Multi-channel distributed anti-jamming microwave inductor

Abstract

This invention provides a multi-channel distributed anti-interference microwave sensor, wherein the detection channel is formed by the center frequency of the operating frequency of the multi-channel distributed anti-interference microwave sensor and has a certain bandwidth. Under the condition of meeting the uniformity of the process steps of mass production, the mass-produced microwave sensors based on discrete multi-frequency anti-interference have different detection channels or can be set to have different detection channels in the same ISM band according to the division of multiple center frequencies that are spaced apart from each other, thus presenting a multi-channel distribution state. In the actual use of the multi-channel distributed anti-interference microwave sensor, co-frequency interference between the multi-channel distributed anti-interference microwave sensors in multi-microwave sensor application scenarios is avoided, thereby ensuring the working stability of the multi-channel distributed anti-interference microwave sensor in multi-microwave sensor application scenarios.

Description

Technical Field

[0001] This invention relates to the field of microwave detection, and in particular to a multi-channel distributed anti-interference microwave sensor. Background Technology

[0002] With the development of IoT technology, artificial intelligence, smart home, and smart security technologies have increasingly widespread demands for environmental detection, especially for detecting the presence, movement, and micro-motion characteristics of people. Among these, microwave detection technology based on the Doppler effect principle has unique advantages in behavior detection and presence detection technology as an important hub connecting people and objects, and objects with each other. It can detect moving objects, such as human motion characteristics, movement characteristics, and micro-motion characteristics, and even human heartbeat and breathing characteristics, without infringing on human privacy, and therefore has broad application prospects. Specifically, a corresponding microwave sensor is fed by an excitation signal to emit a microwave beam at a frequency corresponding to the excitation signal to a target space, thereby forming a detection area in the target space and receiving a reflected echo formed by the microwave beam being reflected by a corresponding object in the detection area. A Doppler intermediate frequency signal corresponding to the frequency / phase difference between the microwave beam and the reflected echo is output through a mixing and detection method. Based on the Doppler effect principle, when the object reflecting the microwave beam is in motion, the echo signal has a certain frequency / phase difference with the excitation signal, and the Doppler intermediate frequency signal exhibits corresponding amplitude fluctuations to reflect the activity of objects such as human bodies and vehicles.

[0003] The ISM (Industrial, Scientific, Medical) Band is a frequency band defined by the ITU-R (ITU Radiocommunication Sector) and open to unlicensed use by organizations such as industry, science, and medicine. Among these ITU-R-opened bands, the main bands used for microwave detection are 2.4 GHz, 5.8 GHz, and 24.125 GHz. Correspondingly, microwave sensors using these bands must adhere to certain transmission power limits (generally below 1W) to reduce interference with other wireless devices. While the definition and licensing of different frequency bands can regulate the use of radio frequencies and reduce the probability of mutual interference between wireless devices in different bands, the problem of mutual interference between adjacent or identical frequency bands is becoming increasingly serious as the coverage of radio usage in adjacent or identical frequency bands increases, given the limited frequency band resources. For example, in the 5.8 GHz band, in addition to microwave sensors, 5G Wi-Fi, drones, highway ETC (Electronic Toll Collection) systems, and home projection devices may all operate in this band. Unlike other radio communication devices that use modulation to carry communication information by varying the frequency / amplitude of electromagnetic waves and thus actively avoid interference from electromagnetic waves in the same frequency band, microwave sensors based on the Doppler effect inevitably experience electromagnetic radiation interference from the same frequency band as the reflected echo when outputting the Doppler intermediate frequency signal through frequency mixing detection.

[0004] Specifically, in practical applications of microwave sensors, to achieve intelligent control of various devices or more intelligent services, there are often scenarios where multiple microwave sensors are installed adjacently. Taking hotels as an example, multiple microwave sensors are installed simultaneously in the same guest room, corridor, or even the same location to detect different areas and / or actions, thereby achieving intelligent control of corresponding equipment. However, in the mass production of microwave sensors, due to the contribution of standardized process steps to production efficiency and cost reduction, microwave sensors of the same model produced by the same manufacturer operate at the same frequency. Therefore, with the increasing coverage of radio usage in the same frequency band, the problem of co-channel interference faced by microwave sensors in practical use is becoming increasingly prominent, especially the problem of mutual interference between multiple microwave sensors. To solve the problem of co-channel interference in the practical use of microwave sensors, including the problem of mutual interference between multiple microwave sensors, we have first proposed a technical solution based on the change in detection results before and after frequency hopping to determine the accuracy of the detection results. However, in applications with multiple microwave sensors, the operating frequencies of different microwave sensors after frequency hopping cannot be managed uniformly. The frequency hopping action of any microwave sensor may trigger a butterfly effect-like frequency hopping wave, resulting in continuous co-channel interference. Summary of the Invention

[0005] One objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the detection channels of the multi-channel distributed anti-interference microwave sensor are formed by the center frequency point of the operating frequency of the multi-channel distributed anti-interference microwave sensor and have a certain bandwidth. Under the condition of satisfying the uniformity of the process steps in mass production, the mass-produced multi-channel distributed anti-interference microwave sensors have, or can be set to have, different detection channels within the same ISM band according to the division of multiple mutually spaced center frequencies. This helps to avoid mutual interference between the multi-channel distributed anti-interference microwave sensors in multi-microwave sensor application scenarios in actual use, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensor in multi-microwave sensor application scenarios.

[0006] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the mass-produced multi-channel distributed anti-interference microwave sensor has, or can be configured to have, different detection channels within the same frequency band. This reduces the probability of multiple multi-channel distributed anti-interference microwave sensors simultaneously interfering with radio communication equipment in the same frequency band in the environment during actual use, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensor in actual use.

[0007] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the mass-produced multi-channel distributed anti-interference microwave sensor has, or can be configured to have, different detection channels within the same frequency band. This avoids mutual interference between the multi-channel distributed anti-interference microwave sensors during batch testing, such as aging tests and RS tests, thereby reducing the isolation requirements between the multi-channel distributed anti-interference microwave sensors, correspondingly reducing the site and equipment requirements for batch testing, and thus improving batch testing efficiency and reducing batch testing costs.

[0008] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein, while ensuring the uniformity of the process steps in mass production, the mass-produced multi-channel distributed anti-interference microwave sensor has, or can be set to have, different detection channels in the same frequency band, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensor in actual use while maintaining the efficiency of mass production.

[0009] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the minimum center frequency interval of the multi-channel distributed anti-interference microwave sensors with different detection channels in the same frequency band is greater than or equal to 0.01MHz and less than or equal to 100MHz. This ensures the number of detection channels for mass-produced multi-channel distributed anti-interference microwave sensors while also ensuring the bandwidth of each detection channel's tolerance to frequency variations caused by the Doppler effect. Correspondingly, this is beneficial for meeting the high quantity requirements of microwave sensors in multi-microwave sensor application scenarios while ensuring the isolation between the detection channels in multi-microwave sensor application scenarios based on the bandwidth of each detection channel's tolerance to frequency variations caused by the Doppler effect, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensor in multi-microwave sensor application scenarios.

[0010] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the multi-channel distributed anti-interference microwave sensor includes an antenna unit, a voltage-controlled oscillator unit, a mixer-detector unit, a controllable varactor array, and a digital logic unit with registers, wherein the controllable varactor array is electrically connected to the voltage-controlled oscillator unit such that the center frequency of the output frequency of the voltage-controlled oscillator unit is correlated with the capacitance parameter of the controllable varactor array, wherein the antenna unit is fed to the voltage-controlled oscillator unit to transmit a corresponding microwave beam and receive the microwave beam reflected by a corresponding object when fed by the voltage-controlled oscillator unit. The reflected echo is generated by a mixing and detection unit electrically connected to the voltage-controlled oscillator unit and the antenna unit to output a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the microwave beam and the reflected echo via mixing and detection. The digital logic unit is configured to control the capacitance parameters of the controllable varactor array based on the register values ​​of its registers, so that the center frequency of the output frequency of the voltage-controlled oscillator unit can be set based on the corresponding register values ​​of the registers. This allows the mass-produced multi-channel distributed anti-interference microwave sensor to have or be set to have different detection channels according to fixed or adjustable configurations of different register values.

[0011] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the controllable varactor array includes a plurality of controllable plug-in capacitor units, wherein each of the controllable plug-in capacitor units is configured as a switchable capacitive load, wherein in the state where the controllable varactor array is electrically connected to the voltage-controlled oscillator unit, each of the controllable plug-in capacitor units is electrically connected between the voltage-controlled oscillator unit and ground, such that the center frequency of the output frequency of the voltage-controlled oscillator unit is associated with the capacitance parameter of the controllable varactor array, and allows the capacitance parameter of the controllable varactor array to change based on the switching state change of the corresponding controllable plug-in capacitor unit, wherein the digital logic unit is configured to control the switching state of the corresponding controllable plug-in capacitor unit based on the register value of its register to control the capacitance parameter of the controllable varactor array.

[0012] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein, in a state where the controllable varactor array is electrically connected to the voltage-controlled oscillator (VCO), each of the controllable plug-in capacitor units is electrically connected between the VCO and ground. This ensures that the center frequency of the VCO's output frequency is correlated with the capacitance parameters of the controllable varactor array, so that controlling the switching state of the corresponding controllable plug-in capacitor unit does not affect the parameters of the VCO's resonant circuit. This guarantees the accuracy of the correlation between the capacitance parameters of the controllable varactor array and the center frequency of the VCO's output frequency while ensuring the operational stability of the VCO. Furthermore, this allows the detection channels of the mass-produced multi-channel distributed anti-interference microwave sensor to be precisely set according to different register values, thus facilitating stable isolation between the detection channels.

[0013] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein each of the controllable insertion capacitor units has a field-effect transistor, wherein in the state where the controllable varactor array is electrically connected to the voltage-controlled oscillator unit, the drain of the field-effect transistor is electrically connected to the voltage-controlled oscillator unit, and the source of the field-effect transistor is grounded, so that the capacitance parameter of the controllable varactor array is changed based on the on / off state change of the corresponding field-effect transistor, wherein the digital logic unit is configured to control the on / off state of the field-effect transistor of the corresponding controllable insertion capacitor unit to control the capacitance parameter of the controllable varactor array based on the register value of its register.

[0014] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein, in a state where the controllable varactor array is electrically connected to the voltage-controlled oscillator (VCO), the drain of the field-effect transistor (FET) is electrically connected to the VCO, and the source of the FET is grounded. This ensures that controlling the on / off state of the corresponding FET does not affect the parameters of the resonant circuit of the VCO, thereby guaranteeing the accuracy of the correlation between the capacitance parameters of the controllable varactor array and the center frequency of the output frequency of the VCO while ensuring the operational stability of the VCO. Consequently, the detection channels of the mass-produced multi-channel distributed anti-interference microwave sensor can be precisely set according to the configuration of different register values, which is beneficial to ensuring stable isolation between the detection channels.

[0015] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the configurable register value combination of the digital logic unit is set to satisfy a state where the minimum center frequency interval is greater than or equal to 0.01MHz and less than or equal to 100MHz, forming a division of multiple mutually spaced center frequency points within the same ISM band, so that the mass-produced multi-channel distributed anti-interference microwave sensor can have or be set to have different detection channels within the same ISM band according to the fixed configuration or adjustable configuration of different register values ​​in the configurable register value combination.

[0016] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the fixed or adjustable configuration of different register values ​​in the configurable register value combination of the digital logic unit's registers can be implemented based on a unified configuration procedure. That is, the fixed or adjustable configuration of different register values ​​in the configurable register value combination of the digital logic unit's registers can maintain the uniformity of the process steps in mass production, thus helping to ensure the mass production efficiency of the multi-channel distributed anti-interference microwave sensor.

[0017] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number and is referred to as a detection channel number, and an index table is used as the detection channel index table, which associates the detection channel number with the corresponding register value in the combination of configurable register values. The multi-channel distributed anti-interference microwave sensor further includes an MCU that is communicatively connected to the digital logic unit. The MCU has a configuration program and the detection channel number is programmed into it. The configuration program configures the detection channel index table, and reads the detection channel number when the MCU is powered on, and configures the register value in the register of the digital logic unit according to the register value corresponding to the detection channel number indexed by the configuration program. This allows the mass-produced multi-channel distributed anti-interference microwave sensor to have different detection channels by rolling the programming of the detection channel number according to the programming process of the MCU.

[0018] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the programmer of the MCU is configured with a corresponding rolling code rule, and the MCU with different detection channel numbers can realize the rolling code programming of the corresponding detection channel number based on a unified programming process step, thereby maintaining the uniformity of the process steps of the mass-produced multi-channel distributed anti-interference microwave sensor, which is beneficial to ensuring the mass production efficiency of the multi-channel distributed anti-interference microwave sensor.

[0019] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number and is referred to as a detection channel number, and an index table is used as the detection channel index table, which associates the detection channel number with the corresponding register value in the combination of configurable register values. The digital logic unit is configured with corresponding register values ​​based on the programming process steps. The configuration program at the programmer end of the digital logic unit is configured with the rolling code rule for the detection channel number and the detection channel index table. In the programming process steps of the digital logic unit, the programmer end of the digital logic unit selects the corresponding detection channel number based on the rolling code rule and programs the register value corresponding to the detection channel number into the register of the digital logic unit according to the index table. This allows the mass-produced multi-channel distributed anti-interference microwave sensor to have different detection channels depending on the different register values ​​configured in the programming process steps of the digital logic unit.

[0020] Another objective of this invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein the configuration program at the programmer end of the digital logic unit is configured with the rolling code rules of the detection channel number and the state of the detection channel index table. The digital logic unit can realize the programming configuration of different register values ​​in the configurable register value combination based on a unified programming process, thereby maintaining the uniformity of the process steps for mass production of the multi-channel distributed anti-interference microwave sensor, which is beneficial to ensuring the mass production efficiency of the multi-channel distributed anti-interference microwave sensor.

[0021] Another object of the present invention is to provide a multi-channel distributed anti-interference microwave sensor, wherein each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number and is referred to as a detection channel number, and an index table is used as the detection channel index table, which associates the detection channel number with the corresponding register value in the combination of configurable register values. The multi-channel distributed anti-interference microwave sensor further includes an MCU communicatively connected to the digital logic unit and a peripheral input unit communicatively connected to the MCU. The MCU has a configuration program configured with the detection channel index table. The MCU is configured to retrieve the corresponding detection channel number based on the signal input from the peripheral input unit, and configure the register value corresponding to the detection channel number in the register of the digital logic unit according to the index table. This allows the multi-channel distributed anti-interference microwave sensor to have different detection channels depending on the different register values ​​configured for the signal input from the peripheral input unit.

[0022] According to one aspect of the present invention, a multi-channel distributed anti-interference microwave sensor is provided, the multi-channel distributed anti-interference microwave sensor comprising:

[0023] One line unit;

[0024] A voltage-controlled oscillator unit, wherein the antenna unit is fed and connected to the voltage-controlled oscillator unit to transmit a corresponding microwave beam and receive the reflected echo formed by the microwave beam being reflected by a corresponding object when the antenna unit is fed by the voltage-controlled oscillator unit.

[0025] A mixing and detection unit, wherein the mixing and detection unit is electrically connected to the voltage-controlled oscillator unit and the antenna unit, so as to output a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the microwave beam and the reflected echo through mixing and detection;

[0026] A controllable varactor array, wherein the controllable varactor array is electrically connected to the voltage-controlled oscillator unit, wherein the center frequency of the output frequency of the voltage-controlled oscillator unit is related to the capacitance parameter of the controllable varactor array; and

[0027] A digital logic unit with registers, wherein the digital logic unit is configured to control the capacitance parameters of the controllable varactor array based on the register values ​​of its registers, so that the center frequency of the output frequency of the voltage-controlled oscillator unit can be set based on the corresponding register values ​​of the registers, thereby enabling the multi-channel distributed anti-interference microwave sensor to have different detection channels and thus be in a multi-channel distributed state based on the configuration of different register values.

[0028] In one embodiment, the controllable varactor array includes a plurality of controllable plug-in capacitor units, each of which is configured as a switchable capacitive load. In a state where the controllable varactor array is electrically connected to the voltage-controlled oscillator (VCO), each of the controllable plug-in capacitor units is electrically connected between one end of the resonant circuit of the VCO and one end of the power supply terminal, such that the center frequency of the output frequency of the VCO is correlated with the capacitance parameter of the controllable varactor array, and allows for changes in the capacitance parameter of the controllable varactor array based on changes in the switching state of the corresponding controllable plug-in capacitor unit. The digital logic unit is configured to control the capacitance parameter of the controllable varactor array by controlling the switching state of the corresponding controllable plug-in capacitor unit based on the register values ​​of its registers.

[0029] In one embodiment, each of the controllable insertion capacitor units has a field-effect transistor (FET), wherein, in the state where the controllable varactor array is electrically connected to the voltage-controlled oscillator (VCO), the FET is electrically connected at both ends, with its drain and source terminals connected, between the resonant circuit of the VCO and one end of the power supply terminal, thereby causing a change in the capacitance parameter of the controllable varactor array based on the on / off state changes of the corresponding FETs, wherein the digital logic unit is configured to control the on / off state of the FETs of the corresponding controllable insertion capacitor units based on the register values ​​of its registers to control the capacitance parameter of the controllable varactor array.

[0030] In one embodiment, each of the controllable insertion capacitor units further includes a capacitor, wherein the field-effect transistor is electrically connected to one end of the resonant circuit or power supply terminal of the voltage-controlled oscillator unit via the capacitor, so as to set the capacitance parameter change of the controllable insertion capacitor unit based on the on / off state change of its field-effect transistor based on the parameter setting of the capacitor.

[0031] In one embodiment, each of the controllable insertion capacitor units further includes an inductor connected in series with the capacitor, so as to reduce the influence of the capacitance characteristics of the field-effect transistor on the capacitance parameters of the corresponding controllable insertion capacitor unit based on the setting of the inductor.

[0032] In one embodiment, the voltage-controlled oscillator unit includes two N-channel MOSFETs, two P-channel MOSFETs, an oscillation inductor, and an oscillation capacitor. The sources of the two N-channel MOSFETs are electrically connected, the sources of the two P-channel MOSFETs are electrically connected, and the drains of the two N-channel MOSFETs are electrically connected to the drains of different P-channel MOSFETs. This forms a configuration where the drain of one N-channel MOSFET is electrically connected to the drain of one P-channel MOSFET, the source of the P-channel MOSFET is electrically connected to the source of the other P-channel MOSFET, and the drain of the other P-channel MOSFET is electrically connected to the drain of the other N-channel MOSFET. The source of the OS transistor is electrically connected to the source of the aforementioned N-channel MOS transistor in a sequential connection relationship. Among the two N-channel MOS transistors, the gate of one N-channel MOS transistor is electrically connected to the drain of the other N-channel MOS transistor. Among the two P-channel MOS transistors, the gate of one P-channel MOS transistor is electrically connected to the drain of the other P-channel MOS transistor. The two ends of the oscillation inductor are respectively electrically connected to the drains of different P-channel MOS transistors. The two ends of the oscillation capacitor are respectively electrically connected to the drains of different P-channel MOS transistors and are connected in parallel with the oscillation inductor. The oscillation capacitor and the oscillation inductor connected in parallel constitute the resonant circuit of the voltage-controlled oscillator unit.

[0033] In one embodiment, the configurable register value combination of the digital logic unit's registers is set to satisfy a minimum center frequency interval greater than or equal to 0.01MHz and less than or equal to 100MHz, forming a division of multiple mutually spaced center frequency points within the same ISM band. Corresponding to the configuration of different register values ​​in the configurable register value combination, the minimum center frequency interval of the multi-channel distributed anti-interference microwave sensor with different detection channels within the same ISM band is greater than or equal to 0.01MHz and less than or equal to 100MHz.

[0034] In one embodiment, each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number, referred to as the detection channel number, and an index table is used to associate the detection channel number with the corresponding register value in the combination of configurable register values. The multi-channel distributed anti-interference microwave sensor further includes an MCU communicatively connected to the digital logic unit. The MCU has a configuration program and the detection channel number is programmed into it. The configuration program configures the detection channel index table, and when the MCU is powered on, it reads the detection channel number and configures the register value corresponding to the detection channel number in the register of the digital logic unit according to the register value indexed by the configuration program. This allows the mass-produced multi-channel distributed anti-interference microwave sensor to have different detection channels by programming different detection channel numbers according to the programming process of the MCU.

[0035] In one embodiment, the MCU is programmed based on the following programming process steps:

[0036] A1. Configure the configuration program and the rolling code rules for the detection channel number on the programmer end; and

[0037] A2. The configuration program and the detection channel number are programmed into the MCU, wherein, based on the rolling code rule of the detection channel number configured on the programmer, when the configuration program and the detection channel number are programmed into the next MCU on the programmer, the detection channel number programmed into the MCU changes.

[0038] In one embodiment, each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number, referred to as the detection channel number, and an index table is used to associate the detection channel number with the corresponding register value in the configurable register value combination. The multi-channel distributed anti-interference microwave sensor further includes an MCU communicatively connected to the digital logic unit and a peripheral input unit communicatively connected to the MCU. The MCU has a configuration program configured with the detection channel index table. The MCU is configured to retrieve the corresponding detection channel number based on the signal input by the peripheral input unit and configure the register value corresponding to the detection channel number in the register of the digital logic unit according to the index table. This allows the multi-channel distributed anti-interference microwave sensor to be configured with different register values ​​according to the signal input by the peripheral input unit, thus enabling it to have different detection channels.

[0039] In one embodiment, the peripheral input unit is configured as one of a mechanical peripheral input unit, a digital peripheral input unit, and an analog peripheral input unit.

[0040] In one embodiment, the voltage-controlled oscillator unit, the controllable variable capacitance array, and the digital logic unit are integrated into a microwave chip, and the MCU is communicatively connected to the digital logic unit of the microwave chip when it is externally mounted on the microwave chip.

[0041] In one embodiment, the voltage-controlled oscillator unit, the mixer-detector unit, the controllable variable capacitance array, and the digital logic unit are integrated into a microwave chip, and the MCU is communicatively connected to the digital logic unit of the microwave chip when it is externally mounted on the microwave chip.

[0042] In one embodiment, the voltage-controlled oscillator unit, the controllable varactor array, the digital logic unit, and the MCU are integrated into a single microwave chip.

[0043] In one embodiment, the voltage-controlled oscillator unit, the mixer-detector unit, the controllable varactor array, the digital logic unit, and the MCU are integrated into a single microwave chip.

[0044] In one embodiment, the digital logic unit is programmably configured such that the mass-produced multi-channel distributed anti-interference microwave sensor can have different detection channels by programming different register values ​​according to the programming process steps of the digital logic unit.

[0045] In one embodiment, each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number, referred to as the detection channel number, and an index table is used to associate the detection channel number with the corresponding register value in the configurable register value combination, wherein the digital logic unit is programmed based on the following programming process steps:

[0046] B1. Configure the rolling code rules for the detected channel numbers on the programmer end, and configure the detected channel index table in the configuration program on the programmer end, wherein the configuration program is the programmer end's working program; and

[0047] B2. The programmer of the digital logic unit selects the corresponding detection channel number based on the rolling code rule, and records the register value corresponding to the detection channel number into the register of the digital logic unit according to the detection channel index table. The register value recorded into the register changes when the programmer records the register value into the register of the next digital logic unit, based on the rolling code rule of the detection channel number configured on the programmer.

[0048] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0049] Figure 1 A schematic diagram of the structure of a multi-channel distributed anti-interference microwave sensor according to an embodiment of the present invention.

[0050] Figure 2 This is a partial circuit diagram of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention.

[0051] Figure 3A This is a schematic diagram of a circuit structure of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention, based on the circuit principle described above.

[0052] Figure 3B This is a schematic diagram of another circuit structure of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention, based on the circuit principle described above.

[0053] Figure 3C This is a schematic diagram of another circuit structure of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention, based on the circuit principle described above.

[0054] Figure 4 This is a schematic structural block diagram of an integrated form of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention.

[0055] Figure 5 This is a schematic diagram of another integrated form of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention.

[0056] Figure 6 This is a schematic diagram of another integrated form of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention.

[0057] Figure 7This is a schematic diagram of another integrated form of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention.

[0058] Figure 8 This is a schematic block diagram of the structure of the multi-channel distributed anti-interference microwave sensor according to another embodiment of the present invention.

[0059] Figure 9 This is a schematic block diagram of the structure of the multi-channel distributed anti-interference microwave sensor according to another embodiment of the present invention. Detailed Implementation

[0060] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0061] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0062] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0063] This invention provides a multi-channel distributed anti-interference microwave sensor. The sensor uses a channel with a certain bandwidth formed by the center frequency of its operating frequency as the detection channel. While maintaining the uniformity of the mass production process, the mass-produced multi-channel distributed anti-interference microwave sensors, within the same ISM band, are divided according to multiple mutually spaced center frequencies, and thus have, or can be configured to have, different detection channels, exhibiting a multi-channel distribution. This helps avoid mutual interference between the various multi-channel distributed anti-interference microwave sensors in multi-microwave sensor application scenarios, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensor in such scenarios.

[0064] Example, referring to the accompanying drawings of the specification of the present invention. Figure 1 As shown, a structural block diagram of a multi-channel distributed anti-interference microwave sensor according to an embodiment of the present invention is illustrated. The multi-channel distributed anti-interference microwave sensor includes an antenna unit 10, a voltage-controlled oscillator unit 20, a mixer-detector unit 30, a controllable varactor array 40, and a digital logic unit 50 with registers. The controllable varactor array 40 is electrically connected to the voltage-controlled oscillator unit 20. The center frequency of the output frequency of the voltage-controlled oscillator unit 20 is associated with the capacitance parameter of the controllable varactor array 40. The antenna unit 10 is fed to the voltage-controlled oscillator unit 20 to transmit a corresponding microwave beam and receive the microwave beam in a state fed by the voltage-controlled oscillator unit 20. The reflected echo formed by the reflection of an object, wherein the mixing and detection unit 30 is electrically connected to the voltage-controlled oscillator unit 20 and the antenna unit 10, so as to output a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the microwave beam and the reflected echo through mixing and detection, wherein the digital logic unit 50 is configured to control the capacitance parameters of the controllable varactor array 40 based on the register value of its register, so that the center frequency of the output frequency of the voltage-controlled oscillator unit 20 can be set based on the corresponding register value of the register, thereby enabling the multi-channel distributed anti-interference microwave sensor to have or be set to have different detection channels and be in a multi-channel distributed state based on a fixed configuration or adjustable configuration of different register values.

[0065] Specifically, refer to the accompanying drawings of the specification of this invention. Figure 2As shown, a portion of the circuit principle of the multi-channel distributed anti-interference microwave sensor according to the above embodiment of the present invention is illustrated. The controllable varactor array 40 includes a plurality of controllable plug-in capacitor units 41, each of which is configured as a switchable capacitive load. When the controllable varactor array 40 is electrically connected to the voltage-controlled oscillator unit 20, each of the controllable plug-in capacitor units 41 is electrically connected between the resonant circuit of the voltage-controlled oscillator unit 20 and one end of the power supply terminal, such that the center frequency of the output frequency of the voltage-controlled oscillator unit 20 is associated with the capacitance parameter of the controllable varactor array 40, and allows for changes in the capacitance parameter of the controllable varactor array 40 based on the switching state changes of the corresponding controllable plug-in capacitor unit 41. The digital logic unit 50 is configured to control the switching state of the corresponding controllable plug-in capacitor unit 41 based on the register value of its register, thereby controlling the capacitance parameter of the controllable varactor array 40.

[0066] It is worth mentioning that, when the controllable varactor array 40 is electrically connected to the voltage-controlled oscillator unit 20, each controllable insertion capacitor unit 41 is electrically connected between the resonant circuit of the voltage-controlled oscillator unit 20 and one end of the power supply terminal. This ensures that the center frequency of the output frequency of the voltage-controlled oscillator unit 20 is correlated with the capacitance parameters of the controllable varactor array 40. This prevents the switching state control of the corresponding controllable insertion capacitor unit 41 from affecting the resonant circuit parameters of the voltage-controlled oscillator unit 20. Thus, while ensuring the operational stability of the voltage-controlled oscillator unit 20, the accuracy of the correlation between the capacitance parameters of the controllable varactor array 40 and the center frequency of the output frequency of the voltage-controlled oscillator unit 20 is guaranteed. Furthermore, this allows the detection channels of the mass-produced multi-channel distributed anti-interference microwave sensor to be precisely set according to different register values, which is beneficial for ensuring stable isolation between the detection channels.

[0067] Furthermore, refer to the accompanying drawings of the specification of this invention. Figures 3A to 3C As shown, different circuit structures of the multi-channel distributed anti-interference microwave sensor according to the above embodiments of the present invention are illustrated based on the above circuit principle.

[0068] Specifically, in the circuit structures of the multi-channel distributed anti-interference microwave sensor of the above embodiments of the present invention based on the above circuit principle, each of the controllable insertion capacitor units 41 has a field-effect transistor 411. In the state where the controllable varactor array 40 is electrically connected to the voltage-controlled oscillator unit 20, the field-effect transistor 411 is electrically connected at both ends, with its drain and source as connection terminals, between the resonant circuit of the voltage-controlled oscillator unit 20 and one end of the power supply terminal. The drain of the field-effect transistor 411 is electrically connected to the voltage-controlled oscillator unit 20, and the source of the field-effect transistor 411 is grounded. Thus, the capacitance parameter change of the controllable varactor array 40 is formed based on the on / off state change of the corresponding field-effect transistor 411. The digital logic unit 50 is configured to control the on / off state of the field-effect transistor 411 of the corresponding controllable insertion capacitor unit 41 based on the register value of its register to control the capacitance parameter of the controllable varactor array 40.

[0069] For example, corresponding to the circuit connection state where the two ends of the field-effect transistor 411, with the drain and source terminals connected, are electrically connected between the resonant circuit and the power supply terminal of the voltage-controlled oscillator unit 20, in Figures 3A to 3C In this embodiment, the field-effect transistor 411 is electrically connected to the resonant circuit and the negative power supply terminal of the voltage-controlled oscillator unit 20 with its drain and source terminals as connection points. Optionally, in other embodiments of the present invention, corresponding to the circuit connection state where the field-effect transistor 411 is electrically connected to one end of the resonant circuit and the power supply terminal of the voltage-controlled oscillator unit 20 with its drain and source terminals as connection points, the field-effect transistor 411 is electrically connected to the resonant circuit and the positive power supply terminal of the voltage-controlled oscillator unit 20 with its drain and source terminals as connection points.

[0070] It is also worth mentioning that, when the controllable varactor array 40 is electrically connected to the voltage-controlled oscillator unit 20, the two ends of the field-effect transistor 411, with their drain and source terminals connected, are electrically connected between the resonant circuit of the voltage-controlled oscillator unit 20 and one end of the power supply terminal. This ensures that controlling the on / off state of the corresponding field-effect transistor 411 does not affect the parameters of the resonant circuit of the voltage-controlled oscillator unit 20. This ensures the accuracy of the correlation between the capacitance parameters of the controllable varactor array 40 and the center frequency of the output frequency of the voltage-controlled oscillator unit 20 while maintaining the operational stability of the voltage-controlled oscillator unit 20. Consequently, the detection channels of the mass-produced multi-channel distributed anti-interference microwave sensor can be precisely set according to the configuration of different register values, which is beneficial to ensuring stable isolation between the detection channels.

[0071] Furthermore, corresponding to Figure 3B Each of the controllable insertion capacitor units 41 further includes a capacitor 412, wherein the field-effect transistor 411 is electrically connected to one end of the resonant circuit or power supply terminal of the voltage-controlled oscillator unit 20 via the capacitor 412, so as to set the capacitance parameter change of the controllable insertion capacitor unit 41 based on the on / off state change of its field-effect transistor 411, which is beneficial to ensuring the adjustment range of the center frequency point of the output frequency of the voltage-controlled oscillator unit 20 based on the parameter setting of the capacitor 412.

[0072] Specifically, corresponding to Figure 3C ,exist Figure 3B Based on the circuit structure shown, each controllable insertion capacitor unit 41 further includes an inductor 413 connected in series with the capacitor 412. The inductor 413 reduces the influence of the capacitance characteristics of the field-effect transistor 411 on the capacitance parameters of the corresponding controllable insertion capacitor unit 41, thereby ensuring the correlation between the capacitance parameters of the controllable insertion capacitor unit 41 and the parameters of the capacitor 412. This facilitates precise setting of the capacitance parameter change of the controllable insertion capacitor unit 41 based on the on / off state changes of its field-effect transistor 411, thus simplifying circuit parameter design.

[0073] Furthermore, the controllable insertion capacitor units 41 of the controllable varactor array 40 are not limited to being the same. In the different circuit structures of the multi-channel distributed anti-interference microwave sensor of the above embodiments of the present invention based on the above circuit principle, the controllable insertion capacitor units 41 with different circuit structures can be combined with each other to form the controllable varactor array 40. The present invention does not limit this.

[0074] Specifically, in the circuit principle diagram and different circuit structure diagrams based on the above-described circuit principle of the multi-channel distributed anti-interference microwave sensor of the present invention, one circuit structure of the voltage-controlled oscillator unit 20 is also exemplified. The voltage-controlled oscillator unit 20 has two N-channel MOS transistors (corresponding to Q1 and Q2 in the figure), two P-channel MOS transistors (corresponding to Q3 and Q4 in the figure), an oscillation inductor (corresponding to L in the figure), and an oscillation capacitor (corresponding to C in the figure). The sources of the two N-channel MOS transistors are electrically connected, the sources of the two P-channel MOS transistors are electrically connected, and the drains of the two N-channel MOS transistors are electrically connected to different... The drain of the P-channel MOS is configured such that the drain of one of the N-channel MOS transistors is electrically connected to the drain of one of the P-channel MOS transistors, the source of the P-channel MOS transistor is electrically connected to the source of the other P-channel MOS transistor, the drain of the other P-channel MOS transistor is electrically connected to the drain of the other N-channel MOS transistor, and the source of the other N-channel MOS transistor is electrically connected to the source of the first N-channel MOS transistor. In the two N-channel MOS transistors, the gate of any one N-channel MOS transistor is electrically connected to the drain of the other N-channel MOS transistor. In the two P-channel MOS transistors, the gate of any one N-channel MOS transistor is electrically connected to the drain of the other N-channel MOS transistor. The gate of the P-channel MOSFET is electrically connected to the drain of another P-channel MOSFET. The two ends of the oscillating inductor are respectively electrically connected to the drains of different P-channel MOSFETs. The two ends of the oscillating capacitor are respectively electrically connected to the drains of different P-channel MOSFETs and are connected in parallel with the oscillating inductor. The parallel-connected oscillating capacitor and oscillating inductor form the resonant circuit of the voltage-controlled oscillator unit 20. Each controllable insertion capacitor unit 41 is electrically connected between the resonant circuit of the voltage-controlled oscillator unit 20 and one end of the power supply terminal, so that controlling the switching state of the corresponding controllable insertion capacitor unit 41 does not affect the voltage control. The resonant circuit parameters of the voltage-controlled oscillator unit 20 are determined so that, without directly participating in the operation of the resonant circuit of the voltage-controlled oscillator unit 20, the center frequency of the output frequency of the voltage-controlled oscillator unit 20 is correlated with the capacitance parameters of the controllable varactor array 40. This helps to ensure the accuracy of the correlation between the capacitance parameters of the controllable varactor array 40 and the center frequency of the output frequency of the voltage-controlled oscillator unit 20 while ensuring the operational stability of the voltage-controlled oscillator unit 20. Consequently, the detection channels of the mass-produced multi-channel distributed anti-interference microwave sensor can be precisely set according to the configuration of different register values, which helps to ensure stable isolation between the detection channels.

[0075] It is worth mentioning that in the above-described circuit principle diagram and the different circuit structure diagrams based on the above-described circuit principle of the multi-channel distributed anti-interference microwave sensor of the present invention, the circuit structure of the voltage-controlled oscillator unit 20 is only an example and does not limit the present invention. The circuit structure of the voltage-controlled oscillator unit 20 is diverse, and different circuit structures can have the same or different resonant circuits. The present invention does not limit this.

[0076] It is understandable that for a single quantity of the multi-channel distributed anti-interference microwave sensors, each multi-channel distributed anti-interference microwave sensor in product form operates on a single detection channel based on a fixed or adjustable configuration of the corresponding register values ​​in a configurable register value combination. However, the aforementioned structural relationship between the voltage-controlled oscillator unit 20, the controllable variable capacitance array 40, and the digital logic unit 50 with registers ensures the uniformity of the mass production process steps, giving the mass-produced multi-channel distributed anti-interference microwave sensors a structural basis for having, or being set to have, different detection channels. In other words, based on the aforementioned structural relationship of the multi-channel distributed anti-interference microwave sensors, the mass-produced multi-channel distributed anti-interference microwave sensors can have, or be set to have, different detection channels while maintaining the uniformity of the mass production process steps. This ensures the efficiency of mass production of the multi-channel distributed anti-interference microwave sensors and guarantees their operational stability in actual use.

[0077] Preferably, the configurable register value combination of the digital logic unit 50 is set to satisfy the condition that the minimum center frequency interval is greater than or equal to 0.01MHz and less than or equal to 100MHz, forming a division of multiple mutually spaced center frequency points within the same ISM band, so that the mass-produced multi-channel distributed anti-interference microwave sensor can have or be set to have different detection channels in the same ISM band according to the fixed configuration or adjustable configuration of different register values ​​in the configurable register value combination.

[0078] Furthermore, the configurable register value combinations of the digital logic unit 50 are set to satisfy a minimum center frequency interval greater than or equal to 0.01MHz and less than or equal to 100MHz, forming a division of multiple mutually spaced center frequency points within the same ISM band. That is, based on the configuration of different register values ​​in the configurable register value combinations, the minimum center frequency interval of the multi-channel distributed anti-interference microwave sensors with different detection channels within the same ISM band is greater than or equal to 0.01MHz and less than or equal to 100MHz. This ensures the number of detection channels for mass-produced multi-channel distributed anti-interference microwave sensors while also ensuring the bandwidth of each detection channel's tolerance to frequency variations caused by the Doppler effect. This is beneficial for meeting the high quantity requirements of microwave sensors in multi-microwave sensor applications while ensuring isolation between detection channels based on the bandwidth of each detection channel's tolerance to frequency variations caused by the Doppler effect, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensor in multi-microwave sensor application scenarios.

[0079] It is worth mentioning that the mass-produced multi-channel distributed anti-interference microwave sensors have, or can be configured to have, different detection channels within the same frequency band, and the number of detection channels and the isolation between each detection channel can be guaranteed based on the combination of register values. On the one hand, this helps reduce the probability of multiple multi-channel distributed anti-interference microwave sensors simultaneously interfering with radio communication equipment in the same frequency band in the environment, and avoids mutual interference between the multi-channel distributed anti-interference microwave sensors in multi-microwave sensor application scenarios, thereby ensuring the operational stability of the multi-channel distributed anti-interference microwave sensors in actual use (including multi-microwave sensor application scenarios and single-microwave sensor application scenarios). On the other hand, in the batch testing of the multi-channel distributed anti-interference microwave sensors, such as aging tests and RS tests, mutual interference between the multi-channel distributed anti-interference microwave sensors can be avoided, thereby reducing the isolation requirements between the multi-channel distributed anti-interference microwave sensors, correspondingly reducing the site and equipment requirements for batch testing, and thus improving batch testing efficiency and reducing batch testing costs.

[0080] For example, in a batch of products, such as 30 products, each of the multi-channel distributed anti-interference microwave sensors has a different detection channel, which can significantly reduce the probability of co-channel interference in batch testing scenarios or multi-microwave sensor application scenarios. Even if co-channel interference occurs in batch testing or multi-microwave sensor application scenarios, for two products with the same detection channel, the problem can be solved simply by replacing one with a product with a different detection channel, or by swapping the installation positions of the multi-channel distributed anti-interference microwave sensors. Furthermore, when the product code of the corresponding product contains information corresponding to the detection channel of that product, it is possible to quickly replace products with the corresponding detection channel based on the product code, which is therefore very convenient.

[0081] It is understood that in this embodiment of the present invention, the antenna element 10 can be either an independent antenna module integrating transmission and reception, or a combination of antenna modules with separate transmitting and receiving antennas; the present invention does not limit this. Furthermore, the type of antenna used in the antenna element 10 does not constitute a limitation on the present invention.

[0082] Continue to refer to the accompanying drawings of the present invention. Figure 1 As shown, in this embodiment of the present invention, each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number, referred to as the detection channel number, and an index table is used to associate the detection channel number with the corresponding register value in the combination of configurable register values. The multi-channel distributed anti-interference microwave sensor further includes an MCU 60 communicatively connected to the digital logic unit 50. The MCU 60 has a configuration program and the detection channel number is programmed into it. The configuration program configures the detection channel index table, and reads the detection channel number when the MCU 60 is powered on, and configures the register value corresponding to the detection channel number in the register of the digital logic unit 50 according to the register value corresponding to the detection channel number indexed by the configuration program. This allows the mass-produced multi-channel distributed anti-interference microwave sensor to have different detection channels by rolling the programming of the detection channel number according to the programming process of the MCU 60.

[0083] For example, the programming process of the MCU60 includes the following steps:

[0084] A1. Configure the configuration program and the rolling code rules for the detection channel number on the programmer end; and

[0085] A2. The configuration program and the detection channel number are programmed into the MCU60, wherein, based on the rolling code rule of the detection channel number configured on the programmer, when the configuration program and the detection channel number are programmed into the next MCU60 on the programmer, the detection channel number programmed into the MCU60 changes.

[0086] In other words, with the corresponding rolling code rules configured on the programmer end of the MCU60, the MCU60 with different detection channel numbers can achieve rolling code programming of the corresponding detection channel number based on a unified programming process. Therefore, it can maintain the uniformity of the process steps for mass production of the multi-channel distributed anti-interference microwave sensor, which is conducive to ensuring the mass production efficiency of the multi-channel distributed anti-interference microwave sensor.

[0087] It is worth noting that the process of rolling the detection channel number to enable mass-produced multi-channel distributed anti-interference microwave sensors to have different detection channels is merely an example. Based on the above-described structural relationship of the multi-channel distributed anti-interference microwave sensor, mass-produced multi-channel distributed anti-interference microwave sensors can have, or be configured to have, different detection channels through various standardized mass production processes. For example, in some embodiments of the present invention, on a multi-programmer production line, batch programming of MCUs 60 with different detection channel numbers can be achieved by configuring different detection channel numbers on different programmers. The present invention does not limit this.

[0088] Further reference is made to the accompanying drawings of this invention. Figures 4 to 7 As shown, in Figure 1 Based on the structure of the multi-channel distributed anti-interference microwave sensor shown, the multi-channel distributed anti-interference microwave sensor is exemplified separately based on different integration forms.

[0089] Corresponding to Figure 4 As shown, the voltage-controlled oscillator unit 20, the controllable variable capacity array 40, and the digital logic unit 50 are integrated into a microwave chip. The MCU 60 is externally connected to the digital logic unit 50 of the microwave chip.

[0090] Corresponding to Figure 5 The voltage-controlled oscillator unit 20, the mixer detector unit 30, the controllable variable capacitance array 40, and the digital logic unit 50 are integrated into a microwave chip. The MCU 60 is externally connected to the digital logic unit 50 of the microwave chip.

[0091] Corresponding to Figure 6 The voltage-controlled oscillator unit 20, the controllable variable capacity array 40, the digital logic unit 50, and the MCU 60 are integrated into a single microwave chip.

[0092] Corresponding to Figure 7 The voltage-controlled oscillator unit 20, the mixer-detector unit 30, the controllable variable capacitance array 40, the digital logic unit 50, and the MCU 60 are integrated into a single microwave chip.

[0093] Further reference is made to the accompanying drawings of this invention. Figure 8 As shown, based on the structure of the above embodiments of the present invention, specifically in... Figure 4 Based on the illustrated structure of the multi-channel distributed anti-interference microwave sensor, the multi-channel distributed anti-interference microwave sensor may optionally further include a peripheral input unit 70 communicatively connected to the MCU 60. Similarly, the MCU 60 has a configuration program that configures the detection channel index table. Specifically, the MCU 60 is configured to retrieve the corresponding detection channel number based on the signal input from the peripheral input unit 70, and configure the register value corresponding to the detection channel number in the detection channel index table into a register of the digital logic unit 50, thereby enabling the multi-channel distributed anti-interference microwave sensor to be configured with different detection channels based on the different register values ​​configured for the signal input from the peripheral input unit 70.

[0094] It is worth mentioning that, in this embodiment of the present invention, the peripheral input unit 70 can be a mechanical peripheral input unit, such as a DIP switch, a rotary encoder switch (BCD encoder switch), a multi-position switch, a toggle switch, etc.; it can also be a digital peripheral input unit, such as an Internet terminal, a wireless RF receiving module, such as an infrared remote control receiving module, a 433MHz, 868MHz, 2.4GHz WiFi, Bluetooth, and Zigbee receiving module; or it can be an analog peripheral input unit, such as an adjustable potentiometer. The present invention does not limit this. The specific form and communication method of the communication control terminal matching the digital peripheral input unit also do not constitute a limitation of the present invention. For example, the corresponding communication control terminal can be a remote control matching the digital peripheral input unit, or it can be a mobile phone. The communication method using a mobile phone as the communication control terminal can be a short-range communication method based on the corresponding application terminal using the mobile phone's Bluetooth, WiFi, or NFC, or a remote communication method based on the corresponding application terminal using the mobile phone's WiFi or mobile signal. The present invention does not limit this either.

[0095] Specifically, in this embodiment of the present invention, the mass-produced multi-channel distributed anti-interference microwave sensor can be configured to have different detection channels when the peripheral input unit 70 is in the same initial state, corresponding to the rolling code burning of the detection channel number according to the MCU 60 burning process steps in the aforementioned embodiment. Alternatively, it can be configured to have the same initial detection channel when the peripheral input unit 70 is in the same initial state, but can still be configured to have different detection channels based on the settings of the peripheral input unit 70 and the different register values ​​configured according to the signals input by the peripheral input unit 70.

[0096] Further reference is made to the accompanying drawings of this invention. Figure 9 As shown, when the digital logic unit 50 is programmably configured, the multi-channel distributed anti-interference microwave sensor can optionally correspond to... Figure 9 It is not equipped with an external MCU or an integrated MCU with the digital logic unit 50. Instead, it configures corresponding register values ​​for the digital logic unit 50 based on the programming process steps. This enables the mass-produced multi-channel distributed anti-interference microwave sensor to have different detection channels by rolling the programming of the register values ​​according to the programming process steps of the digital logic unit 50.

[0097] For example, the programming process of the digital logic unit 50 includes the following steps:

[0098] B1. Configure the rolling code rules for the detected channel numbers on the programmer end, and configure the detected channel index table in the configuration program on the programmer end, wherein the configuration program is the programmer end's working program; and

[0099] B2. The programmer of the digital logic unit 50 selects the corresponding detection channel number based on the rolling code rule, and records the register value corresponding to the detection channel number into the register of the digital logic unit 50 according to the detection channel index table. The register value recorded into the register changes when the programmer records the register value into the register of the next digital logic unit 50, based on the rolling code rule of the detection channel number configured on the programmer.

[0100] In other words, the rolling code rule of the detection channel number is configured at the programmer end of the digital logic unit 50, and the detection channel index table is configured in the configuration program state at the programmer end. The digital logic unit 50 with different register values ​​can realize the rolling code of the corresponding register values ​​based on a unified programming process. Therefore, it can maintain the uniformity of the process steps of the mass-produced multi-channel distributed anti-interference microwave sensor, which is conducive to ensuring the mass production efficiency of the multi-channel distributed anti-interference microwave sensor.

[0101] It is also worth mentioning that the process steps of rolling code programming register values ​​to enable mass-produced multi-channel distributed anti-interference microwave sensors to have different detection channels are merely examples. Based on the above-described structural relationship of the multi-channel distributed anti-interference microwave sensors, mass-produced multi-channel distributed anti-interference microwave sensors can have, or be configured to have, different detection channels through various uniform mass production process steps. For example, in some embodiments of the present invention, on a multi-programmer production line, batch programming of digital logic units 50 with different register values ​​can also be achieved by configuring different register values ​​at different programmers. The present invention is not limited in this respect.

[0102] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0103] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the embodiments of the present invention may be made without departing from the stated principles.

Claims

1. A multi-channel distributed anti-jamming microwave inductive sensor, characterized in that, include: One line unit; A voltage-controlled oscillator unit, wherein the antenna unit is fed to the voltage-controlled oscillator unit to transmit a corresponding microwave beam and receive the reflected echo formed by the microwave beam being reflected by a corresponding object when the antenna unit is fed to the voltage-controlled oscillator unit. A mixing and detection unit, wherein the mixing and detection unit is electrically connected to the voltage-controlled oscillator unit and the antenna unit, so as to output a Doppler intermediate frequency signal corresponding to the frequency / phase difference between the microwave beam and the reflected echo through mixing and detection; A controllable varactor array, wherein the controllable varactor array is electrically connected to the voltage-controlled oscillator unit, wherein the center frequency of the output frequency of the voltage-controlled oscillator unit is related to the capacitance parameter of the controllable varactor array; and A digital logic unit with registers, wherein the digital logic unit is configured to control the capacitance parameters of the controllable varactor array based on the register values ​​of its registers, so that the center frequency of the output frequency of the voltage-controlled oscillator unit can be set based on the corresponding register values ​​of the registers, thereby enabling the multi-channel distributed anti-interference microwave sensor to have different detection channels and thus be in a multi-channel distributed state based on the configuration of different register values.

2. The multi-channel distributed anti-interference microwave sensor according to claim 1, wherein the controllable varactor array comprises a plurality of controllable plug-in capacitor units, wherein each of the controllable plug-in capacitor units is configured as a switchable capacitive load, wherein in the state where the controllable varactor array is electrically connected to the voltage-controlled oscillator unit, each of the controllable plug-in capacitor units is electrically connected between one end of the resonant circuit of the voltage-controlled oscillator unit and the power supply terminal, such that the center frequency of the output frequency of the voltage-controlled oscillator unit is associated with the capacitance parameter of the controllable varactor array, and allows the capacitance parameter change of the controllable varactor array to be formed based on the switching state change of the corresponding controllable plug-in capacitor unit, wherein the digital logic unit is configured to control the switching state of the corresponding controllable plug-in capacitor unit based on the register value of its register to control the capacitance parameter of the controllable varactor array.

3. The multi-channel distributed anti-interference microwave sensor according to claim 2, wherein each of the controllable insertion capacitor units has a field-effect transistor, wherein in the state where the controllable varactor array is electrically connected to the voltage-controlled oscillator unit, the field-effect transistor is electrically connected at both ends of the voltage-controlled oscillator unit with its drain and source terminals connected, such that the capacitance parameter change of the controllable varactor array is formed based on the on / off state change of the corresponding field-effect transistor, wherein the digital logic unit is configured to control the on / off state of the field-effect transistor of the corresponding controllable insertion capacitor unit to control the capacitance parameter of the controllable varactor array based on the register value of its register.

4. The multi-channel distributed anti-interference microwave sensor according to claim 3, wherein each of the controllable insertion capacitor units further includes a capacitor, wherein the field-effect transistor is electrically connected to one end of the resonant circuit or power supply terminal of the voltage-controlled oscillator unit via the capacitor, so as to set the capacitance parameter change of the controllable insertion capacitor unit based on the on / off state change of its field-effect transistor based on the parameter setting of the capacitor.

5. The multi-channel distributed anti-interference microwave sensor according to claim 4, each of the controllable insertion capacitor units further includes an inductor connected in series with the capacitor, so as to reduce the influence of the capacitance characteristics of the field-effect transistor on the capacitance parameters of the corresponding controllable insertion capacitor unit based on the setting of the inductor.

6. The multi-channel distributed anti-interference microwave sensor according to any one of claims 2 to 5, wherein the voltage-controlled oscillator unit comprises two N-channel MOS transistors, two P-channel MOS transistors, an oscillation inductor, and an oscillation capacitor, wherein the sources of the two N-channel MOS transistors are electrically connected, the sources of the two P-channel MOS transistors are electrically connected, and the drains of the two N-channel MOS transistors are respectively electrically connected to the drains of different P-channel MOS transistors, such that the drain of one N-channel MOS transistor is electrically connected to the drain of one P-channel MOS transistor, the source of the P-channel MOS transistor is electrically connected to the source of the other P-channel MOS transistor, and the drain of the other P-channel MOS transistor is electrically connected to the drain of the other N-channel MOS transistor. The voltage-controlled oscillator (VCO) is configured with the following sequential connection: the gate of one of the N-channel MOSFETs is electrically connected to the drain of the other N-channel MOSFET; the gate of one of the P-channel MOSFETs is electrically connected to the drain of the other P-channel MOSFET; the two ends of the oscillation inductor are electrically connected to the drains of different P-channel MOSFETs; and the two ends of the oscillation capacitor are electrically connected to the drains of different P-channel MOSFETs and connected in parallel with the oscillation inductor. The parallel oscillation capacitor and the oscillation inductor constitute the resonant circuit of the voltage-controlled oscillator unit.

7. The multi-channel distributed anti-interference microwave sensor according to any one of claims 1 to 5, wherein the configurable register value combination of the digital logic unit is set to satisfy a minimum center frequency interval greater than or equal to 0.01MHz and less than or equal to 100MHz, forming a division of multiple mutually spaced center frequency points within the same ISM band, and corresponding to the configuration of different register values ​​in the configurable register value combination, the minimum center frequency interval of the multi-channel distributed anti-interference microwave sensor with different detection channels within the same ISM band is greater than or equal to 0.01MHz and less than or equal to 100MHz.

8. The multi-channel distributed anti-interference microwave sensor according to claim 7, wherein each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number and is referred to as a detection channel number, and an index table is used as the detection channel index table, which associates the detection channel number with the corresponding register value in the combination of configurable register values. The multi-channel distributed anti-interference microwave sensor further includes an MCU communicatively connected to the digital logic unit, wherein the MCU has a configuration program and the detection channel number is programmed into it. The configuration program configures the detection channel index table, corresponding to the MCU reading the detection channel number when powered on, and configuring the register value in the register of the digital logic unit according to the register value corresponding to the detection channel number indexed by the configuration program. This enables the mass-produced multi-channel distributed anti-interference microwave sensor to have different detection channels by programming different detection channel numbers according to the programming process steps of the MCU.

9. The multi-channel distributed anti-interference microwave sensor according to claim 8, wherein the MCU is programmed based on the following programming process steps: A1. Configure the configuration program and the rolling code rules for the detection channel number on the programmer end; and A2. The configuration program and the detection channel number are programmed into the MCU, wherein, based on the rolling code rule of the detection channel number configured on the programmer, when the configuration program and the detection channel number are programmed into the next MCU on the programmer, the detection channel number programmed into the MCU changes.

10. The multi-channel distributed anti-interference microwave sensor according to claim 8, wherein the voltage-controlled oscillator unit, the controllable variable capacitance array and the digital logic unit are integrated into a microwave chip, and the MCU is communicatively connected to the digital logic unit of the microwave chip when it is externally mounted on the microwave chip.

11. The multi-channel distributed anti-interference microwave sensor according to claim 8, wherein the voltage-controlled oscillator unit, the mixer detector unit, the controllable variable capacitance array and the digital logic unit are integrated into a microwave chip, and the MCU is communicatively connected to the digital logic unit of the microwave chip when it is externally mounted on the microwave chip.

12. The multi-channel distributed anti-interference microwave sensor according to claim 8, wherein the voltage-controlled oscillator unit, the controllable variable capacitance array, the digital logic unit and the MCU are integrated into a single microwave chip.

13. The multi-channel distributed anti-interference microwave sensor according to claim 8, wherein the voltage-controlled oscillator unit, the mixer detector unit, the controllable variable capacitance array, the digital logic unit and the MCU are integrated into a single microwave chip.

14. The multi-channel distributed anti-interference microwave sensor according to claim 7, wherein each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number and is referred to as a detection channel number, and an index table is used as the detection channel index table, which associates the detection channel number with the corresponding register value in the combination of configurable register values. The multi-channel distributed anti-interference microwave sensor further includes an MCU communicatively connected to the digital logic unit and a peripheral input unit communicatively connected to the MCU. The MCU has a configuration program configured with the detection channel index table. The MCU is configured to retrieve the corresponding detection channel number based on a signal input from the peripheral input unit, and to configure the register value corresponding to the detection channel number in the register of the digital logic unit according to the index of the detection channel index table. This allows the multi-channel distributed anti-interference microwave sensor to be configured with different register values ​​based on the signal input from the peripheral input unit, thus enabling it to have different detection channels.

15. The multi-channel distributed anti-interference microwave sensor according to claim 14, wherein the peripheral input unit is configured as one of a mechanical peripheral input unit, a digital peripheral input unit, and an analog peripheral input unit.

16. The multi-channel distributed anti-interference microwave sensor according to claim 14, wherein the voltage-controlled oscillator unit, the controllable variable capacitance array and the digital logic unit are integrated into a microwave chip, and the MCU is communicatively connected to the digital logic unit of the microwave chip when it is externally mounted on the microwave chip.

17. The multi-channel distributed anti-interference microwave sensor according to claim 14, wherein the voltage-controlled oscillator unit, the mixer-detector unit, the controllable variable capacitance array and the digital logic unit are integrated into a microwave chip, and the MCU is communicatively connected to the digital logic unit of the microwave chip when it is externally mounted on the microwave chip.

18. The multi-channel distributed anti-interference microwave sensor according to claim 14, wherein the voltage-controlled oscillator unit, the controllable variable capacitance array, the digital logic unit and the MCU are integrated into a single microwave chip.

19. The multi-channel distributed anti-interference microwave sensor according to claim 14, wherein the voltage-controlled oscillator unit, the mixer detector unit, the controllable variable capacitance array, the digital logic unit and the MCU are integrated into a single microwave chip.

20. The multi-channel distributed anti-interference microwave sensor according to claim 7, wherein the digital logic unit is programmably configured such that the mass-produced multi-channel distributed anti-interference microwave sensor can have different detection channels by programming different register values ​​according to the programming process steps of the digital logic unit.

21. The multi-channel distributed anti-interference microwave sensor according to claim 20, wherein each detection channel of the multi-channel distributed anti-interference microwave sensor has a corresponding number and is referred to as the detection channel number, and an index table is used as the detection channel index table, which associates the detection channel number with the corresponding register value in the configurable register value combination, wherein the digital logic unit is programmed based on the following programming process steps: B1. Configure the rolling code rules for the detected channel numbers on the programmer end, and configure the detected channel index table in the configuration program on the programmer end, wherein the configuration program is the programmer end's working program; and B2. The programmer of the digital logic unit selects the corresponding detection channel number based on the rolling code rule, and records the register value corresponding to the detection channel number into the register of the digital logic unit according to the detection channel index table. The register value recorded into the register changes when the programmer records the register value into the register of the next digital logic unit, based on the rolling code rule of the detection channel number configured on the programmer.

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