Information broadcasting crossing sounder
By designing an information broadcasting loudspeaker, and adopting an insulated base and integrated circuit structure, the problem of high cost of level crossing loudspeakers was solved. Stable use in low-temperature environments and diversified functions were achieved, reducing the cost of renovation and improving the pedestrian warning effect.
Patent Information
- Application Number
- CN202520049497.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-09
AI Technical Summary
The existing railway crossings have multiple locations, resulting in excessively high total costs for purchasing new voice-activated audio equipment. There is an urgent need for a compact, stable, reliable, and fully functional voice-activated audio equipment for railway crossings to reduce costs.
An information broadcasting speaker was designed, which adopts an insulating base, circuit board, potentiometer, transparent cover and metal rod structure. The circuit board includes power supply, voice module and power amplifier circuit. It uses JQ8900 integrated voice module and TDA2009 power amplifier integrated circuit, has multiple protection functions and supports flexible replacement of voice content.
It achieves stable use in low-temperature environments, reduces modification costs, offers diverse functions, improves pedestrian warning effects, and has low maintenance costs.
Smart Images
Figure CN223872361U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of railway crossing alarm devices, specifically relating to an information broadcasting crossing speaker. Background Technology
[0002] A railway crossing sounder, also known as a crossing alarm or crossing warning sounder, is a safety device used at railway crossings. Its main function is to emit an audible alarm to remind vehicles and pedestrians to be vigilant when a train approaches the crossing. Usually, this device is linked to the crossing's signal system. When a train approaches, the sounder automatically activates and emits a clear warning sound. Traditional bell-shaped warning sounds are usually the DKY-3 type crossing sounders. With the development of digital railways and the construction of intelligent crossings, in order to ensure the safety of train traffic at crossings, it is necessary to replace them with new voice-activated sounders to meet the needs of railways.
[0003] However, since there are usually multiple railway crossings, the total cost of purchasing new voice loudspeakers is too high. There is an urgent need for a small, convenient, stable, reliable, and fully functional voice loudspeaker for railway crossings to achieve cost reduction. Utility Model Content
[0004] The purpose of this utility model is to provide an information broadcasting voice at railway crossings, in order to solve the problem mentioned in the background art that, due to the fact that there are usually multiple railway crossings, the total cost of purchasing new voice voices is too high, and there is an urgent need for a small, convenient, stable, reliable, and fully functional voice voice at railway crossings to achieve cost reduction.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an information broadcasting speaker, comprising an insulating base and a circuit board disposed on the insulating base;
[0006] A potentiometer is provided on the circuit board, screw holes are provided at the four corners above the insulating base, a transparent cover is provided on the outside of the circuit board, mounting screws are provided at the four corners of the transparent cover, and a metal rod is provided on the top of the transparent cover;
[0007] The circuit on the circuit board includes a power supply circuit, a voice module circuit, a power amplifier circuit, and a control circuit. The power supply circuit uses a DC 24V power supply and is equipped with a 0.5A fuse for protection. The voice module circuit uses a JQ8900 integrated voice module, and the power amplifier circuit uses a TDA2009 power amplifier integrated circuit.
[0008] Preferably, the power amplifier circuit uses the TDA2009 power amplifier integrated circuit, which has complete internal protection circuits, including overcurrent, overvoltage, overheat, surge power protection and output circuit break protection. In the typical OTL output form, the output terminal is connected to an output DC blocking capacitor, which can protect the speaker at the moment of power-on and power-off.
[0009] Preferably, the TDA power amplifier integrated circuit has a maximum operating voltage of 28V, a typical operating voltage of 24V, a normal operating voltage of 8V~28V, an output power of dual 10W, a distortion rate of less than 0.5%, an input impedance of 100KΩ, an output impedance of less than 1Ω, and an operating temperature range of -40℃~+150℃.
[0010] Preferably, the TDA2009 power amplifier integrated circuit has advantages such as low power consumption, low distortion, and high reliability. At the same time, this integrated circuit also has multiple protection functions such as overheat protection and short circuit protection, which can ensure the stability and safety of the equipment.
[0011] Preferably, the voice module circuit uses the JQ8900 integrated voice module, which can play prompts or alarms with near-MP3 music quality. The voice module can flexibly change the voice content in the SPI-flash, eliminating the hassle of installing a host computer to change the voice in traditional voice modules.
[0012] Preferably, the SPI-flash can be directly simulated as a USB flash drive, just like copying a USB flash drive, which is very convenient. The USB data cable connects to the module, and when plugged into a computer, the computer will automatically recognize it, making it convenient to copy audio. At the same time, it can also work normally in an environment of -40℃ to +50℃, ensuring that the sound quality is not distorted.
[0013] Preferably, the metal rod is rotatably connected to the transparent cover, and the transparent cover is fixedly installed by mounting screws and screw holes on the insulating base.
[0014] Compared with the prior art, this utility model provides an information broadcasting loudspeaker, which has the following beneficial effects:
[0015] This road crossing loudspeaker can be used stably in low temperatures and meet the requirements. At the same time, the cost of modification is much lower than the cost of purchasing a new loudspeaker. Moreover, due to its simple structure, the cost of maintenance is greatly reduced.
[0016] This level crossing loudspeaker has multiple functions, including voice alarm for vehicle occupation, voice alarm for equipment failure, and voice alarm for unauthorized entry into the level crossing area. Compared with traditional bell-shaped warning loudspeakers, it has more diverse functions and improves the warning effect of the level crossing loudspeaker on pedestrians. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0018] Figure 2 This is a schematic diagram of the internal structure of the transparent outer cover of this utility model.
[0019] Figure 3 This is the circuit diagram of this utility model.
[0020] In the diagram: 1. Metal rod; 2. Transparent cover; 3. Mounting screw; 4. Insulating base; 5. Potentiometer; 6. Circuit board; 7. Screw hole. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] This utility model provides, for example Figure 1-3 The information broadcasting speaker shown includes an insulating base 4 and a circuit board 6 disposed on the insulating base 4.
[0023] A potentiometer 5 is provided on the circuit board 6, screw holes 7 are provided at the four corners above the insulating base 4, a transparent cover 2 is provided on the outside of the circuit board 6, mounting screws 3 are provided at the four corners of the transparent cover 2, and a metal rod 1 is provided on the top of the transparent cover 2.
[0024] The circuits on circuit board 6 include a power supply circuit, a voice module circuit, a power amplifier circuit, and a control circuit. The power supply circuit uses a DC 24V power supply and is equipped with a 0.5A fuse for protection. The voice module circuit uses a JQ8900 integrated voice module, and the power amplifier circuit uses a TDA2009 power amplifier integrated circuit.
[0025] In this embodiment, the level crossing loudspeaker is a safety device used at railway crossings. Its main function is to issue an audible alarm to remind vehicles and pedestrians to be vigilant when a train approaches the crossing. Usually, this device is linked to the crossing's signal system. When a train approaches, the loudspeaker will automatically activate and emit a clear warning sound. When using and installing the level crossing loudspeaker, it should be installed in a conspicuous location at the railway crossing to ensure that it can effectively cover the line of sight of passing vehicles and pedestrians. At the same time, it is also necessary to train local residents and staff on the use and safety knowledge of the level crossing loudspeaker to improve their awareness of railway safety.
[0026] like Figure 1 and Figure 3As shown, the power amplifier circuit uses the TDA2009 power amplifier integrated circuit, which has comprehensive internal protection circuitry, including overcurrent, overvoltage, overheat, surge power protection, and output circuit break protection. In its typical OTL output configuration, the output terminal is connected to an output DC blocking capacitor, which protects the speaker during power-on and power-off. The TDA2009 power amplifier integrated circuit has a maximum operating voltage of 28V, a typical operating voltage of 24V, and a normal operating voltage of 8V~28V. It has a dual 10W output power, a distortion rate of less than 0.5%, an input impedance of 100KΩ, an output impedance of less than 1Ω, and an operating temperature range of -40℃ to +150℃. The TDA2009 power amplifier integrated circuit features low power consumption, low distortion, and high reliability. It also includes overheat protection and short-circuit protection. With multiple protection functions, the device's stability and safety are guaranteed. The voice module circuit uses the JQ8900 integrated voice module, which can play prompts or alarms with near-MP3 music quality. The voice module can flexibly change the voice content in the SPI-flash, eliminating the hassle of installing a host computer to change the voice in traditional voice modules. The SPI-flash can be directly simulated as a USB flash drive, just like copying a USB flash drive, which is very convenient. The USB data cable connects to the module, and when plugged into a computer, the computer will automatically recognize it, making it easy to copy audio. At the same time, it can also work normally in an environment of -40℃ to +50℃, ensuring that the sound quality is not distorted. The metal rod 1 is rotatably connected to the transparent cover 2, and the transparent cover 2 is fixedly installed by the mounting screw 3 and the screw hole 7 on the insulating base 4.
[0027] Preferably, when the crossroads loudspeaker is tested at an outdoor temperature of 20 degrees Celsius, the volume is relatively large, and with a current of 300mA-600mA, it can operate continuously for 2 hours and 20 minutes without sound distortion, indicating that the loudspeaker functions normally. However, when the loudspeaker is tested in an oven at a high temperature of 55-60 degrees Celsius with a current of 300mA-600mA, sound distortion occurs after 15 minutes of continuous operation, and the fuse blows when the current increases to 1400mA. When the test temperature is lowered to -18 degrees Celsius, with a current of 300mA-600mA, sound distortion occurs after 1 hour and 10 minutes of continuous operation, and the fuse blows again when the current increases to 1400mA. The loudspeaker can operate stably at a low temperature of -32 degrees Celsius, meeting the usage requirements. Furthermore, the modification cost is significantly lower than purchasing a new loudspeaker, and the simple structure greatly reduces subsequent maintenance costs.
[0028] Preferably, this level crossing sounder can deliver three alarm voices: a normal alarm when there is a vehicle at the level crossing: "Beware of trains, do not rush across!"; an alarm when the level crossing equipment malfunctions: "Level crossing equipment malfunction, please beware of trains!"; and a warning when a vehicle or pedestrian crosses the prohibition line into the level crossing area: "You have entered the prohibition line, please leave immediately to avoid affecting the lowering of the barrier!". Compared to traditional bell-shaped warning sounds, this system offers more diverse functions.
[0029] Optionally, the voice content of the crossing loudspeaker can be changed as needed.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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.
Claims
1. An information broadcasting loudspeaker, comprising an insulating base (4) and a circuit board (6) disposed on the insulating base (4); A potentiometer (5) is provided on the circuit board (6), screw holes (7) are provided at the four corners above the insulating base (4), a transparent cover (2) is provided on the outside of the circuit board (6), mounting screws (3) are provided at the four corners of the transparent cover (2), and a metal rod (1) is provided on the top of the transparent cover (2). Its features are: The circuit on the circuit board (6) includes a power supply circuit, a voice module circuit, a power amplifier circuit and a control circuit. The power supply circuit uses a DC 24V power supply and is equipped with a 0.5A fuse for protection. The voice module circuit uses a JQ8900 integrated voice module and the power amplifier circuit uses a TDA2009 power amplifier integrated circuit.
2. The information broadcasting speaker according to claim 1, characterized in that: The power amplifier circuit uses the TDA2009 power amplifier integrated circuit, which has complete internal protection circuits, including overcurrent, overvoltage, overheat, surge power protection and output circuit break protection. It has a typical OTL output form, which can protect the speaker at the moment of power-on and power-off.
3. The information broadcasting speaker according to claim 2, characterized in that: The TDA2009 power amplifier integrated circuit has a maximum operating voltage of 28V, a typical operating voltage of 24V, a normal operating voltage of 8V~28V, an output power of dual 10W, a distortion rate of less than 0.5%, an input impedance of 100KΩ, an output impedance of less than 1Ω, and an operating temperature range of -40℃~+150℃.
4. The information broadcasting speaker according to claim 1, characterized in that: The metal rod (1) is rotatably connected to the transparent cover (2), and the transparent cover (2) is fixedly installed by the mounting screw (3) and the screw hole (7) on the insulating seat (4).