Millimeter wave radar sensor capable of angle calibration

Abstract

The utility model discloses a millimeter wave radar sensor capable of angle calibration. The millimeter wave radar sensor comprises a housing and a main control board. A mounting cavity is formed in the shell, an antenna housing is arranged at one end of the shell, and a mounting part is arranged at one end, opposite to the antenna housing, of the shell; the main control board is installed in the installation cavity and is parallel to the antenna cover, the main control board is provided with a radar module and an acceleration sensor, the front end of the radar module is arranged towards the antenna cover, and the acceleration sensor is used for obtaining the angle direction of the shell. The millimeter wave radar sensor capable of angle calibration in the technical scheme of the utility model can improve the detection accuracy of the millimeter wave radar sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a millimeter wave radar sensor capable of angle calibration. Background Art

[0002] At present, millimeter-wave radar sensors can be used in many fields. For example, when used in elderly care, health care, and life care, they are mainly installed in various environments such as bedrooms, bathrooms, living rooms, or outdoor activity areas.

[0003] The detection space range of the millimeter-wave radar sensor is affected by the angle at which the millimeter-wave radar sensor shell is installed. When the millimeter-wave radar sensor shell is installed on the ceiling and the ceiling is not completely horizontal, the signal transmission and reception of the millimeter-wave radar sensor will be tilted at an angle, causing the detection space range of the millimeter-wave radar sensor to be not within the expected range, resulting in low detection accuracy and reduced detection range. Utility Model Content

[0004] The main purpose of the utility model is to provide a millimeter-wave radar sensor that can be angle-calibrated, aiming to improve the detection accuracy of the millimeter-wave radar sensor.

[0005] To achieve the above-mentioned purpose, the millimeter wave radar sensor capable of angle calibration proposed by the utility model comprises:

[0006] A housing, wherein a mounting cavity is provided inside the housing, an antenna cover is provided at one end of the housing, and a mounting portion is provided at one end of the housing facing away from the antenna cover; and

[0007] A main control board is installed in the installation cavity and parallel to the antenna cover. The main control board is provided with a radar module and an acceleration sensor. The front end of the radar module is arranged toward the antenna cover. The acceleration sensor is used to obtain the angular direction of the shell.

[0008] Optionally, the angle-calibrated millimeter-wave radar sensor also includes a mounting seat, a fixing portion is provided at one end of the mounting seat, and a matching portion is provided at the other opposite end, the fixing portion is used to be fixed to a ceiling or a wall, and the mounting portion is detachably mounted on the matching portion.

[0009] Optionally, the fixing portion is provided with an adhesive layer, and the adhesive layer is used for sticking to a ceiling or a wall.

[0010] Optionally, the angle-calibrable millimeter-wave radar sensor further includes a fixing screw, and the fixing part is fixed to a wall or a ceiling by the fixing screw.

[0011] Optionally, the matching portion is provided with a card slot, and the mounting portion is provided with a card connection protrusion matching the card slot, and the card connection protrusion is installed in the card slot.

[0012] Optionally, the shell is provided with a power interface and an indicator light, and the power interface and the indicator light are both connected to the main control board.

[0013] Optionally, the power interface and the indicator light are located on opposite sides of the shell.

[0014] Optionally, the power interface is a USB-C interface.

[0015] Optionally, a reset button is provided on the side of the shell, and the reset button is connected to the main control board.

[0016] Optionally, the reset button is made of a light-transmitting material, and an indicator light is provided inside the reset button.

[0017] The technical solution of the utility model is to set a mounting cavity in the shell, and set parallel antenna covers and mounting parts at the opposite ends of the shell respectively. A main control board parallel to the antenna cover is set in the mounting cavity. The main control board is provided with a radar module and an acceleration sensor. The front end of the radar module is set toward the antenna cover, and the acceleration sensor is used to obtain the angle direction of the radar antenna cover. Among them, the mounting part is used to be installed on the ceiling above the position to be detected. After such installation, the radar signal emitted by the radar module propagates to the detected position after passing through the antenna cover, and then is blocked and reflected by the object or human body in the detected position. The reflected radar signal is captured by the radar module after passing through the antenna cover. The millimeter-wave radar sensor with angle calibration can determine the distance, speed and angle of the person or object at the detected position. When the ceiling on which the shell is installed is not completely horizontal, the radar signal emitted by the radar module is tilted relative to the object or human body in the detected position, and the radar signal captured and fed back by the radar module is tilted. At the same time, the correction software calculates and corrects the captured feedback radar signal according to the inclination angle of the shell based on the acceleration sensor, so that the angle-calibrated millimeter-wave radar sensor can obtain accurate distance, speed and angle information of people or objects, thereby improving the detection accuracy of the angle-calibrated millimeter-wave radar sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model 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 utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of an embodiment of the millimeter-wave radar sensor capable of angle calibration of the utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the housing being disassembled from the mounting base;

[0021] Figure 3 for Figure 2 Schematic diagram of the structure after the antenna cover is removed from the shell.

[0022] Description of Figure Numbers:

[0023] Label name Label name 10 case 20 Main control board 11 Radome 21 Radar module 12 Snap-on convex part 22 Accelerometer 13 Power interface 30 Mounting Seat 14 Indicator Lights 31 Matching Department 15 Reset button 32 Card slot

[0024] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0028] The utility model provides a millimeter wave radar sensor capable of angle calibration.

[0029] In the embodiment of the present utility model, Figures 1 to 3As shown, the angle-calibrated millimeter-wave radar sensor includes a shell 10 and a main control board 20. The shell 10 has an installation cavity inside, the shell 10 has an antenna cover 11, and the shell 10 has an installation portion at one end facing away from the antenna cover 11. The main control board 20 is installed in the installation cavity and is parallel to the antenna cover 11. The main control board 20 is provided with a radar module 21 and an acceleration sensor 22. The front end of the radar module 21 is arranged toward the antenna cover 11, and the acceleration sensor 22 is used to obtain the angular direction of the shell 10.

[0030] In this embodiment, the millimeter-wave radar sensor with angle calibration of the utility model is used to detect human activities in a house. When the millimeter-wave radar sensor with angle calibration is installed on the ceiling above the position to be detected, when the acceleration sensor 22 detects that the housing 10 is parallel to the horizontal direction, it means that the ceiling on which the millimeter-wave radar sensor with angle calibration is installed is completely horizontal. At this time, the radar signal of the radar module 21, after passing through the antenna cover 11, just covers the position to be detected, and can accurately detect the person to be detected.

[0031] The angle-calibrated millimeter-wave radar sensor in this embodiment has built-in correction software. When the angle-calibrated millimeter-wave radar sensor is installed on the ceiling above the position to be detected, when the acceleration sensor 22 detects that the housing 10 is tilted, it means that the ceiling is not completely horizontal. At this time, the radar signal of the radar module 21 is tilted toward the human body within the detection range after passing through the antenna cover 11. The radar signal received by the radar module 21 has a deviation. At the same time, the correction software corrects the received feedback radar signal according to the tilt angle of the housing 10 detected by the acceleration sensor 22. In this way, the calculation can obtain the correct distance, speed and angle information of the person or object.

[0032] The technical solution of the utility model is to set a mounting cavity in the shell 10, and set mutually parallel antenna covers 11 and mounting parts at opposite ends of the shell 10 respectively, and set a main control board 20 parallel to the antenna cover 11 in the mounting cavity. The main control board 20 is provided with a radar module 21 and an acceleration sensor 22. The front end of the radar module 21 is arranged toward the antenna cover 11, and the acceleration sensor 22 is used to obtain the angular direction of the radar antenna cover 11. Among them, the mounting part is used to be installed on the ceiling above the position to be detected. After such installation, the radar signal emitted by the radar module 21 passes through the antenna cover 11, propagates to the detected position, and then is blocked and reflected by the object or human body in the detected position. The reflected radar signal is captured by the radar module 21 after passing through the antenna cover 11, and the radar module 21 can determine the distance, speed and angle information of the person or object at the detected position. When the ceiling on which the shell 10 is installed is not completely horizontal, the radar signal emitted by the radar module 21 is tilted relative to the object or human body in the detected position, and the radar signal fed back captured by the radar module 21 is tilted. At the same time, the correction software calculates and corrects the captured feedback radar signal according to the acceleration sensor 22 according to the tilt angle of the shell 10, so that the angle-calibrated millimeter-wave radar sensor can obtain accurate distance, speed and angle information of people or objects, thereby improving the detection accuracy of the angle-calibrated millimeter-wave radar sensor.

[0033] In some embodiments, the angle-calibrated millimeter-wave radar sensor further includes a mounting base 30, one end of the mounting base 30 is provided with a fixing portion, and the other end opposite thereto is provided with a matching portion 31, the fixing portion is used to be fixed to the ceiling or the wall, and the housing 10 is detachably mounted on the matching portion 31. Specifically, during installation, the mounting base 30 is first mounted on the ceiling or the wall, and then the fixing portion is mounted on the matching portion 31, so that it is convenient to install and remove the housing 10, and when the parts in the housing 10 are damaged, the parts in the housing 10 can be conveniently repaired. In addition, in other embodiments, the housing 10 can also be directly fixed to the wall or the ceiling.

[0034] In some embodiments, the fixing portion is provided with an adhesive layer, and the adhesive layer is used to be attached to the ceiling or wall. Specifically, the adhesive layer is covered with a release paper. When the mounting base 30 is to be fixed to the ceiling or wall, the release paper of the adhesive layer is torn off, and then the fixing portion can be attached to the ceiling or wall, which is more convenient. Compared with fixing the mounting base 30 by screws or nails, this does not need to damage the ceiling or wall.

[0035] In some embodiments, the angle-calibrated millimeter-wave radar sensor further includes a fixing screw, and the fixing portion is fixed to the wall or ceiling by the fixing screw. Specifically, during installation, the screw passes through the mounting base 30 and is fixed to the ceiling or wall to fix the mounting base 30. Compared with gluing the mounting base 30 to the ceiling or wall, this screw fixing method is more stable and reliable.

[0036] In some embodiments, the matching portion 31 is provided with a card slot 32, the mounting portion is provided with a card connection protrusion 12 matching the card slot 32, and the card connection protrusion 12 is installed in the card slot 32. Specifically, the card connection structure of such card connection installation is convenient to install and disassemble, and the structures of the card slot 32 and the card connection protrusion 12 are also simple.

[0037] In some embodiments, the housing 10 is provided with a power interface 13 and an indicator light 14, both of which are connected to the main control board 20. Specifically, the power interface 13 can be connected to a power source to power the angle-calibrated millimeter-wave radar sensor, and the indicator light 14 can prompt the user by lighting up or lighting up different colors of lights.

[0038] In some embodiments, the power interface 13 and the indicator light 14 are located on opposite sides of the housing 10. Specifically, after the power interface 13 is connected to the power cord, the power cord is located on a side away from the indicator light 14, so that the user will not be disturbed from viewing the indicator light 14.

[0039] In some embodiments, the power interface 13 is a USB-C interface. Specifically, the power interface 13 can be connected to the power source through an electrical connection line with a USB-C connector, and the electrical connection line with a USB-C connector is widely used. When the electrical connection line connected to the power interface 13 is damaged, it is easy to find a replacement electrical connection line.

[0040] In some embodiments, a reset button 15 is provided on the side of the housing 10, and the reset button 15 is connected to the main control board 20. Specifically, the reset mounting member is provided on the side of the housing 10, so that the operation is more convenient when resetting.

[0041] In some embodiments, the reset button 15 is made of a light-transmitting material, and an indicator light 14 is provided inside the reset button 15. Specifically, the reset button 15 and the indicator light 14 are integrated, so that the structure of the angle-calibrated millimeter-wave radar sensor is simpler, the assembly is more convenient, and the user is also simpler to use.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A millimeter-wave radar sensor capable of angle calibration, characterized in that: include: A housing, wherein a mounting cavity is provided inside the housing, an antenna cover is provided at one end of the housing, and a mounting portion is provided at one end of the housing facing away from the antenna cover; as well as A main control board is installed in the installation cavity and parallel to the antenna cover. The main control board is provided with a radar module and an acceleration sensor. The front end of the radar module is arranged toward the antenna cover. The acceleration sensor is used to obtain the angular direction of the shell.

2. The angle-calibrated millimeter-wave radar sensor according to claim 1, characterized in that: The angle-calibrated millimeter-wave radar sensor also includes a mounting seat, one end of the mounting seat is provided with a fixing portion, and the other end opposite thereto is provided with a matching portion, the fixing portion is used to be fixed to a ceiling or a wall, and the mounting portion is detachably mounted on the matching portion.

3. The angle-calibrated millimeter-wave radar sensor according to claim 2, characterized in that: The fixing portion is provided with an adhesive layer, and the adhesive layer is used for sticking to the ceiling or the wall.

4. The angle-calibrated millimeter-wave radar sensor according to claim 2, characterized in that: The angle-calibrable millimeter-wave radar sensor further includes a fixing screw, and the fixing part is fixed to a wall or a ceiling by the fixing screw.

5. The angle-calibrated millimeter-wave radar sensor according to claim 2, characterized in that: The matching portion is provided with a card slot, and the mounting portion is provided with a card connection protrusion matching the card slot, and the card connection protrusion is installed in the card slot.

6. The angle-calibrated millimeter-wave radar sensor according to claim 1, characterized in that: The shell is provided with a power interface and an indicator light, and both the power interface and the indicator light are connected to the main control board.

7. The angle-calibrated millimeter-wave radar sensor according to claim 6, characterized in that: The power interface and the indicator light are located on opposite sides of the housing.

8. The angle-calibrated millimeter-wave radar sensor according to claim 6, characterized in that: The power interface is a USB-C interface.

9. The angle-calibrated millimeter-wave radar sensor according to claim 1, characterized in that: A reset button is disposed on the side of the shell, and the reset button is connected to the main control board.

10. The angle-calibrated millimeter-wave radar sensor according to claim 9, characterized in that: The reset button is made of a light-transmitting material and an indicator light is arranged inside the reset button.

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