Method and device for radar anti-jamming in a ceiling air conditioning system

Abstract

The application relates to a radar anti-interference processing method and device in a ceiling type air conditioning system, wherein the method comprises the following steps: controlling a target air-sweeping panel to perform periodic air-sweeping operation, closing a sending end of a radar and only opening a receiving end of the radar in an Nth air-sweeping period, and determining whether a target radar on the target air-sweeping panel detects an interference signal; in the case that the interference signal is detected, determining an interference angle corresponding to the interference signal; opening the sending end and the receiving end of the radar in an Mth air-sweeping period, and setting a scanning blind area at the interference angle; in the process of passing through multiple air-sweeping periods, if the interference signal continuously exists at the interference angle, the air-sweeping period of the target air-sweeping panel is adjusted to stagger the radar interference. Through the application, mutual interference between radars is avoided, so that the detection of the ceiling type air conditioning system is more accurate, unnecessary scanning of the radars is avoided, and the ceiling type air conditioning system is more energy-saving.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a radar anti-interference processing method and device in a ceiling-type air conditioning system. Background Technology

[0002] With the continuous development of intelligent air conditioning systems, millimeter-wave radar is widely used for indoor environmental sensing and personnel positioning to enhance the intelligent control capabilities of air conditioning. In environments where multiple ceiling-mounted air conditioners (hereinafter referred to as ceiling units) operate in parallel, the simultaneous transmission and reception of radar waves by multiple millimeter-wave radars can easily lead to mutual interference between radars, resulting in decreased detection accuracy and even misjudgments. In existing technologies, millimeter-wave radars are typically fixedly installed on the static structure of the air conditioner, limiting their scanning range and making it impossible to dynamically avoid interference sources. Especially when multiple devices are arranged close together, radar waves reflect and superimpose each other, causing signal chaos and affecting the stability and reliability of radar detection. Summary of the Invention

[0003] This application provides a method and apparatus for radar anti-interference processing in a ceiling-type air conditioning system, in order to solve the problem in the prior art where millimeter-wave radars fixedly installed on the static structure of the air conditioner interfere with each other, resulting in a decrease in the detection accuracy of the millimeter-wave radar and misjudgment.

[0004] In a first aspect, this application provides a method for radar anti-interference processing in a ceiling-mounted air conditioning system, wherein the ceiling-mounted air conditioning system includes at least two ceiling-mounted air conditioners, each ceiling-mounted air conditioner is equipped with a sweep panel and a radar installed on the sweep panel, and the method includes: The target sweep panel is controlled to perform periodic sweep operations. During the Nth sweep cycle, the transmitting end of the radar is turned off and only the receiving end of the radar is turned on, and it is determined whether the target radar on the target sweep panel detects an interference signal; wherein, the target sweep panel is the sweep panel of any of the at least two ceiling-mounted air conditioners; and the value of N is an odd number starting from 1. If an interference signal is detected, the interference angle corresponding to the interference signal is determined; wherein, the interference signal refers to the radar wave signal received by the target radar from another radar at the interference angle; The transmitting and receiving ends of the radar are turned on during the Mth sweep cycle, and a scanning blind zone is set at the interference angle, wherein the value of M is an even number starting from 2; If the interference signal persists at the interference angle during multiple sweep cycles, the sweep cycle of the target sweep panel is adjusted to avoid radar interference.

[0005] Optionally, adjusting the sweeping period of the target sweeping panel to avoid radar interference includes: adjusting the sweeping period of the target sweeping panel to a period value different from the original period; if it is determined that there is no radar interference after adjusting the sweeping period, controlling the target sweeping panel to perform periodic sweeping operations according to the adjusted sweeping period; if it is determined that radar interference still exists after adjusting the sweeping period, measuring the duration of the interference signal at the interference angle in subsequent odd-numbered sweeping periods, and adjusting the sweeping period of the target sweeping panel according to the duration measurement result to avoid radar interference.

[0006] Optionally, the duration measurement of the interference signal at the interference angle includes: controlling the target sweeping panel to remain at the interference angle and controlling the radar receiver to continuously receive the interference signal; and measuring the duration of the interference signal to obtain the duration of the interference signal.

[0007] Optionally, adjusting the sweeping cycle of the target sweeping panel based on the duration measurement result includes: adjusting the sweeping cycle based on the duration of the interference signal as represented by the duration measurement result to adjust the time when the target sweeping panel reaches the interference angle; and restoring the sweeping cycle of the target sweeping panel to the initial sweeping cycle when the duration of the interference signal as represented by the duration measurement result is greater than or equal to the sweeping cycle.

[0008] Optionally, adjusting the sweeping cycle according to the duration to adjust the time when the target sweeping panel reaches the interference angle includes: adjusting the sweeping cycle of the target sweeping panel to the sum of the current sweeping cycle and the duration, and delaying the time when the target sweeping panel reaches the interference angle by the duration; adjusting the phase of the entire sweeping cycle of the target sweeping panel so that the time of each passage through the interference angle is shifted by the duration while the cycle length of the current sweeping cycle remains unchanged.

[0009] Optionally, when there are multiple interference angles, the sweeping period of the target sweeping panel is adjusted, including: obtaining multiple interference interval durations corresponding to the multiple interference angles; constructing a candidate sweeping period set, wherein the sweeping period in the candidate sweeping period set refers to a sweeping period that will not periodically synchronize with the multiple interference interval durations within a preset time length; determining the synchronization factor between each candidate sweeping period in the candidate sweeping period set and the multiple interference interval durations; wherein the synchronization factor refers to the ratio of the least common multiple between the candidate sweeping period and the interference interval duration to the larger period; firstly selecting the smallest synchronization factor from the synchronization factors corresponding to each candidate sweeping period, then selecting the largest synchronization factor from all selected smallest synchronization factors, and using the candidate sweeping period corresponding to the largest synchronization factor as the new sweeping period of the target sweeping panel.

[0010] Optionally, constructing a candidate sweeping cycle set includes: determining the sweeping cycle in the candidate sweeping cycle set by multiplying multiple target values ​​with the initial sweeping cycle of the target sweeping panel, wherein the target value refers to the candidate sweeping cycle being a non-integer multiple of the initial sweeping cycle of the target panel.

[0011] Secondly, this application provides a radar anti-jamming processing device for a ceiling-mounted air conditioning system. The ceiling-mounted air conditioning system includes at least two ceiling-mounted air conditioners, each ceiling-mounted air conditioner being equipped with a swing panel and a radar mounted on the swing panel. The device includes: The first processing module is used to control the target sweeping panel to perform periodic sweeping operations, and to turn off the transmitting end of the radar and turn on only the receiving end of the radar during the Nth sweeping cycle, and to determine whether the target radar on the target sweeping panel has detected an interference signal; wherein, the target sweeping panel is the sweeping panel of any of the at least two ceiling-mounted air conditioners; and the value of N is an odd number starting from 1. The determination module is used to determine the interference angle corresponding to the interference signal when an interference signal is detected; wherein, the interference signal refers to the radar wave signal received by the target radar from other radars at the interference angle; The second processing module is used to activate the transmitter and receiver of the radar during the Mth sweep cycle and set a scanning blind zone at the interference angle, wherein the value of M is an even number starting from 2. The third processing module is used to adjust the sweeping cycle of the target sweeping panel to avoid radar interference if the interference signal continues to exist at the interference angle during multiple sweeping cycles.

[0012] Thirdly, this application provides an air conditioning system, which includes an air conditioner control device, the air conditioner control device including: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to execute the radar anti-interference processing method in the ceiling-type air conditioning system described in the first aspect of this application.

[0013] Fourthly, this application also provides a computer storage medium storing computer-executable instructions, which are used to execute the radar anti-interference processing method in the ceiling-type air conditioning system described in the first aspect of this application.

[0014] Compared with the prior art, the technical solution provided in this application has the following advantages: The method provided in this application controls the target sweeping panel to perform periodic sweeping operations. During the Nth sweeping cycle, the transmitting end of the radar is turned off and only the receiving end of the radar is turned on, and it is determined whether the target radar on the target sweeping panel detects an interference signal. Based on this, if an interference signal is detected, the interference angle corresponding to the interference signal is determined, and then the transmitting end and receiving end of the radar are turned on during the Mth sweeping cycle. A scanning blind zone is set at the interference angle. Finally, if an interference signal continues to exist at the interference angle during multiple sweeping cycles, the sweeping cycle of the target sweeping panel is adjusted to avoid radar interference. It can be seen that in this application embodiment, each ceiling-mounted air conditioner is equipped with a sweeping panel and a radar installed on the sweeping panel. During the periodic sweeping process of the sweeping panel, through the division of labor between odd and even cycles, it can actively detect the location of the interference source and avoid interference during normal detection, thus avoiding misjudgment. Moreover, when interference continues, the cycle is actively adjusted to stagger the synchronization with other radars in time, thereby improving the detection stability when multiple units coexist. Attached Figure Description The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0017] Figure 1 A flowchart illustrating a radar anti-interference processing method in a ceiling-mounted air conditioning system provided in this application embodiment; Figure 2 A schematic diagram of a ceiling-mounted air conditioning system based on millimeter-wave radar anti-interference is provided for an embodiment of this application; Figure 3 A flowchart illustrating a control method for anti-interference based on millimeter-wave radar provided in this application embodiment; Figure 4 A schematic diagram of the radar anti-interference processing device in the ceiling-type air conditioning system provided in this application embodiment; Figure 5 This is a schematic diagram of the structure of the air conditioner control device in the air conditioning system provided in the embodiments of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0019] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0020] To address the problem of mutual interference between millimeter-wave radars fixedly mounted on the static structure of air conditioners in existing technologies, which leads to decreased detection accuracy and misjudgments, this application provides a radar anti-interference processing method in a ceiling-mounted air conditioning system. The ceiling-mounted air conditioning system in this embodiment includes at least two ceiling-mounted air conditioners, each equipped with a swing panel and a radar mounted on the swing panel. Figure 1 As shown, the method includes: Step 101: Control the target sweep panel to perform periodic sweep operation. During the Nth sweep cycle, turn off the radar transmitter and only turn on the radar receiver, and determine whether the target radar on the target sweep panel has detected an interference signal. The target sweep panel is the sweep panel of any of the at least two ceiling air conditioners. The value of N is an odd number starting from 1. In this application and its embodiments, the radar can be a millimeter-wave radar or other types of radar. Furthermore, the periodic sweeping operation in this application refers to the sweeping panel reciprocating horizontally at a fixed period T, with the radar moving synchronously with the panel to achieve environmental detection at different angles.

[0021] Furthermore, the Nth sweep cycle (where N is an odd number) refers to the 1st, 3rd, 5th, and so on sweep cycles. During these cycles, the radar's transmitter is turned off, and only the receiver is turned on. The purpose is to monitor for radar signal waves emitted by other radars in the environment without transmitting the radar's own signal, thus avoiding self-interference. Therefore, interference signals refer to radar signal waves received by the radar from other ceiling-mounted air conditioning radars. If interference is detected at a certain angle, that angle is recorded as the interference angle.

[0022] Step 102: If an interference signal is detected, determine the interference angle corresponding to the interference signal; wherein, the interference signal refers to the radar wave signal sent by other radars received by the target radar at the interference angle. Step 103: In the Mth sweep cycle, turn on the radar's transmitter and receiver, and set the scanning blind zone at the interference angle, where M is an even number starting from 2. In this context, the Mth sweep cycle (where M is an even number) refers to the 2nd, 4th, 6th, and so on sweep cycles. During these cycles, the radar normally transmits and receives signals for detection, but the received signals are ignored at previously recorded interference angles, creating a scanning blind zone to prevent interference signals from being mistaken for valid targets.

[0023] Step 104: If interference signals persist at the interference angle during multiple sweep cycles, adjust the sweep cycle of the target sweep panel to avoid radar interference.

[0024] It is evident that if interference signals repeatedly appear at the same interference angle in multiple sweep cycles (e.g., three consecutive odd-numbered cycles), it is determined to be continuous interference, and the sweep cycle of the unit needs to be adjusted to avoid synchronization with other radars.

[0025] For steps 101 to 104 above, in a specific example, two ceiling-mounted radars are installed in the conference room: A (the main unit) and B (the interference source). A's sweep cycle T = 60 seconds, and the sweep panel rotates from 0° to 180°. First sweep (N=1, odd number): A turns off radar transmission and only receives. When the sweep panel rotates to 45°, A receives radar waves emitted by B. A records the presence of interference at 45°. Second sweep (M=2, even number): A normally transmits radar waves for detection, but when the panel rotates to 45°, A actively ignores the echo at that angle (setting a blind zone) to avoid misinterpreting B's signal as a real target. Third, fifth… sweeps: Repeated detection; if interference from B is detected at 45° each time, it is determined that interference is continuous. Trigger adjustment: A decides to adjust its sweep cycle (e.g., from 60 seconds to 40 seconds) to avoid synchronization with B.

[0026] Therefore, through steps 101 to 102, the target sweeping panel is controlled to perform periodic sweeping operations. During the Nth sweeping cycle, the radar transmitter is turned off and only the receiver is turned on, and it is determined whether the target radar on the target sweeping panel detects an interference signal. Based on this, if an interference signal is detected, the interference angle corresponding to the interference signal is determined. Then, during the Mth sweeping cycle, the radar transmitter and receiver are turned on, and a scanning blind zone is set at the interference angle. Finally, if an interference signal persists at the interference angle during multiple sweeping cycles, the sweeping cycle of the target sweeping panel is adjusted to avoid radar interference. Thus, in this embodiment, each ceiling-mounted air conditioner is equipped with a sweeping panel and a radar installed on the sweeping panel. During the periodic sweeping process of the sweeping panel, the odd-even cycle division of labor allows for proactive detection of the interference source's location and avoidance of interference during normal detection, preventing misjudgment. Moreover, when interference persists, the cycle is proactively adjusted to stagger synchronization with other radars in time, improving detection stability when multiple units coexist.

[0027] In an optional embodiment of this application, adjusting the sweeping cycle of the target sweeping panel in step 104 above to avoid radar interference may further include: Step 11: Adjust the swing cycle of the target swing panel to a cycle value that is different from the original cycle; Step 12: If it is confirmed that there is no radar interference after adjusting the sweeping cycle, control the target sweeping panel to perform periodic sweeping operation according to the adjusted sweeping cycle. Step 13: If radar interference still exists after adjusting the sweeping cycle, measure the duration of the interference signal at the interference angle in subsequent odd-numbered sweeping cycles, and adjust the sweeping cycle of the target sweeping panel according to the duration measurement results to avoid radar interference.

[0028] In this embodiment, adjusting the sweeping period of the target sweeping panel to a value different from the original period can mean adjusting the sweeping period to a value greater than or less than the original period, such as adjusting the sweeping period to 0.7T, 0.8T, or 4 / 3T, where T represents the original period value. Based on this, taking T=60s as an example, and adjusting the period value after interference occurs, the period is first changed to a value less than 60 seconds, such as 40 seconds (2T / 3). Then, it is observed whether interference still exists at 45°. Case 1: Interference disappears → A maintains a 40-second cycle. Case 2: Interference still exists (e.g., the sweeping period of the interfering radar is 20 seconds, and 40 seconds is still a multiple of 20 seconds), then the target sweeping panel measures the duration of the interference signal at 45° in subsequent odd-numbered cycles (e.g., the 5th sweep) and further adjusts based on the measurement results. Therefore, in this embodiment of the application, a strategy of starting with the simple and then moving to the complex is adopted. That is, the cycle is shortened by a fixed ratio first, and if it is ineffective, then fine measurement is performed to avoid over-calculation. This also ensures that the system can respond quickly in most simple interference scenarios.

[0029] In this embodiment of the application, the method of measuring the duration of the interference signal at the interference angle involved in step 13 above may further include: Step 21: Control the target sweep panel to remain at the interference angle, and control the radar receiver to continuously receive interference signals; Step 22: Measure the duration of the interference signal to obtain the duration of the interference signal.

[0030] In this embodiment, controlling the sweep panel to stay at the interference angle means temporarily interrupting the normal sweep movement so that the radar is fixedly pointed in the interference direction; while continuously receiving the interference signal means that during the stay, the radar receiver works continuously and records the existence time of the interference signal; the duration refers to the length of the continuous time period from the appearance of the interference signal to its disappearance.

[0031] In a specific example, the radar on the target's air-sweeping panel might detect interference at 45° that persists even after the period is changed to 40 seconds. Therefore, during an odd-numbered period, the air-sweeping panel is held stationary at 45°, with the radar only receiving signals and not transmitting, continuously monitoring. If the interference signal appears at second 0 and persists until second 20, the duration is recorded as 20 seconds. If the interference persists, the duration is recorded as infinite (or greater than a threshold, such as 60 seconds). It should be noted that if the interference lasts for several minutes, the target panel remaining stationary for an extended period can cause the air conditioner to lose its air-sweeping function. Therefore, in this embodiment, if the interference is not detected after more than two periods (e.g., 120 seconds), the measurement is forcibly terminated, and a default strategy is adopted (e.g., restoring the original period and maintaining the blind zone). Thus, through steps 21 and 22, the stationary measurement only occurs in odd-numbered periods and does not affect normal detection in even-numbered periods. Furthermore, the temporal characteristics of the interference can be accurately obtained, providing a quantitative basis for subsequently delaying arrival or restoring the original period.

[0032] In an optional embodiment of this application, the method of adjusting the sweeping cycle of the target sweeping panel based on the duration measurement result involved in step 13 above may further include: Step 31: If the duration of the interference signal represented by the duration measurement result is less than the sweeping cycle, adjust the sweeping cycle according to the duration to adjust the time when the target sweeping panel reaches the interference angle. Step 32: If the duration of the interference signal, as represented by the duration measurement result, is greater than or equal to the sweeping cycle, restore the sweeping cycle of the target sweeping panel to the initial sweeping cycle.

[0033] If the duration is less than the sweep cycle, it indicates that the interference signal has a window of inactivity within each sweep cycle. In this case, the machine can avoid the interference by delaying the time it passes through the interference angle, allowing it to pass through that angle within the window of inactivity. If the duration is greater than or equal to the sweep cycle, it indicates that the interference signal persists throughout the entire cycle without any window of inactivity. In this case, passing through that angle at any time will result in interference; therefore, the initial sweep cycle should be restored, and the blind zone should be maintained.

[0034] In a specific example, if the measured duration is 20 seconds and the sweep period is 60 seconds, it indicates that the interference has a window of inactivity. This can be mitigated by adjusting the period or phase to delay the arrival time at 45° by 20 seconds, ensuring the interference disappears just as it arrives. If the measured duration is 70 seconds and the sweep period is 60 seconds, it indicates that the interference persists without a window of inactivity throughout the entire cycle. In this case, no adjustment can avoid it; the original 60-second cycle must be restored, and the 45° signal (blind spot) must be permanently ignored.

[0035] In other words, in this embodiment, for interference with a window period, the detection capability of that angle is restored by delaying the time, thereby reducing the blind zone area. For interference without a window period, the detection of that angle is abandoned to avoid ineffective adjustments and maintain system stability.

[0036] In an optional embodiment of this application, the method of adjusting the sweeping cycle according to the duration to adjust the time when the target sweeping panel reaches the interference angle, as mentioned in step 31 above, may further include: Step 41: Adjust the sweeping cycle of the target sweeping panel to the sum of the current sweeping cycle and the duration, and delay the duration of the moment when the target sweeping panel reaches the interference angle. Step 42: Adjust the phase of the target sweep panel throughout the entire sweep cycle so that the duration of the overall shift at each time the interference angle is passed remains unchanged while the duration of the current sweep cycle remains the same.

[0037] As can be seen, this application provides two specific methods for delaying the arrival time at the interference angle: Method 1: Adjust the sweeping cycle to the current cycle plus its duration. Because the cycle is longer, the sweeping speed is slower, and the arrival time at each angle is delayed. Specifically, the arrival time at the interference angle is delayed by a longer duration than before, thus falling into the interference window.

[0038] In a specific example, taking a duration of 20 seconds and a sweep cycle of 60 seconds, the new cycle = 60 + 20 = 80 seconds. With the sweep speed reduced, the angle that was originally reached at 45° at the 10th second is now delayed to the (10+20) = 30th second. Since the interference exists from 0 to 20 seconds, it disappears by the 30th second, and the obstacle is successfully avoided.

[0039] Method 2: Keep the cycle unchanged, but shift the starting phase of the entire sweeping motion by a certain duration. For example, instead of starting the sweeping motion from 0°, start from the angle after a certain duration. This way, the sweeping speed remains the same, but the overall duration shifts at the absolute moment of each angle, thus ensuring that the interference angle falls within the window period.

[0040] In a specific example, taking a duration of 20 seconds and a sweeping cycle of 60 seconds, the cycle remains unchanged at 60 seconds, but the start time of the sweeping is delayed by 20 seconds (for example, instead of starting from 0°, it starts from a certain intermediate angle). In this way, the absolute time of reaching 45° also changes from the 10th second to the 30th second, thus avoiding interference.

[0041] It should be noted that the two methods can be used individually or in combination. Method one is suitable for applications that can tolerate periodic variations, while method two is suitable for scenarios that require maintaining a fixed period (such as when working with other systems). These two methods provide flexible engineering implementation options for avoiding radar interference, and can effectively avoid periodic interference by utilizing time-dimensional offsets without increasing hardware costs.

[0042] In an optional embodiment of this application, when there are multiple interference angles, the method of adjusting the sweeping cycle of the target sweeping panel involved in step 104 above may further include: Step 51: Obtain the duration of multiple interference intervals corresponding to multiple interference angles; Among them, the multiple interference interval duration refers to the time interval (i.e., the sweeping cycle or transmission cycle of the interference source) recorded by listening to the interference signal multiple times for each interference angle, denoted as T_i.

[0043] Step 52: Construct a candidate sweep cycle set, wherein the sweep cycle in the candidate sweep cycle set refers to a sweep cycle that will not periodically synchronize with multiple interference intervals within a preset time length. The candidate sweeping cycle set refers to those cycle values ​​that will not periodically synchronize with all T_i within a preset time length (e.g., 10000 seconds). Furthermore, in this embodiment, the least common multiple (LCM) of the candidate cycle T_c and each T_i is required to be greater than a preset threshold.

[0044] Step 53: Determine the synchronization factor between each candidate sweeping cycle and multiple interference interval durations in the candidate sweeping cycle set; where the synchronization factor is the ratio of the least common multiple between the candidate sweeping cycle and the interference interval duration to the larger cycle. Step 54: First, select the minimum synchronization factor from the synchronization factors corresponding to each candidate sweeping cycle, then select the maximum synchronization factor from all the selected minimum synchronization factors, and take the candidate sweeping cycle corresponding to the maximum synchronization factor as the new sweeping cycle of the target sweeping panel.

[0045] In the embodiments of this application, the synchronization factor refers to the ratio of LCM(T_c, T_i) / max(T_c, T_i) (the larger of the candidate sweep period and the interference interval duration). The smaller the ratio, the closer the least common multiple of the two periods is to the larger period, that is, the higher the synchronization frequency (the more frequent the interference); the larger the ratio, the longer the synchronization period (the rarer the interference).

[0046] In this specific example, the original sweeping cycle of the target sweeping panel is T0 = 60 seconds. Three interference angles were detected, and the corresponding interference source cycles (obtained through multiple monitoring sessions) are as follows: Interference source 1: cycle T1 = 60 seconds; Interference source 2: cycle T2 = 40 seconds; Interference source 3: cycle T3 = 30 seconds. A candidate sweeping cycle set is constructed (not an integer multiple, and the least common multiple of the cycle with each interference source is greater than a preset threshold, e.g., 10000 seconds): Candidate cycle C1 = 1.3 × 60 = 78 seconds; Candidate cycle C2 = 1.7 × 60 = 102 seconds; Candidate cycle C3 = 0.8 × 60 = 48 seconds.

[0047] 1. Candidate sweeping cycle If the candidate period is 1 second, then the synchronization factor between the candidate period and each interference source is shown in Table 1.

[0048] Table 1

[0049] Therefore, the set of synchronization factors for this candidate period includes 10, 20, and 5, so the minimum synchronization factor is 5. 2. Candidate sweeping cycle If the candidate period is 1 second, then the synchronization factor between the candidate period and each interference source is shown in Table 2.

[0050] Table 2

[0051] Therefore, the set of synchronization factors includes 10, 20, and 5, and the smallest synchronization factor is 5.

[0052] 3. Candidate sweeping cycle If the time interval is 1 second, then the synchronization factors of the candidate period and each interference source are shown in Table 3.

[0053] Table 3

[0054] Therefore, if the set of synchronization factors includes 4, 5, and 5, then the smallest synchronization factor is 4.

[0055] As shown above, for each candidate cycle and each interference source, the minimum synchronization factor selected is 5, 5, and 4. Therefore, the maximum synchronization factor selected is 5. Since there are two candidate sweep cycles corresponding to 5, they are... Seconds and Therefore, when multiple candidate cycles have the same maximum and minimum synchronization factors, one can be arbitrarily selected, or further selected according to auxiliary rules (such as selecting the value of the cycle closest to the original cycle). In this embodiment, 78 seconds can be selected because 78 seconds is closer to the original cycle of 60 seconds, which makes the adjustment of the sweeping frequency of the target sweeping panel smaller than the adjustment of 102 seconds, and is more suitable for the current sweeping cycle.

[0056] As shown in the example above, after determining the final adjusted sweep period to be 78 seconds, regardless of the interference source, the interval (in units of longer periods) between the radar on the target sweep panel and other interference sources will not be less than 5 periods. And if you choose... If the time interval is less than 1 second, then in the worst case there are only 4 cycles, and interference is more frequent. Therefore, the above method avoids a sharp decline in system performance caused by a certain interference source being highly synchronized with the candidate cycle.

[0057] In an optional embodiment of this application, the method of constructing the candidate sweeping cycle set involved in step 52 above can be further described as follows: the product of multiple target values ​​and the initial sweeping cycle of the target sweeping panel is determined as the sweeping cycle in the candidate sweeping cycle set, wherein the target value refers to a candidate sweeping cycle that is a non-integer multiple of the initial sweeping cycle of the target panel.

[0058] Therefore, the target value in this embodiment refers to the coefficient used to multiply the initial sweeping period T0. This coefficient should be a non-integer (e.g., 1.3, 1.7, 0.8, etc.) to ensure that the new period is not an integer multiple of T0. This method reduces the search space for candidate periods, improves computational efficiency, and ensures that the new period and the original period will not generate harmonic synchronization, providing a basis for further avoiding multiple interference sources.

[0059] The present application will be explained and described below with reference to specific embodiments of the present application. These specific embodiments provide a ceiling-type air conditioning system and its control method based on millimeter-wave radar anti-interference. The system is as follows: Figure 2 As shown, it includes: The microprocessor unit, the mainboard processor, communicates with the millimeter-wave radar and controls the sweeping angle of the sweeping panel.

[0060] Memory chip: Non-volatile memory chip that communicates with the MCU. The MCU can write data such as the sweeping angle and cycle corresponding to the interference source into the storage device, which can be saved even if power is lost.

[0061] Sweeping panel: Structurally, it can embed millimeter-wave radar, and the illumination angle of the millimeter-wave radar changes with the sweeping angle.

[0062] Millimeter-wave radar: This circuit draws power from the indoor unit's communication line, activates its own switching power supply circuit, and then disconnects from the communication line.

[0063] Combination Figure 2 In this specific implementation, the control method based on millimeter-wave radar anti-interference is as follows: Figure 3 As shown, it includes: Step 301: Execute the air sweeping command; Step 302: Determine whether a fixed interference source is detected; if not, proceed to step 303; if yes, proceed to step 306. Step 303: Determine if it is an odd-numbered sweeping cycle; if yes, proceed to step 304; if no, proceed to step 305. Step 304: Turn off radar transmission, keep receiving, and detect the angle of interference during the sweep cycle; Step 305: Turn on radar transmission, scan radar signals throughout the entire sweep cycle, and ignore the interference angle radar signals of the technical wheel. Step 306, adjust the area around the sweeping air by 2T / 3; Step 307: Determine whether a fixed interference source is detected and the angle remains unchanged; if not, proceed to step 302; if yes, proceed to step 308. Step 308, stay at the sweep angle T; Step 309: Determine whether interference is consistently detected; if not, proceed to step 310; if not, proceed to step 311. Step 310: Record the time T2 of the interference hour, and adjust the even-numbered sweeping cycle to 2T / 3+T2; Step 311, restore the sweeping cycle to T.

[0064] Based on steps 301 to 311 above, during operation, when the millimeter-wave radar is dynamically scanning with the hoist's sweeping panel, in the first sweeping cycle, its transmitting end is turned off, only the receiving end is turned on, and the sweeping panel is controlled to perform a complete rotational scan. During this process, the receiving end continuously monitors whether radar waves from other units are reflected and received. If the sweeping panel receives a radar wave signal at a certain angle a1, it is determined that there is a potential interference source at that angle, and the angle is recorded (stored in the memory chip).

[0065] In the second scanning cycle, the millimeter-wave radar's transmission signal is activated, but radar signals reaching angle a1 at the scanning panel are ignored during the scan, thus creating a scanning blind zone A1. In the third scanning cycle, the millimeter-wave radar's transmitter is also turned off, with only the receiver activated, and the detection from the first scanning cycle is repeated. If a radar signal is detected at angle a2 this time, it is recorded, and in the fourth scanning cycle, radar signals at angle a2 are avoided, creating blind zone A2. This cycle is repeated to collect interference source data. When the running time is long enough, or more than one fixed interference source is collected, basic information about the fixed interference angle is obtained. If there is always an interference signal at angle a1, then the following two possibilities exist: 1) It's possible that the sweeping cycles of the two hoisting machines are basically the same, causing interference to occur every time. The sweeping cycle of this machine can be adjusted to 2T / 3 to avoid radar interference and eliminate the A1 blind zone. If this still doesn't work, in the next odd-numbered sweep, fix the a1 angle and wait for a period T to see if the interference disappears. If it does, increase the interference disappearance time in even-numbered sweeps to ensure that interference is avoided.

[0066] 2) It's possible that another ceiling-mounted scanner is not in a non-sweeping state, and even adjusting the sweeping cycle cannot avoid the blind spot. If adjusting the cycle to 2T / 3 still fails to avoid it, then revert to the original scanning cycle T. This means that after adjusting the cycle to 2T / 3 and stopping scanning for observation, if the interference source is found to be persistent, it is determined that the other party is a fixed interference source, and the original scanning cycle is resumed.

[0067] In other words, through the method described in this application, the radar receiving strategy is dynamically adjusted based on whether the interference during odd-numbered sweeping cycles persists, allowing the radar to avoid interference signals at that angle during sweeping cycles in different periods, thereby preventing continuous interference. That is, through the linkage mechanism between the radar and the sweeping panel, dynamic radar wave avoidance and interference suppression are achieved, improving the stability and detection accuracy of multiple riser machines working together.

[0068] Corresponding to the above Figure 1 This application provides a radar anti-interference processing device for a ceiling-mounted air conditioning system. The ceiling-mounted air conditioning system includes at least two ceiling-mounted air conditioners, each of which is equipped with a swing panel and a radar mounted on the swing panel. Figure 4 As shown, the device includes: The first processing module 402 is used to control the target sweeping panel to perform periodic sweeping operations. During the Nth sweeping cycle, the transmitting end of the radar is turned off and only the receiving end of the radar is turned on, and it is determined whether the target radar on the target sweeping panel has detected an interference signal. The target sweeping panel is the sweeping panel of any of the at least two ceiling air conditioners. The value of N is an odd number starting from 1. The determination module 404 is used to determine the interference angle corresponding to the interference signal when an interference signal is detected; wherein, the interference signal refers to the radar wave signal sent by other radars received by the target radar at the interference angle; The second processing module 406 is used to activate the radar's transmitter and receiver during the Mth sweep cycle and set a scanning blind zone at the interference angle, where M is an even number starting from 2. The third processing module 406 is used to adjust the sweeping cycle of the target sweeping panel to avoid radar interference if interference signals continue to exist at the interference angle during multiple sweeping cycles.

[0069] In an optional embodiment of this application, the third processing module includes: The adjustment unit is used to adjust the sweeping cycle of the target sweeping panel to a cycle value different from the original cycle. The first processing unit is used to control the target sweeping panel to perform periodic sweeping operations according to the adjusted sweeping cycle, provided that there is no radar interference after the sweeping cycle is adjusted. The second processing unit is used to measure the duration of the interference signal at the interference angle in subsequent odd-numbered sweeping cycles when it is determined that radar interference still exists after adjusting the sweeping cycle, and to adjust the sweeping cycle of the target sweeping panel according to the duration measurement result in order to avoid radar interference.

[0070] In an optional embodiment of this application, the second processing unit in this application includes: The first processing subunit is used to control the target sweep panel to remain at the interference angle and to control the radar receiver to continuously receive interference signals. The second processing subunit is used to measure the duration of the interference signal to obtain the duration of the interference signal.

[0071] In an optional embodiment of this application, the second processing unit in this application includes: The third processing subunit is used to adjust the sweeping cycle according to the duration when the duration of the interference signal represented by the duration measurement result is less than the sweeping cycle, so as to adjust the time when the target sweeping panel reaches the interference angle. The fourth processing subunit is used to restore the sweeping cycle of the target sweeping panel to the initial sweeping cycle when the duration of the interference signal characterized by the duration measurement result is greater than or equal to the sweeping cycle.

[0072] In an optional embodiment of this application, the third processing subunit in this application is used to perform the following steps: adjust the sweeping cycle of the target sweeping panel to the sum of the current sweeping cycle and the duration, and delay the duration of the moment when the target sweeping panel reaches the interference angle; adjust the phase of the entire sweeping cycle of the target sweeping panel so that the moment when it passes the interference angle is shifted by the duration and the cycle duration of the current sweeping cycle remains unchanged.

[0073] In an optional embodiment of this application, when there are multiple interference angles, the third processing module in this application embodiment includes: The acquisition unit is used to acquire multiple interference interval durations corresponding to multiple interference angles; The construction unit is used to construct a candidate sweeping cycle set. The sweeping cycle in the candidate sweeping cycle set refers to a sweeping cycle that will not periodically synchronize with multiple interference intervals within a preset time length. The determining unit is used to determine the synchronization factor between each candidate sweeping cycle in the candidate sweeping cycle set and multiple interference interval durations; wherein, the synchronization factor is the ratio of the least common multiple between the candidate sweeping cycle and the interference interval duration to the larger cycle. The third processing unit is used to first select the minimum synchronization factor from the synchronization factors corresponding to each candidate sweeping cycle, then select the maximum synchronization factor from all the selected minimum synchronization factors, and use the candidate sweeping cycle corresponding to the maximum synchronization factor as the new sweeping cycle of the target sweeping panel.

[0074] In optional embodiments of this application, the construction unit in this application includes: A sub-unit is constructed to determine the sweeping period in the candidate sweeping period set by multiplying multiple target values ​​with the initial sweeping period of the target sweeping panel. Here, the target value refers to a candidate sweeping period that is a non-integer multiple of the initial sweeping period of the target panel.

[0075] like Figure 5 As shown in the figure, this application embodiment provides an air conditioning system, which includes an air conditioner control device, including a processor 511, a communication interface 512, a memory 513, and a communication bus 514, wherein the processor 511, the communication interface 512, and the memory 513 communicate with each other through the communication bus 514. Memory 513 is used to store computer programs; In one embodiment of this application, when the processor 511 executes the program stored in the memory 513, it implements the radar anti-interference processing method in the ceiling-type air conditioning system provided in any of the aforementioned method embodiments. Its function is similar and will not be described again here.

[0076] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the radar anti-interference processing method in the ceiling-type air conditioning system provided in any of the foregoing method embodiments.

[0077] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0078] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0079] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0080] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for radar anti-interference processing in a ceiling-mounted air conditioning system, characterized in that, The ceiling-mounted air conditioning system includes at least two ceiling-mounted air conditioners, each of which is equipped with a swing panel and a radar mounted on the swing panel. The method includes: The target sweep panel is controlled to perform periodic sweep operations. During the Nth sweep cycle, the transmitting end of the radar is turned off and only the receiving end of the radar is turned on, and it is determined whether the target radar on the target sweep panel detects an interference signal; wherein, the target sweep panel is the sweep panel of any of the at least two ceiling-mounted air conditioners; and the value of N is an odd number starting from 1. If an interference signal is detected, the interference angle corresponding to the interference signal is determined; wherein, the interference signal refers to the radar wave signal received by the target radar from another radar at the interference angle; The transmitting and receiving ends of the radar are turned on during the Mth sweep cycle, and a scanning blind zone is set at the interference angle, wherein the value of M is an even number starting from 2; If the interference signal persists at the interference angle during multiple sweep cycles, the sweep cycle of the target sweep panel is adjusted to avoid radar interference.

2. The method according to claim 1, characterized in that, Adjusting the sweeping cycle of the target sweeping panel to avoid radar interference includes: The sweeping cycle of the target sweeping panel is adjusted to a cycle value different from the original cycle; If it is determined that there is no radar interference after the sweeping cycle is adjusted, the target sweeping panel is controlled to perform periodic sweeping operations according to the adjusted sweeping cycle. If radar interference persists after adjusting the sweeping cycle, the duration of the interference signal at the interference angle is measured in subsequent odd-numbered sweeping cycles. Based on the duration measurement results, the sweeping cycle of the target sweeping panel is adjusted to avoid radar interference.

3. The method according to claim 2, characterized in that, The duration of the interference signal at the interference angle is measured, including: The target air-sweeping panel is controlled to remain at the interference angle, and the radar receiver is controlled to continuously receive interference signals. The duration of the interference signal is measured to obtain the duration of the interference signal.

4. The method according to claim 2, characterized in that, Adjusting the sweeping cycle of the target sweeping panel based on the duration measurement results includes: If the duration of the interference signal, as represented by the duration measurement result, is less than the sweeping cycle, the sweeping cycle is adjusted according to the duration to adjust the time when the target sweeping panel reaches the interference angle. If the duration of the interference signal, as characterized by the duration measurement result, is greater than or equal to the sweeping cycle, the sweeping cycle of the target sweeping panel is restored to the initial sweeping cycle.

5. The method according to claim 4, characterized in that, Adjusting the sweeping cycle according to the duration of the interference, in order to adjust the time at which the target sweeping panel reaches the interference angle, includes: The sweeping cycle of the target sweeping panel is adjusted to the sum of the current sweeping cycle and the duration, and the duration of the time when the target sweeping panel reaches the interference angle is delayed by the duration. Adjust the phase of the target sweep panel throughout the entire sweep cycle so that the moment of each passage through the interference angle is offset by the duration while the cycle duration of the current sweep cycle remains unchanged.

6. The method according to claim 1, characterized in that, When there are multiple interference angles, the sweeping cycle of the target sweeping panel is adjusted, including: Obtain multiple interference interval durations corresponding to the multiple interference angles; Construct a candidate sweep cycle set, wherein the sweep cycle in the candidate sweep cycle set refers to a sweep cycle that will not periodically synchronize with the multiple interference intervals within a preset time length. Determine the synchronization factor between each candidate sweeping cycle in the candidate sweeping cycle set and the duration of the plurality of interference intervals; wherein, the synchronization factor is the ratio of the least common multiple between the candidate sweeping cycle and the duration of the interference interval to the larger cycle. First, select the minimum synchronization factor from the synchronization factors corresponding to each candidate sweeping cycle. Then, select the maximum synchronization factor from all the selected minimum synchronization factors. Finally, use the candidate sweeping cycle corresponding to the maximum synchronization factor as the new sweeping cycle of the target sweeping panel.

7. The method according to claim 6, characterized in that, Construct a candidate sweep cycle set, including: The product of multiple target values ​​and the initial sweeping period of the target sweeping panel is determined as the sweeping period in the candidate sweeping period set, wherein the target value refers to the candidate sweeping period being a non-integer multiple of the initial sweeping period of the target panel.

8. A radar anti-interference processing device for a ceiling-mounted air conditioning system, characterized in that, The atrium-type air conditioning system includes at least two atrium-type air conditioners, each atrium-type air conditioner is equipped with a swing panel and a radar installed on the swing panel, the device includes: The first processing module is used to control the target sweeping panel to perform periodic sweeping operations, and to turn off the transmitting end of the radar and turn on only the receiving end of the radar during the Nth sweeping cycle, and to determine whether the target radar on the target sweeping panel has detected an interference signal; wherein, the target sweeping panel is the sweeping panel of any of the at least two ceiling-mounted air conditioners; and the value of N is an odd number starting from 1. The determination module is used to determine the interference angle corresponding to the interference signal when an interference signal is detected; wherein, the interference signal refers to the radar wave signal received by the target radar from other radars at the interference angle; The second processing module is used to activate the transmitter and receiver of the radar during the Mth sweep cycle and set a scanning blind zone at the interference angle, wherein the value of M is an even number starting from 2. The third processing module is used to adjust the sweeping cycle of the target sweeping panel to avoid radar interference if the interference signal continues to exist at the interference angle during multiple sweeping cycles.

9. An air conditioning system, characterized in that, The air conditioning system includes an air conditioner control device, which includes a processor, a communication interface, a memory, and a communication bus. The processor, communication interface, and memory communicate with each other through the communication bus. The memory is used to store computer programs. The processor is used to execute the computer program to implement the radar anti-interference processing method in the ceiling-type air conditioning system according to any one of claims 1-7.

10. A storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the radar anti-interference processing method in the ceiling-type air conditioning system according to any one of claims 1-7.

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