Millimeter wave / infrared active and passive imaging detection device and method

Abstract

The present disclosure provides a millimeter wave / infrared active and passive imaging detection device and method, which are applied to the detection of meteorological targets, and include a millimeter wave radar detection module and an infrared detection module. The millimeter wave radar detection module is used to transmit a millimeter wave electromagnetic wave detection signal to the meteorological target, and receive a scattered echo signal generated by the millimeter wave electromagnetic wave detection signal encountering the meteorological target; the infrared detection module is fixed on the transmitting antenna of the millimeter wave radar detection module, and is used to perform infrared detection on the meteorological target and obtain the infrared brightness temperature data of the meteorological target; wherein the millimeter wave electromagnetic wave detection signal is a Ka-band and W-band high-power detection signal, and the infrared detection field of view of the infrared detection module is consistent with the radar detection field of view of the transmitting antenna, so as to realize the coaxial scanning of radar detection and infrared detection, thereby ensuring the consistency of the detection target.

Description

Technical Field

[0001] The present disclosure relates to the field of remote sensing detection technology, and in particular to a millimeter wave / infrared active and passive imaging detection device and method. Background Art

[0002] Millimeter wave bands (such as Ka band and W band) have a higher sensitivity to smaller cloud particles due to their shorter wavelengths, and millimeter waves can penetrate clouds for detection. Therefore, millimeter wave radar is one of the important means of cloud detection. In addition, infrared sensors (9.6-11.5um) can be used to measure the infrared radiation emitted by clouds. The infrared radiation brightness temperature reflects the particle phase state on the cloud surface. Among them, ground-based and satellite-based equipment for detecting clouds based on infrared frequency bands is very extensive, such as infrared sky imagers, satellite-borne infrared cloud image detectors, etc. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In order to solve at least one of the above-mentioned technical problems of millimeter wave / infrared active and passive imaging detectors in the prior art, the present invention provides a millimeter wave / infrared active and passive imaging detection device and method, which can be applied to the detection of meteorological targets, such as detecting clouds and precipitation processes, and obtaining the macroscopic structure and microphysical characteristics of clouds and precipitation.

[0005] (II) Technical solution

[0006] One aspect of the present disclosure provides a millimeter wave / infrared active and passive imaging detection device, which is applied to the detection of meteorological targets, and includes a millimeter wave radar detection module and an infrared detection module. The millimeter wave radar detection module is used to transmit millimeter wave electromagnetic wave detection signals to meteorological targets, and receive scattered echo signals generated by the millimeter wave electromagnetic wave detection signals encountering meteorological targets; the infrared detection module is fixed on the transmitting antenna of the millimeter wave radar detection module, and is used to perform infrared detection on meteorological targets and obtain infrared brightness temperature data of meteorological targets; wherein the millimeter wave electromagnetic wave detection signal is a Ka-band and W-band high-power detection signal, and the infrared detection field of view of the infrared detection module is consistent with the radar detection field of view of the transmitting antenna, so as to realize coaxial scanning of radar detection and infrared detection.

[0007] According to an embodiment of the present disclosure, the millimeter wave radar detection module includes a receiving unit, a transmitting unit and an antenna feed line unit. The receiving unit is used to perform an up-conversion operation on the received positive slope linear frequency modulation signal to generate a radio frequency excitation signal; the transmitting unit is used to amplify the radio frequency excitation signal sent by the receiving unit to generate a high-power millimeter wave electromagnetic wave detection signal; the antenna feed line unit is used to receive the millimeter wave electromagnetic wave detection signal transmitted by the transmitting unit, and transmit the millimeter wave electromagnetic wave detection signal in the form of a dual-polarized continuous wave; wherein the antenna feed line unit is also used to receive the scattered echo signal generated by the meteorological target due to the millimeter wave electromagnetic wave detection signal, and the receiving unit is also used to receive the echo signal received by the antenna feed line unit to generate an intermediate frequency signal corresponding to the echo signal.

[0008] According to an embodiment of the present disclosure, the receiving unit includes a dual-channel receiver front end and a dual-channel receiving channel. The dual-channel receiver front end is used to perform front-end amplification on the echo signal transmitted by the antenna feed line unit to generate an amplified echo signal; the dual-channel receiving channel is used to perform intermediate frequency processing on the amplified echo signal to generate an intermediate frequency signal.

[0009] According to an embodiment of the present disclosure, the receiving unit further includes a frequency source, an excitation unit and a calibration unit. The frequency source is used to generate a source signal required to send a radio frequency excitation signal; the excitation unit is used to perform up-conversion processing on the source signal to obtain a radio frequency excitation signal; the calibration unit is used to perform up-conversion processing on the source signal to obtain a calibration signal, and transmit the calibration signal to the front end of the dual-channel receiver in a calibration mode to perform strength and dual-channel consistency calibration.

[0010] According to an embodiment of the present disclosure, the transmitting unit includes an all-solid-state transmitter and a transmitting monitor. The all-solid-state transmitter is used to amplify the radio frequency excitation signal to generate a millimeter wave electromagnetic wave detection signal; the transmitting monitor is used to generate and output the transmitting power data of the all-solid-state transmitter to monitor the operating status of the all-solid-state transmitter.

[0011] According to an embodiment of the present disclosure, the transmission monitor includes a power meter probe and a monitoring board. The power meter probe is used to perform waveguide coupling processing on the output power signal of the measured all-solid-state transmitter to generate transmission power data; the monitoring board is used to provide working status information of the all-solid-state transmitter.

[0012] According to an embodiment of the present disclosure, the antenna feeder unit includes a receiving antenna, a transmitting antenna and a feeder assembly. The receiving antenna is used to receive an echo signal; the transmitting antenna is used to transmit a millimeter wave electromagnetic wave detection signal generated by the transmitting unit; the feeder assembly is used to forward the millimeter wave electromagnetic wave detection signal to the transmitting antenna, and forward the echo signal to the dual-channel receiving channel front end of the receiving unit.

[0013] According to an embodiment of the present disclosure, a feed line assembly includes a first orthogonal mode coupler, a second orthogonal mode coupler, a transmission loop waveguide, a reception loop waveguide, a waveguide switch, a power divider, and a directional coupler.

[0014] The first orthogonal mode coupler is connected to the transmitting antenna, and is used to receive the millimeter wave electromagnetic wave detection signal of the transmitting unit and forward it to the transmitting antenna; the second orthogonal mode coupler is connected to the receiving antenna, and is used to receive the echo signal of the receiving antenna, and separate two orthogonally polarized signals from the feed output end of the transmitting unit, and ensure the isolation of the two polarized signals before forwarding; the transmitting loop waveguide is connected to the first orthogonal mode coupler, and is used to transmit the millimeter wave electromagnetic wave detection signal; the receiving loop waveguide is connected to the second orthogonal mode coupler, and is used to transmit the echo signal; the waveguide switch is connected to the transmitting loop waveguide, and is used to control the signal transmission switch between the transmitting loop waveguide and the transmitting unit, so as to realize the switching of the radar working mode by electronic control; the power divider is connected to the waveguide switch, and is used to perform power equal distribution processing on the millimeter wave electromagnetic wave detection signal output by the transmitting unit, so as to transmit it to the two interfaces of the waveguide switch respectively. The directional coupler is used to couple the millimeter wave electromagnetic wave detection signal transmitted by the transmitting loop waveguide, so as to realize the monitoring of the transmitting power of the transmitting unit.

[0015] According to an embodiment of the present disclosure, the transmitting antenna includes a transmitting feed horn, which has a coaxial waveguide nested structure, including a circular waveguide, a coaxial waveguide, a dielectric rod, a metal ring and a corrugated horn. The circular waveguide is formed by the inner conductor of the transmitting feed horn being hollowed out, and is used to transmit a W-band high-power detection signal; the coaxial waveguide is used to transmit a Ka-band high-power detection signal; the dielectric rod is loaded at the center of the circular waveguide to control high-frequency radiation characteristics; the metal ring is used to load and improve the matching characteristics of the millimeter-wave electromagnetic wave detection signal in the low-frequency band; and the corrugated horn is used to control the low-frequency radiation characteristics.

[0016] According to an embodiment of the present disclosure, the infrared detection module includes a thermal infrared sensing head, an infrared reflection surface, and a fixed bracket. The thermal infrared sensing head is used to transmit the infrared brightness temperature data of the meteorological target to the data processing unit of the device; the infrared reflection surface is used to refract the meteorological target into the thermal infrared sensor of the thermal infrared sensing head; the fixed bracket is fixedly connected to the thermal infrared sensing head and the infrared reflection surface, and is fixed to the transmitting antenna, so that the infrared detection field of view of the infrared detection module and the radar detection field of view of the transmitting antenna keep the same axis.

[0017] According to an embodiment of the present disclosure, the millimeter wave radar detection module also includes a signal processing unit and a data processing unit. The signal processing unit is used to process the intermediate frequency signal transmitted by the receiving unit to generate signal processing data; the data processing unit is used to process the signal processing data and infrared brightness temperature data transmitted by the signal processing unit to achieve management of meteorological products and control of the millimeter wave radar detection module.

[0018] According to an embodiment of the present disclosure, processing the intermediate frequency signal transmitted by the receiving unit to generate signal processing data includes: digital sampling, de-frequency modulation, windowing, two-dimensional FFT, incoherent spectrum accumulation, ground clutter filtering, and spectrum parameter estimation of the intermediate frequency signal.

[0019] According to an embodiment of the present disclosure, the device further includes a servo module. The servo module is used to receive a control operation instruction to generate a drive signal, and when the drive signal is executed, the antenna feed line unit is controlled to perform scanning detection to generate scanning detection data; wherein the signal processing unit is also used to receive a control operation instruction to generate a positive slope linear frequency modulation signal.

[0020] According to an embodiment of the present disclosure, the signal processing unit includes an intermediate frequency digital receiver and a signal processor. The intermediate frequency digital receiver is used to digitally demodulate the intermediate frequency signal to obtain the difference frequency echo I / Q signal; the signal processor is used to estimate and process the difference frequency echo I / Q signal to output meteorological target information.

[0021] Another aspect of the present disclosure provides a millimeter wave / infrared active and passive imaging detection method, which is applied to the detection of meteorological targets, wherein the above method is implemented based on the above device.

[0022] (III) Beneficial effects

[0023] The present disclosure provides a millimeter wave / infrared active and passive imaging detection device and method, which are applied to the detection of meteorological targets, and include a millimeter wave radar detection module and an infrared detection module. The millimeter wave radar detection module is used to transmit millimeter wave electromagnetic wave detection signals to meteorological targets, and receive scattered echo signals generated by the millimeter wave electromagnetic wave detection signals encountering meteorological targets; the infrared detection module is fixed on the transmitting antenna of the millimeter wave radar detection module, and is used to perform infrared detection on meteorological targets and obtain infrared brightness temperature data of meteorological targets; wherein the millimeter wave electromagnetic wave detection signal is a Ka-band and W-band high-power detection signal, and the infrared detection field of view of the infrared detection module is consistent with the radar detection field of view of the transmitting antenna, so as to realize the coaxial scanning of radar detection and infrared detection, thereby ensuring the consistency of the detection target. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram showing a structural stereogram of a millimeter wave radar detection module and an infrared detection module of a millimeter wave / infrared active and passive imaging detection device according to an embodiment of the present disclosure;

[0025] Figure 2 The specific composition architecture diagram of the millimeter wave / infrared active and passive imaging detection device according to an embodiment of the present disclosure is schematically shown. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0027] It should be noted that the implementation methods not shown or described in the drawings or the text of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of various elements and methods are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0028] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0029] Moreover, the shapes and sizes of the components in the figures do not reflect the real size and proportion, but only illustrate the contents of the embodiments of the present disclosure. In addition, in the claims, any reference symbols between brackets shall not be constructed as limiting the claims.

[0030] Furthermore, the word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

[0031] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., to modify the corresponding elements, do not themselves mean that the elements have any ordinal numbers, nor do they represent the order of one element and another element or the order of manufacturing methods. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0032] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and set in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into multiple submodules or subunits or subcomponents. All features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination, except that at least some of such features and / or processes or units are mutually exclusive. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature that provides the same, equivalent or similar purpose. Furthermore, in a unit claim that lists several devices, several of these devices may be embodied by the same hardware item.

[0033] Similarly, it should be understood that in order to streamline the present disclosure and aid in understanding one or more of the various disclosed aspects, in the above description of the exemplary embodiments of the present disclosure, the various features of the present disclosure are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the following intention: the claimed disclosure requires more features than the features explicitly recited in each claim. More specifically, as reflected in the claims below, the disclosed aspects lie in less than all the features of the single embodiment disclosed above. Therefore, the claims that follow the specific embodiment are hereby expressly incorporated into the specific embodiment, with each claim itself serving as a separate embodiment of the present disclosure.

[0034] The existing millimeter-wave cloud radar and infrared detector are independent devices, which cannot guarantee the consistency of the detection target. In the process of using millimeter-wave cloud radar and infrared imaging to analyze cloud features at the same time, due to the inconsistency in time and space, it is very easy to cause errors in the inverted cloud parameters. In addition, there are few research and development and application cases of dual-wavelength (Ka band and W band) radars in the existing technology. Although more particle information parameters can be obtained by using dual-wavelength signal parameters, the radar lacks a complete calibration function, especially the transmitter power and receiver noise coefficient, which have a greater impact on signal accuracy. The lack of monitoring leads to changes in transmitter power and receiver noise coefficient, which will affect the measurement accuracy of radar reflectivity. In addition, millimeter-wave radar antennas are more prominently affected by rain and snow. For example, when water accumulates on the surface of the antenna cover, the signal transmission loss will be greatly increased, and its increase is proportional to the thickness of the water film, which will bring large errors to the quantitative application of reflectivity in the later stage.

[0035] In order to solve at least one of the above-mentioned technical problems of millimeter wave / infrared active and passive imaging detectors in the prior art, the present invention provides a millimeter wave / infrared active and passive imaging detection device and method, which can be applied to the detection of meteorological targets, such as detecting clouds and precipitation processes, and obtaining the macroscopic structure and microphysical characteristics of clouds and precipitation.

[0036] like Figure 1 and Figure 2 As shown, one aspect of the present disclosure provides a millimeter wave / infrared active and passive imaging detection device, which is applied to the detection of meteorological targets, and includes a millimeter wave radar detection module 100 and an infrared detection module 200. The millimeter wave radar detection module 110 is used to transmit a millimeter wave electromagnetic wave detection signal to the meteorological target, and receive a scattered echo signal generated by the millimeter wave electromagnetic wave detection signal encountering the meteorological target; the infrared detection module 200 is fixed on the transmitting antenna 132 of the millimeter wave radar detection module 110, and is used to perform infrared detection on the meteorological target and obtain the infrared brightness temperature data of the meteorological target; wherein, the millimeter wave electromagnetic wave detection signal is a Ka-band and W-band high-power detection signal, and the infrared detection field of view of the infrared detection module 200 is consistent with the radar detection field of view of the transmitting antenna 132, so as to realize the coaxial scanning of radar detection and infrared detection.

[0037] A millimeter wave / infrared active and passive imaging detector system can be formed by the above-mentioned millimeter wave radar detection module 100 and infrared detection module 200. Among them, the millimeter wave radar detection module 100 can be a dual-frequency millimeter wave (Ka and W band) radar, and the infrared detection module 200 can be an infrared imaging detector.

[0038] like Figure 1 As shown, the transmitting antenna 132 and the receiving antenna 131 of the millimeter-wave radar detection module 100 are fixedly arranged with the infrared detection module 200. Specifically, there is a connecting and fixing structure for mutual connection between the transmitting antenna 132 and the receiving antenna 131, and the fixing bracket 220 of the infrared detection module 200 can be connected below the fixing structure. The infrared detection module 200 is connected to the transmitting antenna 132 of the millimeter-wave radar detection module 100 through the fixing bracket 220, so that when the transmitting antenna 132 performs radar detection, the infrared detection field of view of the infrared detection module 200 and the radar detection field of view of the transmitting antenna 132 keep the same axis, thereby realizing coaxial scanning and ensuring the consistency of the detected target.

[0039] Therefore, the dual-band millimeter-wave radar and infrared imaging system are used to cooperate with each other to jointly detect severe convective processes and high-altitude disturbance processes with non-precipitation clouds and weak precipitation clouds as the main meteorological targets, as well as the macroscopic structural characteristics, microphysical parameters, cloud particle characteristics, ice crystal particle characteristics, vertical airflow and flow field structure of high clouds.

[0040] Furthermore, in the process of using three different frequency bands to cooperate with each other to observe meteorological targets such as precipitation, since the Ka-band radar has a smaller attenuation and a relatively longer wavelength, it is more sensitive to particles in precipitation clouds and has a high detection sensitivity (the W-band radar has a shorter wavelength and is more severely attenuated by precipitation clouds). Therefore, when precipitation occurs, the Ka-band radar is more suitable for observing convection processes. The W-band radar has a shorter wavelength than the Ka-band radar. When the precipitation process moves vertically above the observation area, the W-band radar has a higher observation sensitivity to cloud blankets and high cirrus clouds. That is, based on the above-mentioned coaxial scanning device, joint observation of Ka-band radar and W-band radar can be realized, so that the two complement each other and realize the detection of vertical airflow and phase evolution process of particles in the whole precipitation process; further, when the main body of precipitation cloud moves out of the vertical upper area of ​​radar, the infrared band can observe the infrared brightness temperature data from cloud base to cloud top from the side, among which the infrared brightness temperature data is used to reflect the integrated amount of ice crystal particles in the cloud, giving a macroscopic quantitative result, and the ice water content in high clouds can be inverted through the infrared brightness temperature data.

[0041] In summary, in the process of precipitation weather detection, simultaneous observations of the Ka band, W band and infrared band are achieved. At different development stages of the precipitation process, the complementary advantages of the three bands can jointly complete the continuous observation of the entire severe convection process.

[0042] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the millimeter wave radar detection module 100 includes a receiving unit 110, a transmitting unit 120 and an antenna feed line unit 130. The receiving unit 110 is used to perform an up-conversion operation on the received positive slope linear frequency modulation signal to generate a radio frequency excitation signal; the transmitting unit 120 is used to amplify the radio frequency excitation signal sent by the receiving unit 110 to generate a high-power millimeter wave electromagnetic wave detection signal; the antenna feed line unit 130 is used to receive the millimeter wave electromagnetic wave detection signal transmitted by the transmitting unit 120, and transmit the millimeter wave electromagnetic wave detection signal in the form of a dual-polarization continuous wave transmission; wherein, the antenna feed line unit 130 is also used to receive the scattered echo signal generated by the meteorological target due to the millimeter wave electromagnetic wave detection signal, and the receiving unit 110 is also used to receive the echo signal received by the antenna feed line unit 130 to generate an intermediate frequency signal corresponding to the echo signal.

[0043] like Figure 2As shown, the receiving unit 110 performs an up-conversion operation on the positive slope linear frequency modulation signal sent by the signal processing unit 140 to generate a radio frequency excitation signal that can be processed by the transmitting unit 120. Through the processing of the radio frequency excitation signal by the transmitting unit 120, a high-power millimeter wave electromagnetic wave detection signal can be generated. The antenna feed line unit 130 controls the transmission of the millimeter wave electromagnetic wave detection signal toward the meteorological target and receives the echo signal generated by the detection signal. The receiving unit 110 receives and processes the echo signal, generates an intermediate frequency signal, and transmits it to the signal processing unit 140 for processing.

[0044] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the receiving unit 110 includes a dual-channel receiver front end and a dual-channel receiving channel. The dual-channel receiver front end is used to perform front-end amplification on the echo signal transmitted by the antenna feed line unit 130 to generate an amplified echo signal; the dual-channel receiving channel is used to perform intermediate frequency processing on the amplified echo signal to generate an intermediate frequency signal.

[0045] The receiving unit 110 is composed of a superheterodyne dual-channel receiving channel, a digital intermediate frequency processing, a constant temperature receiving Ka-band receiver and a W-band receiver. The constant temperature receiving Ka-band receiver and the W-band receiver can be used to constitute the receiver of the receiving unit 110, and the receiver includes the above-mentioned dual-channel receiver front end.

[0046] Specifically, the receiver is mainly composed of a clock and frequency source, and a transmitting excitation unit. The dual-channel receiver front end of the receiving unit 110 is mainly used to generate an amplified echo signal by amplifying and frequency conversion of a weak echo signal with high sensitivity, and the dual-channel receiving channel is used to perform intermediate frequency processing on the echo signal to obtain an intermediate frequency signal, and then extract the IQ information of the echo signal through coherent demodulation, and transmit it to the signal processing unit 140 through an optical fiber for data processing; at the same time, the transmitting excitation unit of the receiving unit 110 is used to generate a transmitting excitation signal, and the clock and frequency source are used to generate a synchronous clock signal for the entire machine.

[0047] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the receiving unit 110 further includes a frequency source, an excitation unit and a calibration unit. The frequency source is used to generate a source signal required to send a radio frequency excitation signal; the excitation unit is used to perform up-conversion processing on the source signal to obtain a radio frequency excitation signal; the calibration unit is used to perform up-conversion processing on the source signal to obtain a calibration signal, and transmit the calibration signal to the front end of the dual-channel receiver in a calibration mode to perform strength and consistency calibration of the dual channels.

[0048] The frequency source can be the above-mentioned clock and frequency source, and the above-mentioned synchronous clock signal can be used as the source signal required to send the RF excitation signal. After the excitation unit performs up-conversion processing on the source signal, the corresponding RF excitation signal can be obtained, so that the calibration unit can be in the calibration mode, and the receiving unit 110 generates an intermediate frequency calibration signal (intermediate frequency signal) which is fed into the front end of the dual-channel receiver from the calibration switch after up-conversion. The calibration signal calibrates the system dual-channel consistency, distance, speed, etc., so as to use the solid-state noise source in the machine to control the power on and off of the noise source to realize the noise coefficient test, and use the high-precision power probe to monitor the transmitter power intensity in real time, and send the calibration result to the data processing unit 150.

[0049] In addition, a constant temperature control box is designed to reduce the impact of temperature drift on the receiving unit 110. The constant temperature system adopts two-stage constant temperature measures. The first stage controls the internal temperature of the box body within the range of 40±10℃ through an AA type (Air-to-Air Systems) thermoelectric cooling module. The second stage fixes several modules that need constant temperature on the temperature averaging board, and controls the temperature of the temperature averaging board at 30±1℃ through a DA type (Direct-to-Air Systems) thermoelectric cooling module.

[0050] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the transmitting unit 120 includes an all-solid-state transmitter 121 and a transmitting monitor. The all-solid-state transmitter 121 is used to amplify the radio frequency excitation signal to generate a millimeter wave electromagnetic wave detection signal; the transmitting monitor is used to generate and output the transmitting power data of the all-solid-state transmitter 121 to monitor the operating status of the all-solid-state transmitter 121.

[0051] The transmitting unit 120 is mainly composed of a Ka-band FM continuous wave all-solid-state transmitter, a W-band FM continuous wave all-solid-state transmitter and a transmitting monitor. The Ka-band FM continuous wave all-solid-state transmitter and the W-band FM continuous wave all-solid-state transmitter are used to form the above-mentioned all-solid-state transmitter 121, and the all-solid-state transmitter 121 is composed of three parts: a power amplifier element, a power supply element, and a fan cooling element. The receiving unit 110 generates a linear frequency modulation RF excitation signal of not less than 10dBm and sends it to the power amplifier element of the all-solid-state transmitter 121, which is amplified by the power amplifier element and sent to the antenna feed line unit 130. The power supply element supplies power to the power amplifier element and the fan cooling element.

[0052] like Figure 1 and Figure 2As shown, according to an embodiment of the present disclosure, the transmission monitor includes a power meter probe and a monitoring board. The power meter probe is used to perform waveguide coupling processing on the output power signal of the measured all-solid-state transmitter 121 to generate transmission power data; the monitoring board is used to provide working status information of the all-solid-state transmitter 121.

[0053] The transmitting monitor is composed of a Rohde & Schwarz power meter and a monitoring board, etc. The Rohde & Schwarz power meter is used as the power meter probe. The monitoring board is used to connect to the monitoring module 400, and send and feed back the working status information of the all-solid-state transmitter 121 and the entire transmitting unit 120 to the monitoring module 400, thereby realizing the status monitoring of the transmitting unit 120.

[0054] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the antenna feeder unit 130 includes a receiving antenna 131, a transmitting antenna 132 and a feeder assembly. The receiving antenna 131 is used to receive the echo signal; the transmitting antenna 132 is used to transmit the millimeter wave electromagnetic wave detection signal generated by the transmitting unit 120; the feeder assembly is used to forward the millimeter wave electromagnetic wave detection signal to the transmitting antenna 132, and forward the echo signal to the dual-channel receiving channel front end of the receiving unit 110.

[0055] The antenna feeder unit 130 is mainly composed of a receiving antenna 131, a transmitting antenna 132 and a feeder assembly. The receiving antenna 131 and the transmitting antenna 132 are both Cassegrain structures, including a main reflector, a sub-reflector, and a feed horn. Figure 1 As shown. The feeder assembly includes orthogonal mode couplers, directional couplers, waveguide switches, power dividers, waveguides and other components. The main function of the antenna feeder unit 130 is: when the millimeter wave radar detection signal is transmitted, the high-frequency transmission pulse energy generated by the all-solid-state transmitter 121 of the transmitting unit 120 can be transmitted to the transmitting antenna 132 with as little signal loss as possible, and the transmitting antenna 132 radiates the high-frequency energy directionally into space; when receiving the high-frequency radar echo signal, it is received by the receiving antenna 131 and can be effectively transmitted to the receiver of the receiving unit 110 through the feeder assembly. The receiving antenna 131 and the transmitting antenna 132 have good impedance matching and focusing performance, and the transmission loss of the feeder assembly is small, which has the characteristic of protecting the front-end equipment of the receiver from being burned by high-power radio frequency energy.

[0056] like Figure 1 and Figure 2As shown, according to an embodiment of the present disclosure, the feed line assembly includes a first orthogonal mode coupler 331, a second orthogonal mode coupler 332, a transmitting loop waveguide, a receiving loop waveguide, a waveguide switch 333, a power divider and a directional coupler. The first orthogonal mode coupler 331 is connected to the transmitting antenna 132, and is used to receive the millimeter wave electromagnetic wave detection signal of the transmitting unit 120 and forward it to the transmitting antenna 132; the second orthogonal mode coupler 332 is connected to the receiving antenna 131, and is used to receive the echo signal of the receiving antenna 131, and separate two orthogonally polarized signals from the feed output end of the transmitting unit 120, and ensure the isolation of the two polarized signals before forwarding; the transmitting loop waveguide is connected to the first orthogonal mode coupler 331, and is used to transmit the millimeter wave electromagnetic wave detection signal; the receiving loop waveguide is connected to the second orthogonal mode coupler 332, and is used to transmit the echo signal; the waveguide switch 333 is connected to the transmitting loop waveguide, and is used to control the signal transmission switch between the transmitting loop waveguide and the transmitting unit 120, so as to realize the switching of the radar working mode by electronic control; the power divider is connected to the waveguide switch 333, and is used to perform power equal distribution processing on the millimeter wave electromagnetic wave detection signal output by the transmitting unit 120, so as to transmit it to the two interfaces of the waveguide switch 333 respectively. The directional coupler is used to couple the millimeter wave electromagnetic wave detection signal transmitted by the transmitting loop waveguide to monitor the transmitting power of the transmitting unit 120.

[0057] like Figure 1 As shown, the orthogonal mode coupler is integrated with the dual-frequency feed horn of the receiving antenna 131 and the transmitting antenna 132. The main function of the orthogonal mode coupler is to separate two orthogonally polarized signals from the feed output end, namely, horizontally polarized and vertically polarized RF echoes, and ensure good isolation between the two polarized RF echo signals. At the same time, it is required to be able to withstand the corresponding power and have good standing wave and loss.

[0058] There are mainly two orthogonal mode couplers, namely the first orthogonal mode coupler 331 and the second orthogonal mode coupler 332, which are respectively installed under the transmitting antenna 132 and the receiving antenna 131, so as to ensure that the two orthogonal polarization signals can be separated from the output end of the feed source for transmission / reception, and that there is good isolation between the two polarization signals before forwarding. Among them, the two orthogonal polarization signals are Ka and W bands, that is, horizontal and vertical dual-polarization continuous waves are used for transmission, and the horizontal and vertical polarization components of the echo signal are received. The function of the directional coupler in the transmitting branch is to couple out a small part of the transmitting signal to provide it to the power detection device to realize the monitoring of the transmission power.

[0059] like Figure 1 and Figure 2As shown, according to an embodiment of the present disclosure, the transmitting antenna 132 includes a transmitting feed horn, which has a coaxial waveguide nested structure, including a circular waveguide, a coaxial waveguide, a dielectric rod, a metal ring and a corrugated horn. The circular waveguide is formed by the inner conductor of the transmitting feed horn being hollowed out, and is used to transmit a W-band high-power detection signal; the coaxial waveguide is used to transmit a Ka-band high-power detection signal; the dielectric rod is loaded at the center of the circular waveguide to control high-frequency radiation characteristics; the metal ring is used to load and improve the matching characteristics of the millimeter-wave electromagnetic wave detection signal in the low-frequency band; and the corrugated horn is used to control the low-frequency radiation characteristics.

[0060] The dual-frequency feed horn adopts a coaxial waveguide nested structure. The inner conductor is opened to form a circular waveguide to transmit W-band signals, while the coaxial waveguide transmits Ka-band signals. The central circular waveguide is loaded with a dielectric rod, and metal ring loading is used to improve the matching characteristics of the low-frequency band. Finally, the corrugated horn and the dielectric rod are used to control the radiation characteristics of the low and high frequencies respectively.

[0061] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the infrared detection module 200 includes a thermal infrared sensing head 210, an infrared reflection surface, and a fixed bracket 220. The thermal infrared sensing head 210 is used to transmit the infrared brightness temperature data of the meteorological target to the data processing unit 150 of the device; the infrared reflection surface is used to refract the meteorological target into the thermal infrared sensor of the thermal infrared sensing head 210; the fixed bracket 220 is fixedly connected to the thermal infrared sensing head 210 and the infrared reflection surface, and is fixed to the transmitting antenna 132, so that the infrared detection field of view of the infrared detection module 200 and the radar detection field of view of the transmitting antenna 132 keep the same axis.

[0062] The infrared detection module 200 is mainly composed of a thermal infrared sensing head 210 of an infrared imager, which can be specifically KT19.85, and can also be composed of a fixed bracket 220 and a gold-plated reflective surface. The working frequency band of the infrared sensor of the infrared sensing probe KT19.85 is 9.6-11.5um. The infrared frequency band is transmitted in the atmosphere and is attenuated very little by carbon dioxide and water vapor in the atmosphere, which is suitable for detecting clouds in the sky. The infrared sensing probe 210 is fixed on the transmitting antenna 132 of the radar and automatically scans in real time following the radar transmitting antenna 132. Among them, the infrared sensing probe 210 is installed at an inclined angle and uses a gold-plated reflective film (such as Edmund Optics 45-617) to detect target clouds in the sky, so that the field of view of the infrared detection is completely consistent with the detection angle direction of the millimeter wave radar detection, so that the targets detected by the Ka and W band millimeter wave radars and the infrared band infrared imager are consistent, which reduces the errors caused by the inconsistency in time and space for the later data inversion and improves the data accuracy.

[0063] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the millimeter wave radar detection module 100 further includes a signal processing unit 140 and a data processing unit 150. The signal processing unit 140 is used to process the intermediate frequency signal transmitted by the receiving unit 110 to generate signal processing data; the data processing unit 150 is used to process the signal processing data and infrared brightness temperature data transmitted by the signal processing unit 140 to achieve management of meteorological products and control of the millimeter wave radar detection module 100.

[0064] The data processing unit 150 is mainly composed of hardware such as a computer and a display and related software. The data processing unit 150 is responsible for the control and management of the radar system and the generation, display and management of meteorological products, and can serve as a window for the device to directly face the user.

[0065] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the signal processing unit 110 includes an intermediate frequency digital receiver 141 and a signal processor 142. The intermediate frequency digital receiver 141 is used to digitally demodulate the intermediate frequency signal to obtain the difference frequency echo I / Q signal; the signal processor 142 is used to estimate and process the difference frequency echo I / Q signal to output meteorological target information.

[0066] The signal processor 142 of the signal processing unit 140 uses a general high-performance server, and processes the I / Q signal sent by the intermediate frequency digital integrated processing of the intermediate frequency digital receiver 141 in real time through software, realizes filtering, video integration, FFT and estimation of meteorological elements, and outputs meteorological target information such as intensity, radial velocity, spectrum width, and dual polarization parameters. Software-based signal processing breaks the hardware limitations of the original DSP chip, and can integrate more and more complex signal processing functions and algorithms to meet the needs of refined and intelligent processing of meteorological elements. In addition, software-based signal processing has good scalability, which is conducive to the unified design of the radar back-end processing architecture.

[0067] like Figure 1 and Figure 2 As shown, according to an embodiment of the present disclosure, the intermediate frequency signal transmitted by the receiving unit 110 is processed to generate signal processing data, including: digital sampling, de-frequency modulation, windowing, two-dimensional FFT, incoherent spectrum accumulation, ground clutter filtering, and spectrum parameter estimation of the intermediate frequency signal.

[0068] According to an embodiment of the present disclosure, the device further includes a servo module 300. The servo module 300 is used to receive a control operation instruction to generate a drive signal, and when the drive signal is executed, the antenna feed line unit 130 is controlled to perform scanning detection to generate scanning detection data; wherein the signal processing unit 140 is also used to receive a control operation instruction to generate a positive slope linear frequency modulation signal.

[0069] The servo module 300 is composed of a servo extension and a motor, a reducer, a rotary transformer and a slip ring configured in a turntable. The servo module 300 is used to receive operation instructions issued from a local control / display panel or an operation instruction sent from a radar terminal device, and after calculation and processing by corresponding software, generates a driving signal to control the rotation of the turntable 134 of the antenna feed line unit 130, so that the transmitting antenna 132 and the receiving antenna 131 perform scanning movements in various ways. In addition, the servo module 300 can also be used to receive antenna position information (such as azimuth and elevation, etc.) of the transmitting antenna 132 and the receiving antenna 131, and send the quantized angle information to the terminal device through the rotary transformer.

[0070] like Figure 1 As shown, the turntable 134 includes a horizontal turntable 341 and a pitch turntable 342, wherein the horizontal turntable 341 can be arranged under the millimeter-wave radar detection module 100 and the infrared detection module 200 as a main body support seat, and the horizontal turntable 341 is used to adjust the horizontal rotation of the millimeter-wave radar detection module 100 and the infrared detection module 200 in the horizontal direction. At the same time, the horizontal turntable 341 is connected to the pitch turntable 342 to provide horizontal support for the pitch turntable 342, so that the pitch turntable 342 can relatively adjust the detection pitch angles of the millimeter-wave radar detection module 100 and the infrared detection module 200, thereby achieving consistency in the detection angles of the millimeter-wave radar detection module 100 and the infrared detection module 200.

[0071] The two sides of the pitch turntable 342 are respectively used to connect the transmitting unit 120 and the receiving unit 110 , and a heating component 610 is arranged above the transmitting unit 120 to provide signal transmission guarantee for the transmitting antenna 132 .

[0072] like Figure 2 As shown, the above-mentioned device of the embodiment of the present disclosure also has a monitoring module 400, which is connected to the monitor of each of the above-mentioned component modules and is composed of a parameter feedback unit and monitoring software. The monitoring module 400 mainly completes the collection, transmission and processing of parameters of each module or unit when the above-mentioned device is in a working state, so as to complete the monitoring and control of the working state, and also has the functions of radar parameter setting, fault alarm and diagnosis, radar parameter automatic calibration, etc.

[0073] like Figure 2As shown, the above-mentioned device of the embodiment of the present disclosure also has a power module 500 mainly including UPS, cabin power distribution box, voltage-stabilized power supply, remote control power extension and rectifier power supplies distributed in various modules or units. The power module 500 needs to have power ripple filtering, surge protection, overvoltage and overcurrent impact resistance and professional lightning protection functions; in addition, the DC low-voltage power supply of the power module 500 adopts a mature modular power supply, which has strong short-circuit, overcurrent and overvoltage protection functions, and can automatically restore normal power supply after the fault is eliminated to achieve the power supply effect for the entire device.

[0074] Based on the above description of the millimeter-wave infrared active and passive imaging detection device, it can be seen that the device involves the following four core key technologies and has the following corresponding technical effects:

[0075] (1) For the first time, coaxial scanning of dual-frequency millimeter-wave radar and infrared imaging detection was achieved to ensure the consistency of detection targets.

[0076] By installing the infrared imaging module 200 on the dual-frequency millimeter-wave cloud radar module 100, coaxial scanning is achieved with the radar module 100 to jointly detect meteorological targets such as precipitation and non-precipitation clouds. Therefore, it is possible to achieve the detection of precipitation processes by using three different frequency bands (W band, Ka band and infrared band) to cooperate with each other. Among them, the Ka band radar has a smaller attenuation and a relatively longer wavelength, is more sensitive to particles in precipitation clouds, and has a higher detection sensitivity; the W band radar has a shorter wavelength, and precipitation clouds have a more serious attenuation to it. Therefore, when precipitation occurs, the Ka band radar is more suitable for observing convection processes. The W band radar has a shorter wavelength than the Ka band radar. When the precipitation process moves vertically above the observation area, the W band radar has a higher observation sensitivity to meteorological targets such as cloud blankets and high cirrus clouds. Therefore, the joint observation of the Ka band radar and the W band radar can complement each other and detect the vertical airflow and the phase evolution of particles in the entire precipitation process. When the main body of the precipitation cloud moves out of the vertical area above the radar, the infrared band can be used to observe the infrared brightness temperature data from the cloud base to the cloud top from the side. The infrared brightness temperature data is mainly used to reflect the integral amount of ice crystal particles in the cloud, giving a macroscopic quantitative result, so as to invert the ice water content in the high cloud through the infrared brightness temperature data. In summary, in the precipitation weather process, the Ka band, W band and infrared band need to be observed simultaneously. At different stages of the precipitation process, the three bands complement each other and can jointly complete the continuous observation of the entire severe convection process.

[0077] (2) Multi-source and multi-parameter radar data fusion, quality control and secondary product development technology.

[0078] The above-mentioned device of the disclosed embodiment can realize that each band radar simultaneously and continuously obtains the power spectrum data of the meteorological target and multiple parameters such as reflectivity, radial velocity, spectrum width, linear depolarization ratio, etc. for the same detection target. Through the mutual control of the quality of the detection data, the data quality is further improved (the data accuracy is improved). At the same time, the development of meteorological observation products can be promoted by studying the multi-source multi-parameter data fusion processing technology. By analyzing the echo signals of cloud particles in the Ka band and W band, as well as the infrared brightness temperature data of the cloud base, the purpose of identifying and calculating cloud microphysical parameters such as cloud phase and spectrum distribution is achieved, and by using its good spatial and temporal resolution, macro information such as the position, height, and distribution state of the cloud layer above the observation station can be provided in real time. In addition, based on the basic information detected by cloud radar, radar remote sensing, artificial intelligence, computer graphics and images and meteorological theories such as atmospheric radiation and cloud physics are used to realize the development, management and display of secondary products such as cloud base height, cloud thickness, cloud top height, cloud amount, droplet spectrum distribution, cloud water content, cloud ice content, zero-degree layer bright band identification, cloud rising air velocity, cloud particle phase identification, cloud layer identification, etc.

[0079] In addition, the millimeter wave radar detection module 100 and the infrared detection module 200 can functionally support each other and achieve more beneficial technical effects.

[0080] (3) Complete calibration system.

[0081] For a weather radar system, the weather products output by the radar are credible only if its own working parameters are stable. In the device of the disclosed embodiment, the millimeter wave radar detection module 100 can be calibrated or verified automatically or under manual intervention, and the calibration or verification content includes: transmit power calibration, receiver dual-path receiving characteristic consistency calibration, speed measurement verification, and receiver noise coefficient measurement, which will reduce the variable error affecting the radar equation to a minimum, and the error of the entire radar system can be controlled within 1dB.

[0082] The transmitting unit 120 is specially provided with a coupler for the Ka and W bands and is equipped with a Rohde & Schwarz power meter probe for coupling and processing the output powers of the two solid-state transmitters to obtain the transmission power data, which is then sent to the terminal device by the transmission monitoring board via network communication.

[0083] In order to ensure the measurement accuracy of the depolarization ratio, the gain, noise coefficient and other characteristics of the two receivers should be basically consistent. However, in the case where actual equipment differences always exist, the final manifestation is that even if the input signal of the same power is sent to the dual-channel receiving channel at the same time, the signal-to-noise ratio output by the dual-channel receiver may also have a certain difference, which has a direct impact on the measurement of the depolarization ratio. However, if the difference can be detected regularly, the measured value of the linear depolarization ratio can be corrected according to the detection result. Therefore, in the embodiment of the present disclosure, a consistency calibration function of the dual-channel receiving characteristics can be added, specifically, a power-controllable test signal is used to inject the two receiving channels at the same time, and the difference in the characteristics of the two receivers is automatically detected according to the actual output of the two channels, thereby realizing automatic calibration of linear depolarization.

[0084] The noise coefficient test is realized by using the solid-state noise source in the machine and controlling the power on and off of the noise source. When the noise source is powered on and off, the power ratio sent by the signal processing is read on the terminal software, the radar noise coefficient is calculated, and updated to the signal processing.

[0085] Another aspect of the present disclosure provides a millimeter wave / infrared active and passive imaging detection method, which is applied to the detection of meteorological targets, wherein the above method is implemented based on the above device.

[0086] like Figure 1 and Figure 2 As shown, combined with the description of the above millimeter wave / infrared active and passive imaging detection device, the specific detection process of the device is listed as follows:

[0087] Transmission process: The signal processing unit 140 generates a positive slope linear frequency modulation signal and sends it to the receiving unit 110. After the up-conversion processing of the receiving unit 110, a linear frequency modulated RF excitation signal can be obtained and sent to the transmitting unit 120. The transmitting unit 120 amplifies the Ka-band and W-band RF excitation signals to high-power signals of 50W and 15W respectively. The high-power signal reaches the feed source through the dual-polarization waveguide switch 333, waveguide and the first orthogonal mode coupler 331 of the antenna feed line unit 130, and then is radiated by the transmitting antenna 132.

[0088] Receiving process: The electromagnetic waves radiated by the transmitting antenna 132 encounter the meteorological target, generate backscattering, and form the echo signal of the meteorological target. The receiving antenna 131 of the antenna feed line unit 130 receives the echo signal, and the echo signal passes through the second orthogonal mode coupler 332 and is sent to the co-polarization receiving channel and the orthogonal polarization receiving channel of the receiving unit 110.

[0089] Processing process: The echo signal is amplified by two low-noise amplifiers of the receiving unit 110 and sent to down-conversion to obtain an intermediate frequency echo signal, which is then sent to the signal processing unit 140. After A / D sampling by the signal processing unit 140, digital frequency modulation is performed to obtain the I / Q signal of the difference frequency echo. The I / Q signal is subjected to windowing and first-dimensional FFT processing to obtain the intensity phase distribution of the echo distance, and then second-dimensional FFT processing is performed to obtain the linear power spectrum density distribution of each distance. After ground clutter filtering, the linear power spectrum of each distance library is subjected to spectrum averaging processing, and finally parameter estimation is performed to obtain the basic data of the echo, which is finally sent to the data processing unit 150. At the same time, the data processing unit 150 directly collects, processes, stores, and cooperates with the Ka and W band radars to generate related products for the infrared brightness temperature data fed back by the infrared detection signal of the infrared detection module 200.

[0090] Among them, the millimeter wave radar detection module 100 can obtain parameters such as intensity, speed, spectrum width and linear depolarization ratio when working in the single-transmit dual-receive mode. Specifically, in the dual-transmit dual-receive mode, parameters such as intensity, speed, spectrum width, differential reflectivity factor, two-way differential propagation phase variable, differential propagation phase constant and correlation coefficient can be obtained. The servo module 300 receives the control instruction of the data processing unit 150, generates a corresponding drive signal after calculation and processing, implements scanning control of the antenna rotation azimuth and pitch angle, and transmits the azimuth, elevation angle data, status and fault information corresponding to the antenna to the data processing unit 150. The monitoring module 400 completes the control of the entire device system, fault sampling and system calibration control.

[0091] In the calibration mode, the receiving unit 110 generates an intermediate frequency calibration signal, which is fed into the receiver front end from the calibration switch after up-conversion. The calibration signal calibrates the dual-channel consistency, distance, speed, etc. of the system. The noise coefficient test is achieved by controlling the power on and off of the noise source using the built-in solid-state noise source. The transmitter power intensity is monitored in real time using a high-precision power probe, and the calibration result is sent to the data processing unit 150.

[0092] Among them, the data of the millimeter wave / infrared active and passive imaging detection device of the embodiment of the present disclosure can be divided into two levels: level 1 scientific data and level 2 scientific data. Among them, level 1 scientific data is base data, and level 2 scientific data is cloud products. The base data processing flow includes processes such as DC interference removal, filtering and smoothing, noise level calculation, continuous data segment search, cloud signal identification and spectral parameter extraction, and finally obtains the reflectivity, radial velocity, spectral width, dual polarization parameters and infrared brightness temperature data of radar Ka and W band radar. Cloud products include cloud macroscopic structure products, liquid water volume, ice water content, cloud bottom phase, particle size and other cloud microphysical parameters.

[0093] So far, the embodiments of the present disclosure have been described in detail with reference to the accompanying drawings.

[0094] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A millimeter wave / infrared active and passive imaging detection device, used for the detection of meteorological targets, wherein: include: A millimeter wave radar detection module, used for transmitting a millimeter wave electromagnetic wave detection signal to the meteorological target, and receiving a scattered echo signal generated when the millimeter wave electromagnetic wave detection signal encounters the meteorological target; An infrared detection module, fixed on the transmitting antenna of the millimeter wave radar detection module, is used to perform infrared detection on the meteorological target and obtain infrared brightness temperature data of the meteorological target; The millimeter wave electromagnetic wave detection signal is a high-power detection signal of the Ka band and the W band. The infrared sensing probe of the infrared detection module is installed at an inclined angle, and a gold-plated reflective film is used to detect the target cloud in the sky. The infrared detection field of view of the infrared detection module is consistent with the radar detection field of view of the transmitting antenna, so as to realize the coaxial scanning of the radar detection and the infrared detection, and ensure the consistency of the detection target. The millimeter wave radar detection module includes: A receiving unit, used for performing an up-conversion operation on the received positive slope linear frequency modulation signal to generate a radio frequency excitation signal; A transmitting unit, used for amplifying the radio frequency excitation signal sent by the receiving unit to generate a high-power millimeter wave electromagnetic wave detection signal; An antenna feed line unit, used for receiving the millimeter wave electromagnetic wave detection signal transmitted by the transmitting unit, and transmitting the millimeter wave electromagnetic wave detection signal in the form of dual-polarization continuous wave transmission; a signal processing unit, configured to process the intermediate frequency signal transmitted by the receiving unit to generate signal processing data, The antenna feed line unit is further used to receive the echo signal scattered by the meteorological target due to the millimeter wave electromagnetic wave detection signal, and the receiving unit is further used to receive the echo signal received by the antenna feed line unit to generate an intermediate frequency signal corresponding to the echo signal; Processing the intermediate frequency signal transmitted by the receiving unit to generate signal processing data includes: The intermediate frequency signal is subjected to digital sampling, frequency removal, windowing, two-dimensional FFT, incoherent spectrum accumulation, ground clutter filtering, and spectrum parameter estimation; The receiving unit comprises: A dual-channel receiver front end, used for performing front-end amplification on the echo signal transmitted by the antenna feed line unit to generate an amplified echo signal; A dual-channel receiving channel, used for performing intermediate frequency processing on the amplified echo signal to generate the intermediate frequency signal; A frequency source, used to generate a source signal required to send the radio frequency excitation signal; An excitation unit, configured to perform up-conversion processing on the source signal to obtain the radio frequency excitation signal; A calibration unit, used for performing up-conversion processing on the source signal to obtain a calibration signal, and transmitting the calibration signal to the front end of the dual-channel receiver in a calibration mode to calibrate the intensity and dual-channel consistency, distance, and speed, thereby using a solid-state noise source inside the machine to achieve a noise coefficient test by controlling the power on and off of the noise source; The transmitting unit comprises: A fully solid-state transmitter, used for amplifying the radio frequency excitation signal to generate the millimeter wave electromagnetic wave detection signal; The transmission monitor is used to generate and output the transmission power data of the all-solid-state transmitter to monitor the operating status of the all-solid-state transmitter.

2. The device according to claim 1, wherein: The emission monitor comprises: A power meter probe, used for performing waveguide coupling processing on the measured output power signal of the all-solid-state transmitter to generate the transmission power data; A monitoring board is used to provide working status information of the all-solid-state transmitter.

3. The device according to claim 1, wherein: The antenna feed line unit comprises: A receiving antenna, used for receiving the echo signal; A transmitting antenna, used to transmit the millimeter wave electromagnetic wave detection signal generated by the transmitting unit; A feeder assembly is used to forward the millimeter wave electromagnetic wave detection signal to the transmitting antenna, and forward the echo signal to the dual-channel receiving channel front end of the receiving unit.

4. The device according to claim 1, wherein: The infrared detection module comprises: a thermal infrared sensing head, used to transmit the infrared brightness temperature data of the meteorological target to a data processing unit of the device; An infrared reflecting surface, used for refracting the meteorological target into the thermal infrared sensor of the thermal infrared sensing head; A fixed bracket is fixedly connected to the thermal infrared sensing head and the infrared reflecting surface, and is fixed to the transmitting antenna, so that the infrared detection field of view of the infrared detection module and the radar detection field of view of the transmitting antenna keep the same axis.

5. The device according to claim 1, wherein: The millimeter wave radar detection module also includes: The data processing unit is used to process the signal processing data and the infrared brightness temperature data transmitted by the signal processing unit to achieve the management of meteorological products and the control of the millimeter wave radar detection module.

6. The device according to claim 5, wherein: Also includes: A servo module, used for receiving a control operation instruction to generate a driving signal, and when the driving signal is executed, the antenna feed line unit is controlled to perform scanning detection to generate scanning detection data; The signal processing unit is further used to receive the control operation instruction to generate the positive slope linear frequency modulation signal.

7. The device according to claim 6, wherein: The signal processing unit comprises: An intermediate frequency digital receiver, used for digitally demodulating the intermediate frequency signal to obtain a difference frequency echo I / Q signal; A signal processor is used to estimate and process the difference frequency echo I / Q signal to output the meteorological target information.

8. A millimeter wave / infrared active and passive imaging detection method, applied to the detection of meteorological targets, wherein: The method is implemented based on the device according to any one of claims 1 to 7.

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