The present invention is related to a motion detecting method and a motion detecting system, and more particularly, to a motion detecting method and a motion detecting system capable of reducing false alarm rate and power consumption.
Motion detecting technology has been widely used in security surveillance business. For example, a motion detector may be installed in the house entryway for alerting a user of motion in the area. Existing motion detectors normally adopt infrared (IR) sensors or microwave sensors. Since an IR sensor detects an object by picking up its infrared radiation (thermal energy), its accuracy is sensitive to environmental temperature and brightness. A microwave sensor can emit microwave radiation, and phase shifts in the reflected microwaves due to motion of an object toward (or away from) the receiver may be used to identify different motions.
Although the accuracy of microwave sensors is relatively insensitive to environmental temperature and brightness, false alarms can easily be triggered by the occurrence of a swinging tree, a small insect or a passer-by. Therefore, there is a need for a motion detecting system with low false alarm rate for security surveillance purpose.
The present invention provides a motion detecting method. The method includes an MCU operating in a first mode in response to a microwave motion sensor operating with a first configuration does not detect a first motion; the microwave motion sensor sending a first notice signal to the MCU in response to detecting the first motion with the first configuration; after receiving the first notice signal, the MCU operating in a second mode for performing a first action and sending a first configuration signal to the microwave motion sensor for instructing the microwave motion sensor to operate with a second configuration; in response to detecting a second motion within a first predetermined period after switching to operate with the second configuration, the microwave motion sensor continuing to operate with the second configuration and sending a second notice signal to the MCU for instructing the MCU to perform a second action; and in response to unable to receive the second notice signal within the first predetermined period, the MCU sending a second configuration signal to the microwave motion sensor for instructing the microwave motion sensor to operate with the first configuration and the MCU switching to operate in the first mode.
The present invention also provides a motion detecting system which includes a microwave motion sensor and an MCU. The microwave motion sensor is configured to operate with a first configuration when unable to receive a first configuration signal or when receiving a second configuration signal; operate with a second configuration when receiving the first configuration signal; send a first notice signal when detecting a first motion with the first configuration; and send a second notice signal when detecting a second motion within a first predetermined period after switching to operate with the second configuration. The MCU is configured to operate in a first mode when the microwave motion sensor operating with the first configuration does not detect the first motion; after receiving the first notice signal, switch from the first mode to a second mode for performing a first action and send the first configuration signal to the microwave motion sensor for instructing the microwave motion sensor to operate with a second configuration; after receiving a second notice signal, perform a second action and send the first configuration signal for instructing the microwave motion sensor to operate with the second configuration; and when unable to receive the second notice signal within the first predetermined period, send the second configuration signal to the microwave motion sensor for instructing the microwave motion sensor to operate with the first configuration and switch to operate in the first mode.
Below, exemplary embodiments will be described in detail with reference to accompanying drawings so as to be easily realized by a person having ordinary knowledge in the art. The inventive concept may be embodied in various forms without being limited to the exemplary embodiments set forth herein. Descriptions of well-known parts are omitted for clarity, and like reference numerals refer to like elements throughout.
In an embodiment of the present invention, the MCU 20 may operate in a first mode or in a second mode, wherein the MCU 20 consumes less power when operating in the first mode than when operating in the second mode. For example, the first mode may be a low-power mode (such as hibernate mode or standby mode), and the second mode may be a normal mode.
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In step 310, the microwave motion sensor 10 of the motion detecting system 100 (implemented as a smart doorbell) initially operates with the first configuration. In step 320, it is determined whether the microwave motion sensor 10 can detect the first motion when operating with the first configuration. The first motion may be an object entering the long-distance detecting range, an object entering the wide-range detecting range, an object entering the long-distance and wide-range detecting range, or a slow-speed/low frequency motion.
When the microwave motion sensor 10 does not detect the first motion when operating with the first configuration, the MCU 20 is configured to operate in the first mode in step 330, thereby reducing the power consumption of the motion detecting system 100.
When the microwave motion sensor 10 detects the first motion when operating with the first configuration, it indicates that an object has entered the long-distance detecting range or the wide-range detecting range, or that the object exhibits slow-speed/low frequency movement. The above-mentioned object may be a co-living relative or friend, a visitor or and a passer-by. The above-mentioned slow-speed/low frequency movement may be the walking of a passer-by. The detection of the first motion indicates an object is approaching the location of the motion detecting system 100. Under such circumstance, the microwave motion sensor 10 is configured to send the first notice signal (such as a wake-up signal) to the MCU 20 in step 340.
In step 350, after receiving the first notice signal, the MCU 20 is configured to switch from the first mode to the second mode for performing the first action, such as notifying the receiving terminal that an object is approaching the location of the motion detecting system 100, or that a slow-speed motion or a low-frequency motion has been detected at the location of the motion detecting system 100. For example, the MCU 20 may send a notification message to any pre-linked user device, such as a cell phone, a tablet computer or a personal computer, but not limited thereto. Also, the MCU 20 is configured to send the first configuration signal to the microwave motion sensor 10 for instructing the microwave motion sensor 10 to operate with the second configuration, thereby determining the identity and intention of the approaching object.
When the microwave motion sensor 10 detects the second motion when operating with the second configuration, it indicates that the above-mentioned object has entered the short-distance detecting range or the narrow-range detecting range, or that the object exhibits fast-speed/high frequency movement. For example, the detected second motion may be the hand wave of a visitor or a bell-ringing hand gesture, but not limited thereto. When the microwave motion sensor 10 does not detect the second motion within the first predetermined period after switching to operate with the second configuration, it indicates that the first motion detected with the first configuration may be caused by a passer-by and does not require attention. Therefore, the microwave motion sensor 10 is configured to send the second notice signal (such as a wake-up signal) only when detecting the second motion within the first predetermined period after switching to operate with the second configuration in step 360.
In step 370, when the MCU 20 receives the second notice signal within the first predetermined period after the microwave motion sensor 10 switches to operate with the second configuration, the MCU 20 is configured to perform the second action in step 380, such as notifying a receiving terminal that a short-distance movement event caused by the object has occurred at the location of the motion detecting system 100 or that the object exhibits a high-speed movement or a high-frequency movement. For example, the MCU 20 may send a notification message to any pre-linked user device, such as a cell phone, a tablet computer or a personal computer, but not limited thereto.
In step 370, when the MCU 20 does not receive the second notice signal within the first predetermined period after the microwave motion sensor 10 switches to operate with the second configuration, the MCU 20 is configured to send the second configuration signal to the microwave motion sensor 10 for instructing the microwave motion sensor 10 to operate with the first configuration in step 390. Also, the MCU 20 is configured to switch to operate in the first mode, thereby reducing power-consumption. Step 320 is executed again for determining whether another first motion can be detected by the microwave motion sensor 10 when operating with the first configuration.
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In step 410, the microwave motion sensor 10 of the motion detecting system 100 (implemented as a smart door lock) initially operates with the first configuration. In step 420, it is determined whether the microwave motion sensor 10 can detect the first motion when operating with the first configuration. The first motion may be an object entering the long-distance detecting range, an object entering the wide-range detecting range, an object entering the long-distance and wide-range detecting range, or a slow-speed/low-frequency motion.
When the microwave motion sensor 10 does not detect the first motion when operating with the first configuration, the MCU 20 is configured to operate in the first mode in step 430, thereby reducing the power consumption of the motion detecting system 100. Meanwhile, the actuator is set to the first state (locked state) so that the door cannot be opened. In an embodiment, the user interface may also be deactivated. In the embodiment depicted in
When the microwave motion sensor 10 detects the first motion when operating with the first configuration, it indicates that an object has entered the long-distance detecting range or the wide-range detecting range, or that the object exhibits slow-speed/low frequency movement. The above-mentioned object may be a co-living relative or friend, a visitor or and a passer-by. The above-mentioned slow-speed/low frequency movement may be the walking of a passer-by. The detection of the first motion indicates an object is approaching the location of the motion detecting system 100. Under such circumstance, the microwave motion sensor 10 is configured to send the first notice signal (such as a wake-up signal) to the MCU 20 in step 440.
In step 450, after receiving the first notice signal, the MCU 20 is configured to switch from the first mode to the second mode for performing the first action, such as activating the user interface. For example, the MCU 20 may light up the numbers on a touch panel for receiving passwords. Also, the MCU 20 is configured to send the first configuration signal to the microwave motion sensor 10 for instructing the microwave motion sensor 10 to operate with the second configuration, thereby determining the identity and the intention of the approaching object.
When the microwave motion sensor 10 detects the second motion when operating with the second configuration, it indicates that the above-mentioned object has entered the short-distance detecting range or the narrow-range detecting range, or that the object exhibits fast-speed/high-frequency movement. For example, the detected second motion may be the hand wave of a visitor or a bell-ringing hand gesture, but not limited thereto. When the microwave motion sensor 10 does not detect the second motion within the first predetermined period after switching to operate with the second configuration, it indicates that the first motion detected with the first configuration may be caused by a passer-by and does not require attention. Therefore, the microwave motion sensor 10 is configured to send the second notice signal (such as a wake-up signal) only when detecting the second motion within the first predetermined period after switching to operate with the second configuration in step 460. After receiving the second notice signal, the MCU 20 is configured to perform the second action, such as activating the timer associated with the second predetermined period.
In step 470, it is determined whether the actuator has switched from the first state (locked state) to the second state (unlocked state) when the second predetermined period has elapsed after the MCU performs the second action. If it is determined that the actuator still remains in the first state (locked state), it indicates that the second motion detected by the microwave motion sensor 10 in step 460 is not inputting the correct password via the user interface, and the microwave motion sensor 10 is then configured to determine whether the third action can be detected in step 480. When the second predetermined period has elapsed after the MCU performs the second action, if it is determined that the actuator still remains in the first state (locked state) and that the third motion can be detected, it indicates a possible burglary, such as when someone has entered incorrect passwords several times or tried to crack the door. Under such circumstance, the microwave motion sensor 10 is configured to send the third notice signal for instructing the MCU 20 to perform the third action, such as sending an alarm signal. In an embodiment, the MCU 20 may send an alarm message to any pre-linked user device, such as a cell phone, a tablet computer or a personal computer, but not limited thereto.
If it is determined that the actuator still remains in the first state (locked state) in step 470 and that the third motion is not detected in step 480, it indicates that the second motion detected by the microwave motion sensor 10 in step 460 may only be a random person passing by instead of a possible burglary. Under such circumstance, the MCU 20 is configured to send the second configuration signal to the microwave motion sensor 10 for instructing the microwave motion sensor 10 to operate with the first configuration in step 490. Also, the MCU 20 is configured to switch to operate in the first mode, thereby reducing power-consumption. The operation of the motion detecting system 100 loops back to step 420 for determining whether another first motion can be detected by the microwave motion sensor 10 when operating with the first configuration.
If it is determined that the actuator has switched from the first state (locked state) to the second state (unlocked state) in step 470, it indicates that the second motion detected by the microwave motion sensor 10 in step 460 is someone inputting the correct password via the user interface, such as a co-living relative or friend opening the door. Under such circumstance, the MCU 20 is configured to send the second configuration signal to the microwave motion sensor 10 for instructing the microwave motion sensor 10 to operate with the first configuration in step 490. Also, the MCU 20 is configured to switch to operate in the first mode, thereby reducing power-consumption. The operation of the motion detecting system 100 loops back to step 420 for determining whether another first motion can be detected by the microwave motion sensor 10 when operating with the first configuration.
In conclusion, the motion detecting system 100 of the present invention can provide multi-step motion detection for home security application. After detecting the first motion with the first configuration, the microwave motion sensor 10 is configured to operate with the second configuration for detecting the second/third motion. The MCU 20 is configured to operate in different modes for performing corresponding actions based on whether the microwave motion sensor can detect actions with different configurations, thereby reducing power consumption. The present motion detecting system can determine the type of motions detected by the microwave motion sensor 10, thereby reducing the false alarm rate.
Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention. Accordingly, the above disclosure should be construed as limited only by the metes and bounds of the appended claims.
Number | Date | Country | Kind |
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111134040 | Sep 2022 | TW | national |
This application claims the benefit of U.S. Provisional Application No. 63/340,474, filed on May 11, 2022. The content of the application is incorporated herein by reference.
Number | Date | Country | |
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63340474 | May 2022 | US |