Operation method for a millimeter-wave radar detector based on adjustable frequency and door sensing device thereof

Abstract

An operation method based on a radar sensor is applied to a door sensing device having a signal emitter, a signal receiver and an operation processor. The operation method includes driving the signal emitter to emit a radar signal and then receiving the reflected radar signal by the signal receiver, analyzing the reflected radar signal to compare with a preset threshold, and deciding whether to adjust an execution parameter of the signal emitter and / or apply for a door determination parameter of the door sensing device.

Description

[Technical Field]

[0001] The present invention provides an operation method and a door plate detection device, particularly an operation method and a door plate detection device based on an adjustable frequency millimeter-wave radar detector. [Previous Technology]

[0002] Traditional door detection devices typically utilize wireless signal detection technology to determine the open or closed state of a door. For example, infrared detectors can be programmed to set the position and angle of an infrared beam to monitor the door's opening or closing mode; microwave detectors can monitor moving objects near the door and stationary objects along the door's path; radar detectors emit radar waves of a specific frequency, which are received by the radar detector after hitting the target object, thus allowing the calculation of the target object's position and speed. Radar detectors are characterized by high frequency, high resolution, and low sensitivity to environmental changes. However, traditional radar detectors operate at a fixed frequency, making them susceptible to interference from environmental electromagnetic waves and electromagnetic waves generated by other devices, often resulting in false alarms or missed detections. Therefore, designing a door detection device with better reliability and anti-interference capabilities is one of the key development issues for related industries. [Summary of the Invention]

[0003] The present invention provides an operation method for a millimeter-wave radar detector based on an adjustable frequency and a gate detection device thereof to solve the above-mentioned problems.

[0004] The scope of this patent application discloses an operation method based on a millimeter-wave radar detector, applied to a gate detection device having a signal transmitter, a signal receiver, and a processing unit. The operation method includes driving the signal transmitter to output a radar signal, using the signal receiver to obtain the reflected radar signal, analyzing the radar signal and comparing it to a predetermined threshold, and determining whether to adjust an execution parameter of the signal transmitter and / or a gate judgment parameter applied to the gate detection device based on the comparison result between the radar signal and the predetermined threshold.

[0005] The claims of this invention further disclose a door segment detection device, which includes a signal transmitter, a signal receiver, and a processing unit. The signal transmitter is used to output a radar signal. The signal receiver is used to acquire the reflected radar signal. The processing unit is electrically connected to the signal transmitter and the signal receiver, and is used to drive the signal transmitter to output a radar signal, acquire the reflected radar signal using the signal receiver, analyze the radar signal to compare it with a predetermined threshold, and, based on the comparison result of the radar signal and the predetermined threshold, determine whether to adjust one of the execution parameters of the signal transmitter and / or one of the door segment judgment parameters applied in the door segment detection device.

[0006] The operating method and door segment detection device of the present invention use a millimeter-wave radar detector with frequency modulation function as a signal transmitter; the processing unit can utilize an adaptive frequency adjustment algorithm or a spectrum analysis algorithm, and adopt a periodic or irregular calibration procedure as needed to identify environmental interference. Then, based on the echo intensity of the millimeter-wave radar detector, the frequency band and / or gain of the millimeter-wave radar detector are adjusted, or the frequency band with the least interference is directly selected and adjusted accordingly, or the door segment judgment parameters are adjusted to improve the detection accuracy of the door segment detection device. Compared with the prior art, the operating method and door segment detection device of the present invention can make good use of the high-resolution characteristics of the millimeter-wave radar detector to achieve better detection accuracy, and can also dynamically adjust according to changes in application scenarios or weather conditions to provide reliable and accurate monitoring services.

Implementation Method

[0007] Please refer to Figures 1 to 3. Figure 1 is a functional block diagram of the door detection device 10 according to an embodiment of the present invention, and Figures 2 and 3 are application schematic diagrams of the door detection device 10 according to different embodiments of the present invention. The door detection device 10 may include at least a signal transmitter 12, a signal receiver 14, and a processing unit 16 that are electrically connected to each other. The signal transmitter 12 is used to output radar signals, and the signal receiver 14 obtains the radar signals reflected back from the target object (e.g., door 18 or door frame 20) by the radar signals projected onto it. The processing unit 16 can execute the operation method of the present invention to improve the detection reliability and anti-interference capability of the door detection device 10.

[0008] The door detection device 10 can accurately determine the position and state of the door, but its practical applications are not limited to this. For example, the door detection device 10 can also be used to detect other types of moving or stationary objects, such as pedestrians, animals, and vehicles. The specific variations depend on the application requirements. It can also estimate the movement path of objects by analyzing a series of detection data (e.g., determining whether a person is moving towards or away from the door). In this invention, the signal transmitter 12 is a millimeter-wave radar detector with frequency modulation function. Therefore, the door detection device 10 can dynamically adjust the operating frequency of the millimeter-wave radar detector to avoid external interference and optimize its detection performance. This can significantly improve the anti-interference capability of the millimeter-wave radar detector and ensure that the door detection device 10 can maintain stable detection quality and accuracy in a multi-interference environment.

[0009] As shown in Figure 2, the door panel 18 can rotate relative to the door frame 20 to present a closed state and an open state. The door panel detection device 10 can be optionally installed on the door panel 18 or installed in an electronic lock (not marked in the figure) on the door panel 18 to detect the relative position of the door frame 20 to provide a door panel position detection function. Alternatively, as shown in Figure 3, the door panel detection device 10 can also be optionally installed on the door frame 20 to detect the relative position of the door panel 18 to provide a door panel position detection function. The installation position of the door panel detection device 10 is not limited to the above embodiment and depends on the design requirements; therefore, other possible variations will not be described in detail here.

[0010] Please refer to Figure 4, which is a flowchart of the operation method of the embodiment of the present invention during the calibration stage. The operation method described in Figure 4 is applicable to the door panel detection device 10 shown in Figures 1 to 3. Regarding the operation method of the calibration stage, steps S100 and S102 are first executed to drive the signal transmitter 12 to output a radar signal and use the signal receiver 14 to obtain the reflected radar signal. Then, step S104 is selectively executed to perform filtering, amplification, and feature extraction processing on the reflected radar signal. Generally, when the collected radar signal strength is high, the present invention performs filtering processing first to remove noise and interference, and then amplifies the signal, which can protect the amplifier and reduce nonlinear distortion; if the collected radar signal strength is low, amplification processing can be performed first and then filtering processing can be performed to avoid noise amplification. Feature extraction processing can obtain object detection results that can describe the state of the target object (e.g., door panel 18 or door frame 20), such as reflection intensity, object distance, and object speed. The variations in the aforementioned signal processing depend on the signal characteristics and will not be explained in detail here.

[0011] Next, step S106 is executed to analyze the radar signal to obtain signal quality. If the gate detection device 10 adopts a periodic calibration procedure, steps S108 and S110 are executed to obtain the signal-to-noise ratio and / or echo intensity of the radar signal as signal quality at each predetermined calibration cycle, and compare the signal quality to a predetermined threshold. If the signal quality (i.e., signal-to-noise ratio and / or echo intensity) deviates from or exceeds the predetermined threshold signal threshold, it indicates that the poor signal quality will affect the detection accuracy of the gate detection device 10. At this time, step S112 can be executed to adjust the execution parameters of the signal transmitter 12, such as frequency band and / or gain. If the signal quality does not deviate from or exceed the predetermined threshold signal threshold, it indicates that the signal quality is stable and the gate detection device 10 still maintains appropriate detection accuracy. Then step S114 is executed without adjusting the frequency band and / or gain of the signal transmitter 12.

[0012] If the door panel detection device 10 adopts an irregular calibration procedure, steps S116 and S118 are executed to continuously obtain the changing trend of the radar signal's signal-to-noise ratio and / or echo intensity, and use the deviation of this changing trend from a predetermined threshold as the signal quality, comparing the signal quality to the predetermined threshold. If the signal quality (i.e., the deviation result) deviates from or exceeds the predetermined threshold setting standard, it indicates that the poor signal quality will affect the detection accuracy of the door panel detection device 10. At this time, an automatic calibration mechanism will be triggered to execute step S120, adjusting the execution parameters of the signal transmitter 12, such as the frequency band and / or gain. If the signal quality does not deviate from or exceed the predetermined threshold setting standard, it indicates that the signal quality is stable and the door panel detection device 10 still maintains appropriate detection accuracy. Then, step S122 is executed without adjusting the frequency band and / or gain of the signal transmitter 12.

[0013] In the periodic calibration procedure of the operation method, the predetermined calibration cycle is determined according to the application requirements of the door detection device 10. For example, the door detection device 10 can be set to be calibrated daily, weekly, or monthly, but the actual application is not limited to this. In the process of the periodic calibration procedure, the predetermined threshold can preferably be preset as a signal threshold, which can be a threshold value converted from the single error of the signal-to-noise ratio and / or echo intensity, or can be given other definitions according to design requirements. In the irregular calibration procedure of the operation method, the deviation result can be the cumulative deviation of the signal threshold whose trend deviates from the predetermined threshold; correspondingly, the predetermined threshold is preferably preset as a setting standard converted from the cumulative error of the signal-to-noise ratio and / or echo intensity. Finally, after adjusting the execution parameters of the signal transmitter 12 in steps S112 and S120, step S124 is executed to store the relevant data of the adjusted frequency band and / or gain in the storage module 22 of the door detection device 10, so that the stability and reliability of the relevant data can be verified in the subsequent door detection process.

[0014] Please refer to Figure 5, which is a flowchart of the operation method of the embodiment of the present invention in the application stage. The operation method described in Figure 5 can be applied to the door detection device 10 shown in Figures 1 to 3. Regarding the operation method in the application stage, steps S200 and S202 are first executed to drive the signal transmitter 12 to output radar signals and use the signal receiver 14 to obtain the reflected radar signals. Next, step S204 is selectively executed to filter, amplify, and extract features from the reflected radar signals to obtain object detection results; the object of the object detection results can be a door 18, a door frame 20, or a person, depending on the placement of the door detection device 10. The principles and functions of these signal processing are as described above and will not be repeated here.

[0015] Next, step S206 is selectively executed, using a preset algorithm to analyze the object detection results provided by the radar signal to establish a door panel position model. This allows the door panel reference position to be obtained based on the door panel position model and used as the door panel judgment parameter for the door panel detection device 10. Step S206 is used to obtain the judgment threshold for the door panel position (e.g., door panel judgment parameter). The operation method of this invention can use step S206 to obtain the door panel judgment parameter during the installation of the door panel detection device 10, eliminating the need to execute this step in subsequent use. Alternatively, the operation method of this invention can also selectively execute step S206 periodically or irregularly to calibrate the door panel judgment parameter, preventing the door panel 18 and / or door frame 20 from shifting position due to prolonged use, thereby affecting the detection accuracy of the door panel detection device 10.

[0016] To improve the detection accuracy of the door panel detection device 10, step S208 can be selectively executed to adjust the door panel reference position to change the door panel judgment parameters of the door panel detection device 10 without adjusting the execution parameters of the signal transmitter 12. Next, step S210 is executed to compare the object detection result provided by the radar signal with the door panel judgment parameters (corresponding to the aforementioned predetermined threshold) to determine the door panel position; the object detection result is a value calculated from the echo intensity of the radar signal. Finally, step S212 is executed to analyze the difference between the object detection result and the door panel judgment parameters using a preset algorithm to obtain the movement direction and / or position state of the target object (e.g., door panel 18 or door frame 20), thereby determining whether the door panel 18 is in a closed state (close to door frame 20) or an open state (away from door frame 20).

[0017] In summary, the operation method and door segment detection device of the present invention use a millimeter-wave radar detector with frequency modulation function as a signal transmitter; the processing unit can utilize an adaptive frequency adjustment algorithm or a spectrum analysis algorithm, and adopt periodic or irregular calibration procedures as needed to identify environmental interference. Then, based on the echo intensity of the millimeter-wave radar detector, the frequency band and / or gain of the millimeter-wave radar detector are adjusted, or the frequency band with the least interference is directly selected and adjusted accordingly, or the door segment judgment parameters are adjusted to improve the detection accuracy of the door segment detection device. Compared with prior art, the operation method and door segment detection device of the present invention can make good use of the high-resolution characteristics of the millimeter-wave radar detector to achieve better detection accuracy, and can also dynamically adjust according to changes in application scenarios or weather conditions to provide reliable and accurate monitoring services. The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be included in the scope of the present invention. [Simplified Explanation of the Diagram]

[0018] Figure 1 is a functional block diagram of the door detection device according to an embodiment of the present invention. Figures 2 and 3 are application schematic diagrams of the door detection device according to different embodiments of the present invention. Figure 4 is a flowchart of the operation method of the present invention in the calibration stage. Figure 5 is a flowchart of the operation method of the present invention in the application stage.

Claims

1. An operation method based on a millimeter-wave radar detector, applied to a gate detection device having a signal transmitter, a signal receiver, and a processing unit, the operation method comprising: the processing unit driving the signal transmitter to output a radar signal, and using the signal receiver to acquire the reflected radar signal; the processing unit analyzing the radar signal to obtain a signal quality; the processing unit confirming whether the signal quality meets a predetermined threshold; and the processing unit determining, based on a comparison result between the radar signal and the predetermined threshold, whether to adjust an execution parameter of the signal transmitter and / or a gate judgment parameter applied to the gate detection device; wherein, When the signal quality exceeds the predetermined threshold, the processor continuously acquires the change trend of one of the signal-to-noise ratios and / or one of the echo strengths of the radar signal, and calculates the deviation of the change trend from one of the predetermined thresholds as the signal quality. When it is determined that the deviation exceeds one of the predetermined thresholds, the processor adjusts one of the execution parameters of the signal transmitter, namely the frequency band and / or the gain, thereby automatically adjusting the frequency band and / or the gain of the execution parameters.

2. The operating method as described in claim 1, wherein automatically adjusting the execution parameters of the signal transmitter includes: the processing unit acquiring a signal-to-noise ratio and / or an echo intensity of the radar signal as the signal quality every predetermined correction period; and the processing unit adjusting the frequency band and / or the gain of the signal transmitter when it determines that the signal-to-noise ratio and / or the echo intensity deviates from a predetermined threshold signal threshold.

3. The operating method as described in claim 1, wherein the deviation result is the cumulative deviation of the trend of change from one of the signal thresholds of the predetermined threshold.

4. The operation method as described in claim 1 further includes: the processing unit storing the adjusted data of the frequency band and / or the gain in a storage module of the gate detection device.

5. The operation method as described in claim 1 further includes: the processing unit performs filtering and amplification processing on the radar signal; and the processing unit extracts feature parameters from the processed radar signal to obtain an object detection result.

6. The operation method as described in claim 5 further includes: the processing unit uses a preset algorithm to parse the object detection result to obtain a door panel reference position as the door panel judgment parameter.

7. The operating method as described in claim 6, wherein the processing unit adjusts the reference position of the gate segment to improve the accuracy of the gate segment detection device without adjusting the execution parameters of the signal transmitter.

8. The operation method as described in claim 5 further includes: the processing unit uses a preset algorithm to parse the object detection result and the door panel judgment parameter to obtain a movement direction and / or a position state of a target object.

9. The operating method as described in claim 1, wherein the signal transmitter is a millimeter-wave radar with frequency modulation capability.

10. A door panel detection device, comprising: a signal transmitter for outputting a radar signal; a signal receiver for acquiring the reflected radar signal; and a processing unit electrically connected to the signal transmitter and the signal receiver for performing the operation method as described in any one of claims 1 to 9.

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