are opened in the polymer medium material corresponding to the positions of the Tx microstrip antenna and the Rx microstrip antenna. Figure 5 The diameter of the radiation micro waveguide through hole is 1 / 8 to 1 / 32 of the corresponding radar radio frequency wavelength.

[0038] As another preferred embodiment, as shown in the figure, the application also provides a radar radio frequency induction and heterogeneous interface coupling method. Figure 6 The method specifically includes:

[0039] ​The radar radio frequency induction control system transmits high frequency electromagnetic waves through the Tx microstrip antenna with a preset period, and after repeated reflection, superposition and enhancement in the electromagnetic wave resonance cavity area, the electromagnetic waves are coupled and transmitted to the external induction detection area through the Tx antenna of the electromagnetic super surface pattern array antenna; when the activity or micro-motion target appears in the induction detection area, the Rx antenna of the electromagnetic super surface pattern array antenna receives the reflected waves of the activity or micro-motion target, and then the reflected waves are conducted to the Rx microstrip antenna of the radar radio frequency induction control system through the polymer medium material containing the radiation micro waveguide through hole; the radar radio frequency induction control system performs double threshold control logic according to the reflected waves and outputs a preset control instruction. The electromagnetic super surface pattern array antenna is a specific character and pattern structure arranged periodically according to a specific rule, and the specific character and pattern are at least one of characters, rectangles, circles and V-shaped patterns.

[0040] The double threshold control logic output control instruction includes:

[0041] S1: According to the reflected information in the external induction detection area, it is judged whether there is an activity target, if the activity target detection value is greater than or equal to the first program threshold value, it is judged that there is an activity target, and the external interface outputs high level; at the same time, the activity target detection threshold is adjusted to the second program threshold value, and S2 is entered; otherwise, there is no dynamic target, and S3 is turned to;

[0042] S2: Start the micro-motion detection program, judge whether the micro-motion target exists continuously, if the micro-motion target detection value is greater than the second program threshold value, it is judged that the micro-motion target exists continuously, and the external interface outputs high level continuously; otherwise, there is no micro-motion target, and S3 is turned to;

[0043] S3: The external interface outputs low level, and the second program threshold value is restored to the first program threshold value.

[0044] The external induction detection area is a region in a preset range on the opposite side of the radar microstrip antenna array on the hetero-interface.

[0045] The above-mentioned embodiments only express one embodiment of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A hybrid radar radio frequency induction and heterojunction interface coupling device, comprising: At least comprising: An electromagnetic super surface pattern array antenna with metal characteristics set in the inner surface of the heterogeneous interface, which includes Tx antenna and Rx antenna; A fixed module is bonded around the electromagnetic super surface pattern array antenna, which contains a fixed bottom frame and a fixed frame; The fixed module and the electromagnetic super surface pattern array antenna form a semi-closed electromagnetic wave resonance cavity region together; A polymer medium material for radiating and conducting electromagnetic waves is built in the electromagnetic wave resonance cavity region, and a radar radio frequency induction control system is built in; Wherein, the radar radio frequency induction control system at least includes: a PCB board closely combined with the polymer medium material, and a radio frequency radar chip provided on the PCB board, the Tx port and the Rx port of the radio frequency radar chip are connected to the Tx microstrip antenna and the Rx microstrip antenna on the PCB board through coupling micro wires, and an external interface is provided at one edge of the PCB board.

2. The device of claim 1, wherein the device is a fusion of radar RF induction and heterojunction interface coupling. The fixed module is a detachable structure of semi-closed type, and an opening is provided on the side where the external interface is located, which is used for communication connection between the external interface and external circuit.

3. The device of claim 2, wherein the device is a fusion of radar RF induction and heterojunction interface coupling. The electromagnetic super surface pattern array antenna is a specific character and pattern structure arranged periodically according to a specific rule, which is directly processed on the inner surface of the heterogeneous interface by laser processing technology; the specific character and pattern are any one or several of character, rectangle, circle and V type; the interval width of the specific character and pattern on all inner surfaces of the heterogeneous interface is set to 0.2mm to 0.8mm.

4. The fused radar RF induction and heterojunction interface coupling device of claim 3, wherein, The length and width of the electromagnetic super surface pattern array antenna correspond to the length and width of the radar microstrip antenna in a ratio of 1:1.2 to 1.

8.

5. The fused radar RF induction and heterojunction interface coupling device of claim 4, wherein, The thickness of the polymer medium material is 1 / 8 to 1 / 32 of the corresponding radar radio frequency wavelength, and the relative dielectric constant is less than or equal to 3.

5.

6. The fused radar RF induction and heterojunction interface coupling device of claim 5, wherein, Radiation micro waveguide through holes are opened in the polymer medium material corresponding to the positions of the Tx microstrip antenna and the Rx microstrip antenna, respectively, the diameter of the radiation micro waveguide through hole is 1 / 8 to 1 / 32 of the corresponding radar radio frequency wavelength; the centers of the radiation micro waveguide through holes are respectively overlapped and aligned with the edges of the Tx microstrip antenna and the Rx microstrip antenna.

7. A method of fusing radar radio frequency sensing and heterojunction interface coupling, the method comprising: receiving a radar signal from a radar sensor; receiving a signal from a heterojunction interface sensor; and fusing the radar signal and the signal from the heterojunction interface sensor. Including: The Tx microstrip antenna of the radar radio frequency induction control system transmits high-frequency electromagnetic waves at a preset period, which is repeatedly reflected, superimposed and enhanced in the electromagnetic wave resonance cavity region, and then coupled to the external induction detection area through the Tx antenna of the electromagnetic super surface pattern array antenna; when there is a moving target in the induction detection area, the Rx antenna of the electromagnetic super surface pattern array antenna receives the reflected wave of the moving target, which is then conducted to the Rx microstrip antenna of the radar radio frequency induction control system through the polymer medium material, and the radar radio frequency induction control system outputs a preset control instruction according to the double threshold control logic of the reflected wave; Wherein, the double threshold control logic output control instruction includes: S1: judging whether there is an active target according to the reflection information in the external induction detection area, if the active target detection value is greater than or equal to the first program threshold, it is judged that there is an active target, the external interface outputs high level; at the same time, the active target detection threshold is adjusted to the second program threshold, and S2 is entered; otherwise, there is no active target, and S3 is converted; S2: starting the micro-motion detection program, judging whether the micro-motion target exists continuously, if the micro-motion target detection value is greater than the second program threshold, it is judged that the micro-motion target exists continuously, and the external interface outputs high level continuously; otherwise, there is no micro-motion target, and S3 is converted; S3: the external interface outputs low level, and the second program threshold is restored to the first program threshold.

8. The method of claim 7, wherein the method further comprises: The external induction detection area is an area in a preset range on the opposite side of the face of the radar microstrip antenna array on the heterojunction.

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