Millimeter wave radar detection circuit, printed circuit board and detector

Abstract

The embodiment of the utility model relates to a millimeter wave radar detection circuit, a printed circuit board and a detector. The circuit provided by the embodiment of the utility model comprises a female header connecting module which comprises a first contact and a second contact; when the female header connection module is connected with a first radar module, the millimeter wave radar detection circuit forms a first circuit structure; the first circuit structure comprises a light sensing module, a communication module, the first radar module and an external MCU (300) arranged outside the first radar module; when the female header connection module is connected with a second radar module, the millimeter wave radar detection circuit forms a second circuit structure; the second circuit structure comprises a light sensing module, a communication module and a second radar module; the second radar module is provided with a built-in MCU. According to the millimeter wave radar detection circuit, the printed circuit board and the detector, the problems in the prior art can be effectively solved, and the production efficiency is high.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of sensors, and in particular, to a millimeter wave radar detection circuit, a printed circuit board, and a detector. Background Art

[0002] In the prior art, millimeter-wave radar detectors are generally used to detect human bodies in an area, and then the detection signal is transmitted to the controller. After receiving the detection signal, the controller generates an execution instruction, and the execution device responds to the execution action after receiving the execution instruction; thereby realizing the scene linkage function, such as opening when people come and closing when people leave.

[0003] However, in actual use, the millimeter-wave radar detectors of the prior art still have the problems of limited usage scenarios and low production efficiency. Utility Model Content

[0004] The embodiments of the present application provide a millimeter wave radar detection circuit, a printed circuit board and a detector, which are intended to solve at least one of the above problems.

[0005] In a first aspect, an embodiment of the present application provides a millimeter wave radar detection circuit, the millimeter wave radar detection circuit comprising:

[0006] A female connector module comprises: a first contact (110) and a second contact (120);

[0007] When the first radar module is connected to the busbar connection module, the millimeter wave radar detection circuit forms a first circuit structure; the first circuit structure comprises: a light sensing module, a communication module, the first radar module, and an external MCU (300) external to the first radar module; wherein the light sensing module is connected to the external MCU (300) to transmit the detected light signal to the external MCU; the first radar module is connected to the external MCU (300) via a first contact (110) of the busbar connection module to transmit the detected radar signal to the external MCU (300); the external MCU (300) is communicatively connected to the communication module;

[0008] When the second radar module is connected to the busbar connection module, the millimeter-wave radar detection circuit forms a second circuit structure; the second circuit structure includes: the light sensing module, the communication module and the second radar module; the second radar module has a built-in MCU; wherein the light sensing module is connected to the second radar module through the second contact (120) of the busbar connection module to transmit the detected light signal to the second radar module; the second radar module is also used to detect radar signals; the second radar module is connected to the communication module through the first contact (110) of the busbar connection module.

[0009] Optionally, the circuit further comprises: a third circuit (730), comprising a first terminal, a second terminal, and a third terminal;

[0010] The optical sensing module is connected to a first end of the third circuit (730), and a second end of the third circuit (730) is connected to a second contact (120) of the female connector module to form a first optical branch;

[0011] The optical sensing module is connected to a first end of a third circuit (730), and a third end of the third circuit (730) is connected to the external MCU (300), so as to form a second optical branch;

[0012] When the first radar module is connected to the busbar connection module, the first optical branch is disconnected and the second optical branch is connected;

[0013] When the second radar module is connected to the busbar connection module, the second optical branch is disconnected and the first optical branch is connected.

[0014] Optionally, the communication module includes at least one of a wireless communication module, a 485 communication module, and a dry contact module.

[0015] Optionally, the communication module includes: a wireless communication module;

[0016] The circuit also includes a first circuit (710), wherein the first circuit (710) includes a first terminal, a second terminal, and a third terminal;

[0017] The first contact (110) of the female connector module is connected to the external MCU (300), the external MCU (300) is connected to the second end of the first circuit (710), and the third end of the first circuit (710) is connected to the wireless communication module to form a first path;

[0018] The first contact (110) of the female connector module is connected to the first end of the first circuit (710), and the third end of the first circuit (710) is connected to the wireless communication module to form a second path;

[0019] When the first radar module is connected to the female connector module, the first path is connected and the second path is disconnected;

[0020] When the second radar module is connected to the female connector module, the second path is connected and the first path is disconnected.

[0021] Optionally, the communication module includes: a 485 communication module;

[0022] The circuit also includes a second circuit (720) including a first terminal, a second terminal, and a third terminal;

[0023] The first contact (110) of the busbar connection module is connected to the external MCU (300), the external MCU (300) is connected to the second end of the second circuit (720), and the third end of the second circuit (720) is connected to the 485 communication module to form a first circuit;

[0024] The first contact (110) of the female connector module is connected to the first end of the second circuit (720), and the third end of the second circuit (720) is connected to the 485 communication module to form a second circuit;

[0025] When the first radar module is connected to the busbar connection module, the first circuit is connected and the second circuit is disconnected;

[0026] When the second radar module is connected to the female connector module, the second circuit is connected and the first circuit is disconnected.

[0027] Optionally, the communication module includes: a dry contact module;

[0028] The female connector module further comprises a third contact, wherein the third contact is connected to one end of the dry contact module; the other end of the dry contact module is connected to an external MCU (300);

[0029] When the first radar module is connected to the busbar connection module, the other end of the dry contact module is connected to the external MCU (300), and the third contact of the busbar connection module is disconnected from one end of the dry contact module;

[0030] When the second radar module is connected to the busbar connection module, the other end of the dry contact module is disconnected from the external MCU (300), and the third contact of the busbar connection module is connected to one end of the dry contact module.

[0031] In a second aspect, an embodiment of the present application provides a printed circuit board, including the millimeter wave radar detection circuit described in the first aspect of the embodiment of the present application, and the first radar module is mounted on the printed circuit board.

[0032] In a third aspect, an embodiment of the present application provides a printed circuit board, including the millimeter wave radar detection circuit described in the first aspect of the embodiment of the present application, and the second radar module is mounted on the printed circuit board.

[0033] In a fourth aspect, an embodiment of the present application provides a millimeter wave radar detector, comprising the printed circuit board described in the second aspect or the third aspect of the embodiment of the present application.

[0034] In an embodiment of the present application, a busbar connection module having a first contact and a second contact is provided, a first circuit structure is formed when the busbar connection module is connected to a first radar module, and a second circuit structure is formed when the busbar connection module is connected to a second radar module, so that a user can select different radar modules in the same circuit.

[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of the structure of a millimeter wave radar detection circuit provided in an exemplary embodiment;

[0037] Figure 2 A schematic diagram of the structure of a millimeter wave radar detection circuit provided in an exemplary embodiment;

[0038] Figure 3 A schematic diagram of the structure of a millimeter wave radar detection circuit provided in an exemplary embodiment;

[0039] Figure 4 A schematic diagram of the structure of a millimeter wave radar detection circuit provided in an exemplary embodiment;

[0040] Figure 5 A schematic diagram of the structure of a millimeter wave radar detection circuit provided in an exemplary embodiment;

[0041] Figure 6 The present invention is a schematic diagram of the structure of a millimeter wave radar detection circuit provided in an exemplary embodiment. DETAILED DESCRIPTION

[0042] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0043] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0044] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0045] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0047] In the actual production and development process, manufacturers will choose different radar modules according to their own needs. In order to meet the requirements of different radar modules, different circuit solutions need to be designed in the existing technology, and then different circuit boards need to be printed to match them, but the production efficiency is low. For example, some manufacturers will choose the solution of radar modules with external MCU, and some manufacturers will choose the solution of radar modules with built-in MCU. When using radar modules with external MCU and built-in MCU, their circuit structures will be slightly different. For this reason, existing circuit suppliers need to design different circuit structures and print different boards to match them. On the one hand, it leads to low efficiency, and on the other hand, because the board materials are completely non-universal, it is also easy to cause certain waste.

[0048] To address this technical problem, an embodiment of the present application provides a millimeter wave radar detection circuit. When using the circuit, a user can select different radar modules in the same circuit.

[0049] like Figure 1As shown, in an exemplary embodiment, the millimeter wave radar detection circuit of the present application includes: a female connector module 100 including: a first contact 110 and a second contact 120 .

[0050] When the first radar module 500 is connected to the busbar connection module 100, the millimeter wave radar detection circuit forms a first circuit structure, such as Figure 2 The first circuit structure includes: a light sensing module 200, a communication module 400, the first radar module 500, and an external MCU 300 external to the first radar module; wherein the light sensing module 200 is connected to the external MCU 300 to transmit the detected light signal to the external MCU 300; the first radar module 500 is connected to the external MCU 300 through the first contact 110 of the female connector module 100 to transmit the detected radar signal to the external MCU 300; the external MCU 300 is communicatively connected to the communication module.

[0051] When the second radar module 600 is connected to the busbar connection module 100, the millimeter wave radar detection circuit forms a second circuit structure, such as Figure 3 The second circuit structure includes: the light sensing module 200, the communication module 400 and the second radar module 600; the second radar module 600 has a built-in MCU; wherein the light sensing module 200 is connected to the second radar module 600 through the second contact 120 of the female connector module 100 to transmit the detected light signal to the second radar module; the second radar module is also used to detect radar signals; the second radar module is connected to the communication module 400 through the first contact 110 of the female connector module.

[0052] In the millimeter-wave radar detection circuit of the embodiment of the present application, a busbar connection module having a first contact and a second contact is provided, and a first circuit structure is formed when the busbar connection module is connected to a first radar module, and a second circuit structure is formed when the busbar connection module is connected to a second radar module, so that a user can select different radar modules in the same circuit.

[0053] In some exemplary embodiments, the millimeter wave radar detection circuit of the present application further includes: at least one of a first circuit 710, a second circuit 720, and a third circuit 730. The communication module includes at least one of a wireless communication module, a 485 communication module, and a dry contact module. The first circuit 710 is used to connect to the wireless communication module, the second circuit 720 is used to connect to the 485 communication module, and the third circuit 730 is used to connect to the light sensing module 200.

[0054] Preferably, the millimeter wave radar detection circuit of the present application includes a first circuit 710, a second circuit 720 and a third circuit 730. The communication module includes a wireless communication module, a 485 communication module and a dry contact module.

[0055] Specifically, Figure 4 As shown, in one embodiment, the millimeter wave radar detection circuit further includes: a first circuit 710, a second circuit 720 and a third circuit 730. The communication module includes a wireless communication module 410, a 485 communication module 420 and a dry contact module 430.

[0056] The first circuit 710, the second circuit 720, the third circuit 730, and the dry contact module 430 are described in detail below:

[0057] Wherein, the third circuit 730 includes a first end 731, a second end 732, and a third end 733. The optical sensing module 200 is connected to the first end 731 of the third circuit, and the second end 732 of the third circuit is connected to the second contact 120 of the busbar connection module to form a first optical branch. The optical sensing module 200 is connected to the first end 731 of the third circuit, and the third end 733 of the third circuit is connected to the external MCU 300 to form a second optical branch. When the first radar module 500 is connected to the busbar connection module 100, the first optical branch is not connected, and the second optical branch is connected; when the second radar module is connected to the busbar connection module, the second optical branch is not connected, and the first optical branch is connected.

[0058] Specifically, Figure 5 As shown, the second contact 120 of the female connector module 100 includes two contacts.

[0059] The third circuit 730 includes a first-first resistor R11 , a first-second resistor R12 , a second-first resistor R21 , and a second-second resistor R22 .

[0060] The first resistor R11 and the first second resistor R12 are connected in series, one end of the first resistor R11 is connected to one of the second contacts 120 of the female connector module, and one end of the first second resistor R12 is connected to the external MCU 300. There is a first node between the first resistor R11 and the first second resistor R12, and the first node is connected to the light sensing module 200.

[0061] The second first resistor R21 and the second second resistor R22 are connected in series, one end of the second first resistor R21 is connected to the other of the second contacts 120 of the female connector module, and one end of the second second resistor R22 is connected to the external MCU 300. There is a second node between the second first resistor R21 and the second second resistor R22, and the second node is connected to the light sensing module 200.

[0062] A node between the first-first resistor R11 and the first-second resistor R12 and a node between the second-first resistor R21 and the second-second resistor R22 form a first end 731 of the third circuit 730 .

[0063] One end of the first resistor R11 connected to the second contact 120 of the female connector module and one end of the second resistor R21 connected to the second contact 120 of the female connector module form the second end 732 of the third circuit 730 .

[0064] One end of the first resistor R12 connected to the external MCU 300 and one end of the second resistor R22 connected to the external MCU 300 form a third end 733 of the third circuit 730 .

[0065] The light sensing module 200 is connected to one of the second contacts 120 of the busbar connection module via the first node and the first resistor R11, and the light sensing module 200 is connected to the other of the second contacts 120 of the busbar connection module via the second node and the second resistor R21, forming the first optical branch. The light sensing module 200 is connected to the external MCU 300 via the first node and the first resistor R12, and the light sensing module 200 is connected to the external MCU 300 via the second node and the second resistor R22, forming the second optical branch.

[0066] When printing the PCB board, the millimeter-wave radar detection circuit of the embodiment of the present application first prints the circuit circuit on the substrate, and then assembles the electrical components. During assembly, the corresponding circuit structure is selected to assemble the corresponding components according to the needs of the manufacturer. For example, when the first radar module is connected to the mother-connecting module 100, the first resistor R11 and the first resistor R12 are not assembled. When the second radar module is connected to the mother-connecting module 100, the first resistor R12, the second resistor R22, and the external MCU 300 are not assembled. In this way, a corresponding circuit structure is formed, such as Figure 2 , 3 shown.

[0067] Among them, the first circuit 710 includes a first end 711, a second end 712, and a third end 713. The first contact 110 of the busbar connection module is connected to the external MCU 300, the external MCU 300 is connected to the second end 712 of the first circuit, and the third end 713 of the first circuit is connected to the wireless communication module to form a first path. The first contact 110 of the busbar connection module is connected to the first end 711 of the first circuit, and the third end 713 of the first circuit is connected to the wireless communication module to form a second path. When the first radar module is connected to the busbar connection module, the first path is connected and the second path is not connected; when the second radar module is connected to the busbar connection module, the second path is connected and the first path is not connected.

[0068] Specifically, Figure 5 , 6 As shown, the first end 711 of the first circuit 710 includes RXD1 and TXD1 interfaces. The second end 712 of the first circuit 710 includes RXD2 and TXD2 interfaces. The third end 713 of the first circuit 710 includes RX and TX interfaces.

[0069] The first circuit 710 includes a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor and an eighth resistor.

[0070] The first path includes a first resistor R1, a second resistor R2, a third resistor R3, and a fourth resistor R4. Specifically, TXD1 and RXD1 of the busbar connection module 100 are connected to the MCU 300, and two ports of the MCU 300 are connected to the RXD2 and TXD2 interfaces of the second end 712 of the first circuit, and are connected to the wireless communication module 410 through the RX and TX interfaces of the third end 713 of the first circuit 710 after passing through the third resistor R3 and the fourth resistor R4, respectively.

[0071] One end of the third resistor R3 is connected to the RXD2 interface of the second end 712 and is connected to a voltage VCC via the second resistor R2 , and the other end is connected to the RX interface of the third end 713 via a node.

[0072] One end of the fourth resistor R4 is connected to the TXD2 interface of the second end 712 and connected to a voltage VCC via the first resistor, and the other end is connected to the TX interface of the third end 713 via a node. The voltage VCC is preferably 3V.

[0073] The second path includes a fifth resistor R5, a sixth circuit R6, a seventh resistor R7 and an eighth resistor R8. Specifically, TXD1 and RXD1 of the busbar connection module 100 are connected to the TXD1 and RXD1 interfaces of the first end 711 of the first circuit 710; after passing through the fifth resistor R5 and the sixth resistor R6, they are connected to the wireless communication module 410 through the RX and TX interfaces of the third end 713.

[0074] One end of the fifth resistor R5 is connected to the RXD1 interface of the first end 711 and is connected to a voltage VCC via the seventh resistor R7 , and the other end is connected to the RX interface of the third end 713 via a node.

[0075] One end of the sixth resistor R6 is connected to the TXD1 interface of the first end 711 and connected to a voltage VCC via the eighth resistor, and the other end is connected to the TX interface of the third end 713 via a node. The voltage VCC is preferably 3V.

[0076] The wireless communication module includes a WI FI module and / or a zigbee module.

[0077] When printing the PCB board, the millimeter-wave radar detection circuit of the embodiment of the present application first prints the circuit line on the substrate, and then assembles the electrical components. During assembly, the corresponding circuit structure is selected to assemble the corresponding components according to the needs of the manufacturer. For example, when the first radar module is connected to the mother-connecting module 100, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7 and the eighth resistor R8 are not assembled. When the second radar module is connected to the mother-connecting module 100, the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4 and the external MCU300 are not assembled. In this way, a corresponding circuit structure is formed, such as Figure 2 , 3 shown.

[0078] Among them, the second circuit 720 includes a first end 721, a second end 722, and a third end 723. The first contact 110 of the busbar connection module is connected to the external MCU 300, the external MCU 300 is connected to the second end 722 of the second circuit, and the third end 723 of the second circuit is connected to the 485 communication module 420 to form a first circuit; the first contact 110 of the busbar connection module is connected to the first end 721 of the second circuit, and the third end 723 of the second circuit is connected to the 485 communication module 420 to form a second circuit. When the first radar module is connected to the busbar connection module, the first circuit is connected and the second circuit is not connected; when the second radar module is connected to the busbar connection module, the second circuit is connected and the first circuit is not connected.

[0079] Specifically, Figure 5As shown, the third circuit includes three parallel branches, the first parallel branch includes a third-first resistor R31 and a third-second resistor R32 connected in series; the second parallel branch includes a fourth-first resistor R41 and a fourth-second resistor R42 connected in series; the third parallel branch includes a fifth-first resistor R51 and a fifth-second resistor R22 connected in series. A first output terminal is connected between R31 and R32, a second output terminal is connected between R41 and R42, and a third output terminal is connected between R51 and R52; the first, second, and third output terminals jointly form a third terminal 723 of the second circuit 720. One end of R31, one end of R41, and one end of R51 jointly form a second terminal 722 of the second circuit 720. One end of R32, one end of R42, and one end of R52 jointly form a first terminal 721 of the second circuit 720. Among them, one end of the R31 and one end of the R41 are respectively connected to the RXD2 and TXD2 interfaces of the external MCU 300, or directly connected to the RXD2 and TXD2 interfaces of the second end 712 of the first circuit; one end of R51 is connected to the control port on the external MCU 300. One end of the R32 and one end of the R42 are respectively connected to the RXD1 and TXD1 interfaces of the busbar connection module 100, or directly connected to the RXD1 and TXD1 interfaces of the first end 711 of the first circuit; one end of R52 is connected to the control port on the busbar connection module 100.

[0080] When printing the PCB board, the millimeter-wave radar detection circuit of the embodiment of the present application first prints the circuit circuit on the substrate, and then assembles the electrical components. During assembly, the corresponding circuit structure is selected to assemble the corresponding components according to the needs of the manufacturer. For example, when the first radar module is connected to the mother-connecting module 100, R32, R42, and R52 are not assembled. When the second radar module is connected to the mother-connecting module 100, R31, R41, R51, and the external MCU300 are not assembled. In this way, the corresponding circuit structure is formed, such as Figure 2 , 3 shown.

[0081] The female connector module further includes a third contact 130, which is connected to one end of the dry contact module 430; the other end of the dry contact module 430 is connected to the external MCU 300; when the female connector module is connected to the first radar module 500, the other end of the dry contact module 430 is connected to the external MCU 300, and the third contact 130 of the female connector module is not connected to one end of the dry contact module 430; when the female connector module is connected to the second radar module 600, the other end of the dry contact module 430 is not connected to the external MCU 300, and the third contact 130 of the female connector module is connected to one end of the dry contact module 430. A fourth circuit is also provided between the dry contact module 430 and the female connector module 100, and a resistor is provided on the fourth circuit, one end of which is connected to the third contact of the female connector module 100, and the other end is connected to the GJD interface of the dry contact module 430.

[0082] When printing the PCB board, the millimeter wave radar detection circuit of the embodiment of the present application first prints the circuit circuit on the substrate, and then assembles the electrical components. During assembly, the corresponding circuit structure is selected to assemble the corresponding components according to the needs of the manufacturer. For example, when the first radar module is connected to the busbar connection module 100, the components on the fourth circuit are not assembled. When the second radar module is connected to the busbar connection module 100, the external MCU 300 is not assembled. In this way, the corresponding circuit structure is formed, such as Figure 2 , 3 shown.

[0083] The present application also provides a printed circuit board, comprising the millimeter wave radar detection circuit of any one of the exemplary embodiments of the present application corresponding to the above embodiment, and the first radar module is mounted on the printed circuit board. Preferably, the first radar module is an R24FTT1 radar module.

[0084] The embodiment of the present application further provides a printed circuit board, comprising the millimeter wave radar detection circuit of any one of the exemplary embodiments of the present application corresponding to the above embodiment, and the second radar module is mounted on the printed circuit board. Preferably, the second radar module is an R24DVD1 radar module, which has a built-in MCU.

[0085] An embodiment of the present application further provides a millimeter wave radar detector, comprising a printed circuit board as described in any one of the exemplary implementations of the present application corresponding to the above-mentioned embodiment.

[0086] Those skilled in the art will appreciate that the embodiments of the present invention may be provided as a system or a computer program product. Therefore, the present invention may be in the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may be in the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0087] It should be understood that the embodiments of the present application are not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the embodiments of the present application is limited only by the appended claims.

[0088] The above-mentioned embodiments only express several implementation methods of the embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the embodiments of the present application, and these all belong to the protection scope of the embodiments of the present application.

Claims

1. A millimeter wave radar detection circuit, characterized in that: include: A female connector module comprises: a first contact (110) and a second contact (120); When the first radar module is connected to the busbar connection module, the millimeter wave radar detection circuit forms a first circuit structure; the first circuit structure comprises: a light sensing module, a communication module, the first radar module, and an external MCU (300) external to the first radar module; wherein the light sensing module is connected to the external MCU (300) to transmit the detected light signal to the external MCU; the first radar module is connected to the external MCU (300) via a first contact (110) of the busbar connection module to transmit the detected radar signal to the external MCU (300); the external MCU (300) is communicatively connected to the communication module; When the second radar module is connected to the busbar connection module, the millimeter-wave radar detection circuit forms a second circuit structure; the second circuit structure includes: the light sensing module, the communication module and the second radar module; the second radar module has a built-in MCU; wherein the light sensing module is connected to the second radar module through the second contact (120) of the busbar connection module to transmit the detected light signal to the second radar module; the second radar module is also used to detect radar signals; the second radar module is connected to the communication module through the first contact (110) of the busbar connection module.

2. The circuit according to claim 1, characterized in that The circuit also includes: A third circuit (730) comprising a first terminal, a second terminal, and a third terminal; The optical sensing module is connected to a first end of the third circuit (730), and a second end of the third circuit (730) is connected to a second contact (120) of the female connector module to form a first optical branch; The optical sensing module is connected to a first end of a third circuit (730), and a third end of the third circuit (730) is connected to the external MCU (300), so as to form a second optical branch; When the first radar module is connected to the busbar connection module, the first optical branch is disconnected and the second optical branch is connected; When the second radar module is connected to the busbar connection module, the second optical branch is disconnected and the first optical branch is connected.

3. The circuit according to claim 1, characterized in that: The communication module includes at least one of a wireless communication module, a 485 communication module, and a dry contact module.

4. The circuit according to claim 1, characterized in that: The communication module includes: a wireless communication module; The circuit also includes a first circuit (710), wherein the first circuit (710) includes a first terminal, a second terminal, and a third terminal; The first contact (110) of the busbar connection module is connected to the external MCU (300), the external MCU (300) is connected to the second end of the first circuit (710), and the third end of the first circuit (710) is connected to the wireless communication module to form a first path; The first contact (110) of the female connector module is connected to the first end of the first circuit (710), and the third end of the first circuit (710) is connected to the wireless communication module to form a second path; When the first radar module is connected to the female connector module, the first path is connected and the second path is disconnected; When the second radar module is connected to the female connector module, the second path is connected and the first path is disconnected.

5. The circuit according to claim 1, characterized in that: The communication module includes: 485 communication module; The circuit also includes a second circuit (720) including a first terminal, a second terminal, and a third terminal; The first contact (110) of the busbar connection module is connected to the external MCU (300), the external MCU (300) is connected to the second end of the second circuit (720), and the third end of the second circuit (720) is connected to the 485 communication module to form a first circuit; The first contact (110) of the female connector module is connected to the first end of the second circuit (720), and the third end of the second circuit (720) is connected to the 485 communication module to form a second circuit; When the first radar module is connected to the busbar connection module, the first circuit is connected and the second circuit is disconnected; When the second radar module is connected to the female connector module, the second circuit is connected and the first circuit is disconnected.

6. The circuit according to claim 1, characterized in that: The communication module includes: a dry contact module; The female connector module further comprises a third contact, wherein the third contact is connected to one end of the dry contact module; the other end of the dry contact module is connected to an external MCU (300); When the first radar module is connected to the busbar connection module, the other end of the dry contact module is connected to the external MCU (300), and the third contact of the busbar connection module is disconnected from one end of the dry contact module; When the second radar module is connected to the busbar connection module, the other end of the dry contact module is disconnected from the external MCU (300), and the third contact of the busbar connection module is connected to one end of the dry contact module.

7. A printed circuit board, characterized in that: It comprises the millimeter wave radar detection circuit as described in any one of claims 1 to 6; the first radar module is assembled on the printed circuit board.

8. A printed circuit board, characterized in that: The invention comprises the millimeter wave radar detection circuit as described in any one of claims 1 to 6; the second radar module is assembled on the printed circuit board.

9. A millimeter wave radar detector, characterized in that: A printed circuit board comprising the method according to claim 7 or 8.

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