Micropower microwave sensor and discontinuous Doppler signal micropower control method

Abstract

The present invention belongs to the technical field of microwave sensors, and in particular, relates to a micro-power microwave sensor and a discontinuous Doppler signal micro-power control method, including: a Doppler microwave module, which is used to detect an object to be detected in a preset detection area during operation, and generate an original analog signal according to the object to be detected; a microwave main control module, which is connected to the Doppler microwave module and is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal, and receives the original analog signal generated by the Doppler microwave module; the microwave main control module reawakens after a specific wake-up time after entering a dormant state. The present invention realizes the wake-up-processing-signal-sleeping working mode of the microwave main control module, that is, the microwave main control module also works intermittently, thereby greatly improving the low power consumption effect and meeting the use requirements.

Description

Technical Field

[0001] The invention belongs to the technical field of microwave sensors, and in particular relates to a micro-power consumption microwave sensor and a discontinuous Doppler signal micro-power consumption control method. Background Art

[0002] Microwave sensors, also known as microwave radars, are instruments made using the Doppler principle of electromagnetic waves. Microwave sensors require a relatively large control current for battery power during use, which means that current microwave sensors have a high operating loss problem.

[0003] Based on the power consumption problem, low-power solutions have appeared on the market. For example, the utility model patent with application number CN201922205092.8 discloses a low-power microwave sensor and its control circuit, including a microwave module, a control module and a voltage stabilizing module. The control module includes a first control chip U1, and the voltage stabilizing module includes a second control chip U2. Pin 5 of the first control chip U1 is connected to pin 3 of the second control chip U2, and pin 5 of the second control chip U2 is connected to the microwave module.

[0004] Although the above technical solution controls the second control chip U2 through the intermittent signal output of the first control chip U1, thereby controlling the microwave module to intermittently transmit signals, that is, realizing the intermittent operation of the microwave sensor and reducing the working loss of the microwave sensor, there are still problems. It only reduces the power consumption of the microwave module, and the amplified analog signal after amplification still has continuity. Therefore, the first control chip needs to collect and analyze the signal all the time, so it is always in a working state, which still leads to the problem of high power consumption and affects the low power consumption effect. Summary of the invention

[0005] The purpose of the present invention is to provide a micro-power microwave sensor and a discontinuous Doppler signal micro-power control method, aiming to solve the technical problem in the prior art that the microwave sensor has a poor low power consumption effect due to the continuous operation of the main control chip.

[0006] To achieve the above object, an embodiment of the present invention provides a micro-power consumption microwave sensor, comprising:

[0007] A Doppler microwave module, wherein the Doppler microwave module is used to detect an object to be detected within a preset detection area during operation, and to generate an original analog signal according to the object to be detected;

[0008] A microwave main control module, the microwave main control module is connected to the Doppler microwave module and is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal, and receives the original analog signal generated by the Doppler microwave module;

[0009] The microwave main control module is also used to enter a dormant state after processing the original analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

[0010] Optionally, the microwave main control module includes a signal amplification and filtering module and a single-chip microcomputer driving module; wherein,

[0011] The signal amplification and filtering module is connected to both the Doppler microwave module and the single-chip microcomputer driving module, and is used to receive the original analog signal generated by the Doppler microwave module, and generate an amplified analog signal after amplifying the original analog signal, so as to send the amplified analog signal to the single-chip microcomputer driving module;

[0012] The single-chip microcomputer driving module is connected to the Doppler microwave module and is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal;

[0013] The single-chip microcomputer driving module is also used to send a pulse switch signal to the signal amplifying and filtering module while sending a pulse power supply signal to the Doppler microwave module, and control the connection of the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that when the Doppler microwave module is working, the original analog signal generated by the Doppler microwave module is transmitted to the signal amplifying and filtering module, and when the Doppler microwave module is not working, the connection channel between the Doppler microwave module and the signal amplifying and filtering module is turned off;

[0014] The single chip microcomputer driving module is also used to enter a dormant state after processing the amplified analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

[0015] Optionally, the single-chip microcomputer driving module includes a single-chip microcomputer module and a pulse driving module; wherein,

[0016] The pulse driving module is connected to the single chip computer module, the signal amplifying module and the Doppler microwave module, and is used to send a pulse power supply signal to the Doppler microwave module, so that the Doppler microwave module works when receiving the pulse power supply signal;

[0017] The pulse driving module is also used to send a pulse switch signal to the signal amplifying module, and control the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that when the Doppler microwave module is working, the original analog signal generated is transmitted to the signal amplifying and filtering module, and when the Doppler microwave module is not working, the connection channel between the Doppler microwave module and the signal amplifying and filtering module is turned off;

[0018] The single chip computer module is connected to the pulse driving module and the signal amplifying and filtering module, and is used to send a pulse signal to the pulse driving module, so as to control the pulse driving module to send a pulse power supply signal based on the pulse signal and send a pulse switch signal to the signal amplifying and filtering module at the same time;

[0019] The single chip microcomputer module is also used to enter a dormant state after processing the amplified analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

[0020] Optionally, an AD converter is provided in the single chip microcomputer module, and the AD converter is used to perform analog-to-digital conversion on the amplified analog signal at a preset specific time after the pulse driving module sends the pulse power supply signal, and generate a digital signal after the analog-to-digital conversion is completed.

[0021] Optionally, it also includes an output module, which is connected to the single-chip computer module and is used to connect to an external controlled device. The single-chip computer module is also used to determine whether there is a dynamic object to be measured in the preset detection area based on the digital signal. If the single-chip computer module determines that there is a dynamic object to be measured, a dynamic trigger signal is generated and sent to the external controlled device via the output module.

[0022] The above one or more technical solutions in the micro-power consumption microwave sensor provided by the embodiment of the present invention have at least one of the following technical effects:

[0023] On the one hand, the present invention transmits a pulse power supply signal to the Doppler microwave module when the microwave main control module is awakened, and the Doppler microwave module works when receiving the pulse power supply signal, and does not work when not receiving the pulse power supply signal, so that the Doppler microwave module works intermittently, thereby reducing power consumption; on the other hand, by setting the specific wake-up time, the microwave main control module is awakened after each interval of the specific wake-up time, and sends a pulse power supply signal when awakening to make the Doppler microwave module work, and enters a dormant state after processing the original analog signal, thereby realizing the wake-up-signal processing-sleep working mode of the microwave main control module, that is, the microwave main control module also works intermittently, thereby greatly improving the low power consumption effect and meeting the use requirements.

[0024] To achieve the above object, an embodiment of the present invention provides a discontinuous Doppler signal micro-power consumption control method, the discontinuous Doppler signal micro-power consumption control method is based on the above-mentioned micro-power consumption microwave sensor, and the method includes:

[0025] Step S100: the microwave main control module sends a pulse power supply signal to the Doppler microwave module;

[0026] Step S200: the microwave main control module controls the Doppler microwave module based on the pulse power supply signal to not work when the pulse power supply signal is not received, and to detect the object under test in the preset detection area when the pulse power supply signal is received to work, and generates an original analog signal according to the object under test;

[0027] Step S300: the Doppler microwave module sends the original analog signal to the microwave main control module, the microwave main control module processes the original analog signal and enters a dormant state, and wakes up again after a specific wake-up time after entering the dormant state.

[0028] Optionally, the microwave main control module includes a signal amplification and filtering module and a single-chip microcomputer driving module, the signal amplification and filtering module is connected to both the Doppler microwave module and the single-chip microcomputer driving module, and the single-chip microcomputer driving module is connected to the Doppler microwave module;

[0029] Step S300: the Doppler microwave module sends the original analog signal to the microwave main control module, the microwave main control module processes the original analog signal and enters a dormant state, and wakes up again after a specific wake-up time after entering the dormant state, specifically including:

[0030] Step S310: the single-chip microcomputer driving module sends a pulse power supply signal to the Doppler microwave module and simultaneously sends a pulse switch signal to the signal amplification and filtering module;

[0031] Step S320: the single-chip microcomputer driving module controls the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that the original analog signal generated by the Doppler microwave module is transmitted to the signal amplifying and filtering module;

[0032] Step S330: the signal amplification and filtering module amplifies the original analog signal to generate an amplified analog signal, and sends the amplified analog signal to the single-chip microcomputer driving module;

[0033] Step S340: the single-chip microcomputer driving module enters a dormant state after processing the amplified analog signal, and wakes up again after a specific wake-up time after entering the dormant state.

[0034] Optionally, step S340: the single-chip microcomputer driving module enters a dormant state after processing the amplified analog signal, and wakes up again after a specific wake-up time after entering the dormant state; specifically includes:

[0035] Step 341: the AD converter built into the single-chip microcomputer module in the single-chip microcomputer driving module performs analog-to-digital conversion processing on the amplified analog signal at a preset specific time after the pulse driving module sends the pulse power supply signal, and generates a digital signal after the analog-to-digital conversion processing is completed, wherein the AD converter is not started in the time period between when the pulse driving module sends the pulse power supply signal and the preset specific time after the pulse driving module sends the pulse power supply signal;

[0036] Step 342: the single-chip microcomputer module in the single-chip microcomputer driving module determines whether there is a dynamic detected object in the preset detection area according to the digital signal. If the single-chip microcomputer module determines that there is a dynamic detected object, a dynamic trigger signal is generated, and the dynamic trigger signal is sent to the external controlled device through the output module. Then, the single-chip microcomputer module enters a dormant state.

[0037] Step 343: If the single-chip microcomputer module determines that the digital signal is not a static background digital signal, the single-chip microcomputer module enters a dormant state;

[0038] Step 344: After the single-chip microcomputer module enters the sleep state, the single-chip microcomputer module wakes up again after a specific wake-up time.

[0039] Optionally, the time interval between the Doppler microwave module receiving adjacent pulse power supply signals is the pulse power supply interval length, the duration of the pulse power supply signal is the power supply time length; and the pulse power supply interval length is much longer than the power supply time length.

[0040] Optionally, in step S342: if the single chip microcomputer module determines that the answer is yes, the method specifically includes:

[0041] Step S3421: If the change amplitude of the digital signal is less than or equal to the first preset amplitude, then the judgment is no;

[0042] Step S3422: If the change amplitude of the digital signal is greater than the first preset amplitude, it is judged as yes.

[0043] The above one or more technical solutions in the method for controlling micro-power consumption of a discontinuous Doppler signal provided by the embodiment of the present invention have at least one of the following technical effects:

[0044] The discontinuous Doppler signal micro-power consumption control method of the present invention first sends a pulse power supply signal to the Doppler microwave module through the microwave main control module; then, the microwave main control module controls the Doppler microwave module based on the pulse power supply signal so that it does not work when the pulse power supply signal is not received, and detects the object to be tested in a preset detection area when the pulse power supply signal is received and works, and generates an original analog signal according to the object to be tested; finally, the Doppler microwave module sends the original analog signal to the microwave main control module, and the microwave main control module enters a dormant state after processing the original analog signal, and wakes up again after a specific wake-up time after entering the dormant state, and on the one hand, the microwave main control module is used to wake up the object to be tested. A pulse power supply signal is sent to the Doppler microwave module, and the Doppler microwave module works when the pulse power supply signal is received, and does not work when the pulse power supply signal is not received, so that the Doppler microwave module works intermittently, thereby reducing power consumption; on the other hand, by setting the specific wake-up time, the microwave main control module is awakened after each interval of the specific wake-up time, and a pulse power supply signal is sent when awakening to make the Doppler microwave module work, and enters a sleep state after processing the original analog signal, thereby realizing the wake-up-signal processing-sleep working mode of the microwave main control module, that is, the microwave main control module also works intermittently, thereby greatly improving the low power consumption effect and meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0046] Figure 1 The overall structural block diagram of the micro-power microwave sensor provided by the embodiment of the present invention;

[0047] Figure 2 An overall structural block diagram of a micro-power microwave sensor provided by another embodiment of the present invention;

[0048] Figure 3 A waveform diagram of the pulse power supply signal and the on-off of the analog signal provided in the embodiment of the present invention;

[0049] Figure 4 The overall structural block diagram of the micro-power consumption microwave sensor provided by the third embodiment of the present invention;

[0050] Figure 5 Waveform diagram of a pulse power supply signal and an amplified analog signal in a dynamic environment provided by an embodiment of the present invention;

[0051] Figure 6 A schematic flow chart of a method for controlling micro-power consumption of a discontinuous Doppler signal provided by an embodiment of the present invention;

[0052] Figure 7 A schematic diagram of a process flow of a microwave main control module entering a dormant state after processing an original analog signal provided by an embodiment of the present invention;

[0053] Figure 8 A schematic diagram of a flow chart of a single chip microcomputer driving module processing and amplifying analog signals provided by an embodiment of the present invention;

[0054] Fig. 9 A waveform diagram of the time interval between adjacent pulse power supply signals provided by an embodiment of the present invention;

[0055] Fig.10 A schematic diagram of a flow chart of a single chip microcomputer module provided in an embodiment of the present invention determining whether there is a dynamic object to be measured. DETAILED DESCRIPTION

[0056] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0057] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0060] In one embodiment of the present invention, Figure 1 As shown, a micro-power consumption microwave sensor is provided, including a Doppler microwave module, a microwave main control module and a microwave main control module.

[0061] The Doppler microwave module is used to detect the object to be detected in the preset detection area during operation, and to generate an original analog signal according to the object to be detected. The microwave main control module is connected to the Doppler microwave module, and the microwave main control module is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal. The microwave main control module is also used to receive the original analog signal generated by the Doppler microwave module; the microwave main control module is also used to enter a dormant state after processing the original analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

[0062] Therefore, on the one hand, the present invention transmits a pulse power supply signal to the Doppler microwave module when waking up, and the Doppler microwave module works when receiving the pulse power supply signal, and does not work when not receiving the pulse power supply signal, so that the Doppler microwave module works intermittently, thereby reducing power consumption; on the other hand, by setting the specific wake-up time, the microwave main control module is awakened after each interval of the specific wake-up time, and sends a pulse power supply signal when waking up to make the Doppler microwave module work, and enters a sleep state after processing the original analog signal, thereby realizing the wake-up-signal processing-sleep working mode of the microwave main control module, that is, the microwave main control module also works intermittently, thereby greatly improving the low power consumption effect and meeting the use requirements.

[0063] In another embodiment of the present invention, Figure 1-Figure 2 As shown, the microwave main control module includes a signal amplification and filtering module and a single-chip microcomputer driving module.

[0064] The signal amplification and filtering module is connected to both the Doppler microwave module and the single-chip microcomputer driving module, and is used to receive the original analog signal generated by the Doppler microwave module. The signal amplification and filtering module is also used to generate an amplified analog signal after amplifying the original analog signal, so as to send the amplified analog signal to the single-chip microcomputer driving module.

[0065] The single chip microcomputer driving module is connected to the Doppler microwave module and is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal.

[0066] The single-chip microcomputer driving module is also used to send a pulse switch signal to the signal amplifying and filtering module while sending a pulse power supply signal to the Doppler microwave module. The single-chip microcomputer driving module is also used to control the connection of the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that the original analog signal generated by the Doppler microwave module is transmitted to the signal amplifying and filtering module. That is, when the single-chip microcomputer driving module sends a pulse power supply signal to the Doppler microwave module, it also sends a pulse switch signal to the signal amplifying and filtering module, so that when the Doppler microwave module is working, the original analog signal generated is transmitted to the signal amplifying and filtering module, and when the Doppler microwave module is not working, the connection channel between the Doppler microwave module and the signal amplifying and filtering module is turned off.

[0067] In this way, based on the setting of the pulse switch signal, the transmission control of the original analog signal is realized, so that when the Doppler microwave module is not working, a capacitor is also set at the input end of the signal amplification and filtering module, and the charge accumulated by the set capacitor can be maintained until the next working pulse of the Doppler microwave module.

[0068] More specifically, in order to more accurately control and reduce power consumption as much as possible, the present invention further provides a pulse switch signal and the signal amplification module to control the conduction between the Doppler microwave module and the signal amplification and filtering module based on the pulse switch signal, thereby achieving lower power consumption control. Different from the prior art, the present embodiment adds control of the conduction between the Doppler microwave module and the signal amplification and filtering module, thereby enabling more accurate control of the conduction time and power consumption.

[0069] For further information, see Figure 3 , Figure 3 It is the waveform diagram of the pulse power supply signal and the analog signal on and off. Figure 3In the figure, the high level in the figure marked with number 1 indicates that a pulse power supply signal is provided, and the high level in the figure marked with number 2 indicates that the channel between the Doppler microwave module and the signal amplification and filtering module is connected. Figure 3 “Analog signal on / off” is marked in the figure.

[0070] Figure 3 Each space in represents 5us, so the duration of a single pulse power supply signal is about 15us. Figure 3 It can be seen that the duration of a single pulse power supply signal is slightly longer than the on-off time of the analog signal. Since a filter capacitor is set in the actual hardware circuit, the power supply is maintained for a period of time based on the filter capacitor. The power supply time of the filter capacitor is the lag time, which is about 2-3us in this embodiment.

[0071] The single chip microcomputer driving module is also used to enter a dormant state after processing the amplified analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

[0072] In another embodiment of the present invention, Figure 4 As shown, the single-chip microcomputer driving module includes a single-chip microcomputer module and a pulse driving module.

[0073] The pulse driving module is connected to the single chip computer module, the signal amplifying module and the Doppler microwave module. The pulse driving module is used to send a pulse power supply signal to the Doppler microwave module so that the Doppler microwave module works when receiving the pulse power supply signal.

[0074] The pulse driving module is also used to send a pulse switching signal to the signal amplifying module, and based on the pulse switching signal, control the connection channel between the Doppler microwave module and the signal amplifying and filtering module to be turned on, thereby transmitting the original analog signal generated by the Doppler microwave module to the signal amplifying and filtering module.

[0075] The single chip microcomputer module is connected to the pulse driving module and the signal amplifying and filtering module, and is used to send a pulse signal to the pulse driving module. The single chip microcomputer module also controls the pulse driving module to send a pulse switch signal to the signal amplifying and filtering module while sending a pulse power supply signal based on the pulse signal.

[0076] The single chip microcomputer module is also used to enter a dormant state after processing the amplified analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

[0077] In another embodiment of the present invention, an AD converter (not shown) is provided in the single chip microcomputer module, and the AD converter is used to perform analog-to-digital conversion on the amplified analog signal at a preset specific time after the pulse driving module sends the pulse power supply signal, and generate a digital signal after the analog-to-digital conversion is completed.

[0078] In this embodiment, the AD converter is started after the pulse driving module sends a pulse power supply signal and after the preset specific time has passed. That is, the AD converter is not started during the time period between the time when the pulse driving module sends the pulse power supply signal and the preset specific time after the pulse driving module sends the pulse power supply signal. During this time period, local devices in the single-chip microcomputer module are put into sleep mode, thereby further reducing power consumption.

[0079] That is, compared with the low-power control method in the prior art that sets the overall module to work intermittently, the present invention adopts a method of setting a part of the devices (such as the main control chip in the single-chip microcomputer module) inside the overall module to work, while the other part of the devices (AD converter) is only started when the signal needs to be processed, thereby further reducing the power consumption without affecting the overall function of the module, achieving a better low-power effect.

[0080] For further information, see Figure 5 , Figure 5 Waveform diagram of pulse power signal and amplified analog signal under dynamic environment. Figure 3 Each space in represents 500us. Figure 3 It can be seen that after the pulse power supply signal ends, the amplified analog signal reaches a peak value about 1.1ms later, that is, after the pulse power supply is completed, the microcontroller module lags 1.1ms to perform AD sampling through the AD converter and obtains the signal point with the largest amplitude difference from the static environment.

[0081] In this way, the single chip microcomputer can not turn on the AD converter within 1.1ms after the pulse power supply is completed, thereby further reducing power consumption. That is, in this embodiment, the preset specific time is 1.1ms.

[0082] Of course, the preset specific time can be set not only to 1.1ms, but can be set as needed according to different circuit hardware structures, and this application does not make any specific limitation.

[0083] In addition, since the amplified analog signal is similar to a sine wave signal, the time node at which its peak occurs is generally fixed. Therefore, AD conversion is performed at the time node at which the peak of the amplified analog signal occurs. Converting the amplified analog signal into a digital signal can more accurately obtain dynamic signals, while meeting low power consumption requirements and accurately obtaining dynamic signals.

[0084] In another embodiment of the present invention, if the amplified analog signal is strong enough, the preset specific time can be pre-set to 0.6ms during design. For example, the single-chip microcomputer starts the AD converter with a fixed delay of 0.6ms and performs AD conversion. At this time, although the amplified analog signal has not reached the strongest moment, it is sufficient to determine whether there is a dynamic object under test. Then, based on this method, compared with the preset specific time of 1.1ms, the single-chip microcomputer module in this embodiment can complete the AD conversion and trigger judgment 0.5ms in advance, and then enter the sleep state 0.5ms in advance, thereby further reducing power consumption.

[0085] In another embodiment of the present invention, Figure 4 As shown, the micro-power microwave sensor also includes an output module, which is connected to the single-chip computer module. The output module is used to connect to an external controlled device. The single-chip computer module is also used to determine whether there is a dynamic object to be detected in the preset detection area according to the digital signal. If the single-chip computer module determines that there is a dynamic object to be detected, a dynamic trigger signal is generated, and the dynamic trigger signal is sent to the external controlled device via the output module.

[0086] In this embodiment, the external controlled device can be specifically selected as a wireless communication module, and at the same time, it can be powered by a battery in conjunction with the micro-power microwave sensor. Furthermore, when the wireless communication module is used as an output module, a wiring-free installation method is realized, which greatly reduces the difficulty of installation and can adapt to more usage scenarios.

[0087] In addition, the micro-power microwave sensor can be linked with a device with higher power consumption to reduce the energy consumption of the device. For example, when the output module is connected to a surveillance camera by wire or wirelessly, the micro-power microwave sensor is used to control the operation of the surveillance camera. When the micro-power microwave sensor detects that the environment is static, the surveillance camera stops working. When the micro-power microwave sensor detects that the environment is dynamic, the surveillance camera starts working.

[0088] In another embodiment of the present invention, Figure 5 As shown, the present invention also provides a discontinuous Doppler signal micro-power consumption control method, the discontinuous Doppler signal micro-power consumption control method is based on the above-mentioned micro-power consumption microwave sensor, and the method includes:

[0089] Step S100: the microwave main control module sends a pulse power supply signal to the Doppler microwave module;

[0090] Step S200: the microwave main control module controls the Doppler microwave module based on the pulse power supply signal to not work when the pulse power supply signal is not received, and to detect the object under test in the preset detection area when the pulse power supply signal is received to work, and generates an original analog signal according to the object under test;

[0091] Step S300: the Doppler microwave module sends the original analog signal to the microwave main control module, the microwave main control module processes the original analog signal and enters a dormant state, and wakes up again after a specific wake-up time after entering the dormant state.

[0092] On the one hand, the present invention transmits a pulse power supply signal to the Doppler microwave module when the microwave main control module is awakened, and the Doppler microwave module works when receiving the pulse power supply signal, and does not work when not receiving the pulse power supply signal, so that the Doppler microwave module works intermittently, thereby reducing power consumption; on the other hand, by setting the specific wake-up time, the microwave main control module is awakened after each interval of the specific wake-up time, and sends a pulse power supply signal when awakening to make the Doppler microwave module work, and enters a dormant state after processing the original analog signal, thereby realizing the wake-up-signal processing-sleep working mode of the microwave main control module, that is, the microwave main control module also works intermittently, thereby greatly improving the low power consumption effect and meeting the use requirements.

[0093] In another embodiment of the present invention, Figure 2 and Figure 7 As shown, the microwave main control module includes a signal amplification and filtering module and a single-chip microcomputer driving module, the signal amplification and filtering module is connected to both the Doppler microwave module and the single-chip microcomputer driving module, and the single-chip microcomputer driving module is connected to the Doppler microwave module;

[0094] Step S300: the Doppler microwave module sends the original analog signal to the microwave main control module, the microwave main control module processes the original analog signal and enters a dormant state, and wakes up again after a specific wake-up time after entering the dormant state, specifically including:

[0095] Step S310: the single-chip microcomputer driving module sends a pulse power supply signal to the Doppler microwave module and simultaneously sends a pulse switch signal to the signal amplification and filtering module;

[0096] Step S320: the single-chip microcomputer driving module controls the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that the original analog signal generated by the Doppler microwave module is transmitted to the signal amplifying and filtering module;

[0097] Step S330: the signal amplification and filtering module amplifies the original analog signal to generate an amplified analog signal, and sends the amplified analog signal to the single-chip microcomputer driving module;

[0098] Step S340: the single-chip microcomputer driving module enters a dormant state after processing the amplified analog signal, and wakes up again after a specific wake-up time after entering the dormant state.

[0099] In this embodiment, the specific wake-up time can be set as needed, thereby ensuring that the microwave main control module is awakened after each interval of the specific wake-up time, and sends a pulse power supply signal to make the Doppler microwave module work when awakened, and enters a sleep state after processing the original analog signal, thereby realizing the wake-up-signal processing-sleep working mode of the microwave main control module, that is, the microwave main control module also works intermittently, thereby greatly improving the low power consumption effect.

[0100] In another embodiment of the present invention, Figure 8 As shown, step S340: the single-chip microcomputer driving module enters a dormant state after processing the amplified analog signal, and wakes up again after a specific wake-up time after entering the dormant state; specifically includes:

[0101] Step 341: the AD converter built into the single-chip microcomputer module in the single-chip microcomputer driving module performs analog-to-digital conversion processing on the amplified analog signal at a preset specific time after the pulse driving module sends the pulse power supply signal, and generates a digital signal after the analog-to-digital conversion processing is completed, wherein the AD converter is not started in the time period between when the pulse driving module sends the pulse power supply signal and the preset specific time after the pulse driving module sends the pulse power supply signal;

[0102] Among them, compared with the low-power control method in the prior art by setting up an overall module to perform intermittent work, the present invention adopts a method of setting up a part of the devices (such as the main control chip in the single-chip microcomputer module) inside the overall module to work, while the other part of the devices (AD converter) is only started when the signal needs to be processed, thereby achieving further reduction of power consumption without affecting the overall function of the module, and achieving better low-power consumption effect.

[0103] Step 342: the single-chip microcomputer module in the single-chip microcomputer driving module determines whether there is a dynamic detected object in the preset detection area according to the digital signal. If the single-chip microcomputer module determines that there is a dynamic detected object, a dynamic trigger signal is generated, and the dynamic trigger signal is sent to the external controlled device through the output module. Then, the single-chip microcomputer module enters a dormant state.

[0104] Step 343: If the single-chip microcomputer module determines that the digital signal is not a static background digital signal, the single-chip microcomputer module enters a dormant state;

[0105] Through the setting of step S342 and step S343, no matter whether the single-chip microcomputer module determines whether there is a dynamic object to be detected in the preset detection area, it will enter the sleep state after the determination is completed, thereby reducing power consumption.

[0106] Step 344: After the single-chip microcomputer module enters the sleep state, the single-chip microcomputer module wakes up again after a specific wake-up time.

[0107] In another embodiment of the present invention, the time interval between the Doppler microwave module receiving adjacent pulse power supply signals is the pulse power supply interval length, the duration of the pulse power supply signal is the power supply time length; and the pulse power supply interval length is much longer than the power supply time length.

[0108] like Fig. 9 As shown, Fig. 9 A waveform diagram showing the time interval between adjacent pulse power supply signals. Figure 3 Each grid represents 50ms. Fig. 9 It can be seen that the time interval of the pulse power supply signal is 250ms. The time length occupied by the pulse power supply signal is very short, about 0.015ms, so at this time the pulse power supply interval length is much longer than the power supply time length, or it can be understood that the duration of a single pulse power supply signal is very short, and the time interval between two adjacent pulse power supply signals is very long, that is, compared with the Doppler signal in the prior art which is similar to a continuous sine wave signal, the discontinuous Doppler signal in this application is an intermittent signal completely different from the continuous signal, specifically similar to a discontinuous pulse, so the generated amplified analog signal does not have continuity, and then there is no need for the single-chip microcomputer module to always perform signal processing, thereby further reducing the power consumption of the single-chip microcomputer module, improving the low power consumption efficiency, and meeting the low power consumption requirements.

[0109] In another embodiment of the present invention, Fig.10 As shown, in step S342: if the single chip microcomputer module determines that it is yes, it specifically includes:

[0110] Step S3421: If the change amplitude of the digital signal is less than or equal to the first preset amplitude, then the judgment is no;

[0111] Step S3422: If the change amplitude of the digital signal is greater than the first preset amplitude, it is judged as yes.

[0112] In this embodiment, the first preset amplitude is pre-set, and when the change amplitude is below the first preset amplitude value, it can be judged that the current environment is a static environment, and no dynamic objects or personnel have entered the preset detection area of ​​the micro-power microwave sensor; if the current environment is a static environment, the current digital signal can be stored as a static background digital signal.

[0113] In another embodiment of the present invention, the digital signals of multiple frames in the static environment segment may be averaged and stored as the static background digital signal.

[0114] When the micro-power microwave sensor is powered on for the first time, there is no static background digital signal, so the first frame of digital signal can be stored as the static background digital signal.

[0115] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A micro-power consumption microwave sensor, characterized in that: include: A Doppler microwave module, wherein the Doppler microwave module is used to detect an object to be detected within a preset detection area during operation, and to generate an original analog signal according to the object to be detected; A microwave main control module, the microwave main control module is connected to the Doppler microwave module and is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal, and receives the original analog signal generated by the Doppler microwave module; The microwave main control module is also used to enter a dormant state after processing the original analog signal, and to wake up again after a specific wake-up time after entering the dormant state; The microwave main control module includes a signal amplification and filtering module and a single-chip microcomputer driving module; wherein, The signal amplification and filtering module is connected to both the Doppler microwave module and the single-chip microcomputer driving module, and is used to receive the original analog signal generated by the Doppler microwave module, and generate an amplified analog signal after amplifying the original analog signal, so as to send the amplified analog signal to the single-chip microcomputer driving module; The single-chip microcomputer driving module is connected to the Doppler microwave module and is used to send a pulse power supply signal to the Doppler microwave module when awakened, so that the Doppler microwave module works when receiving the pulse power supply signal; The single-chip microcomputer driving module is also used to send a pulse switch signal to the signal amplifying and filtering module while sending a pulse power supply signal to the Doppler microwave module, and control the connection of the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that when the Doppler microwave module is working, the original analog signal generated by the Doppler microwave module is transmitted to the signal amplifying and filtering module, and when the Doppler microwave module is not working, the connection channel between the Doppler microwave module and the signal amplifying and filtering module is turned off; The single-chip microcomputer driving module is also used to enter a dormant state after processing the amplified analog signal, and to wake up again after a specific wake-up time after entering the dormant state; A capacitor is also provided at the input end of the signal amplification and filtering module, and the charge accumulated by the provided capacitor is maintained until the next working pulse of the Doppler microwave module.

2. The micro-power consumption microwave sensor according to claim 1, characterized in that: The single-chip microcomputer driving module includes a single-chip microcomputer module and a pulse driving module; wherein, The pulse driving module is connected to the single chip computer module, the signal amplification and filtering module and the Doppler microwave module, and is used to send a pulse power supply signal to the Doppler microwave module, so that the Doppler microwave module works when receiving the pulse power supply signal; The pulse driving module is also used to send a pulse switch signal to the signal amplifying and filtering module, and control the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that when the Doppler microwave module is working, the original analog signal generated is transmitted to the signal amplifying and filtering module, and when the Doppler microwave module is not working, the connection channel between the Doppler microwave module and the signal amplifying and filtering module is turned off; The single chip computer module is connected to the pulse driving module and the signal amplifying and filtering module, and is used to send a pulse signal to the pulse driving module, so as to control the pulse driving module to send a pulse power supply signal based on the pulse signal and send a pulse switch signal to the signal amplifying and filtering module at the same time; The single chip microcomputer module is also used to enter a dormant state after processing the amplified analog signal, and to wake up again after a specific wake-up time after entering the dormant state.

3. The micro-power consumption microwave sensor according to claim 2, characterized in that: The single chip microcomputer module is provided with an AD converter, which is used to perform analog-to-digital conversion processing on the amplified analog signal at a preset specific time after the pulse driving module sends the pulse power supply signal, and generate a digital signal after the analog-to-digital conversion processing is completed.

4. The micro-power consumption microwave sensor according to claim 3, characterized in that: It also includes an output module, which is connected to the single-chip computer module. The output module is used to connect to an external controlled device. The single-chip computer module is also used to determine whether there is a dynamic object to be detected in the preset detection area based on the digital signal. If the single-chip computer module determines that there is a dynamic object to be detected, a dynamic trigger signal is generated and sent to the external controlled device via the output module.

5. A method for controlling micro-power consumption of a discontinuous Doppler signal, characterized in that: The discontinuous Doppler signal micro-power consumption control method is performed based on the micro-power consumption microwave sensor according to any one of claims 1 to 4, and the method comprises: Step S100: the microwave main control module sends a pulse power supply signal to the Doppler microwave module; Step S200: the microwave main control module controls the Doppler microwave module based on the pulse power supply signal to not work when the pulse power supply signal is not received, and to detect the object under test in the preset detection area when the pulse power supply signal is received to work, and generates an original analog signal according to the object under test; Step S300: the Doppler microwave module sends the original analog signal to the microwave main control module, the microwave main control module processes the original analog signal and enters a dormant state, and wakes up again after a specific wake-up time after entering the dormant state.

6. The method for controlling micro-power consumption of a discontinuous Doppler signal according to claim 5, characterized in that: The microwave main control module includes a signal amplification and filtering module and a single-chip microcomputer driving module, the signal amplification and filtering module is connected to both the Doppler microwave module and the single-chip microcomputer driving module, and the single-chip microcomputer driving module is connected to the Doppler microwave module; Step S300: the Doppler microwave module sends the original analog signal to the microwave main control module, the microwave main control module processes the original analog signal and enters a dormant state, and wakes up again after a specific wake-up time after entering the dormant state, specifically including: Step S310: the single-chip microcomputer driving module sends a pulse power supply signal to the Doppler microwave module and simultaneously sends a pulse switch signal to the signal amplification and filtering module; Step S320: the single-chip microcomputer driving module controls the connection channel between the Doppler microwave module and the signal amplifying and filtering module based on the pulse switch signal, so that the original analog signal generated by the Doppler microwave module is transmitted to the signal amplifying and filtering module; Step S330: the signal amplification and filtering module amplifies the original analog signal to generate an amplified analog signal, and sends the amplified analog signal to the single-chip microcomputer driving module; Step S340: the single-chip microcomputer driving module enters a dormant state after processing the amplified analog signal, and wakes up again after a specific wake-up time after entering the dormant state.

7. The method for controlling micro-power consumption of a discontinuous Doppler signal according to claim 6, characterized in that: Step S340: the single-chip microcomputer driving module enters a dormant state after processing the amplified analog signal, and wakes up again after a specific wake-up time after entering the dormant state; specifically, it includes: Step 341: the AD converter built into the single-chip microcomputer module in the single-chip microcomputer driving module performs analog-to-digital conversion processing on the amplified analog signal at a preset specific time after the pulse driving module sends the pulse power supply signal, and generates a digital signal after the analog-to-digital conversion processing is completed, wherein the AD converter is not started in the time period between when the pulse driving module sends the pulse power supply signal and the preset specific time after the pulse driving module sends the pulse power supply signal; Step 342: the single-chip microcomputer module in the single-chip microcomputer driving module determines whether there is a dynamic detected object in the preset detection area according to the digital signal. If the single-chip microcomputer module determines that there is a dynamic detected object, a dynamic trigger signal is generated, and the dynamic trigger signal is sent to the external controlled device through the output module. Then, the single-chip microcomputer module enters a dormant state. Step 343: If the single-chip microcomputer module determines that the digital signal is not a static background digital signal, the single-chip microcomputer module enters a dormant state; Step 344: After the single-chip microcomputer module enters the sleep state, the single-chip microcomputer module wakes up again after a specific wake-up time.

8. The method for controlling micro-power consumption of a discontinuous Doppler signal according to claim 7, characterized in that: The time interval for the Doppler microwave module to receive adjacent pulse power supply signals is the pulse power supply interval length, and the duration of the pulse power supply signal is the power supply time length; the pulse power supply interval length is much longer than the power supply time length.

9. The method for controlling micro-power consumption of a discontinuous Doppler signal according to claim 8, characterized in that: In step S342: if the single chip microcomputer module determines that it is yes, the following steps are specifically performed: Step S3421: If the change amplitude of the digital signal is less than or equal to the first preset amplitude, then the judgment is no; Step S3422: If the change amplitude of the digital signal is greater than the first preset amplitude, it is judged as yes.

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