CN114325676B - Low-power-consumption radar system, low-power-consumption radar device and monitoring device - Google Patents
Low-power-consumption radar system, low-power-consumption radar device and monitoring device Download PDFInfo
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Abstract
This application belongs to radar technical field, provides a low-power consumption radar system, low-power consumption radar device and monitoring device, and the low-power consumption radar system includes: the frequency mixing module generates a target frequency mixing signal according to a received target antenna signal and a transmitting oscillation signal generated by the oscillation module, the target frequency mixing signal is amplified by the signal amplification module to generate a frequency mixing amplification signal, the first signal demodulation module demodulates the frequency mixing amplification signal to generate a wake-up signal, the second signal demodulation module demodulates the frequency mixing amplification signal according to the wake-up signal to generate an output signal, and the modulation module generates a modulation signal according to the wake-up signal to be sent to the oscillation module so as to adjust the working mode of the oscillation module.
Description
Technical Field
The application belongs to the technical field of radars, and particularly relates to a low-power-consumption radar system, a low-power-consumption radar device and a monitoring device.
Background
The radar has the advantages of object movement detection, distance detection, speed detection and the like, works through the Doppler characteristic of electromagnetic waves, is not limited by conditions such as temperature and humidity, and can work all the day. However, the radar is an active sensor and needs to emit electromagnetic wave energy to the outside, and the power consumption of the radar always restricts the application of the radar, especially restricts the application in battery-powered equipment.
In a complex application scene, external interference can be effectively eliminated and a target can be accurately identified only through a relatively complex demodulation algorithm, the complex demodulation algorithm also brings higher power consumption, and the laser radar, the infrared detector and the like used in reality are often interfered by weather, temperature, light and the like. The radar has the advantages of all weather, the power consumption of the radar needs to be effectively reduced, and the radar can bring wider application market by combining the advantages of good all weather working characteristics.
Disclosure of Invention
In order to solve the technical problem, an embodiment of the present application provides a low power consumption radar system, a low power consumption radar apparatus and a monitoring apparatus, which can solve the problem of large power consumption of the existing radar system, support the use of battery power supply, and have stronger complex environment adaptability.
A first aspect of an embodiment of the present application provides a low power radar system, including:
the device comprises an oscillation module and a control module, wherein the oscillation module comprises a transmitting oscillation signal generator and a power amplifier, the transmitting oscillation signal generator is used for generating a high-frequency transmitting oscillation signal required by radar, and the power amplifier is used for amplifying the amplitude of the high-frequency transmitting oscillation signal and generating a transmitting oscillation signal;
the frequency mixing module is connected with the oscillation module and used for generating a target frequency mixing signal according to the received target antenna signal and the transmitting oscillation signal; the signal amplification module is connected with the frequency mixing module and used for receiving the target frequency mixing signal and amplifying the target frequency mixing signal to generate a frequency mixing amplification signal;
the first signal demodulation module is connected with the signal amplification module and used for receiving the frequency mixing amplification signal and demodulating the frequency mixing amplification signal to generate a wake-up signal;
the second signal demodulation module is connected with the first signal demodulation module and the signal amplification module and used for demodulating the frequency mixing amplification signal according to the wake-up signal and generating an output signal;
and the modulation module is respectively connected with the first signal demodulation module and the oscillation module and is used for generating a modulation signal according to the wake-up signal and sending the modulation signal to the oscillation module so as to adjust the working mode of the oscillation module.
In one embodiment, the modulation module generates a modulation signal and sends the modulation signal to the oscillation module when receiving the wake-up signal, and switches the working mode of the oscillation module from a pulse working mode to a frequency sweep working mode or a frequency hopping working mode;
when the working mode of the oscillation module is a pulse working mode, the oscillation module generates a first transmission oscillation signal, and when the working mode of the oscillation module is a sweep frequency working mode or a frequency hopping working mode, the oscillation module generates a second transmission oscillation signal, wherein the frequency of the second transmission oscillation signal is greater than that of the first transmission oscillation signal.
In an embodiment, the first signal demodulation module is further configured to control an operating mode of the second signal demodulation module, where the second signal demodulation module starts to demodulate the frequency-mixing amplified signal after receiving the wake-up signal, and generates an output signal.
In one embodiment, the second signal demodulation module is further configured to start timing when receiving the wake-up signal, and enter a standby state when the timing time reaches a preset time threshold;
and the modulation module starts timing when receiving the wake-up signal and stops sending the modulation signal when the timing time reaches a preset time threshold value so as to control the working mode of the oscillation module to be switched from a frequency sweeping working mode or a frequency hopping working mode to a pulse working mode.
In one embodiment, the second signal demodulation module includes:
the timing unit is connected with the first signal demodulation module and used for receiving the wake-up signal, starting timing after receiving the wake-up signal and generating a timing time signal;
a time threshold voltage source for providing a preset time threshold signal;
and the signal demodulation unit is respectively connected with the timing unit and the time threshold voltage source and is used for entering a standby state when the timing time signal reaches the preset time threshold signal.
In one embodiment, the signal amplification module is a double-ended input, double-ended output amplification circuit or a single-ended input, single-ended output amplification circuit.
In one embodiment, the low power radar system further comprises:
and the antenna module is respectively connected with the frequency mixing module and the oscillation module and used for generating an antenna transmitting signal according to the transmitting oscillation signal and receiving a target feedback signal.
In one embodiment, the antenna module is a separate antenna for transceiving or a common antenna for transceiving.
A second aspect of embodiments of the present application provides a low power consumption radar apparatus including a low power consumption radar system as defined in any one of the above.
A third aspect of embodiments of the present application provides a monitoring apparatus including a low power radar system as described in any one of the above.
The embodiment of the application provides a low-power consumption radar system, low-power consumption radar device and monitoring device, and the low-power consumption radar system includes: the system comprises an oscillation module, a frequency mixing module, a signal amplification module, a first signal demodulation module, a second signal demodulation module and a modulation module, wherein the frequency mixing module is connected with the oscillation module and used for generating a target frequency mixing signal according to a received target antenna signal and a transmitted oscillation signal generated by the oscillation module and sending the target frequency mixing signal to the signal amplification module, the signal amplification module amplifies the target frequency mixing signal to generate a frequency mixing amplification signal, the first signal demodulation module is connected with the signal amplification module and used for receiving the frequency mixing amplification signal and demodulating the frequency mixing amplification signal to generate a wake-up signal, the second signal demodulation module is connected with the first signal demodulation module and the signal amplification module and used for demodulating the frequency mixing amplification signal according to the wake-up signal to generate an output signal, and the modulation module is respectively connected with the first signal demodulation module and the oscillation module, the method is used for generating a modulation signal according to the wake-up signal and sending the modulation signal to the oscillation module so as to adjust the working mode of the oscillation module, solves the problem of large power consumption of the existing radar system, supports the use of a battery for power supply, and has stronger complex environment adaptability.
Drawings
Fig. 1 is a schematic circuit diagram of a low power consumption radar system according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a low power consumption radar system according to another embodiment of the present application;
fig. 3 is a schematic circuit diagram of a low power consumption radar system according to another embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means one or more unless specifically limited otherwise.
An embodiment of the present application provides a low power consumption radar system, as shown in fig. 1, the low power consumption radar system includes: the signal processing apparatus includes an oscillation module 10, a mixing module 20, a signal amplifying module 30, a first signal demodulating module 40, a second signal demodulating module 50, and a modulating module 60.
Specifically, the oscillation module 10 includes a transmission oscillation signal generator and a power amplifier, wherein the transmission oscillation signal generator is configured to generate a high-frequency transmission oscillation signal required by the radar, the power amplifier is configured to amplify an amplitude of the high-frequency transmission oscillation signal to generate a transmission oscillation signal, the mixing module 20 is connected to the oscillation module 10 and is configured to generate a target mixing signal according to a received target antenna signal and the transmission oscillation signal, the signal amplification module 30 is connected to the mixing module 20 and is configured to receive the target mixing signal and amplify the target mixing signal to generate a mixing amplification signal, the first signal demodulation module 40 is connected to the signal amplification module 30 and is configured to receive the mixing amplification signal and demodulate the mixing amplification signal to generate a wake-up signal, the second signal demodulation module 50 is connected to the first signal demodulation module 40 and the signal amplification module 30, the modulation module 60 is connected to the first signal demodulation module 40 and the oscillation module 10, and is configured to generate a modulation signal according to the wake-up signal and send the modulation signal to the oscillation module 10, so as to adjust the operating mode of the oscillation module 10.
In this embodiment, the oscillation module 10 includes a transmission oscillation signal generator and a power amplifier, wherein the transmission oscillation signal generator is configured to generate a high-frequency transmission oscillation signal required by the radar, the power amplifier is configured to amplify an amplitude of the high-frequency transmission oscillation signal to generate a transmission oscillation signal, wherein the high-frequency transmission oscillation signal required by the radar may be preset, that is, the high-frequency transmission oscillation signal is generated based on a preset frequency, the mixing module 20 generates a target mixing signal according to the received target antenna signal and the transmission oscillation signal, specifically, the oscillation module 10 may generate transmission oscillation signals with different frequencies, the oscillation module 10 sends the transmission oscillation signals with different frequencies to an antenna connected to the oscillation module, the antenna transmits a radar local oscillation signal and also receives a feedback signal of the target object, and after the mixing module 20 receives a reflection signal of the target object fed back by the antenna, the signal generated by the frequency mixing process with the local oscillation signal is called a target frequency mixing signal.
In the embodiment, the signal amplification module 30 amplifies the target mixed signal to generate the mixed amplified signal, because the frequency spectrum of the target mixed signal is very wide, and it is difficult to achieve gain flatness with good uniformity in a very wide frequency band, it is a common practice to filter the received signal and then amplify the signal by the signal amplification module 30. The intermediate frequency amplification module has the functions of amplifying intermediate frequency signals, suppressing noise and interference of adjacent channels and automatically controlling gain, and can effectively solve the problem that the existing radar system is easily interfered by external environment.
In this embodiment, the first signal demodulation module 40 receives the frequency-mixing amplified signal, demodulates the frequency-mixing amplified signal, and generates a wake-up signal, specifically, the first signal demodulation module 40 first shifts the frequency spectrum carrying the target information near the carrier into the baseband, then filters out the baseband signal with a corresponding filter, completes the demodulation task, and generates the wake-up signal, the second signal demodulation module 50 demodulates the frequency-mixing amplified signal according to the wake-up signal, and generates an output signal, for example, the signal demodulation module may directly filter out the frequency spectrum from the pulse modulated wave with a low-pass filter, so as to implement demodulation, modulated signal components in some pulse modulated waves (such as pulse position modulation, pulse code modulation, etc.) are small, and usually they are first changed into pulse amplitude or pulse width modulated signals, and then filters out useful signals with a filter, so as to implement filtering out useful signals, meanwhile, the second signal demodulation module 50 is turned on to perform demodulation processing only after receiving the wake-up signal, and is always in a standby state when the second signal demodulation module 50 does not receive the wake-up signal, so that the problem of high power consumption of the conventional radar system is solved.
In this embodiment, the modulation module 60 generates a modulation signal according to the wake-up signal and sends the modulation signal to the oscillation module 10, so as to adjust the working mode of the oscillation module 10, for example, when the oscillation module 10 does not receive the modulation signal, the frequency of the generated transmitted oscillation signal is small, the working mode is a pulse working mode, when the oscillation module 10 receives the modulation signal, the frequency of the generated transmitted oscillation signal is large, the working mode is a frequency sweep working mode or a frequency hopping working mode, the moving distance and the speed of the target are measured, so as to determine the continuity of the movement of the object, thereby determining the authenticity of the target, and thus improving the working adaptability and the reliability in the complex environment of the radar.
In an embodiment, the modulation module 60 generates a modulation signal and sends the modulation signal to the oscillation module 10 when receiving the wake-up signal, and switches the operation mode of the oscillation module 10 from a pulse operation mode to a frequency sweep operation mode or a frequency hopping operation mode, specifically, when the operation mode of the oscillation module 10 is the pulse operation mode, the oscillation module 10 generates a first transmission oscillation signal, and when the operation mode of the oscillation module 10 is the frequency sweep operation mode or the frequency hopping operation mode, the oscillation module 10 generates a second transmission oscillation signal.
Specifically, when receiving the wake-up signal, the modulation module 60 generates a modulation signal and sends the modulation signal to the oscillation module 10, and the working mode of the oscillation module 10 is switched from the pulse working mode to the sweep working mode or the frequency hopping working mode, in brief, the modulation module 60 does not send the modulation signal to the oscillation module 10 when not receiving the wake-up signal, at this time, the working mode of the oscillation module 10 is the pulse working mode, the modulation module 60 generates a modulation signal and sends the modulation signal to the oscillation module 10 when receiving the wake-up signal, and the working mode of the oscillation module 10 is switched to the sweep working mode or the frequency hopping working mode, for example, the frequency of the first transmission oscillation signal generated by the oscillation module 10 in the pulse working mode is the first frequency, the antenna scans an article with the first frequency after receiving the first transmission oscillation signal, the frequency of the second transmission oscillation signal generated by the oscillation module 10 in the sweep working mode or the frequency hopping working mode is the second frequency, the antenna scans articles with the second frequency after receiving the second transmission oscillating signal, sets up two kinds of different mode, and on the one hand can be accurate scan the object, and on the other hand can reduce radar system's consumption.
In one embodiment, in the pulse operation mode, the power consumption of the radar system is lower than 100uA, when a moving signal is detected, an antenna transmits a target antenna signal, the mixing module 20 generates a target mixing signal from the received target antenna signal and a transmitted oscillation signal, the signal amplifying module 30 amplifies the target mixing signal to generate a mixing amplified signal, the first signal demodulating module 40 demodulates the mixing amplified signal to generate a wake-up signal, the second signal demodulating module 50 is connected to the first signal demodulating module 40 and the signal amplifying module 30 to demodulate the mixing amplified signal according to the wake-up signal and generate an output signal, the modulating module 60 is connected to the first signal demodulating module 40 and the oscillating module 10 respectively to generate a modulated signal according to the wake-up signal and transmit the modulated signal to the oscillating module 10 to adjust the operation mode of the oscillating module 10, and changing the working mode of the radar system into a frequency sweeping working mode or a frequency hopping working mode, and measuring the moving distance and the moving speed of the target to judge the continuity of the movement of the object so as to judge the authenticity of the target. And after the judgment is finished, the radar system is restored to the pulse working mode again so as to reduce the power consumption of the system.
In one embodiment, the modulation module 60 generates a modulation signal when receiving the wake-up signal, and sends the modulation signal to the oscillation module 10, and switches the working mode of the oscillation module 10 from a pulse working mode to a frequency hopping working mode, specifically, the frequency hopping working mode is a communication mode in which the carrier frequencies of the signals transmitted by the transceiver and the transmitter change according to a predetermined rule, that is, the frequency hopping working mode greatly widens the whole working frequency band, thereby achieving accurate measurement of the target object.
In an embodiment, the first signal demodulation module 40 is further configured to control an operation mode of the second signal demodulation module 50, wherein the second signal demodulation module 50 starts to demodulate the frequency-mixing amplified signal after receiving the wake-up signal and generate an output signal, specifically, the system has both the first signal demodulation module 40 and the second signal demodulation module 50, the first signal demodulation module 40 controls an operation mode of the second signal demodulation module 50, and when the second signal demodulation module 50 receives the wake-up signal, the second signal demodulation module is woken up and starts to operate, and demodulates the frequency-mixing on-off signal and generates an output signal, and conversely, when the second signal demodulation module 50 does not receive the wake-up signal, the second signal demodulation module is in an off state, which may reduce power consumption of the radar system.
In one embodiment, referring to fig. 2, the second signal demodulation module 50 is further configured to start timing when receiving the wake-up signal and enter a standby state when the timing time reaches a preset time threshold, and the modulation module 60 starts timing when receiving the wake-up signal and stops sending the modulation signal when the timing time reaches the preset time threshold, so as to control the operation mode of the oscillation module 10 to be switched from the frequency sweeping operation mode or the frequency hopping operation mode to the pulse operation mode.
Specifically, in this embodiment, the second signal demodulation module 50 starts to enter the standby state after a certain time after receiving the wake-up signal, so as to reduce power consumption, for example, the second signal demodulation module 50 may demodulate the frequency-mixing amplified signal after receiving the wake-up signal, generate an output signal, start timing, and enter the standby state when the timing time reaches a preset time threshold, the second signal demodulation module 50 may start timing when the frequency-mixing amplified signal is changed when the frequency-mixing amplified signal is demodulated, and enter the standby state when the timing time reaches the preset time threshold, the second signal demodulation module 50 may compare the frequency-mixing amplified signal with a preset frequency-mixing amplified signal interval when the frequency-mixing amplified signal is changed when the frequency-mixing amplified signal is demodulated, and determine whether to enter the standby state according to the comparison result, for example, when the mixing-amplifying signal is changed and is not within the preset mixing-amplifying signal interval, the second signal demodulating module 50 enters the standby state, and conversely, when the mixing-amplifying signal is changed and remains within the preset mixing-amplifying signal interval, the second signal demodulating module 50 continues to be in the operating state and does not enter the standby state.
In this embodiment, referring to fig. 2, the modulation module 60 starts timing when receiving the wake-up signal, and stops sending the modulation signal when the timing time reaches a preset time threshold, so as to control the operating mode of the oscillation module 10 to be switched from the frequency sweep operating mode or the frequency hopping operating mode to the pulse operating mode, specifically, when the operating mode of the oscillation module 10 is the frequency sweep operating mode or the frequency hopping operating mode, the second signal demodulation module 50 is in an operating state, demodulates the frequency mixing amplified signal, and generates an output signal, and when the operating mode of the oscillation module 10 is the pulse mode, the second signal demodulation module 50 just reaches the preset time threshold when the timing time starts to receive the wake-up signal, and the second signal demodulation module 50 enters a standby state to reduce power consumption.
In one embodiment, referring to fig. 2, the second signal demodulation module 50 includes: timing unit 51, time threshold voltage source 52 and signal demodulation unit 53.
Specifically, the timing unit 51 is connected to the first signal demodulation module 40, and is configured to receive the wake-up signal, start timing after receiving the wake-up signal, and generate a timing time signal, the time threshold voltage source 52 is configured to provide a preset time threshold signal, and the signal demodulation unit 53 is connected to the timing unit 51 and the time threshold voltage source 52, and is configured to enter a standby state when the timing time signal reaches the preset time threshold signal.
In this embodiment, when the timing unit 51 starts timing after receiving the wake-up signal, the signal demodulation unit 53 is configured to compare the timing time signal with a preset time threshold signal, for example, when the timing time signal is smaller than the preset time threshold signal, the second signal demodulation module 50 continues to be in an operating state, demodulates the mixing amplified signal, and generates an output signal, and when the timing time signal is greater than or equal to the preset time threshold signal, which indicates that the second demodulation module has been operating for a certain time, the second demodulation module enters a standby state, and reduces power consumption.
In one embodiment, the signal amplification block 30 is a double-ended input, double-ended output amplification circuit or a single-ended input, single-ended output amplification circuit.
Specifically, when the signal amplification module 30 is a dual-input and dual-output amplification circuit, the input end of the signal amplification module 30 receives a target mixing signal sent by the output end of the mixing module 20, the first output end of the signal amplification module 30 is connected to the first signal demodulation module 40, the second output end of the signal amplification module 30 is connected to the second signal demodulation module 50, and when the first signal demodulation module 40 generates a wake-up signal and sends the wake-up signal to the second signal demodulation module 50, the second signal demodulation module 50 receives the mixing amplification signal through the second output end to perform demodulation processing, and generates an output signal. When the signal amplifying module 30 is a single-ended input and single-ended output amplifying circuit, the input end of the signal amplifying module 30 receives a target mixing signal sent by the output end of the mixing module 20, the output end of the signal amplifying module 30 is connected to the first signal demodulating module 40 and the second signal demodulating module 50, and when the first signal demodulating module 40 generates a wake-up signal and sends the wake-up signal to the second signal demodulating module 50, the second signal demodulating module 50 receives the mixing amplifying signal to perform demodulation processing, and generates an output signal.
In one embodiment, referring to fig. 3, the low power radar system further includes: an antenna module 70.
Specifically, the antenna module 70 is connected to the frequency mixing module 20 and the oscillation module 10, respectively, and is configured to generate an antenna transmission signal according to the transmission oscillation signal and receive a target feedback signal. For example, the antenna module 70 generates an antenna transmission signal according to the frequency of the transmission oscillation signal sent by the oscillation module 10, the antenna transmission signal returns to generate a target feedback signal, the target feedback signal is sent to the frequency mixing module 20 after being received by the receiving end of the antenna module 70, the target feedback signal fed back after the antenna transmission signal detects a target signal object is also called an antenna target signal, and the antenna target signal and the transmission oscillation signal generate a target frequency mixing signal after being received by the frequency mixing module 20.
In one embodiment, antenna module 70 is a separate antenna for transceiving or a common antenna for transceiving.
Specifically, a signal transmitting end and a signal receiving end of the transceiving split antenna are divided into two parts, wherein the signal transmitting end is connected with the oscillation module 10 and used for generating an antenna transmitting signal according to the transmitted oscillation signal, the signal receiving end is connected with the frequency mixing module 20 and used for transmitting the received target feedback signal to the frequency mixing module 20, and specifically, the new transmitting end enables the antenna transmitting signal to be radiated to the space sufficiently after passing through the signal transmitting end and receives the target feedback signal through the signal receiving end. The signal transmitting end and the signal receiving end of the transceiving shared antenna are a shared port, and are simultaneously connected to the oscillating module 10 and the frequency mixing module 20, on one hand, the signal transmitting end and the signal receiving end are used for generating an antenna transmitting signal according to the transmitting oscillating signal, and on the other hand, the signal transmitting end and the signal receiving end are used for sending the received target feedback signal to the frequency mixing module 20, so that the signal transmitting end and the signal receiving end of the transceiving shared antenna can simultaneously transmit and receive within the antenna bandwidth.
In one embodiment, the low power radar system further comprises a power amplification module.
The embodiment of the application also provides a low-power-consumption radar device which comprises the low-power-consumption radar system.
The embodiment of the application also provides a monitoring device, which comprises the low-power-consumption radar system.
The embodiment of the application provides a low-power consumption radar system, low-power consumption radar device and monitoring device, and the low-power consumption radar system includes: an oscillation module 10, a mixing module 20, a signal amplification module 30, a first signal demodulation module 40, a second signal demodulation module 50 and a modulation module 60, wherein the mixing module 20 is connected to the oscillation module 10, and is configured to generate a target mixing signal according to a received target antenna signal and a transmission oscillation signal generated by the oscillation module 10, and send the target mixing signal to the signal amplification module 30, the signal amplification module 30 amplifies the target mixing signal to generate a mixing amplification signal, the first signal demodulation module 40 is connected to the signal amplification module 30, and is configured to receive the mixing amplification signal and demodulate the mixing amplification signal to generate a wake-up signal, the second signal demodulation module 50 is connected to the first signal demodulation module 40 and the signal amplification module 30, and is configured to demodulate the mixing amplification signal according to the wake-up signal to generate an output signal, the modulation module 60 is respectively connected to the first signal demodulation module 40 and the oscillation module 10, the method is used for generating a modulation signal according to the wake-up signal and sending the modulation signal to the oscillation module 10 so as to adjust the working mode of the oscillation module 10, solve the problem that the existing radar system is high in power consumption, and improve the adaptability of a complex environment.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, in accordance with legislation and patent practice, the computer readable medium does not include electrical carrier signals and telecommunications signals.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (8)
1. A low power radar system, comprising:
the device comprises an oscillation module and a control module, wherein the oscillation module comprises a transmitting oscillation signal generator and a power amplifier, the transmitting oscillation signal generator is used for generating a high-frequency transmitting oscillation signal required by radar, and the power amplifier is used for amplifying the amplitude of the high-frequency transmitting oscillation signal and generating a transmitting oscillation signal;
the frequency mixing module is connected with the oscillation module and used for generating a target frequency mixing signal according to the received target antenna signal and the transmitting oscillation signal;
the signal amplification module is connected with the frequency mixing module and used for receiving the target frequency mixing signal and amplifying the target frequency mixing signal to generate a frequency mixing amplification signal;
the first signal demodulation module is connected with the signal amplification module and used for receiving the frequency mixing amplification signal and demodulating the frequency mixing amplification signal to generate a wake-up signal; the first signal demodulation module firstly moves a frequency spectrum which is positioned near a carrier and carries target information to a baseband, and then filters out a baseband signal by using a filter to complete the demodulation processing;
the second signal demodulation module is connected with the first signal demodulation module and the signal amplification module and used for demodulating the frequency mixing amplification signal according to the wake-up signal and generating an output signal;
the modulation module is respectively connected with the first signal demodulation module and the oscillation module and is used for generating a modulation signal according to the wake-up signal and sending the modulation signal to the oscillation module so as to adjust the working mode of the oscillation module;
the first signal demodulation module is further configured to control a working mode of the second signal demodulation module, and when the second signal demodulation module is awakened according to the awakening signal, the second signal demodulation module demodulates the frequency mixing amplification signal to generate the output signal;
when the modulation module receives the wake-up signal, a modulation signal is generated and sent to the oscillation module, and the working mode of the oscillation module is switched from a pulse working mode to a sweep frequency working mode or a frequency hopping working mode;
when the working mode of the oscillation module is a pulse working mode, the oscillation module generates a first emission oscillation signal, and when the working mode of the oscillation module is a sweep frequency working mode or a frequency hopping working mode, the oscillation module generates a second emission oscillation signal.
2. The low power radar system of claim 1 wherein the second signal demodulation module is further configured to start timing when receiving the wake-up signal and enter a standby state when the timing time reaches a preset time threshold;
and the modulation module starts timing when receiving the wake-up signal and stops sending the modulation signal when the timing time reaches a preset time threshold value so as to control the working mode of the oscillation module to be switched from a frequency sweeping working mode or a frequency hopping working mode to a pulse working mode.
3. The low power radar system of claim 2 wherein the second signal demodulation module comprises:
the timing unit is connected with the first signal demodulation module and used for receiving the wake-up signal, starting timing after receiving the wake-up signal and generating a timing time signal;
a time threshold voltage source for providing a preset time threshold signal;
and the signal demodulation unit is respectively connected with the timing unit and the time threshold voltage source and is used for entering a standby state when the timing time signal reaches the preset time threshold signal.
4. The low power radar system of claim 1 wherein the signal amplification module is a double-ended input, double-ended output amplification circuit or a single-ended input, single-ended output amplification circuit.
5. The low power radar system of claim 1, wherein the low power radar system further comprises:
and the antenna module is respectively connected with the frequency mixing module and the oscillation module and used for generating an antenna transmitting signal according to the transmitting oscillation signal and receiving a target feedback signal.
6. The low power radar system of claim 5 wherein the antenna module is a transmit-receive split antenna or a transmit-receive common antenna.
7. A low power radar apparatus comprising a low power radar system according to any one of claims 1 to 6.
8. A monitoring device, characterized in that it comprises a low power radar system according to any one of claims 1 to 6.
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