A method for testing and adjusting a doppler radar sensing matrix
By performing performance testing and parameter adjustment on the Doppler radar sensing matrix, the problems of co-frequency interference and radar echo signal blocking were solved, achieving stable detection results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- FOSHAN ELECTRICAL & LIGHTING
- Filing Date
- 2023-02-13
- Publication Date
- 2026-05-19
AI Technical Summary
Doppler radar sensing matrices are prone to interference at the same frequency and radar echo signal blockage during use, which affects the detection effect.
By performing basic performance testing on the Doppler radar sensing matrix and replacing non-compliant sensors, co-frequency interference and radar echo signal blocking detection were performed, and parameters of non-compliant sensors were adjusted, including transmission power and sensitivity.
This effectively reduces false triggering and missed triggering in the Doppler radar sensing matrix, ensuring that the radar matrix operates in a stable state when detecting personnel movement.
Smart Images
Figure CN116165616B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of testing technology, specifically to a method for testing and adjusting a Doppler radar sensing matrix. Background Technology
[0002] When a Doppler radar sensing matrix is put into use, two main types of interference phenomena occur. One is the interference at the same frequency between a single Doppler radar sensor and other Doppler radar sensors. The other is the blocking of radar echo signals that need to be received by other single Doppler radar sensors by radar signals of the same frequency band generated by multiple Doppler radar sensors. How to solve the above two interference phenomena that occur when a Doppler radar sensing matrix is put into use is the technical problem that this invention needs to solve. Summary of the Invention
[0003] This invention provides a method for testing and adjusting a Doppler radar sensing matrix to solve one or more technical problems existing in the prior art, and at least provides a beneficial option or creates conditions.
[0004] This invention provides a method for testing and adjusting a Doppler radar sensing matrix, wherein the Doppler radar sensing matrix is composed of a plurality of Doppler radar sensors, and the method includes:
[0005] The Doppler radar sensing matrix is subjected to basic performance testing, and any Doppler radar sensors that do not meet the performance requirements are replaced until the Doppler radar sensing matrix meets the performance requirements.
[0006] When the Doppler radar sensing matrix meets the performance requirements, the Doppler radar sensing matrix is subjected to co-frequency interference detection, and the parameters of the Doppler radar sensors that do not meet the anti-interference requirements are adjusted until the Doppler radar sensing matrix is free from co-frequency interference.
[0007] When the Doppler radar sensing matrix meets the performance requirements, radar echo signal blocking detection is performed on the Doppler radar sensing matrix, and the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements are adjusted until there is no radar echo signal blocking in the Doppler radar sensing matrix.
[0008] Furthermore, the method also includes:
[0009] A first plane and a second plane are arranged parallel to each other. The first plane allows all radar antennas of the Doppler radar sensing matrix to be set up, and the second plane allows test personnel to move around.
[0010] Furthermore, the step of performing co-frequency interference detection on the Doppler radar sensing matrix and adjusting the parameters of Doppler radar sensors that do not meet the anti-interference requirements until the Doppler radar sensing matrix is free from co-frequency interference includes the following steps:
[0011] S11. Obtain the single Doppler radar sensor to be tested, and only disable the transmission function of the single Doppler radar sensor;
[0012] S12. When the tester moves within the sensing range of the Doppler radar sensing matrix, determine whether the single Doppler radar sensor is triggered; if not, proceed to step S13; if yes, proceed to step S14.
[0013] S13. Determine whether there are still Doppler radar sensors to be tested in the Doppler radar sensing matrix; if yes, return to step S11; if no, complete the co-frequency interference detection of the Doppler radar sensing matrix.
[0014] S14. Only enable the transmission function of the single Doppler radar sensor. When the tester moves within the sensing range of the Doppler radar sensing matrix, obtain all Doppler radar sensors in the Doppler radar sensing matrix that are also triggered by sensing, in addition to the single Doppler radar sensor. Reduce the current transmission power of all Doppler radar sensors according to the first step length, and then repeat step S11 for the single Doppler radar sensor.
[0015] Furthermore, the step of performing radar echo signal blocking detection on the Doppler radar sensing matrix and adjusting the parameters of Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking includes the following steps:
[0016] S21. When the tester moves within the sensing range of the Doppler radar sensing matrix, determine whether each Doppler radar sensor in the Doppler radar sensing matrix has been triggered. If yes, complete the radar echo signal blocking detection of the Doppler radar sensing matrix. If no, acquire all Doppler radar sensors that have failed to be triggered, and then execute step S22.
[0017] S22. Determine whether the number of all Doppler radar sensors is greater than or equal to a predetermined threshold. If yes, reduce the current transmission power of all Doppler radar sensors according to the first step length, and then return to step S21. If no, increase the current sensitivity of each Doppler radar sensor according to the second step length until it is triggered when the tester moves within the sensing range of the Doppler radar sensing matrix, thus completing the radar echo signal blocking detection of the Doppler radar sensing matrix.
[0018] Furthermore, the second plane is provided with eight test directions connected to the same intersection point, and each test direction is provided with a first test point and a second test point. The distance between the first test point and the intersection point is less than the distance between the second test point and the intersection point.
[0019] Further, the center point of the Doppler radar sensing matrix is located in the vertical direction of the intersection point; the step of performing radar echo signal blocking detection on the Doppler radar sensing matrix and adjusting the parameters of Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking includes:
[0020] When the tester moves at the eight first test points, a radar echo signal blocking detection is performed on the Doppler radar sensing matrix, and the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements are adjusted until there is no radar echo signal blocking in the Doppler radar sensing matrix.
[0021] As the tester moves between the eight second test points, another radar echo signal blocking test is performed on the Doppler radar sensing matrix, and the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements are adjusted until the Doppler radar sensing matrix is free from radar echo signal blocking.
[0022] Furthermore, the step of performing a radar echo signal blocking detection on the Doppler radar sensing matrix when the tester moves at the eight first test points, and adjusting the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking, includes the following steps:
[0023] S31. When the tester moves at each first test point, determine whether each Doppler radar sensor in the Doppler radar sensing matrix has been triggered; if yes, complete one radar echo signal blocking detection of the Doppler radar sensing matrix; if no, obtain all Doppler radar sensors that failed to be triggered at at least one first test point, and then execute step S32.
[0024] S32. Determine whether the number of all Doppler radar sensors is greater than or equal to a predetermined threshold; if yes, reduce the current transmission power of all Doppler radar sensors according to the first step length, and then return to execute step S31; if no, increase the current sensitivity of each Doppler radar sensor according to the second step length until it is triggered when the tester moves at each first test point, thus completing one radar echo signal blocking detection of the Doppler radar sensing matrix.
[0025] Furthermore, the step of performing another radar echo signal blocking detection on the Doppler radar sensing matrix while the tester moves at the eight second test points, and adjusting the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking, includes the following steps:
[0026] S41. When the tester moves at each second test point, determine whether each Doppler radar sensor in the Doppler radar sensing matrix has been triggered. If yes, complete another radar echo signal blocking detection of the Doppler radar sensing matrix. If no, obtain all Doppler radar sensors that failed to be triggered at at least one second test point, and then execute step S42.
[0027] S42. Determine whether the number of all Doppler radar sensors is greater than or equal to a predetermined threshold. If yes, reduce the current transmission power of all Doppler radar sensors according to the first step length, and then return to execute step S41. If no, increase the current sensitivity of each Doppler radar sensor according to the second step length until it is triggered when the tester moves at each second test point, thus completing another radar echo signal blocking detection of the Doppler radar sensing matrix.
[0028] Furthermore, the step of performing basic performance testing on the Doppler radar sensing matrix and replacing any Doppler radar sensors that do not meet performance requirements until the Doppler radar sensing matrix meets performance requirements includes:
[0029] S51. Obtain the single Doppler radar sensor to be tested, and position the center point of its antenna in the vertical direction of the intersection.
[0030] S52. When the tester moves at each first test point and second test point, determine whether the individual Doppler radar sensor can be triggered; if not, proceed to step S53; if yes, proceed to step S54.
[0031] S53. Replace the single Doppler radar sensor and position the center point of its antenna in the vertical direction of the intersection point, then return to step S52.
[0032] S54. Determine whether there are still Doppler radar sensors to be tested in the Doppler radar sensing matrix; if yes, return to step S51; if no, complete the basic performance test of the Doppler radar sensing matrix.
[0033] Furthermore, the distance between the first test point and the intersection is not less than 2 meters, and the distance between the second test point and the intersection is not less than 4 meters.
[0034] Furthermore, the distance between the first plane and the second plane is 2.5 meters.
[0035] Furthermore, in the Doppler radar sensing matrix, the distance between any two adjacent Doppler radar sensors is 15 centimeters.
[0036] This invention has at least the following beneficial effects: By performing co-frequency interference detection on the Doppler radar sensing matrix, and adjusting the transmission power of the associated Doppler radar sensors when the detection fails, false triggering in the Doppler radar sensing matrix can be effectively reduced; by performing radar echo signal blocking detection on the Doppler radar sensing matrix, and adjusting the transmission power or sensitivity of the associated Doppler radar sensors when the detection fails, missed triggering in the Doppler radar sensing matrix can be effectively reduced. This invention enables the Doppler radar sensing matrix to operate in a stable state when it detects personnel movement. Attached Figure Description
[0037] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the technical solutions of the present invention, and do not constitute a limitation on the technical solutions of the present invention.
[0038] Figure 1 This is a flowchart illustrating a method for testing and adjusting a Doppler radar sensing matrix according to an embodiment of the present invention.
[0039] Figure 2 This is a schematic diagram showing the arrangement position between the first plane and the second plane in an embodiment of the present invention;
[0040] Figure 3 This is a flowchart illustrating a test and adjustment method for a Doppler radar sensing matrix in another embodiment of the invention. Detailed Implementation
[0041] To make the objectives, technical solutions, and advantages of this invention clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this application and are not intended to limit this application.
[0042] It should be noted that although functional modules are divided in the device schematic diagram and a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first," "second," etc., in the specification, claims, and the aforementioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.
[0044] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.
[0045] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily need to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.
[0046] Because microwave radar sensing technology can penetrate non-metallic objects, Doppler radar sensors are typically integrated into ordinary lighting fixtures to form Doppler radar-sensing lights. These lights activate when a person is detected approaching, and their sensing range can reach 8-10 meters, without needing to consider seasonal adaptability. However, when a project requires the installation of a large number of Doppler radar-sensing lights with a high installation density, the study of the physical characteristics of the Doppler radar sensing matrix becomes significant.
[0047] Please refer to Figure 1 , Figure 1This is a flowchart illustrating a method for testing and adjusting a Doppler radar sensing matrix according to an embodiment of the present invention. The method includes the following:
[0048] Step S110: Deploy a first plane and a second plane that are parallel to each other. The first plane allows all radar antennas of the Doppler radar sensing matrix to be installed, and the second plane allows test personnel to move.
[0049] Step S120: Perform basic performance testing on the Doppler radar sensing matrix and replace any Doppler radar sensors that do not meet the performance requirements until the Doppler radar sensing matrix meets the performance requirements.
[0050] Step S130: Perform co-frequency interference detection on the Doppler radar sensing matrix, and adjust the parameters of the Doppler radar sensors that do not meet the anti-interference requirements until the Doppler radar sensing matrix is free from co-frequency interference.
[0051] Step S140: Perform radar echo signal blocking detection on the Doppler radar sensing matrix, and adjust the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements until there is no radar echo signal blocking on the Doppler radar sensing matrix.
[0052] In this embodiment of the invention, the number of Doppler radar sensors contained within the Doppler radar sensing matrix is set to 81. The 81 Doppler radar sensors are arranged in a 9x9 grid to form the Doppler radar sensing matrix, and the installation positions of any two adjacent Doppler radar sensors are 15 cm apart. That is, any one of the Doppler radar sensors is defined as the first Doppler radar sensor, and at most four Doppler radar sensors are each 15 cm away from the first Doppler radar sensor. The four Doppler radar sensors are respectively the Doppler radar sensor arranged above the first Doppler radar sensor, the Doppler radar sensor arranged below the first Doppler radar sensor, the Doppler radar sensor arranged to the left of the first Doppler radar sensor, and the Doppler radar sensor arranged to the right of the first Doppler radar sensor.
[0053] In step S110 above, the first plane is positioned relative to the second plane, such as... Figure 2 As shown, the relative distance between them is set to 2.5 meters, and the second plane is set to coincide with the ground plane. Additionally, it should be noted that the radar antenna of the Doppler radar sensing matrix can be a planar radar antenna; this invention does not limit this.
[0054] In this embodiment of the invention, to facilitate comprehensive testing of the physical characteristics of the Doppler radar sensing matrix, eight test directions are set on the second plane mentioned in step S110 above, such as... Figure 2 As shown, the eight test directions are all derived from the same intersection point as the starting point and extend outwards at a certain angle. Simultaneously, a first test point and a second test point are set in each test direction according to predetermined distance requirements. These predetermined distance requirements are: the distance between the first test point and the intersection point is less than the distance between the second test point and the intersection point; furthermore, the distance between the first test point and the intersection point should be greater than or equal to 2 meters, and the distance between the second test point and the intersection point should be greater than or equal to 4 meters. Additionally, it should be noted that the angle between two adjacent test directions can be set according to actual requirements, for example, the angle between two adjacent test directions can both be 45°; this invention does not impose any limitation on this.
[0055] In this embodiment of the invention, since eight test directions are arranged on the second plane, and two test points are evenly distributed in each test direction (the first test point and the second test point are collectively referred to as test points), the specific implementation process of the above step S120 includes the following:
[0056] Step S120.1: Obtain the i-th Doppler radar sensor from the Doppler radar sensing matrix;
[0057] Step S120.2: Before starting the test, set the center point of the antenna of the i-th Doppler radar sensor to be on the same vertical line as the intersection point on the second plane, and set the radar antenna of the i-th Doppler radar sensor on the first plane and facing the second plane to sense the movement of the tester.
[0058] Step S120.3: Guide the tester to move at the k-th test point, and then determine whether the i-th Doppler radar sensor can generate a sensing trigger result; if yes, proceed to step S120.4; if no, directly determine that the i-th Doppler radar sensor does not have qualified basic performance, and then proceed to step S120.5.
[0059] Step S120.4: Determine whether k < 16 is true; if yes, assign k+1 to k and return to step S120.3 above; if no, it can be determined that the i-th Doppler radar sensor has qualified basic performance, and then step S120.6 is executed.
[0060] Step S120.5: Replace the i-th Doppler radar sensor to obtain a new i-th Doppler radar sensor, and then return to execute the above step S120.2;
[0061] Step S120.6: Determine whether i < 81 is true; if yes, assign i + 1 to i and then return to execute step S120.1 above; if no, end the current basic performance test task.
[0062] Among them, step S120.1 is executed starting from i=1, and step S120.3 is executed starting from k=1.
[0063] It should be noted that when performing step S120.1 above, the basic performance test can be performed by only enabling the transmission and reception functions of the i-th Doppler radar sensor, while disabling the transmission and reception functions of the other 80 Doppler radar sensors; of course, the i-th Doppler radar sensor can also be removed separately to perform the basic performance test.
[0064] When the Doppler radar sensing matrix is integrated into a general lighting fixture and put into use, the close installation distance between two adjacent Doppler radar sensors leads to significant co-frequency interference on the Doppler radar sensing matrix. This is a very important problem that must be solved. Co-frequency interference refers to the phenomenon where any Doppler radar sensor on the Doppler radar sensing matrix receives radar echo signals generated after the radar signals emitted by other Doppler radar sensors are reflected by objects, resulting in erroneous sensing triggering results.
[0065] Of course, some researchers have proposed that the various Doppler radar sensors on the Doppler radar sensing matrix can operate at different frequencies within the same frequency band, so that the receiving filter inside any Doppler radar sensor can autonomously filter out radar echo signals that exceed a reasonable Doppler frequency range, ensuring that only the radar echo signals generated after the radar signal it emits is reflected by an object are received and responded to. However, when a large number of Doppler radar sensors are set on the Doppler radar sensing matrix, it is still difficult to guarantee that no two or more Doppler radar sensors will operate at the same frequency. In this regard, the present invention proposes to implement the above step S130 to solve this co-frequency interference phenomenon.
[0066] In this embodiment of the invention, the specific implementation process of step S130 includes the following:
[0067] Step S131: Obtain the i-th Doppler radar sensor from the Doppler radar sensing matrix;
[0068] Step S132: Turn off the transmission function of the i-th Doppler radar sensor, and turn on the transmission function of the other 80 Doppler radar sensors.
[0069] Step S133: Guide the tester to move within the entire sensing range defined by the Doppler radar sensing matrix, and determine whether the i-th Doppler radar sensor can generate a sensing trigger result; if yes, it indicates that the i-th Doppler radar sensor has experienced co-frequency interference, and proceed to step S134; if no, it indicates that the i-th Doppler radar sensor has not experienced co-frequency interference, and proceed to step S137.
[0070] Step S134: Enable the transmission function of the i-th Doppler radar sensor, and disable the transmission function of the other 80 Doppler radar sensors.
[0071] Step S135: Guide the tester to move within the entire sensing range defined by the Doppler radar sensing matrix, and obtain the N1 Doppler radar sensors that currently generate the sensing trigger result from the other 80 Doppler radar sensors.
[0072] Step S136: Since the technician has set an appropriate first step length in advance based on the initial transmission power of any Doppler radar sensor, the current transmission power of the N1 Doppler radar sensors is simultaneously reduced according to the first step length, and then the process returns to execute the above step S132.
[0073] Step S137: Determine whether i < 81 is true; if yes, assign i + 1 to i and return to execute step S131 above; if no, end the current co-frequency interference detection task.
[0074] Among them, the above step S131 is executed starting from i=1.
[0075] It should be noted that before each execution of step S131 above, it is necessary to ensure that the transmission and reception functions of the 81 Doppler radar sensors are enabled.
[0076] Since all 81 Doppler radar sensors belong to the same model, although each Doppler radar sensor can be configured to transmit radar signals at different frequencies, the Doppler frequency range used by the transmitting filter and the receiving filter of each Doppler radar sensor are the same. When multiple Doppler radar sensors work simultaneously, they are all transmitting radar signals in the same frequency band. This can easily cause the radar echo signal generated by the radar signal originally transmitted by a certain Doppler radar sensor after reflection by an object to be submerged in these radar signals in the same frequency band. As a result, the Doppler radar sensor cannot generate the correct sensing trigger result because the radar echo signal it finally receives becomes weak. In other words, the detection sensitivity of the Doppler radar sensor is severely weakened. To address this, this embodiment of the invention proposes to implement the above step S130 to solve this radar echo signal blocking phenomenon.
[0077] In this embodiment of the invention, the specific implementation process of step S140 includes the following:
[0078] Step S141: Guide the tester to move within the entire sensing range defined by the Doppler radar sensing matrix and determine whether each Doppler radar sensor can generate a sensing trigger result; if yes, end the current radar echo signal blocking detection task; if no, acquire N2 Doppler radar sensors that cannot generate a sensing trigger result and continue to execute step S142.
[0079] Step S142: Based on the predetermined threshold set by the technician, determine whether N2 is greater than or equal to the predetermined threshold; if yes, it means that the signal in the same frequency band is too strong, and proceed to step S143; if no, proceed to step S144.
[0080] Step S143: According to the first step, simultaneously reduce the current transmission power of the N2 Doppler radar sensors, and then return to execute the above step S141;
[0081] Step S144: Since the technician has set an appropriate second step length in advance based on the initial sensitivity of any one of the Doppler radar sensors, the current sensitivity of each of the N2 Doppler radar sensors is continuously increased according to the second step length, so that it can generate a sensing trigger result when the tester moves within the entire sensing range defined by the Doppler radar sensing matrix. At this time, the current radar echo signal blocking detection task ends.
[0082] In this embodiment of the invention, when eight test directions are arranged within the entire sensing range defined by the Doppler radar sensing matrix, and a first test point and a second test point are arranged in each test direction, another specific implementation of the above step S140 includes the following:
[0083] Step S140.1: Set the center point of the Doppler radar sensing matrix and the intersection point on the second plane to be on the same vertical line, and set all the radar antennas of the Doppler radar sensing matrix on the first plane and facing the second plane to sense the movement of the test personnel;
[0084] Step S140.2: Guide the test personnel to move at eight first test points, perform a radar echo signal blocking detection on the Doppler radar sensing matrix, and then adjust the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements so that the Doppler radar sensing matrix does not experience radar echo signal blocking.
[0085] Step S140.3: Guide the test personnel to move at eight second test points to perform another radar echo signal blocking detection on the Doppler radar sensing matrix, and then perform parameter adjustment on the Doppler radar sensors that do not meet the anti-blocking requirements so that the Doppler radar sensing matrix does not experience radar echo signal blocking.
[0086] It should be noted that before performing steps S140.2 and S140.3, the transmission and reception functions of the 81 Doppler radar sensors should be activated first. In addition, the present invention does not limit the order in which steps S140.2 and S140.3 are executed.
[0087] More specifically, step S140.2 above can be further explained as follows:
[0088] Step S140.2.1: Guide the tester to move at the first test point in the j-th test direction, and obtain the M1 Doppler radar sensors that have failed to generate a sensing trigger result from the Doppler radar sensing matrix to form the corresponding j-th detection set;
[0089] Step S140.2.2: Determine if j < 8 is true; if yes, assign j + 1 to j and return to execute step S140.2.1 above; if no, obtain the corresponding set of 8 detections and then execute step S140.2.3.
[0090] Step S140.2.3: Determine whether the 8 detection sets obtained through step S140.2.2 are all empty sets; if yes, end the current radar echo signal blocking detection task; if no, merge and remove duplicates from the 8 detection sets to obtain K1 Doppler radar sensors.
[0091] Step S140.2.4: Determine whether K1 is greater than or equal to the predetermined threshold; if yes, it means that the signal in the same frequency band is too strong, and proceed to step S140.2.5; if no, proceed to step S140.2.6.
[0092] Step S140.2.5: According to the first step, simultaneously reduce the current transmission power of the K1 Doppler radar sensors, and return to execute the above step S140.2.1;
[0093] Step S140.2.6: Adjust the current sensitivity of each of the K1 Doppler radar sensors according to the second step length so that it can generate a sensing trigger result when the tester moves at the first test point in each test direction. At this time, the current radar echo signal blocking detection ends.
[0094] Among them, step S140.2.1 is executed starting from j=1.
[0095] More specifically, step S140.3 above can be further explained as follows:
[0096] Step S140.3.1: Guide the tester to move at the second test point in the j-th test direction, and obtain the M2 Doppler radar sensors that have failed to generate a sensing trigger result from the Doppler radar sensing matrix to form the corresponding j-th detection set;
[0097] Step S140.3.2: Determine whether j < 8 is true; if yes, assign j + 1 to j and return to execute step S140.3.1 above; if no, obtain the corresponding set of 8 detections and then execute step S140.3.3.
[0098] Step S140.3.3: Determine whether the 8 detection sets obtained through step S140.3.2 are all empty sets; if yes, end the current radar echo signal blocking detection task; if no, merge and remove duplicates from the 8 detection sets to obtain K2 Doppler radar sensors.
[0099] Step S140.3.4: Determine whether K2 is greater than or equal to the predetermined threshold; if yes, it means that the signal in the same frequency band is too strong, and proceed to step S140.3.5; if no, proceed to step S140.3.6.
[0100] Step S140.3.5: According to the first step, simultaneously reduce the current transmission power of the K2 Doppler radar sensors, and return to execute the above step S140.3.1;
[0101] Step S140.3.6: Adjust the current sensitivity of each of the K2 Doppler radar sensors according to the second step length so that it can generate a sensing trigger result when the tester moves at the second test point in each test direction. At this time, the current radar echo signal blocking detection ends.
[0102] Among them, step S140.3.1 is executed starting from j=1.
[0103] In this embodiment of the invention, since the relative distance between the first plane and the second plane is 2.5 meters, it is assumed that the tester's height is about 1.7 meters and the weight is about 120 kilograms, and the speed range of the tester when moving on the second plane is 1-3 meters per second.
[0104] In this embodiment of the invention, by performing co-frequency interference detection on the Doppler radar sensing matrix and adjusting the transmission power of the associated Doppler radar sensors when the detection fails, false triggering in the Doppler radar sensing matrix can be effectively reduced. Similarly, by performing radar echo signal blocking detection on the Doppler radar sensing matrix and adjusting the transmission power or sensitivity of the associated Doppler radar sensors when the detection fails, missed triggering in the Doppler radar sensing matrix can be effectively reduced. In other words, this invention enables the Doppler radar sensing matrix to operate in a stable state when it detects personnel movement.
[0105] Please refer to Figure 3 , Figure 3 This is a flowchart illustrating a test and adjustment method for a Doppler radar sensing matrix according to another embodiment of the invention. The method includes the following:
[0106] Step S210: Deploy a first plane and a second plane that are parallel to each other. The first plane allows all radar antennas of the Doppler radar sensing matrix to be installed, and the second plane allows test personnel to move.
[0107] Step S220: Perform basic performance testing on the Doppler radar sensing matrix and replace any Doppler radar sensors that do not meet the performance requirements until the Doppler radar sensing matrix meets the performance requirements.
[0108] Step S230: Perform radar echo signal blocking detection on the Doppler radar sensing matrix, and adjust the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements until there is no radar echo signal blocking on the Doppler radar sensing matrix.
[0109] Step S240: Perform co-frequency interference detection on the Doppler radar sensing matrix, and adjust the parameters of the Doppler radar sensors that do not meet the anti-interference requirements until the Doppler radar sensing matrix is free from co-frequency interference.
[0110] In this embodiment of the invention, the Doppler radar sensing matrix contains 81 Doppler radar sensors. These 81 sensors are arranged in a 9x9 grid to form the Doppler radar sensing matrix, with adjacent sensors spaced 15 cm apart. Specifically, any one Doppler radar sensor in the matrix is defined as the first Doppler radar sensor. At most four Doppler radar sensors are positioned 15 cm apart from the first Doppler radar sensor. These four sensors are: the one immediately above the first Doppler radar sensor, the one immediately below the first Doppler radar sensor, the one immediately to the left of the first Doppler radar sensor, and the one immediately to the right of the first Doppler radar sensor.
[0111] In step S210 above, the first plane is positioned relative to the second plane, such as... Figure 2 As shown, the relative distance between them is set to 2.5 meters, and the second plane is set to coincide with the ground plane. Additionally, it should be noted that the radar antenna of the Doppler radar sensing matrix can be a planar radar antenna; this invention does not limit this.
[0112] In this embodiment of the invention, to facilitate comprehensive testing of the physical characteristics of the Doppler radar sensing matrix, eight test directions are set on the second plane mentioned in step S210 above, such as... Figure 2As shown, the eight test directions are all derived from the same intersection point as the starting point and extend outward at a certain angle. Simultaneously, a first test point and a second test point are set according to predetermined distance requirements in each test direction. These predetermined distance requirements are: the first test point should be at least 2 meters away from the intersection point, and the second test point should be at least 4 meters away from the intersection point. Furthermore, it should be noted that the angle between two adjacent test directions can be set according to actual requirements; for example, the angle between two adjacent test directions can both be 45°. This invention does not impose any limitation on this.
[0113] In this embodiment of the invention, since eight test directions are arranged on the second plane, and two test points are evenly distributed in each test direction (the first test point and the second test point are collectively referred to as test points), the specific implementation process of the above step S220 includes the following:
[0114] Step S220.1: Obtain the i-th Doppler radar sensor from the Doppler radar sensing matrix;
[0115] Step S220.2: Before starting the test, set the center point of the i-th Doppler radar sensor and the intersection point on the second plane to be on the same vertical line, and set the radar antenna of the i-th Doppler radar sensor on the first plane and facing the second plane to sense the movement of the tester.
[0116] Step S220.3: Guide the tester to move at the k-th test point, and then determine whether the i-th Doppler radar sensor can generate a sensing trigger result; if yes, proceed to step S220.4; if no, directly determine that the i-th Doppler radar sensor does not have qualified basic performance, and then proceed to step S220.5.
[0117] Step S220.4: Determine whether k < 16 is true; if yes, assign k+1 to k and return to step S220.3 above; if no, it can be determined that the i-th Doppler radar sensor has qualified basic performance, and then step S220.6 above is executed.
[0118] Step S220.5: Replace the i-th Doppler radar sensor to obtain a new i-th Doppler radar sensor, and then return to execute the above step S220.2;
[0119] Step S220.6: Determine whether i < 81 is true; if yes, assign i + 1 to i and then return to execute step S220.1 above; if no, end the current basic performance test task.
[0120] Among them, step S220.1 is executed starting from i=1, and step S220.3 is executed starting from k=1.
[0121] It should be noted that when performing step S220.1 above, the basic performance test can be performed by only enabling the transmission and reception functions of the i-th Doppler radar sensor, while disabling the transmission and reception functions of the other 80 Doppler radar sensors; of course, the i-th Doppler radar sensor can also be removed individually to perform the basic performance test.
[0122] In this embodiment of the invention, the specific implementation process of step S230 includes the following:
[0123] Step S231: Guide the tester to move within the entire sensing range defined by the Doppler radar sensing matrix and determine whether each Doppler radar sensor can generate a sensing trigger result; if yes, end the current radar echo signal blocking detection task; if no, acquire N1 Doppler radar sensors that cannot generate a sensing trigger result and continue to execute step S232.
[0124] Step S232: Based on the predetermined threshold set by the technician, determine whether N1 is greater than or equal to the predetermined threshold; if yes, it means that the signal in the same frequency band is too strong, and proceed to step S233; if no, proceed to step S234.
[0125] Step S233: Since the technician has set an appropriate first step length in advance based on the initial transmission power of any Doppler radar sensor, the current transmission power of the N1 Doppler radar sensors is simultaneously reduced according to the first step length, and then the process returns to execute the above step S231.
[0126] Step S234: Since the technician has set an appropriate second step length in advance based on the initial sensitivity of any one of the Doppler radar sensors, the current sensitivity of each of the N1 Doppler radar sensors is increased according to the second step length, so that it can generate a sensing trigger result when the tester moves within the entire sensing range defined by the Doppler radar sensing matrix. At this time, the current radar echo signal blocking detection task ends.
[0127] In this embodiment of the invention, when eight test directions are arranged within the entire sensing range defined by the Doppler radar sensing matrix, and a first test point and a second test point are arranged in each test direction, another specific implementation of step S230 above includes the following:
[0128] Step S230.1: Set the center point of the Doppler radar sensing matrix and the intersection point on the second plane to be on the same vertical line, and set all the radar antennas of the Doppler radar sensing matrix on the first plane and facing the second plane to sense the movement of the test personnel;
[0129] Step S230.2: Guide the test personnel to move at eight first test points, perform a radar echo signal blocking detection on the Doppler radar sensing matrix, and then adjust the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements so that the Doppler radar sensing matrix does not experience radar echo signal blocking.
[0130] Step S230.3: Guide the test personnel to move at eight second test points to perform another radar echo signal blocking detection on the Doppler radar sensing matrix, and then perform parameter adjustment on the Doppler radar sensors that do not meet the anti-blocking requirements so that the Doppler radar sensing matrix does not experience radar echo signal blocking.
[0131] It should be noted that before performing steps S230.2 and S230.3, the transmission and reception functions of the 81 Doppler radar sensors should be activated first. In addition, the present invention does not limit the order of execution of steps S230.2 and S230.3.
[0132] More specifically, step S230.2 above can be further explained as follows:
[0133] Step S230.2.1: Guide the tester to move at the first test point in the j-th test direction, and obtain the M1 Doppler radar sensors that have failed to generate a sensing trigger result from the Doppler radar sensing matrix to form the corresponding j-th detection set;
[0134] Step S230.2.2: Determine whether j < 8 is true; if yes, assign j + 1 to j and return to execute step S230.2.1 above; if no, obtain the corresponding set of 8 detections and then execute step S230.2.3.
[0135] Step S230.2.3: Determine whether the 8 detection sets obtained through step S230.2.2 are all empty sets; if yes, end the current radar echo signal blocking detection task; if no, merge and remove duplicates from the 8 detection sets to obtain K1 Doppler radar sensors.
[0136] Step S230.2.4: Determine whether K1 is greater than or equal to the predetermined threshold; if yes, it means that the signal in the same frequency band is too strong, and proceed to step S230.2.5; if no, proceed to step S230.2.6.
[0137] Step S230.2.5: According to the first step, simultaneously reduce the current transmission power of the K1 Doppler radar sensors, and return to execute the above step S230.2.1;
[0138] Step S230.2.6: Adjust the current sensitivity of each of the K1 Doppler radar sensors according to the second step length so that it can generate a sensing trigger result when the tester moves at the first test point in each test direction. At this time, the current radar echo signal blocking detection ends.
[0139] Among them, step S230.2.1 is executed starting from j=1.
[0140] More specifically, step S230.3 above can be further explained as follows:
[0141] Step S230.3.1: Guide the tester to move at the second test point in the j-th test direction, and obtain the M2 Doppler radar sensors that have failed to generate a sensing trigger result from the Doppler radar sensing matrix to form the corresponding j-th detection set;
[0142] Step S230.3.2: Determine whether j < 8 is true; if yes, assign j + 1 to j and return to execute step S230.3.1 above; if no, obtain the corresponding set of 8 detections and then execute step S230.3.3.
[0143] Step S230.3.3: Determine whether the 8 detection sets obtained through step S230.3.2 are all empty sets; if yes, end the current radar echo signal blocking detection task; if no, merge and remove duplicates from the 8 detection sets to obtain K2 Doppler radar sensors.
[0144] Step S230.3.4: Determine whether K2 is greater than or equal to the predetermined threshold; if yes, it means that the signal in the same frequency band is too strong, and proceed to step S230.3.5; if no, proceed to step S230.3.6.
[0145] Step S230.3.5: According to the first step, simultaneously reduce the current transmission power of the K2 Doppler radar sensors, and return to execute the above step S230.3.1;
[0146] Step S230.3.6: Adjust the current sensitivity of each of the K2 Doppler radar sensors according to the second step length so that it can generate a sensing trigger result when the tester moves at the second test point in each test direction. At this time, the current radar echo signal blocking detection ends.
[0147] Among them, step S230.3.1 is executed starting from j=1.
[0148] In this embodiment of the invention, the specific implementation process of step S240 includes the following:
[0149] Step S241: Obtain the i-th Doppler radar sensor from the Doppler radar sensing matrix;
[0150] Step S242: Turn off the transmission function of the i-th Doppler radar sensor, and turn on the transmission function of the other 80 Doppler radar sensors.
[0151] Step S243: Guide the tester to move within the entire sensing range defined by the Doppler radar sensing matrix, and determine whether the i-th Doppler radar sensor can generate a sensing trigger result; if yes, it indicates that the i-th Doppler radar sensor is experiencing co-frequency interference, and proceed to step S244; if no, it indicates that the i-th Doppler radar sensor is not experiencing co-frequency interference, and proceed to step S247.
[0152] Step S244: Enable the transmission function of the i-th Doppler radar sensor, and disable the transmission function of the other 80 Doppler radar sensors.
[0153] Step S245: Guide the tester to move within the entire sensing range defined by the Doppler radar sensing matrix, and obtain the N2 Doppler radar sensors that currently generate the sensing trigger result from the other 80 Doppler radar sensors.
[0154] Step S246: According to the first step, lower the current transmission power of the N2 Doppler radar sensors, and then return to execute the above step S242;
[0155] Step S247: Determine whether i < 81 is true; if yes, assign i + 1 to i and return to execute step S241 above; if no, end the current co-frequency interference detection task.
[0156] Among them, the above step S241 is executed starting from i=1.
[0157] It should be noted that before each execution of step S242 above, it is necessary to ensure that the transmission and reception functions of the 81 Doppler radar sensors are enabled.
[0158] In this embodiment of the invention, since the relative distance between the first plane and the second plane is 2.5 meters, it is assumed that the tester's height is about 1.7 meters and the weight is about 120 kilograms, and the speed range of the tester when moving on the second plane is 1-3 meters per second.
[0159] In this embodiment of the invention, by performing radar echo signal blocking detection on the Doppler radar sensing matrix, and adjusting the transmission power or sensitivity of the associated Doppler radar sensors when the detection fails, the missed triggering phenomenon in the Doppler radar sensing matrix can be effectively reduced. Similarly, by performing co-frequency interference detection on the Doppler radar sensing matrix, and adjusting the transmission power of the associated Doppler radar sensors when the detection fails, the false triggering phenomenon in the Doppler radar sensing matrix can be effectively reduced. In other words, this invention enables the Doppler radar sensing matrix to operate in a stable state when it detects personnel movement.
[0160] Although the description of this application has been quite detailed and particularly focused on several of the described embodiments, it is not intended to limit itself to any of these details or embodiments or any particular embodiment. Rather, it should be considered as effectively covering the intended scope of this application by referring to the appended claims and taking into account the prior art, which provides for a broad possible interpretation of these claims. Furthermore, the foregoing description of this application with respect to embodiments foreseeable by the inventors is intended to provide a useful description, and non-substantial modifications to this application that have not yet been foreseen may still represent equivalent modifications.
Claims
1. A method for testing and adjusting a Doppler radar sensing matrix, characterized in that, The Doppler radar sensing matrix is composed of several Doppler radar sensors, and the method includes: A first plane and a second plane are set up to be parallel to each other. All radar antennas of the Doppler radar sensing matrix are set on the first plane. Test personnel move on the second plane. Eight test directions connected to the same intersection point are set on the second plane. A first test point and a second test point are set on each test direction. The distance between the first test point and the intersection point is less than the distance between the second test point and the intersection point. The Doppler radar sensing matrix is subjected to basic performance testing, and any Doppler radar sensors that do not meet the performance requirements are replaced until the Doppler radar sensing matrix meets the performance requirements. When the Doppler radar sensing matrix meets the performance requirements, the Doppler radar sensing matrix is subjected to co-frequency interference detection, and the parameters of the Doppler radar sensors that do not meet the anti-interference requirements are adjusted until the Doppler radar sensing matrix is free from co-frequency interference. When the Doppler radar sensing matrix meets the performance requirements, radar echo signal blocking detection is performed on the Doppler radar sensing matrix, and the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements are adjusted until there is no radar echo signal blocking in the Doppler radar sensing matrix. The step of performing basic performance testing on the Doppler radar sensing matrix and replacing any Doppler radar sensors that do not meet performance requirements until the Doppler radar sensing matrix meets performance requirements includes: S51. Obtain the single Doppler radar sensor to be tested, and position the center point of its antenna in the vertical direction of the intersection. S52. When the tester moves at each first test point and second test point, determine whether the individual Doppler radar sensor can be triggered; if not, proceed to step S53; if yes, proceed to step S54. S53. Replace the single Doppler radar sensor and make the center point of the antenna of the replaced single Doppler radar sensor located in the vertical direction of the intersection point, then return to step S52. S54. Determine whether there are still Doppler radar sensors to be tested in the Doppler radar sensing matrix; if yes, return to step S51; if no, complete the basic performance test of the Doppler radar sensing matrix. The step of detecting co-frequency interference on the Doppler radar sensing matrix and adjusting the parameters of Doppler radar sensors that do not meet the anti-interference requirements until the Doppler radar sensing matrix is free from co-frequency interference includes the following steps: S11. Obtain the single Doppler radar sensor to be tested, and only disable the transmission function of the single Doppler radar sensor; S12. When the tester moves within the sensing range of the Doppler radar sensing matrix, determine whether the single Doppler radar sensor is triggered; if not, proceed to step S13; if yes, proceed to step S14. S13. Determine whether there are still Doppler radar sensors to be tested in the Doppler radar sensing matrix; if yes, return to step S11; if no, complete the co-frequency interference detection of the Doppler radar sensing matrix. S14. Only enable the transmission function of the single Doppler radar sensor. When the tester moves within the sensing range of the Doppler radar sensing matrix, obtain all Doppler radar sensors in the Doppler radar sensing matrix that are also triggered by sensing, in addition to the single Doppler radar sensor. Reduce the current transmission power of all Doppler radar sensors according to the first step length, and then repeat step S11 for the single Doppler radar sensor. The step of performing radar echo signal blocking detection on the Doppler radar sensing matrix and adjusting the parameters of Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking includes the following steps: S21. When the tester moves within the sensing range of the Doppler radar sensing matrix, determine whether each Doppler radar sensor in the Doppler radar sensing matrix has been triggered. If yes, complete the radar echo signal blocking detection of the Doppler radar sensing matrix. If no, acquire all Doppler radar sensors that have failed to be triggered, and then execute step S22. S22. Determine whether the number of all Doppler radar sensors is greater than or equal to a predetermined threshold. If yes, reduce the current transmission power of all Doppler radar sensors according to the first step length, and then return to step S21. If no, increase the current sensitivity of each Doppler radar sensor according to the second step length until it is triggered when the tester moves within the sensing range of the Doppler radar sensing matrix, thus completing the radar echo signal blocking detection of the Doppler radar sensing matrix.
2. The test and adjustment method for the Doppler radar sensing matrix according to claim 1, characterized in that, The center point of the Doppler radar sensing matrix is located in the vertical direction of the intersection point; The step of performing radar echo signal blocking detection on the Doppler radar sensing matrix and adjusting the parameters of Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking includes: When the tester moves at the eight first test points, a radar echo signal blocking detection is performed on the Doppler radar sensing matrix, and the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements are adjusted until there is no radar echo signal blocking in the Doppler radar sensing matrix. As the tester moves between the eight second test points, another radar echo signal blocking test is performed on the Doppler radar sensing matrix, and the parameters of the Doppler radar sensors that do not meet the anti-blocking requirements are adjusted until the Doppler radar sensing matrix is free from radar echo signal blocking.
3. The method for testing and adjusting the Doppler radar sensing matrix according to claim 2, characterized in that, The process of performing a radar echo signal blocking detection on the Doppler radar sensing matrix while the tester moves at the eight first test points, and adjusting the parameters of Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking, includes the following steps: S31. When the tester moves at each first test point, determine whether each Doppler radar sensor in the Doppler radar sensing matrix has been triggered; if yes, complete one radar echo signal blocking detection of the Doppler radar sensing matrix; if no, obtain all Doppler radar sensors that failed to be triggered at at least one first test point, and then execute step S32. S32. Determine whether the number of all Doppler radar sensors is greater than or equal to a predetermined threshold; if so, reduce the current transmission power of all Doppler radar sensors according to the first step length, and then return to execute step S31. If not, the current sensitivity of each Doppler radar sensor among all the Doppler radar sensors is increased by the second step size until it is triggered when the tester moves at each first test point, thus completing one radar echo signal blocking detection of the Doppler radar sensing matrix.
4. The method for testing and adjusting the Doppler radar sensing matrix according to claim 2, characterized in that, The process of performing another radar echo signal blocking detection on the Doppler radar sensing matrix while the tester moves at eight second test points, and adjusting the parameters of Doppler radar sensors that do not meet the anti-blocking requirements until the Doppler radar sensing matrix is free from radar echo signal blocking, includes the following steps: S41. When the tester moves at each second test point, determine whether each Doppler radar sensor in the Doppler radar sensing matrix has been triggered. If yes, complete another radar echo signal blocking detection of the Doppler radar sensing matrix. If no, obtain all Doppler radar sensors that failed to be triggered at at least one second test point, and then execute step S42. S42. Determine whether the number of all Doppler radar sensors is greater than or equal to a predetermined threshold. If so, the current transmit power of all the Doppler radar sensors is reduced according to the first step length, and then the process returns to step S41. If not, the current sensitivity of each of the Doppler radar sensors is increased by a second step size until it is triggered when the tester moves at each second test point, thus completing another radar echo signal blocking detection of the Doppler radar sensing matrix.
5. The method for testing and adjusting the Doppler radar sensing matrix according to any one of claims 1-4, characterized in that, The distance between the first test point and the intersection is not less than 2 meters, and the distance between the second test point and the intersection is not less than 4 meters.
6. The method for testing and adjusting the Doppler radar sensing matrix according to any one of claims 1-4, characterized in that, The distance between the first plane and the second plane is 2.5 meters; in the Doppler radar sensing matrix, the distance between any two adjacent Doppler radar sensors is 15 centimeters.