Collecting device for multimedia muting during vehicle station reporting and vehicle station reporting system

Abstract

The utility model provides a multimedia mute acquisition device for vehicle station reporting and a vehicle station reporting system, and belongs to the technical field of public transport multimedia. The collecting device comprises a collecting module and an adjusting module, the collecting module is used for being connected with the vehicle-mounted station broadcaster and a multimedia MCU module in the vehicle-mounted multimedia equipment, and the adjusting module is connected with the collecting module; the acquisition module is used for acquiring a station reporting enable signal sent by a vehicle-mounted station reporting device to a playing device connected with the vehicle-mounted station reporting device, and performing analog-to-digital conversion on the station reporting enable signal to obtain a first logic level, so that the multimedia MCU module sends the first logic level to the playing device after receiving the first logic level; generating a second logic level according to the first logic level and controlling a playing device connected with the second logic level to be mute through the second logic level; and the adjusting module is used for performing amplitude-adjustable pull-down on the level of the station reporting enable signal. According to the acquisition device, the compatibility of different vehicle-mounted station announcers of different vehicle types is improved while the station announcement multimedia muting is realized.

Description

Technical Field

[0001] The present application belongs to the technical field of public transportation multimedia, and specifically relates to a collection device for multimedia muting during vehicle station announcements and a vehicle station announcement system. Background Art

[0002] With the deepening of the demand for media and visualization of public transportation, in-vehicle multimedia devices are increasingly used in urban transportation operations. However, when multimedia programs are issued and advertising is operated, the basic needs of passengers for getting on and off stations are not fully considered, which leads to the fact that when the arrival information is played, the in-vehicle multimedia device is still playing the program, and the sound of the multimedia program covers the arrival information broadcast, causing passengers to miss the time to get off the bus. Through the analysis of the above phenomenon, it can be seen that because the in-vehicle multimedia is still in its infancy, the in-vehicle station announcer, GPS device and in-vehicle multimedia device are mostly independent individuals. As a result, after the GPS device identifies the specific location, it reports it to the in-vehicle station announcer, and the in-vehicle station announcer plays the arrival information through the speaker connected to it. However, since the in-vehicle multimedia device has no signal connection with the in-vehicle station announcer, the in-vehicle multimedia device is still playing the program when the in-vehicle station announcer announces the station. Therefore, in order to make the in-vehicle multimedia device silent when the vehicle announces the station, the vehicles that have been shipped have gradually established a communication connection between the in-vehicle multimedia device and the in-vehicle station announcer, and the vehicles that have been put into operation have also been gradually upgraded and renovated. However, there is a lot of noise interference in the vehicle environment, and the communication connection between the multimedia device and the vehicle-mounted station announcer still has problems such as large noise interference. In order to achieve compatible modification of different vehicle-mounted station announcers of different models, the communication connection solution between the vehicle-mounted multimedia device and the vehicle-mounted station announcer needs to be improved in terms of compatibility.

[0003] In summary, it is urgent to find a highly reliable and highly compatible solution for silencing the vehicle multimedia device when the vehicle announces the station. Utility Model Content

[0004] In view of this, the purpose of the embodiments of the present application is to provide a collection device for multimedia muting during vehicle station announcements and a vehicle station announcement system, so as to overcome one or more defects of the communication connection scheme between the existing vehicle-mounted station announcement device and the vehicle-mounted multimedia device mentioned in the background technology.

[0005] In order to achieve the above-mentioned purpose, a first aspect of an embodiment of the present application provides a collection device for multimedia muting when a vehicle announces a station, the collection device comprising a collection module and an adjustment module, the collection module is used to be connected to a multimedia MCU module in a vehicle-mounted station announcer and a vehicle-mounted multimedia device respectively, and the adjustment module is connected to the collection module;

[0006] The acquisition module is used to acquire a station announcement enable signal sent by the on-board station announcement device to a playback device connected to the on-board station announcement device, and obtain a first logic level after performing analog-to-digital conversion on the station announcement enable signal, so that after receiving the first logic level, the multimedia MCU module generates a second logic level according to the first logic level and controls the playback device connected to itself to mute through the second logic level;

[0007] The regulating module is used to pull down the level of the station announcement enabling signal with an adjustable amplitude.

[0008] Optionally, the regulating module includes a sliding rheostat, a first fixed end of the sliding rheostat is grounded, a second fixed end of the sliding rheostat is suspended, and the regulating end of the sliding rheostat is used to receive the station announcement enable signal from the acquisition module.

[0009] Optionally, the acquisition module includes a π-type low-pass filter circuit, an NPN tube, a first diode, a PNP tube, a voltage regulator diode and a voltage comparator. The first end of the π-type low-pass filter circuit is used to collect the station announcement enable signal sent by the on-board station announcer to the playback device connected to the on-board station announcer. The second end of the π-type low-pass filter circuit is connected to the base of the NPN tube, the emitter of the NPN tube is grounded, the collector of the NPN tube is connected to the first power supply end via a first pull-up resistor, the collector of the NPN tube is also connected to the cathode of the first diode, the anode of the first diode is connected to the base of the PNP tube, the collector of the PNP tube is grounded, and the The emitter is connected to the first power supply terminal via the second pull-up resistor, the emitter of the PNP tube is also connected to the negative electrode of the voltage zener diode and the positive input terminal of the voltage comparator respectively, the positive electrode of the voltage zener diode is grounded, the power supply terminal of the voltage comparator is connected to the second power supply terminal, the negative input terminal of the voltage comparator is connected to the second power supply terminal via the first voltage divider resistor, the negative input terminal of the voltage comparator is also grounded via the second voltage divider resistor, the output terminal of the voltage comparator is used to connect to the first logic level receiving terminal of the multimedia MCU module, the adjustment terminal of the sliding rheostat is connected to the second terminal of the π-type low-pass filter circuit, and the adjustment terminal of the sliding rheostat is also connected to the base of the NPN tube.

[0010] Optionally, the adjustment end of the sliding rheostat is connected to the second end of the π-type low-pass filter circuit via a first filter capacitor.

[0011] Optionally, the acquisition module further includes a second diode, the anode of the second diode is grounded, and the cathode of the second diode is connected to the base of the NPN tube.

[0012] Optionally, the acquisition module further includes a second filter capacitor, a first end of the second filter capacitor is connected to the base of the NPN tube, and a second end of the second filter capacitor is grounded.

[0013] Optionally, the acquisition module further includes a first polarity capacitor, a positive electrode of the first polarity capacitor is connected to the collector of the NPN tube, and a negative electrode of the first polarity capacitor is grounded.

[0014] Optionally, the acquisition module further includes a third filter capacitor, a first end of the third filter capacitor is connected to the power supply end of the voltage comparator, and a second end of the third filter capacitor is grounded.

[0015] Optionally, the π-type low-pass filter circuit includes a fifth resistor, a fourth filter capacitor and a fifth filter capacitor, the first end of the fifth resistor is used to collect the station announcement enable signal sent by the on-board station announcer to the playback device connected to the on-board station announcer, the first end of the fifth resistor is also grounded via the fourth filter capacitor, the second end of the fifth resistor is grounded via the fifth filter capacitor, and the second end of the fifth resistor is also connected to the base of the NPN tube.

[0016] The second aspect of the embodiment of the present application provides a vehicle station announcement system, the system comprising the collection device for multimedia muting when the vehicle announces a station as described in the first aspect of the embodiment of the present application, a GPS device, an on-board station announcement device connected to the GPS device and the collection module in the collection device respectively, a first playback device connected to the on-board station announcement device, a multimedia MCU module connected to the collection module in the collection device, a second playback device connected to the multimedia MCU module, and a communication device connected to the multimedia MCU module and used to receive multimedia information.

[0017] It can be known that when a playback device connected to the on-board station announcer needs to broadcast arrival information, the on-board station announcer usually gives the playback device a station announcement enable signal to trigger it to start broadcasting arrival information. The on-board multimedia equipment usually includes a multimedia MCU module for controlling the playback of multimedia information.

[0018] In the above technical scheme, communication between the mutually independent on-board multimedia device and the on-board station announcement device is established through the acquisition module. The acquisition module acquires the station announcement enable signal and obtains a first logic level after analog-to-digital conversion of the station announcement enable signal, and then transmits the first logic level to the multimedia MCU module in the on-board multimedia device. The multimedia MCU module generates a second logic level according to the first logic level, thereby controlling the muting of the playback device connected thereto through the second logic level, thereby making the multimedia device in a muted state when the vehicle announces the station, thereby improving the passengers' riding experience.

[0019] In addition, by adjusting the connection between the module and the acquisition module, after the acquisition circuit is installed, the level value of the station announcement enable signal is pulled down with an adjustable amplitude, thereby achieving compatibility with different vehicle models and different on-board station announcers, thereby improving the applicability of the acquisition device for multimedia muting during vehicle station announcements implemented in the embodiment of the present application.

[0020] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0022] Figure 1 A block diagram schematically shows a composition of a device for collecting multimedia mute when a vehicle announces a stop according to an embodiment of the present application;

[0023] Figure 2 The first part of the principle diagram of the acquisition module in a specific application example is schematically shown;

[0024] Figure 3 The second part of the principle diagram of the acquisition module in the specific application example is schematically shown;

[0025] Figure 4 The third part of the principle diagram of the acquisition module in the specific application example is schematically shown;

[0026] Figure 5 The block diagram schematically shows the composition of the vehicle station announcement system according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The specific implementation of the embodiment of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present application, and is not used to limit the embodiment of the present application.

[0028] Embodiment 1

[0029] For example, the vehicle mentioned in the present application may be a bus. However, it is also applicable to other public transportation vehicles that require multimedia muting during arrival announcements. Therefore, the application scenarios of the embodiments of the present application may be relatively wide.

[0030] See also Figure 1 The embodiment of the present application provides a collection device for multimedia muting when a vehicle announces a station, comprising a collection module and an adjustment module, wherein the collection module is used to be connected to a vehicle-mounted station announcer and a multimedia MCU module in a vehicle-mounted multimedia device, respectively, and the adjustment module is used to be connected to the collection module, wherein:

[0031] A collection module, used for collecting a station announcement enable signal sent by the on-board station announcement device to a playback device connected to the on-board station announcement device, and performing analog-to-digital conversion on the station announcement enable signal to obtain a first logic level, so that the multimedia MCU module generates a second logic level according to the first logic level and controls the playback device connected to the multimedia MCU module to mute through the second logic level;

[0032] The regulating module is used to pull down the level of the station announcement enabling signal collected by the collecting module with an adjustable amplitude.

[0033] It should be understood that the vehicle-mounted multimedia device usually includes an MCU module for controlling the playback of multimedia information, and the multimedia MCU module mentioned in the above embodiment is this MCU module. The multimedia MCU module usually transmits the multimedia information to be played to the playback device connected to it and sends a control signal to it, thereby triggering the start and stop of the playback device. In the above embodiment, the multimedia MCU module generates a second logic level according to the first logic level, which only involves level conversion. As for the mute function, it is a control function originally possessed by the multimedia MCU module in the vehicle-mounted multimedia device, that is: in a common embodiment, the multimedia MCU module of the vehicle-mounted multimedia device usually sends a logic level for controlling the playback volume of the playback device to the playback device connected to it. Therefore, the second logic level realizes the mute control process of the playback device connected to the multimedia MCU module, which is a known and public process. In summary, the above embodiment does not involve improvements to the method.

[0034] Exemplarily, in a specific embodiment, the adjustment module includes a sliding rheostat, a first fixed end of the sliding rheostat is grounded, a second fixed end of the sliding rheostat is suspended, and the adjustment end of the sliding rheostat is used to receive a station announcement enable signal from the acquisition module.

[0035] Because the voltage amplitudes of the station announcement enable signals set for different vehicle models and different on-board station announcers are often different, in order to achieve compatibility with different vehicle models and different on-board station announcers, in the above embodiments, after the acquisition module is installed, the voltage amplitude of the station announcement enable signal connected to the acquisition module is adjusted by a sliding rheostat to meet the subsequent unified analog-to-digital conversion of the station announcement enable signal, and the adjustment based on the sliding rheostat is also easy to implement and carry out. Therefore, the above embodiments enable the acquisition device for multimedia muting during vehicle station announcements implemented in the embodiments of the present application to have convenient adjustment characteristics and strong applicability.

[0036] Exemplarily, in a specific embodiment, the acquisition module includes a third voltage-dividing resistor and a first ADC converter, the first end of the third voltage-dividing resistor is used to collect the station announcement enable signal sent by the on-board station announcement device to the playback device connected to the on-board station announcement device, the second end of the third voltage-dividing resistor is connected to the first end of the first ADC converter, the second end of the first ADC converter is connected to the first logic level receiving end of the multimedia MCU module, and the first ADC converter is used to perform analog-to-digital conversion on the station announcement enable signal.

[0037] Embodiment 2

[0038] In Example 1, the communication connection between the multimedia MCU module and the on-board station announcement device is realized through the acquisition module, thereby realizing the mute setting of the multimedia device, and the applicability of the acquisition device is improved through the adjustment module. However, the acquisition module based on the third voltage-dividing resistor and the first ADC converter in Example 1 still has defects that need to be improved, mainly including: the first ADC converter usually adopts a commercially available integrated chip, which is relatively expensive; there is a lot of environmental interference noise in the vehicle environment, and the anti-interference performance of the acquisition module based on the third voltage-dividing resistor and the first ADC converter is poor, which leads to the need to improve the recognition accuracy of the on-board station announcement device.

[0039] Based on the above defects, embodiment 2 provides an improved acquisition module, which includes a π-type low-pass filter circuit, an NPN tube, a first diode, a PNP tube, a voltage regulator diode and a voltage comparator. Specifically, the first end of the π-type low-pass filter circuit is used to collect the station announcement enable signal sent by the on-board station announcer to the playback device connected to the on-board station announcer, the second end of the π-type low-pass filter circuit is connected to the base of the NPN tube, the emitter of the NPN tube is grounded, the collector of the NPN tube is connected to the first power supply terminal via a first pull-up resistor, the collector of the NPN tube is also connected to the negative electrode of the first diode, the positive electrode of the first diode is connected to the base of the PNP tube, the collector of the PNP tube is grounded, the emitter of the PNP tube is connected to the first power supply terminal via a second pull-up resistor, and the PNP tube The emitter is also connected to the negative electrode of the voltage zener diode and the positive input terminal of the voltage comparator respectively, the positive electrode of the voltage zener diode is grounded, the power supply terminal of the voltage comparator is connected to the second power supply terminal, the negative input terminal of the voltage comparator is connected to the second power supply terminal via the first voltage-dividing resistor, the negative input terminal of the voltage comparator is also grounded via the second voltage-dividing resistor, the ground terminal of the voltage comparator is grounded, the output terminal of the voltage comparator is used to be connected to the first logic level receiving terminal of the multimedia MCU module, the adjustment terminal of the sliding rheostat is connected to the second terminal of the π-type low-pass filter circuit and is also connected to the base of the NPN tube.

[0040] The above-mentioned improved acquisition module performs low-pass filtering through a π-type low-pass filter circuit, and combines a combination of an NPN tube, a first diode, a voltage regulator diode and a PNP tube for level conversion, so that the connection between the acquisition module and the on-board station announcer, and the connection between the negative electrode of the voltage regulator diode and the positive input terminal of the voltage comparator have strong anti-interference performance, so that the first logic level finally output by the voltage comparator is more accurate, and the acquisition accuracy of the acquisition module is improved. At the same time, the above-mentioned improved acquisition module and the adjustment module based on the sliding rheostat are both built by discrete components, which achieves low cost compared to the use of integrated chips, thereby reducing the cost of modifying vehicles that have been put into operation and the production cost of vehicles in production. At the same time, it is known that various on-board station announcers and multimedia MCU modules have multiple reserved external communication interfaces, and the acquisition module is easy to connect with the on-board station announcer and the multimedia MCU module. It can be seen that in terms of the modification of vehicles that have been put into operation or manufactured vehicles, it is convenient while achieving low cost.

[0041] For example, in a specific embodiment, the adjustment end of the sliding rheostat is connected to the second end of the π-type low-pass filter circuit via the first filter capacitor. As in the above embodiment, further filtering is performed by the first filter capacitor arranged after the π-type low-pass filter circuit, thereby improving the acquisition accuracy of the acquisition module.

[0042] For example, in a specific embodiment, the acquisition module further includes a second diode, the anode of the second diode is grounded, and the cathode of the second diode is connected to the base of the NPN tube. As in the above embodiment, the second diode is used to cope with the surge introduced by the station announcement enable signal and the surge introduced by the first power supply terminal, thereby improving the anti-interference performance of the acquisition module, and further improving the acquisition accuracy of the acquisition module.

[0043] For example, in a specific embodiment, the acquisition module further includes a second filter capacitor, a first end of the second filter capacitor is connected to the base of the NPN tube, and a second end of the second filter capacitor is grounded. As in the above embodiment, the high-frequency interference introduced by the station announcement enable signal and the high-frequency interference introduced by the first power supply terminal are filtered out by the second filter capacitor, thereby improving the anti-interference performance of the acquisition module, and further improving the acquisition accuracy of the acquisition module.

[0044] For example, in a specific embodiment, the acquisition module further includes a first polarity capacitor, the positive electrode of the first polarity capacitor is connected to the collector of the NPN tube, and the negative electrode of the first polarity capacitor is grounded. As in the above embodiment, the high-frequency interference introduced by the first power supply end is filtered out by the first polarity capacitor, thereby improving the anti-interference performance of the acquisition module, and further improving the acquisition accuracy of the acquisition module.

[0045] For example, in a specific embodiment, the acquisition module further includes a third filter capacitor, a first end of the third filter capacitor is connected to the power supply end of the voltage comparator, and a second end of the third filter capacitor is grounded. As in the above embodiment, the high-frequency interference introduced by the second power supply end is filtered out by the third filter capacitor, thereby improving the anti-interference performance of the acquisition module, and further improving the acquisition accuracy of the acquisition module.

[0046] Exemplarily, in a specific embodiment, the π-type low-pass filter circuit includes a fifth resistor, a fourth filter capacitor and a fifth filter capacitor. The first end of the fifth resistor is used to collect the station announcement enable signal sent by the on-board station announcement device to the playback device connected to the on-board station announcement device. The first end of the fifth resistor is also grounded via the fourth filter capacitor, the second end of the fifth resistor is grounded via the fifth filter capacitor, and the second end of the fifth resistor is also connected to the base of the NPN tube.

[0047] Figures 2 to 4 The following is a schematic diagram of the acquisition module in a specific application example. Figures 2 to 4In the embodiment, a first end of the fifth resistor R28 is connected to an external communication port of the on-board station announcer, and a station announcement enable signal sent by the on-board station announcer to the playback device connected thereto is accessed through the port. The first end of the fifth resistor R28 is also connected to the first end of the fourth filter capacitor C79, and the second end of the fourth filter capacitor C79 is grounded. The second end of the fifth resistor R28 is respectively connected to the first end of the fifth filter capacitor C66 and the first end of the first filter capacitor C60, and the second end of the fifth filter capacitor C66 is grounded. The second end of the first filter capacitor C60 is respectively connected to the adjustment end of the sliding rheostat R184 and the base of the NPN tube Q4, the first fixed end of the sliding rheostat R184 is grounded, and the second fixed end of the sliding rheostat is suspended. The cathode of the second diode D12 is respectively connected to the base of the NPN tube Q4 and the first end of the sixth resistor R18, the anode of the second diode D12 is grounded, and the second end of the sixth resistor R18 is connected to the first power supply end. Here, the sixth resistor R18 can be based on a specific The first power supply terminal outputs a 12V DC voltage, the base of the NPN tube Q4 is also grounded via the second filter capacitor C69, the emitter of the NPN tube Q4 is grounded, the collector of the NPN tube Q4 is connected to the first power supply terminal via the first pull-up resistor R29, the collector of the NPN tube Q4 is also connected to the cathode of the first diode D13 and the anode of the first polarity capacitor C64 respectively, the cathode of the first polarity capacitor C64 is grounded, the anode of the first diode D13 is respectively connected to the first end of the seventh resistor R34 and the base of the PNP tube Q5, the second end of the seventh resistor R34 is connected to the first power supply terminal, here, the seventh resistor R34 can be empty or a resistor of a certain resistance value can be attached according to the specific situation, the collector of the PNP tube Q5 is grounded, the emitter of the PNP tube Q5 is connected to the first power supply terminal via the second pull-up resistor R30, and the emitter of the PNP tube Q5 is respectively connected to the cathode of the voltage stabilizing diode ZD3 and the positive input terminal of the voltage comparator U9 after passing through the eighth resistor R31 ( Figure 3 to Figure 4 The positive electrode of the voltage comparator U9 is connected to the DET_ANALOG terminal shown in the figure, the positive electrode of the voltage comparator ZD3 is grounded, the negative electrode of the voltage comparator ZD3 is also connected to the first end of the ninth resistor R32, the second end of the ninth resistor R32 is grounded, the positive input terminal of the voltage comparator U9 is connected to the first end of the tenth resistor R41, the second end of the tenth resistor R41 is grounded, the negative input terminal of the voltage comparator U9 is grounded via the second voltage-dividing resistor R39 and is also connected to the second power supply terminal via the first voltage-dividing resistor R38, and the second power supply terminal outputs a 5V DC voltage. Here, the negative input terminal level of the voltage comparator U9 is 1.72V, the VCC terminal of the voltage comparator U9 is connected to the second power supply terminal, and the second power supply terminal is also grounded via the third filter capacitor C65. In order to improve the load capacity of the output terminal of the voltage comparator U9, the output terminal of the voltage comparator U9 ( Figure 4The DET_OUT terminal shown in FIG) is also connected to the second power supply terminal via the third pull-up resistor R40, and the output terminal of the voltage comparator U9 is used to connect to the first logic level receiving terminal of the multimedia MCU module. In the above circuit, when the on-board station announcer announces a station, the level output by the DET_ANALOG terminal is 1.0V, when the on-board station announcer does not announce a station, the level output by the DET_ANALOG terminal is 3.3V, when the on-board station announcer announces a station, the first logic level output by the DET_OUT terminal is 0, and when the on-board station announcer does not announce a station, the first logic level output by the DET_OUT terminal is 1.

[0048] Embodiment 3

[0049] See also Figure 5 , the embodiment of the present application provides a vehicle station announcement system, the system includes the collection device for multimedia muting when the vehicle station is announced provided in the first or second embodiment, a GPS device, a vehicle-mounted station announcement device connected to the GPS device and the collection module in the collection device for multimedia muting when the vehicle station is announced, respectively, a first playback device connected to the vehicle-mounted station announcement device, a multimedia MCU module connected to the collection module in the collection device for multimedia muting when the vehicle station is announced, a second playback device connected to the multimedia MCU module, and a communication device connected to the multimedia MCU module and used to receive multimedia information. Generally, the communication device includes a wireless communication device for receiving advertising information and a wireless communication device for receiving television signals, etc.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A device for collecting multimedia mute when a vehicle announces a stop, characterized in that: The acquisition device includes an acquisition module and an adjustment module, wherein the acquisition module is used to be connected to the vehicle-mounted station announcer and the multimedia MCU module in the vehicle-mounted multimedia device respectively, and the adjustment module is connected to the acquisition module; The acquisition module is used to acquire a station announcement enable signal sent by the on-board station announcement device to a playback device connected to the on-board station announcement device, and obtain a first logic level after performing analog-to-digital conversion on the station announcement enable signal, so that after receiving the first logic level, the multimedia MCU module generates a second logic level according to the first logic level and controls the playback device connected to itself to mute through the second logic level; The regulating module is used to pull down the level of the station announcement enabling signal with an adjustable amplitude.

2. The device for collecting multimedia mute during vehicle station announcement according to claim 1, characterized in that: The regulating module comprises a sliding rheostat, a first fixed end of the sliding rheostat is grounded, a second fixed end of the sliding rheostat is suspended, and the regulating end of the sliding rheostat is used to receive the station announcement enable signal from the acquisition module.

3. The device for collecting multimedia mute during vehicle station announcement according to claim 2, characterized in that: The acquisition module includes a π-type low-pass filter circuit, an NPN tube, a first diode, a PNP tube, a voltage regulator diode and a voltage comparator. The first end of the π-type low-pass filter circuit is used to collect the station announcement enable signal sent by the on-board station announcer to the playback device connected to the on-board station announcer. The second end of the π-type low-pass filter circuit is connected to the base of the NPN tube, the emitter of the NPN tube is grounded, the collector of the NPN tube is connected to the first power supply terminal via a first pull-up resistor, the collector of the NPN tube is also connected to the cathode of the first diode, the anode of the first diode is connected to the base of the PNP tube, the collector of the PNP tube is grounded, and the emitter of the PNP tube is grounded. The emitter of the PNP tube is also connected to the negative electrode of the voltage zener diode and the positive input terminal of the voltage comparator respectively, the positive electrode of the voltage zener diode is grounded, the power supply terminal of the voltage comparator is connected to the second power supply terminal, the negative input terminal of the voltage comparator is connected to the second power supply terminal via the first voltage divider resistor, the negative input terminal of the voltage comparator is also grounded via the second voltage divider resistor, the output terminal of the voltage comparator is used to be connected to the first logic level receiving terminal of the multimedia MCU module, the adjustment terminal of the sliding rheostat is connected to the second terminal of the π-type low-pass filter circuit, and the adjustment terminal of the sliding rheostat is also connected to the base of the NPN tube.

4. The device for collecting multimedia mute during vehicle station announcement according to claim 3, characterized in that: The adjusting end of the sliding rheostat is connected to the second end of the π-type low-pass filter circuit via the first filter capacitor.

5. The device for collecting multimedia mute during vehicle station announcement according to claim 3, characterized in that: The acquisition module also includes a second diode, the anode of the second diode is grounded, and the cathode of the second diode is connected to the base of the NPN tube.

6. The device for collecting multimedia mute during vehicle station announcement according to claim 3, characterized in that: The acquisition module further includes a second filter capacitor, a first end of the second filter capacitor is connected to the base of the NPN tube, and a second end of the second filter capacitor is grounded.

7. The device for collecting multimedia mute during vehicle station announcement according to claim 3, characterized in that: The acquisition module also includes a first polarity capacitor, the positive electrode of the first polarity capacitor is connected to the collector of the NPN tube, and the negative electrode of the first polarity capacitor is grounded.

8. The device for collecting multimedia mute during vehicle station announcement according to claim 3, characterized in that: The acquisition module further includes a third filter capacitor, a first end of the third filter capacitor is connected to the power supply end of the voltage comparator, and a second end of the third filter capacitor is grounded.

9. The device for collecting multimedia mute during vehicle station announcement according to claim 3, characterized in that: The π-type low-pass filter circuit includes a fifth resistor, a fourth filter capacitor and a fifth filter capacitor. The first end of the fifth resistor is used to collect the station announcement enable signal sent by the on-board station announcer to the playback device connected to the on-board station announcer. The first end of the fifth resistor is also grounded via the fourth filter capacitor, the second end of the fifth resistor is grounded via the fifth filter capacitor, and the second end of the fifth resistor is also connected to the base of the NPN tube.

10. A vehicle station announcement system, characterized in that: The system comprises a collection device for silencing multimedia when a vehicle announces a station as described in any one of claims 1 to 9, a GPS device, an on-board station announcer connected to the GPS device and a collection module in the collection device respectively, a first playback device connected to the on-board station announcer, a multimedia MCU module connected to the collection module in the collection device, a second playback device connected to the multimedia MCU module, and a communication device connected to the multimedia MCU module and used to receive multimedia information.

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