CN113411714A - Antenna signal intensity-based in-ear detection method for TWS (two way transmission) headset and TWS headset - Google Patents
Antenna signal intensity-based in-ear detection method for TWS (two way transmission) headset and TWS headset Download PDFInfo
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- H—ELECTRICITY
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- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
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Abstract
The invention provides an in-ear detection method of a TWS earphone based on antenna signal strength and the TWS earphone, comprising storing RSSI basic data in a chip of the TWS earphone; judging by using an infrared detection device, and judging the RSSI if the infrared ray is shielded; and detecting RSSI actual data in real time, comparing the detected RSSI actual data with RSSI basic data, if the RSSI actual data is in the RSSI basic data range, judging that the earphone is in an in-ear state, and if the RSSI actual data exceeds the RSSI basic data range, judging that the earphone is in a non-in-ear state. By comparing the actual RSSI data with the basic RSSI data, whether the distance between the left ear earphone and the right ear earphone is the distance of the head of the user can be obtained, and whether the earphone is in an in-ear state can be further judged. The RSSI data acquisition depends on a wireless communication module of the TWS earphone, so that no additional component is needed, and the problem of how to improve the in-ear detection accuracy on the basis of not additionally adding the TWS earphone component is solved.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to an in-ear detection method of a TWS earphone based on antenna signal strength and the TWS earphone.
Background
With the development of society, electronic products are changing day by day, and earphones are gradually developed from wired earphones to wireless earphones, so that wired constraint between human ears and a player is released. At present, most of wireless earphones realize audio interconnection between the earphones and the player in a Bluetooth transmission mode.
Because a pair of earphones has two earphones for the left and right ears, if the earphones are wirelessly connected with the player through the Bluetooth, the two earphones for the left and right ears still need to be connected through wires, which is not beneficial to people in some scenes. To solve this problem, the concept of TWS headphones has been proposed. The full name of TWS is True Wireless Stereo, meaning True Wireless Stereo. The TWS technology is developed based on the Bluetooth technology, and the working principle of the TWS technology is that a player is connected with a main earphone, and then the main earphone is quickly connected with an auxiliary earphone in a wireless mode, so that the Bluetooth left and right sound channels of a wireless earphone are wirelessly separated for use.
However, since the wireless earphone is wirelessly connected to the player, and the left-ear earphone is wirelessly connected to the right-ear earphone, how to automatically determine whether the earphone is worn by a user becomes a necessary function for implementing the earphone function, which is also called an in-ear detection function. At present, the TWS headset mostly adopts the optical detection sensor to realize the function, and when the light emitted by the optical detection sensor on the headset is blocked, the headset is considered to be worn into the ear, but in this mode, if the headset is taken down by a user and placed on other platforms, and the light of the optical detection sensor is just blocked by the platforms, the light can still be misjudged as the in-ear state, which affects the experience. In order to solve the misjudgment brought by the optical detection sensor, a capacitance detection sensor is added in some high-end earphones, and whether the earphones are in the ears or not is comprehensively judged by the capacitance detection sensor and the optical detection sensor. For example, patent application No. 201911039126.9 entitled "a TWS headset and its in-ear detection method" and patent application No. 202110274738.7 entitled "in-ear detection method for TWS headset, TWS headset and computer readable storage medium" all disclose that the determination of in-ear detection is achieved by adding additional detection means/sensors to improve the accuracy of in-ear detection.
Although the mode of additionally adding the detection device or the sensor can avoid misjudgment caused by a single optical detection sensor, the additional detection device/sensor is added, so that the cost of the product is increased, the power consumption of the product is also increased, and the cost performance and the market competitiveness of the product are influenced.
Disclosure of Invention
The invention aims to provide an in-ear detection method of a TWS earphone based on antenna signal strength and the TWS earphone, and aims to solve the problem of how to improve the in-ear detection accuracy on the basis of not additionally increasing TWS earphone components.
In order to solve the technical problem, the invention provides an in-ear detection method of a TWS headset based on antenna signal strength, which comprises the following steps:
storing RSSI basic data in a chip of a TWS earphone, wherein the RSSI basic data is received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user;
judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are blocked, judging the RSSI (received signal strength indicator);
the RSSI judgment comprises the following steps: and detecting RSSI actual data in real time, comparing the detected RSSI actual data with the RSSI basic data, if the RSSI actual data is in the RSSI basic data range, judging that the earphone is in an in-ear state, and if the RSSI actual data exceeds the RSSI basic data range, judging that the earphone is in a non-in-ear state.
Optionally, in the method for detecting an in-ear of a TWS headset based on antenna signal strength, the method further includes:
and judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are not shielded, judging that the earphone is in a non-in-ear state.
Optionally, in the method for detecting an ear entry of a TWS headset based on antenna signal strength, the method for storing RSSI basic data in a chip of the TWS headset includes:
setting RSSI initial data in a chip, wherein the RSSI initial data is a theoretical value of received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user;
correcting the RSSI initial data according to real-time detected RSSI actual data to obtain RSSI basic data;
and storing the RSSI basic data into a chip.
Optionally, in the method for detecting an ear entry of a TWS headset based on antenna signal strength, the method for correcting the RSSI initial data according to the RSSI actual data detected in real time includes:
acquiring RSSI actual data of the earphone in real time;
selecting a time period in which the RSSI actual data are kept stable, solving an average value of all measured RSSI actual data in the time period, and taking the average value as RSSI correction data;
correcting the RSSI initial data by using the RSSI correction data to obtain RSSI basic data:
optionally, in the method for detecting the entrance of the TWS headset based on the antenna signal strength, a time period during which the RSSI actual data is kept stable is selected to be within 30 minutes after the headset is taken out of the charging box.
Optionally, in the method for detecting an ear entry of a TWS headset based on antenna signal strength, the method for correcting the RSSI initial data according to the RSSI actual data detected in real time further includes: and after the earphone is taken out of the charging box every time, recalculating RSSI correction data, and correcting the RSSI initial data by using the recalculated RSSI correction data to obtain RSSI basic data.
Optionally, in the method for detecting an ear entry of a TWS headset based on antenna signal strength, the method for correcting the RSSI initial data according to the RSSI actual data detected in real time further includes: and recording the RSSI correction data obtained each time, and performing weighted average calculation on all the RSSI correction data within a preset time interval from the current time and the RSSI correction data at the current time to obtain optimized RSSI correction data, wherein the RSSI correction data closer to the current time have larger weight.
In order to solve the technical problem, the invention further provides a TWS headset, wherein the method for detecting the entrance of the TWS headset is any one of the methods for detecting the entrance of the TWS headset based on the antenna signal strength, the TWS headset comprises a main headset and an auxiliary headset, the main headset and the auxiliary headset are respectively provided with an infrared detection device, a signal transceiver and a chip, and the chip is used for detecting the entrance of the TWS headset according to data transmitted by the infrared detection device and the signal transceiver.
Optionally, in the TWS headset, the infrared detection device is an infrared detection sensor; the signal receiving and transmitting device comprises an antenna and a mainboard, wherein the antenna is electrically connected with the mainboard, and the mainboard is used for acquiring RSSI actual data between the antenna of the main earphone and the antenna of the auxiliary earphone.
The invention provides an in-ear detection method of a TWS earphone based on antenna signal strength and the TWS earphone, comprising the following steps: storing RSSI basic data in a chip of a TWS earphone, wherein the RSSI basic data is received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user; judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are blocked, judging the RSSI (received signal strength indicator); the RSSI judgment comprises the following steps: and detecting RSSI actual data in real time, comparing the detected RSSI actual data with the RSSI basic data, if the RSSI actual data is in the RSSI basic data range, judging that the earphone is in an in-ear state, and if the RSSI actual data exceeds the RSSI basic data range, judging that the earphone is in a non-in-ear state. By comparing the actual RSSI data with the basic RSSI data, whether the distance between the left ear earphone and the right ear earphone is the distance of the head of the user can be obtained, and whether the earphone is in an in-ear state can be further judged. The RSSI data acquisition depends on a wireless communication module of the TWS earphone, so that no additional component is needed, and the problem of how to improve the in-ear detection accuracy on the basis of not additionally adding the TWS earphone component is solved.
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Fig. 1 is a flowchart of an in-ear detection method of a TWS headset based on antenna signal strength according to this embodiment.
Detailed Description
The method for detecting the entrance of the TWS headset based on the antenna signal strength and the TWS headset according to the present invention will be described in detail with reference to the accompanying drawings and the embodiments. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.
It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of the present invention and the accompanying drawings, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
RSSI (Received Signal Strength Indication), which is a theoretical term for radio frequency signals, has a ranging theory: the principle that signal power is attenuated along with propagation distance according to the transmission of radio waves or sound waves in a medium is mainly applied to distance measurement between a transmitter and a receiver according to the energy intensity of a received signal.
Based on the RSSI ranging principle, this embodiment provides an in-ear detection method for a TWS headset based on antenna signal strength, as shown in fig. 1, the in-ear detection method includes:
storing RSSI basic data in a chip of a TWS earphone, wherein the RSSI basic data is received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user;
judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are blocked, judging the RSSI (received signal strength indicator);
the RSSI judgment comprises the following steps: and detecting RSSI actual data in real time, comparing the detected RSSI actual data with the RSSI basic data, if the RSSI actual data is in the RSSI basic data range, judging that the earphone is in an in-ear state, and if the RSSI actual data exceeds the RSSI basic data range, judging that the earphone is in a non-in-ear state.
In the method for detecting the in-ear of the TWS headset based on the antenna signal strength provided by this embodiment, by comparing the actual RSSI data with the basic RSSI data, it can be obtained whether the distance between the left-ear headset and the right-ear headset is the distance from the head of the user, and thus it can be determined whether the headset is in-ear state. The RSSI data acquisition depends on a wireless communication module of the TWS earphone, so that no additional component is needed, and the problem of how to improve the in-ear detection accuracy on the basis of not additionally adding the TWS earphone component is solved.
Further, in this embodiment, the method for detecting an ear entrance further includes:
and judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are not shielded, judging that the earphone is in a non-in-ear state.
In practical application, the earphone firstly performs infrared detection to preliminarily judge the in-ear state, and if the infrared rays are not shielded, the earphone can be determined to be in the non-in-ear state; if the infrared ray is blocked, there may be misjudgment caused by blocking of other objects, so that the RSSI is further needed to be used for further in-ear detection under the condition that the infrared ray is blocked.
In this embodiment, the method for storing RSSI basic data in a chip of a TWS headset includes:
setting RSSI initial data in a chip, wherein the RSSI initial data is a theoretical value of received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user;
correcting the RSSI initial data according to real-time detected RSSI actual data to obtain RSSI basic data;
and storing the RSSI basic data into a chip.
The initial data of the RSSI can be obtained by means of simulation test and the like in the research and development stage of the earphone. In the same earphone, the RSSI initial data may be the same and is directly written into the earphone chip when leaving the factory.
Specifically, the method for correcting the RSSI initial data according to the real-time detected RSSI actual data includes:
acquiring RSSI actual data of the earphone in real time;
selecting a time period in which the RSSI actual data are kept stable, solving an average value of all measured RSSI actual data in the time period, and taking the average value as RSSI correction data;
correcting the RSSI initial data by using the RSSI correction data to obtain RSSI basic data:
preferably, the time period for the RSSI actual data to remain stable is selected to be within 30 minutes after the earphone is taken out of the charging box. Because people can take out the earphone from the charging box only when the earphone needs to be used, the time period of selecting the RSSI actual data within 30 minutes after the earphone is taken out can ensure that the earphone is worn in the ear of a user, and therefore the wrong selection of the RSSI actual data caused by the fact that the earphone is placed in other areas for a long time is prevented.
In practical application, when the actual RSSI data is detected in real time, the period for acquiring the actual RSSI data does not exceed 3s, for example, the actual RSSI data is acquired every 1 s. The actual RSSI data is kept stable, which means that the maximum difference of the actual RSSI data in a period of time is smaller than a set value, i.e. the actual RSSI data has less fluctuation in the period of time. If the fluctuation is large, it can be understood that the usage environment of the earphone is greatly changed, and therefore, in order to ensure that the selected actual RSSI data is the RSSI data when the user wears the earphone, the fluctuation should be ensured to be small. In addition, the average value of the plurality of RSSI actual data with stable data is obtained, so that possible interferences such as noise points and the like among the plurality of RSSI actual data can be balanced, and the obtained RSSI corrected data is more accurate.
The RSSI basic data are obtained not only by the RSSI initial data but also by the RSSI correction data, because the RSSI initial data reflect the wireless communication characteristics of the earphone, and the RSSI correction data are personalized differences among different users generated according to different specific wearing environments (such as head tissues, structures, sizes and the like) of the different users, so that the RSSI basic data are associated with the RSSI initial data and the RSSI correction data, the RSSI under the using environment generated by the earphone and the earphone wearing users together can be simultaneously reflected, and the in-ear condition of the earphone can be more accurately judged.
Further, in this embodiment, the method for correcting the RSSI initial data according to the real-time detected RSSI actual data further includes: and after the earphone is taken out of the charging box every time, recalculating RSSI correction data, and correcting the RSSI initial data by using the recalculated RSSI correction data to obtain RSSI basic data.
Since the wearer of the earphone is indefinite after the earphone is taken out, the RSSI correction data should be recalculated in consideration of the influence of the heads of different users on the RSSI data, so that the RSSI basic data corresponding to the current user is obtained, and the accuracy of in-ear detection is improved.
Preferably, in this embodiment, the method for correcting the RSSI initial data according to the real RSSI data detected in real time further includes: and recording the RSSI correction data obtained each time, and performing weighted average calculation on all the RSSI correction data within a preset time interval from the current time and the RSSI correction data at the current time to obtain optimized RSSI correction data, wherein the RSSI correction data closer to the current time have larger weight.
In order to avoid the erroneous determination possibly caused by calculating the RSSI correction data once, such as the erroneous determination caused by situations of not being worn in place, sharing between two persons, and the like, in this embodiment, the final current RSSI correction data is obtained by using the weighted average of a plurality of RSSI correction data, and the weight of the RSSI correction data closer to the current time is set to be larger, so that the deviation of the RSSI correction data caused by the change of the environmental factor can be effectively controlled, and the accuracy of the in-ear detection is further improved.
Certainly, in other embodiments, the RSSI correction data may be more suitable for practical applications by fitting the RSSI correction data by a least square method, or obtaining the optimized RSSI correction data by a deep learning method.
The present embodiment further provides a TWS headset, where the method for detecting an ear entry used by the TWS headset is the method for detecting an ear entry of a TWS headset based on antenna signal strength provided by the present invention, where the TWS headset includes a primary headset and a secondary headset, and the primary headset and the secondary headset are both provided with an infrared detection device, a signal transceiver, and a chip, and the chip is used to perform the headset ear entry detection according to data transmitted by the infrared detection device and the signal transceiver.
Specifically, the infrared detection device is an infrared detection sensor; the signal receiving and transmitting device comprises an antenna and a mainboard, wherein the antenna is electrically connected with the mainboard, and the mainboard is used for acquiring RSSI actual data between the antenna of the main earphone and the antenna of the auxiliary earphone.
It should be understood by those skilled in the art that the TWS headset may have other corresponding structures, devices, components, etc. for realizing the functions of the TWS headset, and other TWS headsets without departing from the spirit of the present invention shall also fall within the protection scope of the present invention.
In addition, in the TWS headset provided in this embodiment, except that the functions of the headset chip may be different due to different in-ear detection modes, other hardware may be consistent when being disposed in the existing TWS headset, so that the manufacturing and processing costs of the TWS headset may not be increased.
In summary, the in-ear detection method for a TWS headset based on antenna signal strength and the TWS headset provided in this embodiment include: storing RSSI basic data in a chip of a TWS earphone, wherein the RSSI basic data is received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user; judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are blocked, judging the RSSI (received signal strength indicator); the RSSI judgment comprises the following steps: and detecting RSSI actual data in real time, comparing the detected RSSI actual data with the RSSI basic data, if the RSSI actual data is in the RSSI basic data range, judging that the earphone is in an in-ear state, and if the RSSI actual data exceeds the RSSI basic data range, judging that the earphone is in a non-in-ear state. By comparing the actual RSSI data with the basic RSSI data, whether the distance between the left ear earphone and the right ear earphone is the distance of the head of the user can be obtained, and whether the earphone is in an in-ear state can be further judged. The RSSI data acquisition depends on a wireless communication module of the TWS earphone, so that no additional component is needed, and the problem of how to improve the in-ear detection accuracy on the basis of not additionally adding the TWS earphone component is solved.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (10)
1. An in-ear detection method of a TWS headset based on antenna signal strength, the in-ear detection method comprising:
storing RSSI basic data in a chip of a TWS earphone, wherein the RSSI basic data is received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user;
judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are blocked, judging the RSSI (received signal strength indicator);
the RSSI judgment comprises the following steps: and detecting RSSI actual data in real time, comparing the detected RSSI actual data with the RSSI basic data, if the RSSI actual data is in the RSSI basic data range, judging that the earphone is in an in-ear state, and if the RSSI actual data exceeds the RSSI basic data range, judging that the earphone is in a non-in-ear state.
2. The method of claim 1, wherein the method further comprises:
and judging by using an infrared detection device, and if the infrared rays emitted by the infrared detection device are not shielded, judging that the earphone is in a non-in-ear state.
3. The method of claim 1, wherein the method of storing RSSI basic data in a chip of a TWS headset comprises:
setting RSSI initial data in a chip, wherein the RSSI initial data is a theoretical value of received signal strength indication between a left ear earphone and a right ear earphone when the earphone is worn by a user;
correcting the RSSI initial data according to real-time detected RSSI actual data to obtain RSSI basic data;
and storing the RSSI basic data into a chip.
4. The method of claim 3, wherein the correcting the RSSI initial data based on the real-time detected RSSI actual data comprises:
acquiring RSSI actual data of the earphone in real time;
selecting a time period in which the RSSI actual data are kept stable, solving an average value of all measured RSSI actual data in the time period, and taking the average value as RSSI correction data;
correcting the RSSI initial data by using the RSSI correction data to obtain RSSI basic data:
5. the method of claim 4, wherein the time period for which the RSSI data remains stable is selected to be within 30 minutes after the headset is removed from the charging box.
6. The method of claim 4, wherein the correcting the RSSI initial data based on the real-time detected RSSI actual data further comprises: and after the earphone is taken out of the charging box every time, recalculating RSSI correction data, and correcting the RSSI initial data by using the recalculated RSSI correction data to obtain RSSI basic data.
7. The method of claim 6, wherein the correcting the RSSI initial data based on the real-time detected RSSI actual data further comprises: and recording the RSSI correction data obtained each time, and performing weighted average calculation on all the RSSI correction data within a preset time interval from the current time and the RSSI correction data at the current time to obtain optimized RSSI correction data, wherein the RSSI correction data closer to the current time have larger weight.
8. The method of claim 1, wherein the RSSI actual data is detected in real time, and the period for acquiring the RSSI actual data does not exceed 3 s.
9. A TWS earphone, the in-ear detection method adopted by the TWS earphone is the in-ear detection method of the TWS earphone based on the antenna signal strength as claimed in any one of claims 1 to 8, characterized in that the TWS earphone comprises a main earphone and an auxiliary earphone, the main earphone and the auxiliary earphone are respectively provided with an infrared detection device, a signal transceiver and a chip, and the chip is used for carrying out earphone in-ear detection according to data transmitted by the infrared detection device and the signal transceiver.
10. A TWS headset according to claim 9, wherein the infrared detection means is an infrared detection sensor; the signal receiving and transmitting device comprises an antenna and a mainboard, wherein the antenna is electrically connected with the mainboard, and the mainboard is used for acquiring RSSI actual data between the antenna of the main earphone and the antenna of the auxiliary earphone.
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|---|---|---|---|---|
| CN116539088A (en) * | 2023-05-05 | 2023-08-04 | 青岛海威茨仪表有限公司 | Bubble depth judgment model and method for instrument, detection system and method |
| CN116539088B (en) * | 2023-05-05 | 2023-11-17 | 青岛海威茨仪表有限公司 | Method, system and method for judging bubble depth of instrument |
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Application publication date: 20210917 |