FM modulation transmitting apparatus

Abstract

The utility model provides a kind of FM modulation transmitting device, including the external interface group for receiving external signal, FM modulator for modulating received external signal, controller for controlling modulated signal and display component for displaying modulated signal.The utility model realizes wired or small range wireless broadcast type voice announcement, audio program broadcast etc. Operation, with small size, deployment quick, wide coverage and frequency adjustable range Large advantages such as range, solve the problem of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficult to meet the signal conversion requirements of special equipment.

Description

Technical Field

[0001] This utility model mainly relates to the field of communication processing technology, specifically to an FM modulation transmitter. Background Technology

[0002] In current communication scenarios, audio broadcasting and signal transmission needs in certain special areas and emergency situations face significant technical bottlenecks. Existing solutions are insufficient to fully meet the requirements of flexibility, deployment efficiency, and coverage in practical applications. Specific problems are as follows: I. Insufficient communication coverage in remote and special areas In remote areas without public communication signal coverage, such as outdoor campsites, offshore vessels, mountain settlements, and some school campuses, traditional wired broadcasting systems require advance wiring, resulting in long construction periods, high costs, and poor flexibility. They are difficult to adapt quickly to temporary or mobile voice announcements and audio program broadcasting needs. Meanwhile, conventional wireless communication equipment (such as walkie-talkies) is limited by communication distance and simplex mode, making it impossible to achieve large-scale, multi-receiver broadcast information transmission. This leads to low information synchronization efficiency within the area and cannot meet the needs of scenarios such as collective notifications and public audio services.

[0003] II. Poor equipment compatibility in emergency communication scenarios When natural disasters such as earthquakes, floods, and typhoons occur, existing public communication infrastructure (such as base stations and broadcasting towers) is easily damaged, leading to regional communication disruptions. In such situations, emergency rescue relies on temporary broadcasting systems to achieve cluster notifications, enabling rapid organization of personnel evacuation and the transmission of rescue instructions. However, existing emergency communication equipment is mostly specialized large-scale equipment, which suffers from problems such as large size, heavy weight, and complex deployment procedures, making it difficult for a small number of personnel to quickly set up and activate it; moreover, some equipment only supports a single signal mode (such as only supporting voice intercom), and cannot achieve audio signal modulation and long-distance transmission, failing to meet the core requirements of "rapid deployment, wide coverage, and multi-purpose" in emergency scenarios.

[0004] III. The signal conversion requirements of special equipment are difficult to meet. In scenarios such as broadcast television program transmission and specific industrial audio monitoring, there is a need to separate audio signals and convert them into radio frequency signals for long-distance wired transmission. Existing signal conversion equipment is mostly customized products with poor adaptability—either it only supports fixed-frequency signal conversion and cannot adjust parameters according to transmission distance or environmental interference; or it requires additional peripheral equipment such as amplification and filtering, resulting in low system integration, complex operation, and high equipment costs. This makes it difficult to meet the signal conversion needs of small-to-medium-scale scenarios (such as small broadcasting stations and localized industrial monitoring), presenting a dual contradiction of "functional redundancy" and "insufficient practicality." Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an FM modulation transmitter that addresses the shortcomings of the existing technology, thereby solving the problems of insufficient communication coverage and poor equipment adaptability in remote and special areas.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: An FM modulation transmitting device includes an external interface group for receiving external signals, an FM modulator for modulating the received external signals, a controller for controlling the modulated signals, and a display component for displaying the modulated signals. The signal transmission terminals of the external interface group are respectively connected to the first signal transmission terminal of the FM modulator, the DC-3.3V power input terminal of the FM modulator, the DC-5V power input terminal of the display component, and the DC-3.3V power input terminal of the controller. The second signal transmission terminal of the FM modulator is connected to the first control signal transmission terminal of the controller. The display signal output terminal of the controller is connected to the display signal input terminal of the display component.

[0007] The beneficial effects of this utility model are: through the external interface group, FM modulator, controller and display components, it realizes wired or small-range wireless broadcast voice announcements, audio program broadcasts and other operations. It has the advantages of small size, quick deployment, wide coverage and large frequency adjustable range. It solves the problems of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special equipment.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Furthermore, the external interface group includes a power interface, a switch, an audio interface, and an SMA RF interface; The DC-12V power input terminal of the switch is connected to an external 12V power adapter through the power interface. The power output terminal of the switch is connected to the DC-3.3V power input terminal of the FM modulator, the DC-5V power input terminal of the display component, and the DC-3.3V power input terminal of the controller, respectively. The audio signal input terminal of the FM modulator is connected to an external microphone through the audio interface. The control signal output terminal of the FM modulator is connected to an external transmitting antenna through the SMA RF interface.

[0010] The beneficial effects of adopting the above-mentioned further solution are: it realizes the processing of multi-interface signals, and also realizes wired or small-range wireless broadcast-style voice announcements, audio program broadcasts, and other operations.

[0011] Furthermore, the FM modulator includes an FM processor and a 9018 amplifier circuit; The audio signal input terminal of the FM processor is connected to an external microphone through the audio interface. The DC-3.3V power input terminal of the FM processor is connected to the power output terminal of the switch. The control signal transmission terminal of the FM processor is connected to the first control signal transmission terminal of the controller. The FM signal output terminal of the FM processor is connected to the FM signal input terminal of the 9018 amplifier circuit. The control signal output terminal of the 9018 amplifier circuit is connected to an external transmitting antenna through the SMA RF interface.

[0012] The beneficial effects of adopting the above-mentioned further solution are: it realizes the broadcasting of FM wireless audio signals in a small area, and also realizes the conversion between audio signals and radio frequency signals, thus achieving the purpose of long-distance wired transmission.

[0013] Furthermore, the display component includes a ZLG7289BS chip and a digital tube; The DC-5V power input terminal of the ZLG7289BS chip is connected to the signal transmission terminal of the external interface group, the display signal output terminal of the controller is connected to the display signal input terminal of the ZLG7289BS chip, and the display signal output terminal of the ZLG7289BS chip is connected to the display signal input terminal of the digital tube.

[0014] The beneficial effects of adopting the above-mentioned further solution are: it can display the device, and has the advantages of small size, quick deployment, wide coverage and large frequency adjustable range. It solves the problems of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special equipment.

[0015] Furthermore, the FM modulation transmitter also includes a power supply component, which includes an SCT2230TVB chip and an ASM1117 chip. The power output terminal of the switch is connected to the power input terminal of the SCT2230TVB chip and the power input terminal of the ASM1117 chip, respectively. The DC-5V power output terminal of the SCT2230TVB chip is connected to the DC-5V power input terminal of the display component. The DC-3.3V power output terminal of the ASM1117 chip is connected to the DC-3.3V power input terminal of the controller and the DC-3.3V power input terminal of the FM modulator, respectively.

[0016] The beneficial effect of adopting the above-mentioned further solution is that it can provide multiple power sources for the device, thus ensuring the power supply of the device.

[0017] Furthermore, the FM modulation transmitter also includes a key input component, the control signal transmission end of which is connected to the second control signal transmission end of the controller.

[0018] The beneficial effect of adopting the above-mentioned further solutions is that it enables control over operating parameters and equipment status.

[0019] Furthermore, the controller is an STM32F103 chip.

[0020] The beneficial effects of adopting the above-mentioned further solutions are: it enables wired or small-area wireless broadcast-style voice announcements and audio program broadcasts, and has the advantages of small size, quick deployment, wide coverage and large frequency adjustable range. It solves the problems of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special equipment. Attached Figure Description

[0021] Figure 1 One of the circuit connection diagrams of an FM modulation transmitter provided in this embodiment of the present invention; Figure 2 A second wiring diagram of an FM modulation transmitter provided for an embodiment of this utility model; Figure 3 The third diagram shows the wiring connection of an FM modulation transmitter provided in this embodiment of the present invention. Detailed Implementation

[0022] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0023] like Figure 1 As shown, an FM modulation transmitting device includes an external interface group for receiving external signals, an FM modulator for modulating the received external signals, a controller for controlling the modulated signals, and a display component for displaying the modulated signals. The signal transmission terminals of the external interface group are respectively connected to the first signal transmission terminal of the FM modulator, the DC-3.3V power input terminal of the FM modulator, the DC-5V power input terminal of the display component, and the DC-3.3V power input terminal of the controller. The second signal transmission terminal of the FM modulator is connected to the first control signal transmission terminal of the controller. The display signal output terminal of the controller is connected to the display signal input terminal of the display component.

[0024] It should be understood that the main control module (i.e., the controller) consists of an STM32F103 series microcontroller and its peripheral circuits. It is designed by programming an FM modulation module (i.e., an FM modulator), a digital tube (i.e., a display component), and a key driver program to realize the conversion of audio signals and FM signals and parameter control.

[0025] In the above embodiments, wired or small-range wireless broadcast voice announcements and audio program broadcasts are realized through external interface groups, FM modulators, controllers and display components. It has the advantages of small size, quick deployment, wide coverage and large frequency adjustable range, and solves the problems of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special equipment.

[0026] Optionally, as one embodiment of this utility model, such as Figures 1 to 3 As shown, the external interface group includes a power interface, a switch, an audio interface, and an SMA RF interface. The DC-12V power input terminal of the switch is connected to an external 12V power adapter through the power interface. The power output terminal of the switch is connected to the DC-3.3V power input terminal of the FM modulator, the DC-5V power input terminal of the display component, and the DC-3.3V power input terminal of the controller, respectively. The audio signal input terminal of the FM modulator is connected to an external microphone through the audio interface. The control signal output terminal of the FM modulator is connected to an external transmitting antenna through the SMA RF interface.

[0027] It should be understood that the external interface (i.e., the external interface group) mainly consists of a power input interface (i.e., the power interface), a power switch (i.e., the switch), a 3.5mm audio input jack (i.e., the audio interface), and an SMA RF output interface (i.e., the SMA RF interface).

[0028] In the above embodiments, the processing of multi-interface signals is realized, as well as wired or small-range wireless broadcast voice announcements, audio program broadcasts and other operations are realized.

[0029] Optionally, as an embodiment of the present invention, the FM modulator includes an FM processor and a 9018 amplifier circuit; The audio signal input terminal of the FM processor is connected to an external microphone through the audio interface. The DC-3.3V power input terminal of the FM processor is connected to the power output terminal of the switch. The control signal transmission terminal of the FM processor is connected to the first control signal transmission terminal of the controller. The FM signal output terminal of the FM processor is connected to the FM signal input terminal of the 9018 amplifier circuit. The control signal output terminal of the 9018 amplifier circuit is connected to an external transmitting antenna through the SMA RF interface.

[0030] Specifically, the FM modulation module (i.e., FM modulator) mainly consists of an FM integrated chip (i.e., FM processor), a 9018 amplifier tube (i.e., 9018 amplifier circuit) and its peripheral circuits. The FM integrated chip (i.e., FM processor) mainly realizes the conversion between audio and FM modulation signals, and the 9018 amplifier tube (i.e., 9018 amplifier circuit) mainly realizes the amplification of the output FM signal, thereby realizing the transmission of FM signals with higher power.

[0031] In the above embodiments, FM wireless audio signal broadcasting within a small range was realized, as well as the conversion between audio signals and radio frequency signals, achieving the purpose of long-distance wired transmission.

[0032] Optionally, as an embodiment of this utility model, the display component includes a ZLG7289BS chip and a digital tube; The DC-5V power input terminal of the ZLG7289BS chip is connected to the signal transmission terminal of the external interface group, the display signal output terminal of the controller is connected to the display signal input terminal of the ZLG7289BS chip, and the display signal output terminal of the ZLG7289BS chip is connected to the display signal input terminal of the digital tube.

[0033] Specifically, the digital tube control module (i.e., display component) mainly consists of a 4-digit common cathode diode (i.e., digital tube), a ZLG7289BS control chip (i.e., ZLG7289BS chip), and its peripheral circuits. The peripheral circuits convert the digital tube control interface into a serial interface and lead it out to the microcontroller (i.e., controller) for processing.

[0034] The above embodiments are capable of displaying the device and have advantages such as small size, quick deployment, wide coverage and large frequency adjustable range. They solve the problems of insufficient communication coverage in remote and special areas, poor device adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special devices.

[0035] Optionally, as an embodiment of the present invention, the FM modulation transmitter further includes a power supply component, which includes an SCT2230TVB chip and an ASM1117 chip. The power output terminal of the switch is connected to the power input terminal of the SCT2230TVB chip and the power input terminal of the ASM1117 chip, respectively. The DC-5V power output terminal of the SCT2230TVB chip is connected to the DC-5V power input terminal of the display component. The DC-3.3V power output terminal of the ASM1117 chip is connected to the DC-3.3V power input terminal of the controller and the DC-3.3V power input terminal of the FM modulator, respectively.

[0036] Specifically, the power management module (i.e., power supply component) consists of one ASM117 (i.e., ASM1117 chip), one SCT2230TVB (i.e., SCT2230TVB chip), and their peripheral circuits. The ASM117 (i.e., ASM1117 chip) mainly provides a stable 3.3V power supply to the microcontroller (i.e., controller) and FM module (i.e., FM modulator), while the SCT2230TVB (i.e., SCT2230TVB chip) provides power to the digital tube and control module (i.e., display component), ensuring the normal operation of the device.

[0037] In the above embodiments, multiple power sources can be provided for the device, ensuring the device's power supply.

[0038] Optionally, as an embodiment of the present invention, the FM modulation transmitter further includes a key input component, wherein the control signal transmission end of the key input component is connected to the second control signal transmission end of the controller.

[0039] Specifically, the button input module (i.e., button input component) consists of 7 buttons, which respectively control the frequency +, frequency -, volume +, volume -, transmit power +, transmit power -, and start / stop, thereby realizing the control of operating parameters and device status.

[0040] In the above embodiments, control over operating parameters and equipment status is achieved.

[0041] Optionally, as an embodiment of this utility model, the controller is an STM32F103 chip.

[0042] The above embodiments realize wired or small-area wireless broadcast voice announcements, audio program broadcasts and other operations. They have the advantages of small size, quick deployment, wide coverage and large frequency adjustable range. They solve the problems of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special equipment.

[0043] Optionally, as another embodiment of this utility model, 1. For camps, ships at sea, campuses, and mountainous areas in remote areas without communication signal coverage, this utility model can be used to realize wireless broadcast-style voice announcements, audio program broadcasts, and other operations. It can also be used to build temporary broadcast systems to realize emergency cluster broadcast notifications and rapid rescue operations when original communication equipment is damaged due to natural disasters; 2. This utility model can separate the audio of broadcast television programs for special equipment and convert it into radio frequency signals for long-distance transmission.

[0044] Optionally, as another embodiment of this utility model, this utility model realizes the conversion between audio signals and radio frequency signals based on FM modulation. It can be directly connected to a transmitting antenna at the output to realize small-range FM wireless audio signal broadcasting; it can also be used as a signal converter to convert audio signals into radio frequency signals to achieve long-distance wired transmission. The device includes input buttons, digital tubes, and indicator lights, and the operating parameters such as modulation frequency, audio volume, and transmission power can be adjusted according to actual needs, so it can be flexibly applied to different areas and places.

[0045] Optionally, as another embodiment of this utility model, it consists of two parts: a main control board and a device housing. The main control board can be further divided into a main control module, an FM modulation module, a power distribution module, a key detection module, a digital tube control module, and external interfaces. When using the device, first turn on the power switch. Then, use the digital tube and keys to set parameters such as the FM modulation frequency, modulation volume, and transmission power. Connect the audio signal (e.g., from a microphone or device audio output) to the device. Pressing the start button will then enable real-time conversion and transmission of the audio signal and modulation signal. If it is in wireless broadcast mode with an antenna, it can broadcast FM audio signals over a small area. If it is in wired transmission mode with a radio frequency cable, it can convert and transmit audio and radio frequency signals. By controlling the input audio, the corresponding application scenario can be achieved.

[0046] Optionally, as another embodiment of this utility model, this utility model converts audio signals to radio frequency signals based on FM modulation. It can be directly connected to a transmitting antenna at the output to achieve small-range FM wireless audio signal broadcasting; it can also be used as a signal converter to convert audio signals to radio frequency signals for long-distance wired transmission. It can be widely applied in remote areas without communication signal coverage, such as campsites, ships at sea, campuses, and mountainous areas, to achieve wireless broadcast-style voice announcements and audio program broadcasts. It can also be used to build temporary broadcast systems for emergency cluster broadcast notifications and rapid rescue operations when original communication equipment is damaged due to natural disasters. Furthermore, it can be used as an input signal converter for special equipment, such as for separating the audio of broadcast television programs and converting it to radio frequency signals for long-distance transmission.

[0047] Optionally, as another embodiment of this utility model, the protection points of this utility model are as follows: 1. Solutions to problems with FM modulation transmitters; 2. Innovations in FM modulation transmitters that are not imitated.

[0048] Optionally, as another embodiment of this utility model, normal use of this utility model only requires connecting the power port, audio port and SMA RF interface of the device as needed, connecting the power and turning on the switch to configure parameters and perform operation.

[0049] The method of using this utility model is as follows: a. Connect the power adapter (i.e., external 12V power adapter) to the power interface, connect the audio signal source (such as a microphone) (i.e., audio interface) as needed, and connect the RF output load (such as a transmitting antenna) to the RF interface (i.e., SMA RF interface) as needed; b. Turn on the device power switch (i.e., switch) and wait for initialization to complete; c. Display the configured modulation frequency, volume, transmission power, and other parameters as needed through the buttons (i.e., button input component) and digital tube (i.e. display component); d. Click the start button to start working; e. At this time, the voice input will be converted into the FM modulation signal of the configured parameters in real time and output through the SMA interface (i.e., SMA RF interface); f. After use, disconnect the power storage device (i.e., this utility model).

[0050] The advantages of this utility model are that it realizes wired or small-range wireless broadcast voice announcements and audio program broadcasts, and has the advantages of small size, quick deployment, wide coverage and large frequency adjustable range. It solves the problems of insufficient communication coverage in remote and special areas, poor equipment adaptability in emergency communication scenarios and difficulty in meeting the signal conversion requirements of special equipment.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model. At the same time, the present utility model does not involve the content of computer program improvement.

Claims

1. An FM modulation transmitter, characterized in that, It includes an external interface group for receiving external signals, an FM modulator for modulating the received external signals, a controller for controlling the modulated signals, and a display component for displaying the modulated signals. The signal transmission terminals of the external interface group are respectively connected to the first signal transmission terminal of the FM modulator, the DC-3.3V power input terminal of the FM modulator, the DC-5V power input terminal of the display component, and the DC-3.3V power input terminal of the controller. The second signal transmission terminal of the FM modulator is connected to the first control signal transmission terminal of the controller. The display signal output terminal of the controller is connected to the display signal input terminal of the display component.

2. The FM modulation transmitting device according to claim 1, characterized in that, The external interface group includes a power interface, a switch, an audio interface, and an SMA RF interface; The DC-12V power input terminal of the switch is connected to an external 12V power adapter through the power interface. The power output terminal of the switch is connected to the DC-3.3V power input terminal of the FM modulator, the DC-5V power input terminal of the display component, and the DC-3.3V power input terminal of the controller, respectively. The audio signal input terminal of the FM modulator is connected to an external microphone through the audio interface. The control signal output terminal of the FM modulator is connected to an external transmitting antenna through the SMA RF interface.

3. An FM modulation transmitting device according to claim 2, characterized in that, The FM modulator includes an FM processor and a 9018 amplifier circuit. The audio signal input terminal of the FM processor is connected to an external microphone through the audio interface. The DC-3.3V power input terminal of the FM processor is connected to the power output terminal of the switch. The control signal transmission terminal of the FM processor is connected to the first control signal transmission terminal of the controller. The FM signal output terminal of the FM processor is connected to the FM signal input terminal of the 9018 amplifier circuit. The control signal output terminal of the 9018 amplifier circuit is connected to an external transmitting antenna through the SMA RF interface.

4. An FM modulation transmitting device according to claim 1, characterized in that, The display components include a ZLG7289BS chip and a digital tube; The DC-5V power input terminal of the ZLG7289BS chip is connected to the signal transmission terminal of the external interface group, the display signal output terminal of the controller is connected to the display signal input terminal of the ZLG7289BS chip, and the display signal output terminal of the ZLG7289BS chip is connected to the display signal input terminal of the digital tube.

5. An FM modulation transmitting device according to claim 2, characterized in that, The FM modulation transmitter also includes a power supply component, which includes an SCT2230TVB chip and an ASM1117 chip. The power output terminal of the switch is connected to the power input terminal of the SCT2230TVB chip and the power input terminal of the ASM1117 chip, respectively. The DC-5V power output terminal of the SCT2230TVB chip is connected to the DC-5V power input terminal of the display component. The DC-3.3V power output terminal of the ASM1117 chip is connected to the DC-3.3V power input terminal of the controller and the DC-3.3V power input terminal of the FM modulator, respectively.

6. An FM modulation transmitting device according to claim 1, characterized in that, The FM modulation transmitter also includes a key input component, the control signal transmission end of which is connected to the second control signal transmission end of the controller.

7. An FM modulation transmitting device according to any one of claims 1 to 6, characterized in that, The controller is an STM32F103 chip.

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