CN110958029B - Switching method and device of vehicle-mounted radio, storage medium and equipment - Google Patents
Switching method and device of vehicle-mounted radio, storage medium and equipment Download PDFInfo
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- CN110958029B CN110958029B CN201911210438.1A CN201911210438A CN110958029B CN 110958029 B CN110958029 B CN 110958029B CN 201911210438 A CN201911210438 A CN 201911210438A CN 110958029 B CN110958029 B CN 110958029B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/08—Constructional details, e.g. cabinet
- H04B1/082—Constructional details, e.g. cabinet to be used in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/10—Arrangements for replacing or switching information during the broadcast or the distribution
- H04H20/106—Receiver-side switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
- H04H20/62—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast for transportation systems, e.g. in vehicles
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Abstract
The invention discloses a switching method, a device, a storage medium and equipment of a vehicle-mounted radio, wherein the method comprises the following steps: acquiring the lock sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting a current search standard according to the lock sensitivity and the signal-to-noise ratio; searching the current signal intensity of the radio station according to the current search standard; acquiring the strength of a calibration signal of a target vehicle where the vehicle-mounted radio is located; judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity; and switching the search mode of the vehicle-mounted radio to the target mode. According to the invention, the target mode which is beneficial to the receiving effect of the radio station is selected according to the current signal intensity of the radio station and the calibrated signal intensity of the target vehicle, so that the condition that the receiving effect is poor due to the fact that the receiving signal is influenced by external factors such as weather or building shielding is avoided, the stability of the receiving effect of the received radio station is ensured, and the user experience is improved.
Description
Technical Field
The invention relates to the technical field of vehicle-mounted equipment, in particular to a switching method and device of a vehicle-mounted radio, a storage medium and equipment.
Background
The radio signals are analog signals and are greatly influenced by external factors such as weather, building shielding and the like, and the receiving system is complex in structure, so that users often complain about the radio effect, and the problems comprise that the number of radio stations is small, the radio stations are not clear, the radio effect is not good, not stable, the number of unclear radio stations is large and the like. When the vehicle travels to a place where the signals are weak or the interference is obvious under a tunnel or a viaduct, or a place where the signals are poor in suburbs or mountainous areas, the effect of the radio station is also obviously poor, and the experience of the user is very poor. How to solve the problem that the effect of the radio station is poor due to the change of external factors is a technical problem to be solved urgently.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a switching method, a switching device, a storage medium and equipment of a vehicle-mounted radio, and aims to solve the technical problem that the radio station effect is poor due to external factor change in the prior art.
In order to achieve the above object, the present invention provides a switching method of a car radio, which comprises the following steps:
acquiring the lock sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting a current search standard according to the lock sensitivity and the signal-to-noise ratio;
searching the current signal intensity of the radio station according to the current search standard;
acquiring the strength of a calibration signal of a target vehicle where the vehicle-mounted radio is located;
judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity;
and switching the search mode of the vehicle-mounted radio to the target mode.
Preferably, the determining the target mode of the car radio according to the current signal strength and the calibrated signal strength specifically includes:
calculating the number of the radio stations of which the current signal strength is greater than the calibrated signal strength;
judging whether the number of the radio stations exceeds a preset number or not;
and when the number of the radio stations exceeds the preset number, taking a near range mode as a target mode of the vehicle-mounted radio.
Preferably, after determining whether the number of radio stations exceeds a preset number, the method for switching the car radio further includes:
and when the number of the radio stations is less than or equal to the preset number, taking a remote mode as a target mode of the vehicle-mounted radio.
Preferably, after the remote mode is used as the target mode of the car radio when the number of the radio stations is less than or equal to the preset number, the method for switching the car radio further includes:
broadcasting the target mode in a voice mode;
receiving a search instruction of a user;
setting a low-level search criterion in response to the search instruction;
searching for a first signal strength of a station based on the low level search criteria;
judging a new target mode of the vehicle-mounted radio according to the first signal intensity and the calibration signal intensity;
switching the search mode of the vehicle radio to the new target mode.
Preferably, the setting of the low-level search criteria in response to the search instruction specifically includes:
responding to the search instruction, and acquiring the channel locking sensitivity, the noise value and the multipath elimination parameter of the vehicle-mounted radio;
and setting a low-level search standard according to the channel locking sensitivity, the noise value and the multipath elimination parameter.
Preferably, after the switching the search mode of the car radio to the target mode, the switching method of the car radio further includes:
detecting a second signal intensity of a current broadcasting station of the vehicle-mounted radio;
judging whether the second signal intensity is lower than a preset intensity threshold value or not;
and when the second signal intensity is lower than the preset intensity threshold value, carrying out voice prompt.
Preferably, after the voice prompt is performed when the second signal strength is lower than the preset strength threshold, the method for switching the car radio further includes:
receiving a switching mode instruction input by a user;
and switching the search mode according to the switching mode instruction.
In addition, in order to achieve the above object, the present invention further proposes a switching device of a car radio, which includes a memory, a processor, and a switching program of a car radio stored on the memory and operable on the processor, the switching program of a car radio being configured to implement the steps of the switching method of a car radio as described above.
In addition, in order to achieve the above object, the present invention further provides a storage medium, wherein a switching program of the car radio is stored on the storage medium, and the switching program of the car radio realizes the steps of the switching method of the car radio when being executed by the processor.
In order to achieve the above object, the present invention further provides a switching device of a car radio, including:
the setting module is used for acquiring the locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio and setting the current search standard according to the locking sensitivity and the signal-to-noise ratio;
the searching module is used for searching the current signal intensity of the radio station according to the current searching standard;
the acquisition module is used for acquiring the calibration signal intensity of a target vehicle where the vehicle-mounted radio is located;
the judging module is used for judging the target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity;
and the switching module is used for switching the search mode of the vehicle-mounted radio to the target mode.
According to the invention, the locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio are obtained, the current search standard is set according to the locking sensitivity and the signal-to-noise ratio, the current signal intensity of the radio stations is searched according to the current search standard, and the playing effect of each radio station can be mastered in real time by searching the signal intensity of the radio stations; the method comprises the steps of obtaining the calibrated signal intensity of a target vehicle where the vehicle-mounted radio is located, judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity, and selecting the target mode which is favorable for the receiving effect of a radio station according to the current signal intensity of the radio station and the calibrated signal intensity of the target vehicle, so that the condition that the receiving effect is poor due to the fact that a received signal is influenced by external factors such as weather or building shielding is avoided; and switching the search mode of the vehicle-mounted radio to the target mode, ensuring the stability of the radio effect of the listened radio station and improving the user experience.
Drawings
FIG. 1 is a schematic diagram of a switching device of a car radio in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating a first embodiment of a switching method of a car radio according to the present invention;
FIG. 3 is a flowchart illustrating a second embodiment of a switching method for a car radio according to the present invention;
FIG. 4 is a flowchart illustrating a switching method of a car radio according to a third embodiment of the present invention;
FIG. 5 is a block diagram of a switching device of a car radio according to a first embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a car radio switching device in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the switching device of the car radio may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), and the optional user interface 1003 may further include a standard wired interface and a wireless interface, and the wired interface for the user interface 1003 may be a USB interface in the present invention. The network interface 1004 may optionally include a standard wired interface, a WIreless interface (e.g., a WIreless-FIdelity (WI-FI) interface). The Memory 1005 may be a Random Access Memory (RAM) Memory or a Non-volatile Memory (NVM), such as a disk Memory. The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the configuration shown in fig. 1 does not constitute a limitation of the switching device of a car radio and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a switching program of a car radio.
In the switching device of the car radio shown in fig. 1, the network interface 1004 is mainly used for connecting a background server and performing data communication with the background server; the user interface 1003 is mainly used for connecting user equipment; the switching device of the car radio calls a switching program of the car radio stored in the memory 1005 through the processor 1001 and executes the switching method of the car radio provided by the embodiment of the invention.
The switching apparatus of the car radio calls a switching program of the car radio stored in the memory 1005 by the processor 1001 and performs the following operations:
acquiring the lock sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting a current search standard according to the lock sensitivity and the signal-to-noise ratio;
searching the current signal intensity of the radio station according to the current search standard;
acquiring the strength of a calibration signal of a target vehicle where the vehicle-mounted radio is located;
judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity;
and switching the search mode of the vehicle-mounted radio to the target mode.
Further, the switching apparatus of the car radio calls the switching program of the car radio stored in the memory 1005 by the processor 1001, and also performs the following operations:
calculating the number of the radio stations of which the current signal strength is greater than the calibrated signal strength;
judging whether the number of the radio stations exceeds a preset number or not;
and when the number of the radio stations exceeds the preset number, taking a near range mode as a target mode of the vehicle-mounted radio.
Further, the switching apparatus of the car radio calls the switching program of the car radio stored in the memory 1005 by the processor 1001, and also performs the following operations:
and when the number of the radio stations is less than or equal to the preset number, taking a remote mode as a target mode of the vehicle-mounted radio.
Further, the switching apparatus of the car radio calls the switching program of the car radio stored in the memory 1005 by the processor 1001, and also performs the following operations:
broadcasting the target mode in a voice mode;
receiving a search instruction of a user;
setting a low-level search criterion in response to the search instruction;
searching for a first signal strength of a station based on the low level search criteria;
judging a new target mode of the vehicle-mounted radio according to the first signal intensity and the calibration signal intensity;
switching the search mode of the vehicle radio to the new target mode.
Further, the switching apparatus of the car radio calls the switching program of the car radio stored in the memory 1005 by the processor 1001, and also performs the following operations:
responding to the search instruction, and acquiring the channel locking sensitivity, the noise value and the multipath elimination parameter of the vehicle-mounted radio;
and setting a low-level search standard according to the channel locking sensitivity, the noise value and the multipath elimination parameter.
Further, the switching apparatus of the car radio calls the switching program of the car radio stored in the memory 1005 by the processor 1001, and also performs the following operations:
detecting a second signal intensity of a current broadcasting station of the vehicle-mounted radio;
judging whether the second signal intensity is lower than a preset intensity threshold value or not;
and when the second signal intensity is lower than the preset intensity threshold value, carrying out voice prompt.
Further, the switching apparatus of the car radio calls the switching program of the car radio stored in the memory 1005 by the processor 1001, and also performs the following operations:
receiving a switching mode instruction input by a user;
and switching the search mode according to the switching mode instruction.
In the embodiment, the current search standard is set according to the station locking sensitivity and the signal-to-noise ratio by acquiring the station locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, the current signal intensity of the radio station is searched according to the current search standard, and the playing effect of each radio station can be mastered in real time by searching the signal intensity of the radio station; the method comprises the steps of obtaining the calibrated signal intensity of a target vehicle where the vehicle-mounted radio is located, judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity, and selecting the target mode which is favorable for the receiving effect of a radio station according to the current signal intensity of the radio station and the calibrated signal intensity of the target vehicle, so that the condition that the receiving effect is poor due to the fact that a received signal is influenced by external factors such as weather or building shielding is avoided; and switching the search mode of the vehicle-mounted radio to the target mode, ensuring the stability of the radio effect of the listened radio station and improving the user experience.
Based on the hardware structure, the embodiment of the switching method of the vehicle-mounted radio is provided.
Referring to fig. 2, fig. 2 is a flowchart illustrating a first embodiment of a switching method of a car radio according to the present invention.
In a first embodiment, the switching method of the car radio comprises the following steps:
step S10: the method comprises the steps of obtaining the locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting a current search standard according to the locking sensitivity and the signal-to-noise ratio.
It should be understood that the execution main body of this embodiment is a switching device of the car radio, and the switching device of the car radio may be the car radio, or may be a car device including the car radio, which is not limited in this embodiment. The station locking sensitivity is that the signal is higher than the value, the station can be received, and otherwise, the station cannot be received. The method for measuring the sensitivity of the locking table comprises the following steps: measuring at low, middle and high end measuring frequency points of the receiver respectively, adjusting a volume controller until the output reaches 0.5W of standard reference output power, turning off the modulation of the high-frequency signal generator, adjusting the level of the high-frequency signal generator to enable the signal-to-noise ratio of the output of the receiver between the modulation of the high-frequency signal generator and the turning-off to reach 50dB, and recording the level of the high-frequency signal at the moment as the sensitivity of the locking stage. The signal-to-noise ratio refers to the ratio of signal to noise in the car radio. In order to search a certain number of radio stations, the current search criteria are set according to the station locking sensitivity and the signal-to-noise ratio, and the current search criteria can be set according to experience, and different station locking sensitivities and different signal-to-noise ratios correspond to different search criteria, so that a sufficient number of radio stations can be searched.
Step S20: and searching the current signal intensity of the radio station according to the current search standard.
It can be understood that the radio reception functions of the commonly used car radio mainly include Frequency Modulation (FM) and Amplitude Modulation (AM) 2-band listening. FM, the frequency of the carrier wave is modulated according to the modulation mode of the modulation signal, the frequency range is 76-108MHz, in our country, 87.5-108 MHz, the wavelength is short, the signal quality is high, the transmission cost is low, the transmission power is small, the coverage area is small, and the influence of geographical factors is large, and the FM is generally used as the first choice of urban broadcasting, such as local music broadcasting stations, traffic broadcasting stations, and the like. The AM and the carrier wave have unchanged frequency, so that the amplitude of the carrier wave is in a modulation mode of modulating signal change, the frequency range is 520-1710 kHz, the signal quality is stable, the transmission cost is high, the transmission power is high, the coverage range is wide, but the influence of weather conditions is large, and the AM and the carrier wave are generally used as the first choice of long-distance transmission, such as China international broadcasting stations, central people broadcasting stations and the like. Searching the corresponding search standard according to the station locking sensitivity and the signal-to-noise ratio, and searching the current signal intensity of all radio stations according to the current search standard. The station includes the frequency modulation station and the amplitude modulation station.
Step S30: and acquiring the calibration signal intensity of the target vehicle where the vehicle-mounted radio is located.
It should be noted that the calibrated signal strength of the target vehicle where the car radio is located is the signal strength detected by the detection at the time of factory shipment, and the calibrated signal strength refers to the strength of the signal received by the car radio under normal conditions. For example, in the short range mode, the nominal signal strength of a receiving FM station is 65 dB.
Step S40: and judging the target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity.
In a particular implementation, the target mode includes a long range mode and a short range mode. In the remote mode, the sensitivity is good, the selectivity is good, the passband is narrow, a weak station can be received, the noise is large, and the tone quality is poor; the remote gain is high, short waves are mainly listened, and the method is suitable for occasions outside urban areas and with low noise. In the short-range mode, the sensitivity is generally poor, the selectivity is poor and the passband is wide; the method is suitable for the radio station with small gain, strong signal, low noise and good tone quality. And judging whether the number of the radio stations with the current signal strength larger than the calibrated signal strength meets a preset number or not according to the current signal strength and the calibrated signal strength, so as to select the corresponding target mode. If the number of the radio stations with the current signal strength larger than the calibrated signal strength meets the preset number, the signal strength of the radio stations which can be searched currently is better, the short-range mode can be selected for listening to the radio stations, and a better listening effect can be achieved.
Step S50: and switching the search mode of the vehicle-mounted radio to the target mode.
It should be understood that, in the target mode, the searched radio station has a better signal strength, and the short-range mode can be selected for listening to the radio station, and then the search mode of the car radio is switched to the target mode, so that a better listening effect can be achieved, and the user experience is improved.
In the embodiment, the current search standard is set according to the station locking sensitivity and the signal-to-noise ratio by acquiring the station locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, the current signal intensity of the radio station is searched according to the current search standard, and the playing effect of each radio station can be mastered in real time by searching the signal intensity of the radio station; the method comprises the steps of obtaining the calibrated signal intensity of a target vehicle where the vehicle-mounted radio is located, judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity, and selecting the target mode which is favorable for the receiving effect of a radio station according to the current signal intensity of the radio station and the calibrated signal intensity of the target vehicle, so that the condition that the receiving effect is poor due to the fact that a received signal is influenced by external factors such as weather or building shielding is avoided; and switching the search mode of the vehicle-mounted radio to the target mode, ensuring the stability of the radio effect of the listened radio station and improving the user experience.
Referring to fig. 3, fig. 3 is a flowchart illustrating a second embodiment of a switching method for a car radio according to the present invention, and the second embodiment of the switching method for a car radio according to the present invention is proposed based on the first embodiment illustrated in fig. 2.
In the second embodiment, the step S40 includes:
step S401: and calculating the number of the radio stations of which the current signal strength is greater than the calibrated signal strength.
It should be understood that the nominal signal strength for a receiving FM station, for example, is 65 dB. The current signal strengths of all stations searched are 85dB, 82dB, 80dB, 75dB, 72dB, 70dB, 68dB, 66dB, 89dB, 85dB, 66dB, 55dB, 60dB and 45dB, respectively. And calculating the number of the radio stations of which the current signal intensity is greater than the calibrated signal intensity to be 11.
Step S402: and judging whether the number of the radio stations exceeds a preset number.
It is understood that the preset number is usually set according to an empirical value, for example, the preset number is set to 10. And judging whether the number of the radio stations exceeds the preset number, namely judging whether 11 radio stations exceed 10 radio stations.
Step S403: and when the number of the radio stations exceeds the preset number, taking a near range mode as a target mode of the vehicle-mounted radio.
It should be noted that 11 radio stations exceed 10 radio stations, and when the number of radio stations exceeds the preset number, it indicates that the signal strength of the radio stations that can be currently searched is good, the short range mode may be selected for listening to the radio stations, and the short range mode may be used as the target mode of the car radio if the short range mode has a good listening effect.
In this embodiment, after the step S402, the method further includes:
step S404: and when the number of the radio stations is less than or equal to the preset number, taking a remote mode as a target mode of the vehicle-mounted radio.
In a specific implementation, when the number of the radio stations is less than or equal to the preset number, it is indicated that the signal strength of the radio stations which can be searched at present is not good, the remote mode can receive weak radio stations, the remote mode can be selected to listen to the radio stations, and the remote mode can be used as the target mode of the car radio if the remote mode has a good listening effect.
Further, in this embodiment, after the step S404, the method further includes:
broadcasting the target mode in a voice mode;
receiving a search instruction of a user;
setting a low-level search criterion in response to the search instruction;
searching for a first signal strength of a station based on the low level search criteria;
judging a new target mode of the vehicle-mounted radio according to the first signal intensity and the calibration signal intensity;
switching the search mode of the vehicle radio to the new target mode.
It should be understood that when switching to the target mode, the target mode may be broadcasted in a voice form, or may be displayed in a display interface for a short time, such as 5s, so that the user knows the current mode. When a user listens to a current radio station, if the user feels that a signal cannot meet the requirement of the user, the search instruction can be input through a display interface of switching equipment of the vehicle-mounted radio, and the search instruction in a voice form can also be output through a voice interaction form, for example, the search instruction is as follows: if the signal is not good, please search again.
It can be understood that when the number of the radio stations is less than or equal to the preset number, a remote mode is used as a target mode of the vehicle-mounted radio, a weak station can be received in the remote mode, but the noise is high and the sound quality is poor, if the user needs to search again, in order to search for a sufficient number of radio stations, a search criterion can be reset, the low-level search criterion reduces the search condition, the low-level search criterion can be set by acquiring parameters such as station locking sensitivity, a noise value and multipath elimination, and the like, and the search for the radio stations can be performed according to the low-level search criterion, so that some radio stations with interfering signals can be searched, and more radio stations can be filtered to meet the requirements of quantity and quality. In this embodiment, the setting of the low-level search criteria in response to the search instruction includes: responding to the search instruction, and acquiring the channel locking sensitivity, the noise value and the multipath elimination parameter of the vehicle-mounted radio; and setting a low-level search standard according to the channel locking sensitivity, the noise value and the multipath elimination parameter.
It should be noted that, the number of the first radio stations of the radio stations whose first signal strength is greater than the calibrated signal strength is calculated; judging whether the number of the first radio stations exceeds the preset number or not; and when the number of the first radio stations exceeds the preset number, taking a near range mode as a new target mode of the vehicle-mounted radio, and switching the search mode of the vehicle-mounted radio to the new target mode.
In this embodiment, the number of radio stations of which the current signal strength is greater than the calibrated signal strength is calculated, whether the number of radio stations exceeds a preset number is determined, when the number of radio stations exceeds the preset number, a near-range mode is used as a target mode of the vehicle-mounted radio, when the number of radio stations is less than or equal to the preset number, a remote mode is used as the target mode of the vehicle-mounted radio, and the near-remote mode is automatically switched and adjusted according to the actual signal strength, so that the effect of searching for more radio stations is achieved, and the playing effect of the played radio stations is ensured.
Referring to fig. 4, fig. 4 is a flowchart illustrating a switching method of a car radio according to a third embodiment of the present invention, and the third embodiment of the switching method of the car radio according to the present invention is proposed based on the first embodiment or the second embodiment. This embodiment is explained based on the first embodiment.
In the third embodiment, after the step S50, the method further includes:
step S60: and detecting the second signal intensity of the current broadcasting station of the vehicle-mounted radio.
It should be understood that, in the driving process of the target vehicle, the external environment may change at any time, the second signal intensity of the current broadcasting station of the car radio may need to be detected in real time, whether the second signal intensity can achieve a better listening effect is judged, if the second signal intensity cannot achieve a better listening effect, re-search of the broadcasting station is required, and thus, whether the search mode needs to be switched again is judged.
Step S70: and judging whether the second signal intensity is lower than a preset intensity threshold value or not.
It can be understood that the preset intensity threshold is set according to a better radio station effect that a user can hear, and may be an empirical value, or the calibrated signal intensity may be directly used as the preset intensity threshold. And comparing whether the second signal strength is lower than the preset strength threshold value or not, if the second signal strength is lower than the preset strength threshold value, indicating that the second signal can not achieve a better listening effect slightly, the radio station needs to be searched again, and if the second signal strength is higher than or equal to the preset strength threshold value, indicating that the second signal can achieve a better listening effect slightly, and the radio station does not need to be searched again.
Step S80: and when the second signal intensity is lower than the preset intensity threshold value, carrying out voice prompt.
It should be noted that when the second signal strength is lower than the preset strength threshold, which indicates that the second signal cannot achieve a good listening effect slightly, a radio station needs to be searched again to perform voice prompt, for example: if the current signal is poor, the station is searched again.
In this embodiment, after the step S80, the method further includes:
receiving a switching mode instruction input by a user;
and switching the search mode according to the switching mode instruction.
Specifically, when hearing the voice prompt, the user may feed back the switching mode instruction, where the switching mode instruction may be the switching mode instruction input through a display interface of the switching device of the car radio. The switching equipment of the vehicle-mounted radio extracts a specified mode from the switching mode instruction, switches the search mode according to the switching mode instruction, and switches the search mode to the specified mode.
In this embodiment, detect the second signal strength of the current broadcast radio station of car radio, judge whether the second signal strength is less than preset intensity threshold the second signal strength is less than when presetting the intensity threshold, carry out voice prompt to the second signal strength of the current broadcast radio station of real-time supervision in time when the second signal strength can not satisfy and listen to the quality requirement, in time indicate to search once more of radio station, thereby switch to the better search mode of radio station effect, guaranteed the stability of the effect of listening to of radio station.
In addition, an embodiment of the present invention further provides a storage medium, where a switching program of a car radio is stored on the storage medium, and when executed by a processor, the switching program of the car radio implements the following steps:
acquiring the lock sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting a current search standard according to the lock sensitivity and the signal-to-noise ratio;
searching the current signal intensity of the radio station according to the current search standard;
acquiring the strength of a calibration signal of a target vehicle where the vehicle-mounted radio is located;
judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity;
and switching the search mode of the vehicle-mounted radio to the target mode.
Further, the switching program of the car radio realizes the following operations when being executed by the processor:
calculating the number of the radio stations of which the current signal strength is greater than the calibrated signal strength;
judging whether the number of the radio stations exceeds a preset number or not;
and when the number of the radio stations exceeds the preset number, taking a near range mode as a target mode of the vehicle-mounted radio.
Further, the switching program of the car radio realizes the following operations when being executed by the processor:
and when the number of the radio stations is less than or equal to the preset number, taking a remote mode as a target mode of the vehicle-mounted radio.
Further, the switching program of the car radio realizes the following operations when being executed by the processor:
broadcasting the target mode in a voice mode;
receiving a search instruction of a user;
setting a low-level search criterion in response to the search instruction;
searching for a first signal strength of a station based on the low level search criteria;
judging a new target mode of the vehicle-mounted radio according to the first signal intensity and the calibration signal intensity;
switching the search mode of the vehicle radio to the new target mode.
Further, the switching program of the car radio realizes the following operations when being executed by the processor:
responding to the search instruction, and acquiring the channel locking sensitivity, the noise value and the multipath elimination parameter of the vehicle-mounted radio;
and setting a low-level search standard according to the channel locking sensitivity, the noise value and the multipath elimination parameter.
Further, the switching program of the car radio realizes the following operations when being executed by the processor:
detecting a second signal intensity of a current broadcasting station of the vehicle-mounted radio;
judging whether the second signal intensity is lower than a preset intensity threshold value or not;
and when the second signal intensity is lower than the preset intensity threshold value, carrying out voice prompt.
Further, the switching program of the car radio realizes the following operations when being executed by the processor:
receiving a switching mode instruction input by a user;
and switching the search mode according to the switching mode instruction.
In the embodiment, the current search standard is set according to the station locking sensitivity and the signal-to-noise ratio by acquiring the station locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, the current signal intensity of the radio station is searched according to the current search standard, and the playing effect of each radio station can be mastered in real time by searching the signal intensity of the radio station; the method comprises the steps of obtaining the calibrated signal intensity of a target vehicle where the vehicle-mounted radio is located, judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity, and selecting the target mode which is favorable for the receiving effect of a radio station according to the current signal intensity of the radio station and the calibrated signal intensity of the target vehicle, so that the condition that the receiving effect is poor due to the fact that a received signal is influenced by external factors such as weather or building shielding is avoided; and switching the search mode of the vehicle-mounted radio to the target mode, ensuring the stability of the radio effect of the listened radio station and improving the user experience.
In addition, referring to fig. 5, an embodiment of the present invention further provides a switching device for a car radio, where the switching device for a car radio includes:
the setting module 10 is used for acquiring the lock sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting the current search standard according to the lock sensitivity and the signal-to-noise ratio.
It will be appreciated that the lock sensitivity is such that a signal above this value is acceptable to the station and not acceptable to the contrary. The method for measuring the sensitivity of the locking table comprises the following steps: measuring at low, middle and high end measuring frequency points of the receiver respectively, adjusting a volume controller until the output reaches 0.5W of standard reference output power, turning off the modulation of the high-frequency signal generator, adjusting the level of the high-frequency signal generator to enable the signal-to-noise ratio of the output of the receiver between the modulation of the high-frequency signal generator and the turning-off to reach 50dB, and recording the level of the high-frequency signal at the moment as the sensitivity of the locking stage. The signal-to-noise ratio refers to the ratio of signal to noise in the car radio. In order to search a certain number of radio stations, the current search criteria are set according to the station locking sensitivity and the signal-to-noise ratio, and the current search criteria can be set according to experience, and different station locking sensitivities and different signal-to-noise ratios correspond to different search criteria, so that a sufficient number of radio stations can be searched.
And the searching module 20 is configured to search the current signal strength of the radio station according to the current search criterion.
It can be understood that the radio reception functions of the commonly used car radio mainly include Frequency Modulation (FM) and Amplitude Modulation (AM) 2-band listening. FM, the frequency of the carrier wave is modulated according to the modulation mode of the modulation signal, the frequency range is 76-108MHz, in our country, 87.5-108 MHz, the wavelength is short, the signal quality is high, the transmission cost is low, the transmission power is small, the coverage area is small, and the influence of geographical factors is large, and the FM is generally used as the first choice of urban broadcasting, such as local music broadcasting stations, traffic broadcasting stations, and the like. The AM and the carrier wave have unchanged frequency, so that the amplitude of the carrier wave is in a modulation mode of modulating signal change, the frequency range is 520-1710 kHz, the signal quality is stable, the transmission cost is high, the transmission power is high, the coverage range is wide, but the influence of weather conditions is large, and the AM and the carrier wave are generally used as the first choice of long-distance transmission, such as China international broadcasting stations, central people broadcasting stations and the like. Searching the corresponding search standard according to the station locking sensitivity and the signal-to-noise ratio, and searching the current signal intensity of all radio stations according to the current search standard. The station includes the frequency modulation station and the amplitude modulation station.
The obtaining module 30 is configured to obtain a calibrated signal strength of a target vehicle where the vehicle-mounted radio is located.
It should be noted that the calibrated signal strength of the target vehicle where the car radio is located is the signal strength detected by the detection at the time of factory shipment, and the calibrated signal strength refers to the strength of the signal received by the car radio under normal conditions. For example, in the short range mode, the nominal signal strength of a receiving FM station is 65 dB.
And the judging module 40 is used for judging the target mode of the vehicle-mounted radio according to the current signal strength and the calibrated signal strength.
In a particular implementation, the target mode includes a long range mode and a short range mode. In the remote mode, the sensitivity is good, the selectivity is good, the passband is narrow, a weak station can be received, the noise is large, and the tone quality is poor; the remote gain is high, short waves are mainly listened, and the method is suitable for occasions outside urban areas and with low noise. In the short-range mode, the sensitivity is generally poor, the selectivity is poor and the passband is wide; the method is suitable for the radio station with small gain, strong signal, low noise and good tone quality. And judging whether the number of the radio stations with the current signal strength larger than the calibrated signal strength meets a preset number or not according to the current signal strength and the calibrated signal strength, so as to select the corresponding target mode. If the number of the radio stations with the current signal strength larger than the calibrated signal strength meets the preset number, the signal strength of the radio stations which can be searched currently is better, the short-range mode can be selected for listening to the radio stations, and a better listening effect can be achieved.
And the switching module 50 is used for switching the search mode of the vehicle-mounted radio to the target mode.
It should be understood that, in the target mode, the searched radio station has a better signal strength, and the short-range mode can be selected for listening to the radio station, and then the search mode of the car radio is switched to the target mode, so that a better listening effect can be achieved, and the user experience is improved.
In the embodiment, the current search standard is set according to the station locking sensitivity and the signal-to-noise ratio by acquiring the station locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, the current signal intensity of the radio station is searched according to the current search standard, and the playing effect of each radio station can be mastered in real time by searching the signal intensity of the radio station; the method comprises the steps of obtaining the calibrated signal intensity of a target vehicle where the vehicle-mounted radio is located, judging a target mode of the vehicle-mounted radio according to the current signal intensity and the calibrated signal intensity, and selecting the target mode which is favorable for the receiving effect of a radio station according to the current signal intensity of the radio station and the calibrated signal intensity of the target vehicle, so that the condition that the receiving effect is poor due to the fact that a received signal is influenced by external factors such as weather or building shielding is avoided; and switching the search mode of the vehicle-mounted radio to the target mode, ensuring the stability of the radio effect of the listened radio station and improving the user experience.
Other embodiments or specific implementation manners of the switching device of the car radio of the present invention may refer to the above method embodiments, and are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third and the like do not denote any order, but rather the words first, second and the like may be interpreted as indicating any order.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g., a Read Only Memory (ROM)/Random Access Memory (RAM), a magnetic disk, an optical disk), and includes several instructions for enabling a terminal device (e.g., a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. A switching method of a vehicle-mounted radio is characterized by comprising the following steps:
acquiring the lock sensitivity and the signal-to-noise ratio of the vehicle-mounted radio, and setting a current search standard according to the lock sensitivity and the signal-to-noise ratio;
searching the current signal intensity of the radio station according to the current search standard;
acquiring the strength of a calibration signal of a target vehicle where the vehicle-mounted radio is located;
judging a target mode of the vehicle-mounted radio according to the current signal strength and the calibrated signal strength, wherein the target mode comprises the following steps: a short range mode and a long range mode;
switching a search mode of the vehicle-mounted radio to the target mode;
the determining a target mode of the vehicle radio according to the current signal strength and the calibrated signal strength specifically includes:
calculating the number of the radio stations of which the current signal strength is greater than the calibrated signal strength;
judging whether the number of the radio stations exceeds a preset number or not;
when the number of the radio stations exceeds the preset number, the short-range mode is used as the target mode of the car radio.
2. The switching method of car radio according to claim 1, wherein after determining whether the number of stations exceeds a preset number, the switching method of car radio further comprises:
and when the number of the radio stations is less than or equal to the preset number, taking the remote mode as a target mode of the vehicle-mounted radio.
3. The switching method of the car radio according to claim 2, wherein the switching method of the car radio further comprises, after the remote mode is set as the target mode of the car radio when the number of the stations is less than or equal to the preset number:
broadcasting the target mode in a voice mode;
receiving a search instruction of a user;
setting a low-level search criterion in response to the search instruction;
searching for a first signal strength of a station based on the low level search criteria;
judging a new target mode of the vehicle-mounted radio according to the first signal intensity and the calibration signal intensity;
switching the search mode of the vehicle radio to the new target mode.
4. The switching method of car radio according to claim 3, wherein said setting a low level search criterion in response to said search instruction specifically comprises:
responding to the search instruction, and acquiring the channel locking sensitivity, the noise value and the multipath elimination parameter of the vehicle-mounted radio;
and setting a low-level search standard according to the channel locking sensitivity, the noise value and the multipath elimination parameter.
5. The switching method of a car radio according to any one of claims 1 to 4, wherein after the switching of the search mode of the car radio to the target mode, the switching method of a car radio further comprises:
detecting a second signal intensity of a current broadcasting station of the vehicle-mounted radio;
judging whether the second signal intensity is lower than a preset intensity threshold value or not;
and when the second signal intensity is lower than the preset intensity threshold value, carrying out voice prompt.
6. The switching method of car radio according to claim 5, wherein after the voice prompt is performed when the second signal strength is lower than the preset strength threshold, the switching method of car radio further comprises:
receiving a switching mode instruction input by a user;
and switching the search mode according to the switching mode instruction.
7. A switching apparatus of a car radio, characterized in that the switching apparatus of a car radio comprises: memory, a processor and a switching program of a car radio stored on the memory and executable on the processor, the switching program of the car radio realizing the steps of the switching method of the car radio according to any one of claims 1 to 6 when executed by the processor.
8. A storage medium, characterized in that the storage medium has stored thereon a switching program of a car radio, which when executed by a processor implements the steps of the switching method of a car radio according to any one of claims 1 to 6.
9. A switching device of a car radio is characterized in that the switching device of the car radio comprises:
the setting module is used for acquiring the locking sensitivity and the signal-to-noise ratio of the vehicle-mounted radio and setting the current search standard according to the locking sensitivity and the signal-to-noise ratio;
the searching module is used for searching the current signal intensity of the radio station according to the current searching standard;
the acquisition module is used for acquiring the calibration signal intensity of a target vehicle where the vehicle-mounted radio is located;
a judging module, configured to judge a target mode of the car radio according to the current signal strength and the calibrated signal strength, where the target mode includes: a short range mode and a long range mode;
the switching module is used for switching the search mode of the vehicle-mounted radio to the target mode;
the judging module is further configured to calculate the number of radio stations of which the current signal strength is greater than the calibrated signal strength;
the judging module is also used for judging whether the number of the radio stations exceeds a preset number;
the judging module is further configured to use the short-range mode as the target mode of the car radio when the number of the radio stations exceeds the preset number.
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