Device for positioning communication direction of short-wave radio station by using electromagnetic compatibility technology

Abstract

The invention belongs to the technical field of rapid direction finding and positioning of a radio station communication system, and particularly relates to a device for positioning the communication direction of a short-wave radio station by using an electromagnetic compatibility technology. According to the device, an orientation parameter picking and motor driving module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an electromagnetic compatibility analog processing module, a control unit module, a signal conversion module, a parameter comparison output module, an orientation state locking display module and the like are used; weak signal pickup, azimuth information recording and storage, signal filtering, interference signal shielding, interference signal grounding, pre-stored information calling and three-value ratio difference calculation of the radio short-wave radio station are achieved, and therefore it is ensured that the radio short-wave radio station can be rapidly unfolded, accurately positioned and instantly locked.

Description

Technical Field

[0001] This invention belongs to the technical field of rapid direction finding and positioning in radio communication systems, specifically relating to a device for locating the communication direction of shortwave radios using electromagnetic compatibility technology. Background Technology

[0002] Shortwave communication, with its unique advantages such as being unrestricted by "network hubs" and "active repeaters," strong resistance to disruption and autonomous communication capabilities, long-distance autonomous communication, and low cost, is widely used in communication under special conditions, emergency communication in emergencies, and economical communication. However, because shortwave communication relies on the ionosphere, signal transmission stability is poor, and the signal is greatly affected by the electromagnetic environment. Its antenna size is large, and the requirements for antenna communication direction are also high. To ensure the quality and timeliness of emergency communication in special environments, it is essential to ensure the rapid erection of shortwave radio antennas and accurate positioning of the communication direction. Currently, the erection and direction determination of shortwave radio system antennas are still determined manually using matching antennas and receivers, which is time-consuming, labor-intensive, and inaccurate. Professional station construction relies on specialized electromagnetic field strength instruments and other equipment (which involves numerous testing devices, complex operations, and high costs).

[0003] In emergency situations, especially during disaster relief and military missions, quickly and accurately setting up antennas and determining communication directions presents several challenges: First, shortwave radio antennas are large and difficult to set up and fix, and it is troublesome and time-consuming to find the direction using a receiver. Secondly, shortwave radio communication relies on radio waves to reach the other party through the refraction of the ionosphere in the sky. Therefore, there is a lot of noise, the signal is unstable and greatly affected by the outside world, it is difficult to capture the signal, and it is also difficult to determine the communication direction. Third, the current shortwave radio station requires a relatively long time from direction determination to antenna installation and successful communication, which affects its timeliness. Fourth, existing radio direction finding devices are poor at receiving weak signals due to technical reasons under severe interference. Without adopting new technologies to process signals and interference, it is difficult to capture the required signal during shortwave radio direction finding.

[0004] To address these requirements and problems, and to solve the challenges encountered in quickly locking onto and locating the communication direction of shortwave radios, including: 1. difficulty in acquiring weak signals; 2. large antenna size, inconvenient for mobile installation; 3. long time for locating the communication direction; 4. inaccurate azimuth determination; 5. high cost, large size, and complex operation of professional direction-finding equipment, unsuitable for emergency use; 6. long communication distance and complex electromagnetic environment; and 7. difficulty in changing the geographical location of the radio station, a new device is urgently needed in the field that is portable, easy to operate, highly intelligent, has strong anti-interference capabilities, and provides fast and accurate positioning for shortwave radios. Summary of the Invention

[0005] (a) Technical problems to be solved The technical problem to be solved by this invention is: To address the challenges encountered by shortwave radios in rapidly locating and locking communication direction in emergency situations, including: 1. Difficulty in acquiring weak signals; 2. Large antenna size, inconvenient for relocation and installation; 3. Long communication direction positioning time; 4. Inaccurate azimuth determination; 5. High cost, large size, and complex operation of professional direction-finding equipment, unsuitable for emergency use; 6. Long communication distance and complex electromagnetic environment; 7. Difficulty in changing the geographical location of the radio station, a device using electromagnetic compatibility technology to locate the communication direction of a shortwave radio is needed.

[0006] The principle is as follows: The intelligent rotating antenna, according to instructions, scans within its searchable frequency range. Based on electromagnetic compatibility (EMC) technology, it samples three times, and these samples, along with their corresponding digital displacement angle parameters, form three information packets. Finally, the control unit module stores, calculates, and compares these three packets, selecting the packet with the highest amplitude. The corresponding digital displacement angle parameter within this packet represents the optimal communication direction angle, which is then directly displayed by the display module. Technically, utilizing microcontroller technology and employing EMC-compatible wideband scanning, narrowband separation, single-frequency extraction, filtering, shielding, and grounding circuits, it can accurately filter out various interference signals, quickly capture useful weak signals, and achieve rapid positioning and locking of the shortwave radio communication direction through sampling, storage, retrieval, calculation, and comparison.

[0007] (II) Technical Solution To address the aforementioned technical problems, this invention provides a device for locating the communication direction of a shortwave radio using electromagnetic compatibility (EMC) technology. The device includes: a azimuth parameter acquisition and motor drive module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an EMC analog processing module, a control unit module, a signal conversion module, a parameter comparison and output module, and a azimuth status lock display module; wherein, The orientation parameter acquisition and motor drive module is a synchronous motor drive and orientation information tracking circuit, used to acquire and record instantaneous orientation information and provide synchronous motor drive signals and power in real time. The antenna motor assembly transmission mechanism integrates an azimuth information sensor and a motor, which are used for antenna rotation and azimuth information acquisition. The radio signal scanning and receiving module is a high-gain pickup circuit with a 360-degree antenna, used for automatic scanning, receiving, and amplifying of signals; The electromagnetic compatibility simulation processing module is a circuit that eliminates various types of interference and picks up weak signals. It is used to filter, shield, and ground interference and separate and pick up weak signals. The control unit module is the control circuit of the device, used to control the various circuits in the device and pre-store the orientation information; The signal conversion module is an analog-to-digital conversion circuit for signals within the device, used to separate and extract frequency and amplitude signals and perform analog-to-digital conversion on them; The parameter comparison output module is a three-valued ratio calculation circuit, used to confirm the frequency and compare the amplitude of three directional information signals pre-stored in the memory. The orientation status lock display module is a keying and signal parameter display circuit used to display orientation and other information.

[0008] When the device is working, the transmission mechanism of the antenna motor assembly is activated, the antenna rotates, and the radio signal scanning and receiving module scans the required information signal containing various interferences. The signal is then frequency-converted, and the processed signal enters the electromagnetic compatibility analog processing circuit. The electromagnetic compatibility analog processing circuit reduces interference signals and separates and picks up weak signals through internal circuitry, and then amplifies them. The amplified signal enters the signal conversion circuit, where amplitude adjustment and analog-to-digital conversion are performed before finally being sent to the control unit module. The signal entering the control unit module is confirmed by the internal circuit and first sends a command to the orientation parameter acquisition and motor drive module, instructing it to instantly record the orientation information of the motor rotation and send it back to the control unit module. This information, together with the information from the signal conversion circuit, is packaged and stored under the action of the control unit module to complete the sampling of an information packet.

[0009] According to the program design, the device needs to perform three samples within the same frequency searchable signal range. Then, the control unit module can output an instruction to activate its parameter comparison output module. The three same-frequency information packets stored in the control unit module are also simultaneously called into the parameter comparison output module for parameter comparison according to the instruction. After internal circuit calculation and comparison, the information packet with the highest same-frequency amplitude is output. This information packet enters the control unit module to activate the azimuth status lock display module, and the other enters the azimuth status lock display module directly for display. After receiving the instruction from the control unit module, the azimuth status lock display module displays the frequency, azimuth, and amplitude information completely through its internal circuitry on the display screen.

[0010] In practical use, to more accurately determine the communication direction, manual keying can be used to scan and track multiple times, and then select two or more with the most similar azimuth information at the same frequency.

[0011] The device employs electromagnetic compatibility technology in its various circuit modules, enabling it to operate in the most complex electromagnetic environments and accurately track and search for the required weak signals.

[0012] The orientation parameter acquisition and motor drive module includes: a synchronous motor tracking drive circuit, a sensor signal receiving and amplifying circuit, a recording and amplifying output circuit, and a first interface circuit. When the orientation parameter acquisition and motor drive module is working, the synchronous motor tracking drive circuit is turned on, and the synchronous motor starts to rotate. At this time, the digital displacement sensor installed on the synchronous motor also starts to work and transmits the required displacement orientation information to the sensor signal receiving and amplifying circuit in real time through the first interface circuit according to the instructions. The displacement signal after receiving and preliminary amplification enters the recording and amplifying output circuit for recording and further amplification. Finally, the amplified displacement orientation information is sent to the control unit module through the first interface circuit and stored according to the instructions. The antenna-motor assembly transmission mechanism includes a digital displacement sensor, a synchronous motor, a telescopic gain-doubling omnidirectional antenna, and a mechanical transmission device. The mechanical transmission device and the synchronous motor are integrated. The telescopic gain-doubling omnidirectional antenna is mounted on the mechanical transmission device, and the digital displacement sensor installed inside, together with the synchronous motor, is used for the rotation of the telescopic gain-doubling omnidirectional antenna and the acquisition of azimuth information. During operation, the synchronous motor drives the mechanical transmission device to rotate, and the telescopic gain-doubling omnidirectional antenna rotates accordingly. The digital displacement sensor instantaneously samples the position and azimuth information along with the synchronous motor and transmits it in real time to the azimuth parameter acquisition and motor drive module. The rotation speed of the synchronous motor is controlled by the control unit module, and the angle of the synchronous motor's displacement is executed according to a preset program. The radio signal scanning and receiving module includes an automatic antenna scanning circuit, a radio frequency (RF) signal receiving circuit, a signal amplification circuit, and a second interface circuit. When the radio signal scanning and receiving module is operating, the automatic antenna scanning circuit automatically scans for radio signals from the rotating, telescopic, gain-doubling omnidirectional antenna. When a signal is detected, its internal circuitry activates, and the signal is output to the RF signal receiving circuit. The RF signal receiving circuit filters and shapes the signal before outputting it to the signal amplification circuit. The signal amplification circuit is a dedicated RF amplifier that amplifies the signal to the required amplitude before outputting it to the electromagnetic compatibility analog processing module via the second interface circuit. The electromagnetic compatibility (EMC) simulation processing module includes a filtering simulation circuit, a shielding simulation circuit, a grounding simulation circuit, and a third interface circuit. When the EMC simulation processing module is operating normally, signals containing various interferences from the radio signal scanning receiver module enter the circuit. First, the signal is filtered through the filtering simulation circuit to remove the corresponding interferences. Then, it is sent to the shielding simulation circuit, which shields any interferences that cannot be filtered out. The shielded signal then continues into the grounding simulation circuit, where the remaining small amount of interference is simulated by grounding. This completes the filtering of various interference signals, ensuring that a stable, relatively pure signal suitable for analog-to-digital conversion is output. Under the control of the control unit module, this signal is output to the signal conversion module through the third interface circuit. The control unit module includes a memory circuit, a microcontroller chip circuit, an arithmetic logic unit (ALU) circuit, a fourth interface circuit, and a key control operation circuit. When the control unit module is working normally, it uses the microcontroller chip circuit as its core, along with the memory circuit, ALU circuit, and key control operation circuit, to quickly process, compare, organize, and store the input data signals, generating corresponding instructions which are then output to relevant circuits to control all circuits within the device. All actions within each circuit of the control unit module are executed uniformly by pre-programmed related programs, which can be preset or modified temporarily. The signal conversion module includes a signal separation circuit, a frequency pickup circuit, an amplitude pickup circuit, an analog-to-digital conversion circuit, and a fifth interface circuit. When the signal conversion module is working, the signal from the electromagnetic compatibility analog processing module first enters the signal separation circuit to separate the frequency and amplitude signals. The separated signals are then picked up by the frequency pickup circuit and the amplitude pickup circuit, respectively, and undergo analog-to-digital conversion. Finally, they enter the control unit module through the fifth interface circuit. Secondly, the frequency signal serves as a control signal, and the amplitude signal serves as a parameter indicator signal. The two signals, through the control unit module, determine the communication direction of the shortwave radio. The parameter comparison output module includes an information packet 1 input circuit, an information packet 2 input circuit, an information packet 3 input circuit, a parameter comparison amplification circuit, and a sixth interface circuit. When the parameter comparison output module is working normally, the control unit module inputs a command, and the three information packets simultaneously enter the parameter comparison amplification circuit through their respective input circuits. The parameter comparison amplification circuit calculates and compares the frequency and amplitude of the three information packets, extracts the information packet with the highest amplitude at the same frequency, amplifies it, and outputs it to the azimuth status lock display module through the sixth interface circuit. The orientation status lock display module includes a display screen circuit, a data signal amplification circuit, a data signal input circuit, and a seventh interface circuit. When the orientation status lock display module is working normally, under the action of the control unit module, the information packet data output by the parameter comparison output module first enters the data signal input circuit through the seventh interface circuit. After matching processing, it is then input to the data signal amplification circuit for amplification. After the signal is amplified to the required amplitude, it is sent to the display screen circuit. Finally, the display screen circuit displays the information that needs to be displayed intuitively. The display screen circuit is a dedicated display module controlled by the control unit module.

[0013] Among them, the 360-degree azimuth radio signal scanning and receiving module, under the action of electromagnetic compatibility analog processing circuit, can separate and pick up weak working signals, turn them into instructions, thereby retrieving antenna azimuth information and displaying it on the display screen, thus completing the positioning of the shortwave radio communication direction.

[0014] The device also includes a data storage unit and a manual keying circuit.

[0015] For shortwave communication radios, the device does not require the use of a random antenna or professional directional finding equipment for manual direction finding and positioning. Simply activating the device allows it to intelligently locate the signal direction using a 360-degree omnidirectional antenna. This makes it convenient and widely applicable for the rapid setup of shortwave radios in various emergency and special environments.

[0016] (III) Beneficial Effects Compared with existing technologies, this invention provides a device for locating the communication direction of a shortwave radio station using electromagnetic compatibility (EMC) technology. This device addresses the practical problems of long-distance communication, complex electromagnetic environments, large antennas, tight timeframes, and difficulties in determining the direction of communication when establishing shortwave radio communication in emergency situations. It focuses on portability, simple operation, sensitive signal scanning and pickup, fast positioning speed, and high accuracy. It utilizes EMC technology controlled by a microcontroller, including wideband scanning, narrowband separation, single-frequency extraction, filtering, shielding, and grounding. By sampling weak signals multiple times within the searchable signal range and then storing, recalling, calculating, and comparing them, EMC technology becomes possible and feasible for locating the communication direction of a shortwave radio station. The microcontroller serves as the system control center, and the internal memory acts as a mobile database. A 360-degree omnidirectional telescopic proportional intelligent automatic direction-finding antenna is used, allowing for real-time location and locking of the communication direction simply by handholding the device and inputting the desired parameters through the screen. In addition, through electromagnetic compatibility technology, various interferences are basically eliminated, and weak useful signals can be accurately separated and extracted. This changes the reality that shortwave radios cannot quickly capture useful signals in complex electromagnetic environments under special circumstances. It fills the gap in the field of radio direction finding that there is no dedicated shortwave radio for special missions and emergency situations that is portable, easy to operate, fast in positioning, and highly accurate.

[0017] This invention provides a device for locating the communication direction of shortwave radio stations using electromagnetic compatibility (EMC) technology. The device utilizes a azimuth parameter acquisition and motor drive module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an EMC analog processing module, a control unit module, a signal conversion module, a parameter comparison and output module, and a azimuth status lock display module. This enables rapid orientation of shortwave radio communications in emergency situations, particularly useful for troops rapidly setting up antennas in complex electromagnetic environments during combat, special missions, and disaster relief operations, thus locating the communication direction between radio stations. The greatest advantage of this device is its ability to conveniently and quickly acquire signals, thereby solving the problem of rapidly and accurately locating the communication direction of shortwave radio stations in emergency situations.

[0018] This invention provides a device for locating the communication direction of a shortwave radio using electromagnetic compatibility technology. The device adopts a fully modular design, with each unit being independent and self-contained. It has a robust structure, small size, and intuitive display. It can be used independently or in combination. It is simple to operate, easy to carry, flexible and convenient to use, and highly targeted. Attached Figure Description

[0019] Figure 1 This is a schematic block diagram of the device for locating the communication direction of a shortwave radio using electromagnetic compatibility technology, as described in this invention. Figure 2 This is a schematic diagram of the composition of the orientation parameter acquisition and motor drive module of the present invention; Figure 3 This is a schematic block diagram of the transmission mechanism of the antenna motor assembly of the present invention; Figure 4 This is a schematic block diagram of the radio signal scanning and receiving module of the present invention; Figure 5 This is a schematic diagram of the electromagnetic compatibility simulation processing module of the present invention; Figure 6 This is a schematic diagram of the control unit module of the present invention; Figure 7 This is a schematic diagram of the signal conversion module of the present invention; Figure 8 This is a schematic diagram of the parameter comparison output module of the present invention; Figure 9 This is a schematic diagram of the composition of the orientation status locking display module of the present invention. Detailed Implementation

[0020] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0021] To address the aforementioned technical problems, this invention provides a device for locating the communication direction of a shortwave radio using electromagnetic compatibility (EMC) technology. The device includes: a azimuth parameter acquisition and motor drive module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an EMC analog processing module, a control unit module, a signal conversion module, a parameter comparison and output module, and a azimuth status lock display module; wherein, The orientation parameter acquisition and motor drive module is a synchronous motor drive and orientation information tracking circuit, used to acquire and record instantaneous orientation information and provide synchronous motor drive signals and power in real time. The antenna motor assembly transmission mechanism integrates an azimuth information sensor and a motor, which are used for antenna rotation and azimuth information acquisition. The radio signal scanning and receiving module is a high-gain pickup circuit with a 360-degree antenna, used for automatic scanning, receiving, and amplifying of signals; The electromagnetic compatibility simulation processing module is a circuit that eliminates various types of interference and picks up weak signals. It is used to filter, shield, and ground interference and separate and pick up weak signals. The control unit module is the control circuit of the device, used to control the various circuits in the device and pre-store the orientation information; The signal conversion module is an analog-to-digital conversion circuit for signals within the device, used to separate and extract frequency and amplitude signals and perform analog-to-digital conversion on them; The parameter comparison output module is a three-valued ratio calculation circuit, used to confirm the frequency and compare the amplitude of three directional information signals pre-stored in the memory. The orientation status lock display module is a keying and signal parameter display circuit used to display orientation and other information.

[0022] When the device is working, the transmission mechanism of the antenna motor assembly is activated, the antenna rotates, and the radio signal scanning and receiving module scans the required information signal containing various interferences. The signal is then frequency-converted, and the processed signal enters the electromagnetic compatibility analog processing circuit. The electromagnetic compatibility analog processing circuit reduces interference signals and separates and picks up weak signals through internal circuitry, and then amplifies them; The amplified signal enters the signal conversion circuit, where amplitude adjustment and analog-to-digital conversion are performed before finally being sent to the control unit module. The signal entering the control unit module is confirmed by the internal circuit and first sends a command to the orientation parameter acquisition and motor drive module, instructing it to instantly record the orientation information of the motor rotation and send it back to the control unit module. This information, together with the information from the signal conversion circuit, is packaged and stored under the action of the control unit module to complete the sampling of an information packet.

[0023] According to the program design, the device needs to perform three samples within the same frequency searchable signal range. Then, the control unit module can output an instruction to activate its parameter comparison output module. The three same-frequency information packets stored in the control unit module are also simultaneously called into the parameter comparison output module for parameter comparison according to the instruction. After internal circuit calculation and comparison, the information packet with the highest same-frequency amplitude is output. This information packet enters the control unit module to activate the azimuth status lock display module, and the other enters the azimuth status lock display module directly for display. After receiving the instruction from the control unit module, the azimuth status lock display module displays the frequency, azimuth, and amplitude information completely through its internal circuitry on the display screen.

[0024] In practical use, to more accurately determine the communication direction, manual keying can be used to scan and track multiple times, and then select two or more with the most similar azimuth information at the same frequency.

[0025] The device employs electromagnetic compatibility technology in its various circuit modules, enabling it to operate in the most complex electromagnetic environments and accurately track and search for the required weak signals.

[0026] The orientation parameter acquisition and motor drive module includes: a synchronous motor tracking drive circuit, a sensor signal receiving and amplifying circuit, a recording and amplifying output circuit, and a first interface circuit. When the orientation parameter acquisition and motor drive module is working, the synchronous motor tracking drive circuit is turned on, and the synchronous motor starts to rotate. At this time, the digital displacement sensor installed on the synchronous motor also starts to work and transmits the required displacement orientation information to the sensor signal receiving and amplifying circuit in real time through the first interface circuit according to the instructions. The displacement signal after receiving and preliminary amplification enters the recording and amplifying output circuit for recording and further amplification. Finally, the amplified displacement orientation information is sent to the control unit module through the first interface circuit and stored according to the instructions. The antenna-motor assembly transmission mechanism includes a digital displacement sensor, a synchronous motor, a telescopic gain-doubling omnidirectional antenna, and a mechanical transmission device. The mechanical transmission device and the synchronous motor are integrated. The telescopic gain-doubling omnidirectional antenna is mounted on the mechanical transmission device, and the digital displacement sensor installed inside, together with the synchronous motor, is used for the rotation of the telescopic gain-doubling omnidirectional antenna and the acquisition of azimuth information. During operation, the synchronous motor drives the mechanical transmission device to rotate, and the telescopic gain-doubling omnidirectional antenna rotates accordingly. The digital displacement sensor instantaneously samples the position and azimuth information along with the synchronous motor and transmits it in real time to the azimuth parameter acquisition and motor drive module. The rotation speed of the synchronous motor is controlled by the control unit module, and the angle of the synchronous motor's displacement is executed according to a preset program. The radio signal scanning and receiving module includes an automatic antenna scanning circuit, a radio frequency (RF) signal receiving circuit, a signal amplification circuit, and a second interface circuit. When the radio signal scanning and receiving module is operating, the automatic antenna scanning circuit automatically scans for radio signals from the rotating, telescopic, gain-doubling omnidirectional antenna. When a signal is detected, its internal circuitry activates, and the signal is output to the RF signal receiving circuit. The RF signal receiving circuit filters and shapes the signal before outputting it to the signal amplification circuit. The signal amplification circuit is a dedicated RF amplifier that amplifies the signal to the required amplitude before outputting it to the electromagnetic compatibility analog processing module via the second interface circuit. The electromagnetic compatibility (EMC) simulation processing module includes a filtering simulation circuit, a shielding simulation circuit, a grounding simulation circuit, and a third interface circuit. When the EMC simulation processing module is operating normally, signals containing various interferences from the radio signal scanning receiver module enter the circuit. First, the signal is filtered through the filtering simulation circuit to remove the corresponding interferences. Then, it is sent to the shielding simulation circuit, which shields any interferences that cannot be filtered out. The shielded signal then continues into the grounding simulation circuit, where the remaining small amount of interference is simulated by grounding. This completes the filtering of various interference signals, ensuring that a stable, relatively pure signal suitable for analog-to-digital conversion is output. Under the control of the control unit module, this signal is output to the signal conversion module through the third interface circuit. The control unit module includes a memory circuit, a microcontroller chip circuit, an arithmetic logic unit (ALU) circuit, a fourth interface circuit, and a key control operation circuit. When the control unit module is working normally, it uses the microcontroller chip circuit as its core, along with the memory circuit, ALU circuit, and key control operation circuit, to quickly process, compare, organize, and store the input data signals, generating corresponding instructions which are then output to relevant circuits to control all circuits within the device. All actions within each circuit of the control unit module are executed uniformly by pre-programmed related programs, which can be preset or modified temporarily. The signal conversion module includes a signal separation circuit, a frequency pickup circuit, an amplitude pickup circuit, an analog-to-digital conversion circuit, and a fifth interface circuit. When the signal conversion module is working, the signal from the electromagnetic compatibility analog processing module first enters the signal separation circuit to separate the frequency and amplitude signals. The separated signals are then picked up by the frequency pickup circuit and the amplitude pickup circuit, respectively, and undergo analog-to-digital conversion. Finally, they enter the control unit module through the fifth interface circuit. Secondly, the frequency signal serves as a control signal, and the amplitude signal serves as a parameter indicator signal. The two signals, through the control unit module, determine the communication direction of the shortwave radio. The parameter comparison output module includes an information packet 1 input circuit, an information packet 2 input circuit, an information packet 3 input circuit, a parameter comparison amplification circuit, and a sixth interface circuit. When the parameter comparison output module is working normally, the control unit module inputs a command, and the three information packets simultaneously enter the parameter comparison amplification circuit through their respective input circuits. The parameter comparison amplification circuit calculates and compares the frequency and amplitude of the three information packets, extracts the information packet with the highest amplitude at the same frequency, amplifies it, and outputs it to the azimuth status lock display module through the sixth interface circuit. The orientation status lock display module includes a display screen circuit, a data signal amplification circuit, a data signal input circuit, and a seventh interface circuit. When the orientation status lock display module is working normally, under the action of the control unit module, the information packet data output by the parameter comparison output module first enters the data signal input circuit through the seventh interface circuit. After matching processing, it is then input to the data signal amplification circuit for amplification. After the signal is amplified to the required amplitude, it is sent to the display screen circuit. Finally, the display screen circuit displays the information that needs to be displayed intuitively. The display screen circuit is a dedicated display module controlled by the control unit module.

[0027] Among them, the 360-degree azimuth radio signal scanning and receiving module, under the action of electromagnetic compatibility analog processing circuit, can separate and pick up weak working signals, turn them into instructions, thereby retrieving antenna azimuth information and displaying it on the display screen, thus completing the positioning of the shortwave radio communication direction.

[0028] The device also includes a data storage unit and a manual keying circuit.

[0029] For shortwave communication radios, the device does not require the use of a random antenna or professional directional finding equipment for manual direction finding and positioning. Simply activating the device allows it to intelligently locate the signal direction using a 360-degree omnidirectional antenna. This makes it convenient and widely applicable for the rapid setup of shortwave radios in various emergency and special environments.

[0030] Example 1 To address the challenges of establishing shortwave radio communication in emergency situations, such as long communication distances, complex electromagnetic environments, large antennas, tight deadlines, and difficulties in determining direction, this invention provides a portable, easy-to-operate device that utilizes electromagnetic compatibility (EMC) technology to locate the communication direction of a shortwave radio station. This device is characterized by its high sensitivity in picking up and scanning signals, fast positioning speed, and high accuracy. The device is small in size, fully functional, and easy to use. In particular, it utilizes EMC technology, employing a method of multiple sampling within the searchable signal range followed by storage, retrieval, calculation, and comparison to determine the communication direction. This allows for accurate positioning and rapid locking of the communication direction of shortwave radio stations established during emergency troop deployments, disaster relief, and emergency situations. It significantly improves the flexibility of rapid positioning of shortwave radio communication directions in emergency situations and solves the problem of rapid and accurate positioning when establishing shortwave radio communication systems in temporary, emergency, and mobile states.

[0031] like Figure 1As shown, the present invention provides a device for locating the communication direction of a shortwave radio using electromagnetic compatibility technology, comprising an azimuth parameter acquisition and motor drive module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an electromagnetic compatibility analog processing module, a control unit module, a signal conversion module, a parameter comparison and output module, and an azimuth status lock display module. The system comprises the following modules: Azimuth parameter acquisition and motor drive module, a synchronous motor drive and azimuth information tracking circuit, used for instantaneous azimuth information acquisition, recording, and real-time provision of synchronous motor drive signals and power; Antenna motor assembly transmission mechanism, with its internal azimuth information sensor and motor, used for antenna rotation and azimuth information acquisition; Radio signal scanning and receiving module, a 360-degree high-gain acquisition circuit for automatic signal scanning, reception, and amplification; Electromagnetic compatibility analog processing module, a circuit for eliminating various interferences and acquiring weak signals, used for filtering, shielding, grounding interference, and separating and acquiring weak signals; Control unit module, the system control circuit for controlling various circuits within the device and pre-storing azimuth information; Signal conversion module, an analog-to-digital conversion circuit for separating and extracting frequency and amplitude signals and performing analog-to-digital conversion; Parameter comparison output module, a parameter difference calculation circuit for frequency confirmation and amplitude comparison of three azimuth information signals pre-stored in memory; and Azimuth status lock display module, a keying and signal parameter display circuit for displaying azimuth and other information. When the device is working, the transmission mechanism of the antenna motor assembly is activated, the antenna rotates, and the radio signal scanning and receiving module scans the required information signal containing various interferences. After the signal is frequency-converted by the receiving circuit, the processed signal enters the electromagnetic compatibility analog processing module. The electromagnetic compatibility analog processing module reduces interference and useless signals through its internal circuitry, separates and picks up weak signals, and amplifies them. The amplified signal enters the signal conversion module, where amplitude adjustment and analog-to-digital conversion are performed before being sent to the control unit module. The signal entering the control unit module is confirmed by its internal circuitry and first sends a command to the azimuth parameter acquisition and motor drive module, instructing it to instantly record the azimuth information of the motor rotation and send it back to the control unit module. This information, together with the information from the signal conversion module, is packaged and stored under the action of the control unit module, completing the sampling of an information packet. According to the program design, the device needs to sample three times within the same-frequency searchable signal range. Then, the control unit module can output a command to activate its parameter comparison output module. Simultaneously, the three same-frequency information packets stored in the control unit module are also called into this module for parameter comparison according to the command. After internal circuit calculation and comparison, the information packet with the highest same-frequency amplitude is output. This information packet enters the control unit to activate the azimuth status lock display module, and also directly enters the azimuth status lock display module for display. Upon receiving the command from the control unit module, the azimuth status lock display module displays the frequency, azimuth, amplitude, and other information on the screen through its internal circuitry. In actual use, to more accurately determine the communication direction, manual keying can be used to perform multiple scans and tracks, selecting two or more azimuth information packets with the closest same frequency.In addition, because the circuit uses electromagnetic compatibility technology, the device can operate in the most complex electromagnetic environments and accurately track and search for the weak signals required.

[0032] The composition and working principle of each module are explained in detail below.

[0033] like Figure 2 As shown, the orientation parameter acquisition and motor drive module includes: a synchronous motor tracking drive circuit, a sensor signal receiving and amplifying circuit, a recording and amplifying output circuit, and an interface circuit. When the orientation parameter acquisition and motor drive module is working, the synchronous motor tracking drive circuit is activated, and the motor begins to rotate (the rotation speed depends on the control unit module). At this time, the digital displacement sensor installed on the motor also starts working and transmits the required displacement orientation information to the signal receiving and amplifying circuit in real time according to instructions. After signal processing within the circuit, the information is input to the recording and amplifying output circuit. Finally, the amplified orientation information signal is sent to the control unit module for recording and storage through the interface circuit.

[0034] like Figure 3 As shown, the antenna motor assembly transmission mechanism includes a digital displacement sensor, a synchronous motor, a telescopic gain-doubling omnidirectional antenna, a mechanical transmission device, and an interface circuit. The mechanical transmission device and motor are integrated, with the antenna mounted on the transmission device. The digital displacement sensor installed inside, along with the motor, is used for antenna rotation and azimuth information acquisition. During operation, the motor drives the mechanical transmission device to rotate. Firstly, the antenna rotates accordingly, and as its azimuth changes, it can synchronously scan for useful radio signals and transmit them to subsequent circuits via the interface circuit. Secondly, the digital displacement sensor rotates, instantly sampling position and angle information and transmitting it to subsequent circuits in real time via the interface circuit. The rotation speed is controlled by the control unit module, and the motor displacement angle is executed according to a preset program.

[0035] like Figure 4 As shown, the radio signal scanning and receiving module includes an automatic antenna scanning circuit, a radio frequency signal receiving circuit, a signal amplification circuit, and an interface circuit. When the radio signal scanning and receiving module is working, the automatic antenna scanning circuit automatically scans for radio signals from the rotating antenna. When a signal is detected, its internal dedicated circuits activate, and the signal is output to the radio frequency signal receiving circuit. This circuit filters and mixes the signal to form a signal of a fixed frequency, which is then output to the signal amplification circuit. The signal amplification circuit is a dedicated signal amplifier that amplifies the signal to the required amplitude before outputting it to the electromagnetic compatibility analog processing module through its interface circuit.

[0036] like Figure 5As shown, the electromagnetic compatibility (EMC) simulation processing module includes a filtering simulation circuit, a shielding simulation circuit, a grounding simulation circuit, and an interface circuit. When the EMC simulation processing circuit is operating normally, signals containing various interferences from the radio signal scanning receiving module enter the circuit. First, the signals are filtered by a dedicated filtering module to remove the corresponding interferences. Then, the signals are sent to the shielding circuit, which can shield any interferences that cannot be filtered out. The shielded signals then enter the grounding circuit, where the remaining small amount of interference is simulated and grounded to ensure a stable, relatively pure signal that meets the requirements for analog-to-digital conversion. Finally, the relatively pure useful signal, after passing through a signal amplification circuit, is output to the signal conversion module through the interface circuit under the control of the control unit module, thus completing the purpose of filtering out various interference signals and picking up the useful signal.

[0037] like Figure 6 As shown, the control unit module includes a memory circuit, a microcontroller chip circuit, an arithmetic logic unit (ALU) circuit, an interface circuit, and a key control circuit. During normal operation, the microcontroller chip, along with the memory, ALU, and key control circuit, rapidly processes, compares, organizes, and stores input data signals, generating corresponding instructions which are then output to relevant circuits to control all circuits within the device. All actions within the circuit are executed by a pre-programmed program, which can be preset or modified temporarily.

[0038] like Figure 7 As shown, the signal conversion module includes a signal separation circuit, a frequency pickup circuit, an amplitude pickup circuit, two analog-to-digital conversion circuits, and an interface circuit. When the signal conversion module is working, the signal from the electromagnetic compatibility analog processing module passes through the interface circuit and first enters the signal separation circuit to separate the frequency and amplitude signals. The separated signals are then picked up by the frequency and amplitude pickup circuits, undergo corresponding analog-to-digital conversion, and finally enter the control unit module through the interface circuit. Additionally, the converted digital signal, along with information from the azimuth parameter pickup and motor drive modules, is packaged and stored for later retrieval and comparison. Furthermore, the frequency signal serves as the control signal, and the amplitude signal serves as the parameter indicator signal; the two signals, through the control unit, determine the communication direction of the shortwave radio.

[0039] like Figure 8As shown, the parameter comparison output module includes an information packet 1 input circuit, an information packet 2 input circuit, an information packet 3 input circuit, a parameter comparison amplification circuit, and an interface circuit. During normal operation, after three samplings within the same frequency searchable range are completed, the control unit module inputs a command, and the three information packets simultaneously enter the parameter comparison amplification circuit through their respective input circuits. Its internal circuits calculate and compare the frequency, amplitude, etc., of the three information packets, extract the information packet with the highest amplitude at the same frequency, amplify it, and output it to the azimuth status lock display module through the interface circuit.

[0040] like Figure 9 The orientation status locking display module shown includes a display screen circuit, a data signal amplification circuit, a data signal input circuit, and an interface circuit. During normal operation, under the control unit module, the information packet data output by the parameter comparison output module first passes through the distribution circuit in the interface circuit board to the data signal input circuit. After circuit matching processing, it is then input to the data signal amplification circuit for amplification. The signal is then amplified to the required amplitude and sent to the display screen circuit. Finally, the display screen circuit displays the required information visually. The display screen circuit is a dedicated display module controlled by the control unit module.

[0041] The following is an analysis and summary of the process of using a device that utilizes electromagnetic compatibility technology to locate the communication direction of a shortwave radio in the field, specifically how it enables radio operation and accurate direction positioning under normal, emergency, special, and other conditions: 1. Under normal circumstances, shortwave radio communication can be established and the communication direction can be accurately located.

[0042] The device for locating the communication direction of a shortwave radio using electromagnetic compatibility (EMC) technology operates as follows: First, unfold the retractable intelligent direction-finding antenna and install it on the antenna motor assembly's transmission mechanism. Hold the assembled device, turn on the power, input the desired operating frequency using the keypad, and press the start button. The red light will flash, and the antenna will automatically begin rotating. When the radio signal scanning and receiving module inside the device detects the operating frequency (if no signal is found after one rotation, the antenna will continue rotating until the corresponding operating frequency signal is detected), the internal circuitry will process the signal accordingly and then send it to the EMC analog processing module. Within this module, the circuit utilizes electromagnetic compatibility technology to completely eliminate various interference signals through internal circuitry, separating and picking up interference-free amplitude and operating frequency signals. After amplification and analog-to-digital conversion, these signals are sent to the control unit module. The signals entering the control unit module are confirmed by the internal circuitry and first send a command to the azimuth parameter acquisition and motor drive module. Upon receiving the command, this module instantly records the azimuth information of the motor rotation and sends it back to the control unit module. Under the action of the control unit module, this azimuth information and the information from the signal conversion module are packaged together and stored, completing the sampling of an information packet. According to the program design, after the device performs three samplings at the same frequency within the searchable signal range, the control unit module outputs a command, activating the parameter comparison output module. The three same-frequency information packets stored in the control unit module are retrieved and compared in this module. After internal circuit calculation and comparison, the information packet with the highest amplitude at the same frequency is selected. This information packet enters the control unit to activate the azimuth status lock display module, and also directly enters the azimuth status lock display module. The internal circuit then displays the frequency, azimuth, amplitude, and other information on the screen. When coordinate data appears on the screen, the red light stops flashing, and the green light illuminates, this indicates the communication direction data for the shortwave radio. If the antenna keeps rotating, it means no signal has been found or the signal is too weak. The device can be raised or moved until the antenna stabilizes and coordinate values ​​appear. In actual use, to more accurately determine the communication direction, manual keying can be used to perform multiple scans and tracks, selecting two or more signals with the closest azimuth information at the same frequency. Furthermore, because the circuit employs electromagnetic compatibility technology, the device can operate in the most complex electromagnetic environments and accurately track and search for the required weak signal.

[0043] 2. For emergency and special circumstances, establish shortwave radio communication and accurately locate communication directions. The device for locating the communication direction of a shortwave radio using electromagnetic compatibility technology faces challenges in emergency and special situations, including complex environments, tight schedules, and the need for rapid setup. Therefore, it's crucial to first locate a prominent position and determine the communication direction before moving to the work site. Then, deploy the retractable intelligent direction-finding antenna and install it on the antenna motor assembly's transmission mechanism. Holding the assembled device, turn on the power, input the desired direction-finding frequency using the keypad, and press the start button. The red light will flash, and the antenna will automatically begin rotating. When the internal radio signal scanning and receiving module detects the working frequency (if no signal is found after one rotation, the antenna will continue rotating until the corresponding signal is detected), the internal circuitry will... The signal is processed accordingly and then sent to the electromagnetic compatibility analog processing module. In this module, the circuit uses electromagnetic compatibility technology to completely eliminate various interference signals through internal circuitry, separating and picking up the interference-free amplitude signal and operating frequency signal. After amplification and analog-to-digital conversion, the signal is sent to the control unit module. The signal entering the control unit module is confirmed by the internal circuitry and first sends a command to the azimuth parameter acquisition and motor drive module. After receiving the command, this module instantly records the azimuth information of the motor rotation and sends it back to the control unit module. Under the action of the control unit module, this azimuth information and the information from the signal conversion module are packaged together and stored to complete the sampling of an information packet. According to the program design, after the device performs three samplings at the same frequency within the searchable signal range, the control unit module outputs a command, activating the parameter comparison output module. The three same-frequency information packets stored in the control unit module are retrieved and compared in this module. After internal circuit calculation and comparison, the information packet with the highest amplitude at the same frequency is selected. This information packet enters the control unit to activate the azimuth status lock display module, and also directly enters the azimuth status lock display module. The internal circuit then displays the frequency, azimuth, amplitude, and other information on the screen. When coordinate data appears on the screen, the red light stops flashing, and the green light illuminates, this indicates the communication direction data for the shortwave radio. If the antenna keeps rotating, it means no signal has been found or the signal is too weak. The device can be raised or moved until the antenna stabilizes and coordinate values ​​appear. In actual use, to more accurately determine the communication direction, manual keying can be used to perform multiple scans and tracks, selecting two or more signals with the closest azimuth information at the same frequency. Furthermore, because the circuit employs electromagnetic compatibility technology, the device can operate in the most complex electromagnetic environments and accurately track and search for the required weak signal.

[0044] 3. For non-shortwave radio communication, positioning and locking communication direction. This device, which uses electromagnetic compatibility (EMC) technology to locate the direction of shortwave radio communication, faces challenges when used for non-shortwave radio communication, such as high frequency, wide bandwidth, and different antenna types. Therefore, it's essential to first replace the antenna with the appropriate one, then modify the frequency range using a frequency programmer (the interface is pre-designed on the interface module), and finally install it on the antenna motor assembly's transmission mechanism. Holding the assembled device, turning on the power, inputting the desired direction-finding frequency via the keypad, and pressing the start button, the red light flashes, and the antenna automatically begins rotating. When the internal radio signal scanning and receiving module detects the working frequency (if no signal is found after one rotation, the antenna will continue rotating until the corresponding working frequency signal is detected), the internal circuitry will... The signal is processed accordingly and then sent to the electromagnetic compatibility (EMC) analog processing module. In this module, the circuit uses EMC technology to completely eliminate various interference signals through internal circuitry, separating and picking up the interference-free amplitude signal and operating frequency signal. After amplification and analog-to-digital conversion, the signal is sent to the control unit module. The signal entering the control unit module is confirmed by the internal circuitry and first sends a command to the azimuth parameter acquisition and motor drive module. Upon receiving the command, this module instantly records the azimuth information of the motor rotation and sends it back to the control unit module. Under the action of the control unit module, this azimuth information and the information from the signal conversion module are packaged together and stored, completing the sampling of an information packet. According to the program design, after the device performs three samplings at the same frequency within the searchable signal range, the control unit module outputs a command, activating the parameter comparison output module. The three same-frequency information packets stored in the control unit module are retrieved and compared in this module. After internal circuit calculation and comparison, the information packet with the highest amplitude at the same frequency is selected. This information packet enters the control unit to activate the azimuth status lock display module, and also directly enters the azimuth status lock display module. The internal circuit then displays the frequency, azimuth, amplitude, and other information on the screen. When coordinate data appears on the screen, the red light stops flashing, and the green light illuminates, this indicates the communication direction data for the radio. If the antenna keeps rotating, it means no signal has been found or the signal is too weak. The device can be raised or moved until the antenna stabilizes and coordinate values ​​appear. In actual use, to more accurately determine the communication direction, manual keying can be used to perform multiple scans and tracks, selecting two or more azimuth information packets with the closest frequencies. Since this device is designed for shortwave radios, it may require repeated operation for non-shortwave radios to obtain the most accurate data. In addition, because the circuit uses electromagnetic compatibility technology, the device can operate in the most complex electromagnetic environments and accurately track and search for the weak signals required.

[0045] In summary, this invention addresses the following problems with existing shortwave radios in emergency and special situations: 1. Difficulty in capturing weak signals; 2. Large antenna size, inconvenient for mobile installation; 3. Long time required to determine communication direction; 4. Inaccurate azimuth determination; 5. High cost, large size, and complex operation of professional direction-finding equipment, unsuitable for emergency use; 6. Long communication distance and complex electromagnetic environment; 7. Difficulty in changing the geographical location of the radio station. Technically, this invention utilizes electromagnetic compatibility (EMC) technology and related circuits to accurately filter out various interference signals, quickly capture useful weak signals, and implement a storage, retrieval, calculation, and comparison method for frequency and amplitude comparison. Furthermore, it employs a single-chip microcomputer control system and internal memory database technology to reasonably solve the aforementioned problems. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility (EMC) technology includes: a azimuth parameter acquisition and motor drive module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an EMC analog processing module, a control unit module, a signal conversion module, a parameter comparison and output module, and a azimuth status lock display module. Furthermore, the device can not only quickly reduce interference signals and accurately separate and acquire the necessary weak information using EMC technology, but also simplify and refine the design of the direction-finding circuit. It achieves full modularity of the circuit, resulting in a small size, multiple functions, and portability. Moreover, this device is suitable not only for use in disaster relief, emergency troop deployment, and the establishment of temporary shortwave radio communication systems, but also for use by amateur shortwave radio enthusiasts, and can be used in emergency situations for non-shortwave radio stations (with the option to replace the antenna if necessary), maximizing the device's operational efficiency.

[0046] In summary, this invention belongs to the technical field of rapid direction finding and positioning in radio communication systems. Specifically, it relates to a device for locating the communication direction of a shortwave radio station using electromagnetic compatibility (EMC) technology. The device incorporates a novel design concept that integrates a combination of EMC technology (filtering, shielding, and grounding) for signal filtering, shielding, and grounding, along with a three-value ratio difference calculation method and pre-storage, retrieval, and comparison of azimuth information. Through the use of a azimuth parameter acquisition and motor drive module, an antenna-motor assembly transmission mechanism, a radio signal scanning and receiving module, an EMC analog processing module, a control unit module, a signal conversion module, a parameter comparison output module, and a azimuth status locking display module, it achieves weak signal acquisition, azimuth information recording and storage, signal filtering, interference signal shielding, interference signal grounding, pre-stored information retrieval, and three-value ratio difference calculation method. The value difference calculation ensures that the shortwave radio station can be quickly deployed, accurately located, and instantly locked. This invention utilizes electromagnetic compatibility technology to quickly reduce interference signals and accurately separate and pick up the required information, making its circuit design simpler, more intelligent, and smaller. This invention can be applied in various emergency situations requiring rapid establishment of shortwave radio communication, as well as in situations requiring non-shortwave radio communication. It can accurately and intuitively display communication azimuth parameters and directly record signal azimuth information and perform 360-degree tracking and scanning to pick up weak signals via a stepper motor. It also allows for repeated manual operation to select the optimal azimuth. Furthermore, the antenna of this invention is a telescopic, gain-doubling omnidirectional antenna with a fully modular internal circuit design, making it small, portable, and easy to use.

[0047] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for locating the communication direction of a shortwave radio using electromagnetic compatibility technology, characterized in that, The device includes: an azimuth parameter acquisition and motor drive module, an antenna motor assembly transmission mechanism, a radio signal scanning and receiving module, an electromagnetic compatibility analog processing module, a control unit module, a signal conversion module, a parameter comparison and output module, and an azimuth status lock display module; wherein... The orientation parameter acquisition and motor drive module is a synchronous motor drive and orientation information tracking circuit, used to acquire and record instantaneous orientation information and provide synchronous motor drive signals and power in real time. The antenna motor assembly transmission mechanism integrates an azimuth information sensor and a motor, which are used for antenna rotation and azimuth information acquisition. The radio signal scanning and receiving module is a high-gain pickup circuit with a 360-degree antenna, used for automatic scanning, receiving, and amplifying of signals; The electromagnetic compatibility simulation processing module is a circuit that eliminates various types of interference and picks up weak signals. It is used to filter, shield, and ground interference and separate and pick up weak signals. The control unit module is the control circuit of the device, used to control the various circuits in the device and pre-store the orientation information; The signal conversion module is an analog-to-digital conversion circuit for signals within the device, used to separate and extract frequency and amplitude signals and perform analog-to-digital conversion on them; The parameter comparison output module is a three-valued ratio calculation circuit, used to confirm the frequency and compare the amplitude of three directional information signals pre-stored in the memory. The orientation status lock display module is a keying and signal parameter display circuit used to display orientation and other information.

2. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in claim 1, characterized in that, When the device is working, the transmission mechanism of the antenna motor assembly is activated, the antenna rotates, and the radio signal scanning and receiving module scans the required information signal containing various interferences. After scanning the signal, the signal is frequency-converted and the processed signal enters the electromagnetic compatibility analog processing circuit. The electromagnetic compatibility analog processing circuit reduces interference signals and separates and picks up weak signals through internal circuitry, and then amplifies them. The amplified signal enters the signal conversion circuit, where amplitude adjustment and analog-to-digital conversion are performed before finally being sent to the control unit module. The signal entering the control unit module is confirmed by the internal circuit and then first sends a command to the orientation parameter acquisition and motor drive module, so that it instantly records the orientation information of the motor rotation and sends it back to the control unit module. This information, along with the information from the signal conversion circuit, is packaged and stored under the control unit module to complete the sampling of an information packet.

3. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in claim 2, characterized in that, According to the program design, the device needs to perform three samplings within the same frequency searchable signal range. Then, the control unit module can output an instruction to make its parameter comparison output module work. The three same frequency information packets stored in the control unit module are also called into the parameter comparison output module for parameter comparison according to the instruction. After internal circuit calculation and comparison, the information packet with the highest same frequency amplitude is output. One of these information packets enters the control unit module to make the azimuth status lock display module work, and the other directly enters the azimuth status lock display module for display. After receiving instructions from the control unit module, the azimuth status lock display module uses its internal circuitry to display the frequency, azimuth, and amplitude information on the screen.

4. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in claim 3, characterized in that, In practical use, to more accurately determine the communication direction, manual keying can be used to scan and track multiple times, and then select two or more with the most similar azimuth information at the same frequency.

5. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in claim 4, characterized in that, The circuit modules of the device employ electromagnetic compatibility technology, enabling the device to operate in the most complex electromagnetic environments and accurately track and search for the required weak signals.

6. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in claim 5, characterized in that, The orientation parameter acquisition and motor drive module includes: a synchronous motor tracking drive circuit, a sensor signal receiving and amplifying circuit, a recording and amplifying output circuit, and a first interface circuit. When the orientation parameter acquisition and motor drive module is working, the synchronous motor tracking drive circuit is turned on, and the synchronous motor starts to rotate. At this time, the digital displacement sensor installed on the synchronous motor also starts to work and transmits the required displacement orientation information to the sensor signal receiving and amplifying circuit in real time through the first interface circuit according to the instructions. The displacement signal after receiving and initial amplification enters the recording and amplifying output circuit for recording and further amplification. Finally, the amplified displacement orientation information is sent to the control unit module through the first interface circuit and stored according to the instructions. The antenna-motor assembly transmission mechanism includes a digital displacement sensor, a synchronous motor, a telescopic gain-doubling omnidirectional antenna, and a mechanical transmission device. The mechanical transmission device and the synchronous motor are integrated. The telescopic gain-doubling omnidirectional antenna is mounted on the mechanical transmission device, and the digital displacement sensor installed inside, together with the synchronous motor, is used for the rotation of the telescopic gain-doubling omnidirectional antenna and the acquisition of azimuth information. During operation, the synchronous motor drives the mechanical transmission device to rotate, and the telescopic gain-doubling omnidirectional antenna rotates accordingly. The digital displacement sensor instantaneously samples the position and azimuth information along with the synchronous motor and transmits it in real time to the azimuth parameter acquisition and motor drive module. The rotation speed of the synchronous motor is controlled by the control unit module, and the angle of the synchronous motor's displacement is executed according to a preset program. The radio signal scanning and receiving module includes an automatic antenna scanning circuit, a radio frequency (RF) signal receiving circuit, a signal amplification circuit, and a second interface circuit. When the radio signal scanning and receiving module is operating, the automatic antenna scanning circuit automatically scans for radio signals from the rotating, telescopic, gain-doubling omnidirectional antenna. When a signal is detected, its internal circuitry activates, and the signal is output to the RF signal receiving circuit. The RF signal receiving circuit filters and shapes the signal before outputting it to the signal amplification circuit. The signal amplification circuit is a dedicated RF amplifier that amplifies the signal to the required amplitude before outputting it to the electromagnetic compatibility analog processing module via the second interface circuit. The electromagnetic compatibility (EMC) simulation processing module includes a filtering simulation circuit, a shielding simulation circuit, a grounding simulation circuit, and a third interface circuit. When the EMC simulation processing module is operating normally, signals containing various interferences from the radio signal scanning receiver module enter the circuit. First, the signal is filtered through the filtering simulation circuit to remove the corresponding interferences. Then, it is sent to the shielding simulation circuit, which shields any interferences that cannot be filtered out. The shielded signal then continues into the grounding simulation circuit, where the remaining small amount of interference is simulated by grounding. This completes the filtering of various interference signals, ensuring that a stable, relatively pure signal suitable for analog-to-digital conversion is output. Under the control of the control unit module, this signal is output to the signal conversion module through the third interface circuit. The control unit module includes a memory circuit, a microcontroller chip circuit, an arithmetic logic unit (ALU) circuit, a fourth interface circuit, and a key control operation circuit. When the control unit module is working normally, it uses the microcontroller chip circuit as its core, along with the memory circuit, ALU circuit, and key control operation circuit, to quickly process, compare, organize, and store the input data signals, generating corresponding instructions which are then output to relevant circuits to control all circuits within the device. All actions within each circuit of the control unit module are executed uniformly by pre-programmed related programs, which can be preset or modified temporarily. The signal conversion module includes a signal separation circuit, a frequency pickup circuit, an amplitude pickup circuit, an analog-to-digital conversion circuit, and a fifth interface circuit. When the signal conversion module is working, the signal from the electromagnetic compatibility analog processing module first enters the signal separation circuit to separate the frequency and amplitude signals. The separated signals are then picked up by the frequency pickup circuit and the amplitude pickup circuit, respectively, and undergo analog-to-digital conversion. Finally, they enter the control unit module through the fifth interface circuit. Secondly, the frequency signal serves as a control signal, and the amplitude signal serves as a parameter indicator signal. The two signals, through the control unit module, determine the communication direction of the shortwave radio. The parameter comparison output module includes an information packet 1 input circuit, an information packet 2 input circuit, an information packet 3 input circuit, a parameter comparison amplification circuit, and a sixth interface circuit. When the parameter comparison output module is working normally, the control unit module inputs a command, and the three information packets simultaneously enter the parameter comparison amplification circuit through their respective input circuits. The parameter comparison amplification circuit calculates and compares the frequency and amplitude of the three information packets, extracts the information packet with the highest amplitude at the same frequency, amplifies it, and outputs it to the azimuth status lock display module through the sixth interface circuit. The orientation status lock display module includes a display screen circuit, a data signal amplification circuit, a data signal input circuit, and a seventh interface circuit. When the orientation status lock display module is working normally, under the action of the control unit module, the information packet data output by the parameter comparison output module first enters the data signal input circuit through the seventh interface circuit. After matching processing, it is then input to the data signal amplification circuit for amplification. After the signal is amplified to the required amplitude, it is sent to the display screen circuit. Finally, the display screen circuit displays the information that needs to be displayed intuitively. The display screen circuit is a dedicated display module controlled by the control unit module.

7. The device for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in claim 6, characterized in that, The 360-degree azimuth radio signal scanning and receiving module, under the action of electromagnetic compatibility analog processing circuit, can separate and pick up weak working signals, turn them into instructions, thereby retrieving antenna azimuth information and displaying it on the display screen, thus completing the positioning of the shortwave radio communication direction.

8. The apparatus for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in any one of claims 1 to 7, characterized in that, The device also includes a data storage unit and a manual keying circuit.

9. The apparatus for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in any one of claims 1 to 7, characterized in that, For shortwave communication radios, the device does not require the use of a random antenna or professional directional finding equipment for manual direction finding and positioning. Simply by activating the device, it can intelligently locate the signal direction using a 360-degree omnidirectional antenna. This makes it convenient and widely applicable for the rapid setup of shortwave radios in various emergency and special environments.

10. The apparatus for locating the communication direction of a shortwave radio station using electromagnetic compatibility technology as described in any one of claims 1 to 7, characterized in that, In the device, the intelligent rotating antenna, according to instructions, scans within its searchable frequency range and, based on electromagnetic compatibility (EMC) technology, samples three times, forming three information packets with their corresponding antenna rotation digital displacement angle parameters. The control unit module then stores, calculates, and compares these three information packets, selecting the packet with the highest amplitude. The corresponding antenna rotation digital displacement angle parameter within this packet represents the optimal communication direction angle to be found, and this is directly displayed by the display module. Technically, utilizing microcontroller technology and employing EMC-compatible wideband scanning, narrowband separation, single-frequency extraction, filtering, shielding, and grounding circuits, it can accurately filter out various interference signals, quickly capture useful weak signals, and achieve rapid positioning and locking of the shortwave radio communication direction through sampling, storage, retrieval, calculation, and comparison.

Images