USB (Universal Serial Bus) examination earphone based on Bluetooth

Abstract

The utility model relates to the technical field of Bluetooth earphones, and discloses a Bluetooth-based USB (universal serial bus) examination earphone, which has a USB mode and a Bluetooth mode and comprises a central control unit, a loudspeaker unit, a microphone unit, a Bluetooth unit, a USB interface unit and a USB connecting line. The USB interface unit is used for detecting whether the USB connecting line is inserted into a computer or not; if it is detected that the USB connecting line is inserted into the computer and the USB interface unit is in a USB working state, the central control unit controls the USB examination earphone to be switched to the USB mode; and if it is detected that the USB connecting line is not inserted into the computer and the USB interface unit is in a Bluetooth working state, the central control unit controls the USB examination earphone to be switched to the Bluetooth mode. According to the USB examination earphone, the Bluetooth and the USB are integrated, fragmented practice can be carried out by using the Bluetooth mode in idle time through a mode switching mode, and the practicability of the USB examination earphone is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of Bluetooth earphones, in particular to a Bluetooth-based USB examination earphone. Background Art

[0002] Currently, most exam practice headsets on the market are single USB (Universal Serial Bus) exam headsets. These headsets need to be used in conjunction with school exam software. When taking an exam or practicing, a computer and a headset are required. The examinee needs to log in to the exam system through the computer, adjust the headset's playback volume and microphone wearing position in advance using the exam software, and use the headset to play voice and answer questions. The computer will store the examinee's information and answers and upload them to the relevant server for scoring. Therefore, these headsets need to be used in the school computer room and in conjunction with the exam software to be used in a targeted manner, and cannot fully utilize students' fragmented after-school time for practice. Utility Model Content

[0003] The purpose of the utility model is to provide a Bluetooth-based USB examination headset, which integrates Bluetooth and USB. Through mode switching, the Bluetooth mode can be used for fragmented practice in spare time, thereby improving the practicality of the USB examination headset.

[0004] In order to achieve the above object, the utility model provides a Bluetooth-based USB examination headset, which has a USB mode and a Bluetooth mode, and includes a central control unit, a speaker unit, a microphone unit, a Bluetooth unit, a USB interface unit, and a USB connecting cable;

[0005] The central control unit is connected to the speaker unit, microphone unit, Bluetooth unit and USB interface unit respectively, and is used to control the speaker unit and microphone unit to work; exchange information with the Bluetooth unit; and detect the working status of the USB interface unit to switch modes;

[0006] The speaker unit is used to convert the audio signal into a sound signal;

[0007] The microphone unit is used to receive sound signals, convert the received sound signals into electrical signals, and amplify the electrical signals;

[0008] The Bluetooth unit is used to transmit the audio signal and interact with the terminal APP;

[0009] The USB interface unit is used to detect whether the USB cable is plugged into the computer; if it is detected that the USB cable is plugged into the computer and the USB interface unit is in the USB working state, the central control unit controls the USB test headset to switch to the USB mode; if it is detected that the USB cable is not plugged into the computer and the USB interface unit is in the Bluetooth working state, the central control unit controls the USB test headset to switch to the Bluetooth mode;

[0010] The USB connecting cable is used to connect the USB interface unit and the computer.

[0011] In some embodiments, the Bluetooth unit adopts BT and BLE dual modes. When in BT mode, it is connected to the USB interface unit for transmitting the audio signal; when in BLE mode, it interacts with the terminal APP for information.

[0012] In some embodiments, one end of the USB cable is a Micro USB interface, and the other end is a standard USB 2.0 interface.

[0013] In some embodiments, the central control unit chip has a built-in ID, and the Bluetooth broadcast name and USB name identification are generated through the ID.

[0014] In some embodiments, the USB examination headset further includes: a power management unit and a lithium battery unit; the power management unit is used to charge and supply power to the lithium battery unit in the USB mode; and the lithium battery unit is used to supply power in the Bluetooth mode.

[0015] In some embodiments, the power management unit uses a TP4056 charging management chip as its core; and the lithium battery unit uses a 500mah single-cell polymer battery.

[0016] In some embodiments, the USB examination headset further includes: an indicator light unit and a button unit; the indicator light unit is used to indicate the working status of the USB examination headset; and the button unit is an execution entry for the user to operate the USB examination headset.

[0017] In some embodiments, the button unit includes a power button, a + button, and a - button; the button pressing modes of the button unit include short press, double press, and long press.

[0018] The present invention provides a Bluetooth-based USB examination headset. Compared with the prior art, its beneficial effects are:

[0019] It adopts USB and Bluetooth two-in-one use. When the USB examination headset is connected to the computer via a USB cable, it switches to USB mode to take the simulation test. When the USB examination headset is not connected to the computer via a USB cable, it switches to Bluetooth mode to interact with the APP to practice oral English. Therefore, you can use the Bluetooth mode for fragmented practice in your spare time, which improves the practicality of the USB examination headset. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a connection block diagram of a Bluetooth-based USB examination headset according to an embodiment of the present invention;

[0021] Figure 2 This is a structural diagram of a USB insertion detection circuit and a power management circuit according to an embodiment of the present utility model;

[0022] Figure 3 It is a structural diagram of the central control unit circuit of an embodiment of the present utility model. DETAILED DESCRIPTION

[0023] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] like Figure 1 As shown, Figure 1This is a connection block diagram of a Bluetooth-based USB examination headset according to an embodiment of the present invention. A Bluetooth-based USB examination headset according to a preferred embodiment of the present invention has USB mode and Bluetooth mode, including a central control unit 1, a speaker unit 2, a microphone unit 3, a Bluetooth unit 4, a USB interface unit 5, and a USB connection cable.

[0027] The central control unit 1 is connected to the speaker unit 2, microphone unit 3, Bluetooth unit 4 and USB interface unit 5 respectively, and is used to control the operation of the speaker unit 2 and microphone unit 3; exchange information with the Bluetooth unit 4; and detect the working status of the USB interface unit 5 to switch modes;

[0028] The speaker unit 2 is used to convert the audio signal into a sound signal;

[0029] The microphone unit 3 is used to receive sound signals, convert the received sound signals into electrical signals, and amplify the electrical signals;

[0030] The Bluetooth unit 4 is used to transmit the audio signal and interact with the terminal APP;

[0031] The USB interface unit 5 is used to detect whether the USB cable is plugged into the computer; if it is detected that the USB cable is plugged into the computer and the USB interface unit 5 is in the USB working state, the central control unit 1 controls the USB test headset to switch to the USB mode; if it is detected that the USB cable is not plugged into the computer and the USB interface unit 5 is in the Bluetooth working state, the central control unit 1 controls the USB test headset to switch to the Bluetooth mode;

[0032] The USB connection cable is used to connect the USB interface unit 5 and the computer.

[0033] For example, the central control unit 1, also known as the MCU, integrates a rich set of peripherals. By loading the headset firmware, it controls the speaker unit 2, microphone unit 3, Bluetooth unit 4, and USB interface unit 5. For example, it detects the operating status and battery level of the power management unit 6, controls the speaker unit 2 and microphone unit 3 through DSP audio processing, detects the operating status of the USB interface unit 5 to switch modes, and controls the indicator light unit 8 according to different modes and states. It can also interact with the Bluetooth unit for audio and command. The USB exam headset uses a two-in-one USB and Bluetooth mode, enabling fragmented after-school practice through intelligent mode switching. During exams in the school computer room, the headset can be connected to a computer via a USB cable and switched to the exam headset for use. After-school practice can be performed in Bluetooth mode in conjunction with the corresponding app. Each headset's broadcast name and USB name are based on a 14-bit unique ID. The speaker unit 2 is primarily the audio output device of the USB exam headset, converting electrical signals into sound signals so that the user can hear the audio content. The microphone unit 3 is responsible for sound recognition. The sound vibration pushes the diaphragm, causing the magnet inside to generate a changing current, which is then amplified by the sound processing circuit.

[0034] In a specific embodiment, the Bluetooth unit 4 adopts BT and BLE dual modes. When in BT mode, it is connected to the USB interface unit for transmitting the audio signal; when in BLE mode, it interacts with the terminal APP for information.

[0035] For example, when the USB test headset is connected to a computer via the USB cable, the Bluetooth unit 4 is in BT mode, connected to the USB interface unit 5, and Bluetooth mode is disabled, allowing audio signal transmission. When the USB test headset is not connected to a computer, the Bluetooth unit 4 is in BLE mode, and is used to exchange information (such as the score, duration, and manufacturer-defined data of the exercise) with the mobile phone app to practice speaking. The USB test headset's BLE broadcast signal is only activated after the BT connection is established, ensuring that BLE cannot be used for data exchange when the BT is not connected.

[0036] In a specific embodiment, one end of the USB connection cable is a Micro USB interface, and the other end is a standard USB 2.0 interface.

[0037] For example, the USB connection cable is 2.5 meters long and pluggable, with one end being a Micro USB interface (connected to the USB examination headset) and the other end being a standard USB2.0 interface (connected to the computer). When the USB examination headset is connected to the computer via the USB connection cable, it will automatically enter USB mode (standard examination mode), and can be used as an examination headset; when the USB connection cable of the headset is unplugged, the USB examination headset will automatically switch to Bluetooth mode.

[0038] In a specific embodiment, the central control unit 1 chip has a built-in ID, and the Bluetooth broadcast name and USB name identification are generated through the ID.

[0039] For example, users can confirm Bluetooth connection through the laser-engraved ID on the USB test headset, preventing cross-connection when multiple people and multiple devices are using it. The ID can be used to trace the test file, ensuring the fairness of the test. For example, after powering on, the processor obtains the chip's internal 12-bit ID number (uniqueness), performs a CRC32 operation, and then converts the 12-bit ID into a 14-bit unique code (discrete encrypted code) by performing an XOR operation with the public key. The USB test headset broadcasts the 14-bit unique code as the broadcast name via BT. The last 12 bits of the USB test headset's BT MAC address are used as the MAC unique code. The USB name is converted from the 14-bit unique code to the name. The USB test headset's BLE (Bluetooth Low Energy) technology is broadcast as the 14-bit unique code + BLE suffix as the Bluetooth broadcast name. Due to the uniqueness of the USB test headset's ID, the USB test headset can be used in complex environments with multiple people and multiple devices (such as a classroom), while ensuring the accuracy of oral practice in such environments.

[0040] In a specific embodiment, the USB examination headset further includes: a power management unit 6 and a lithium battery unit 7; the power management unit 6 is used to charge and supply power to the lithium battery unit 7 in the USB mode; the lithium battery unit 7 is used to supply power in the Bluetooth mode.

[0041] In a specific embodiment, the power management unit 6 uses a TP4056 charging management chip as its core; the lithium battery unit 7 uses a 500mah single-cell polymer battery.

[0042] For example, when the USB interface unit 5 is connected to the computer, the power management unit 6 charges the single-cell polymer battery, and at the same time, the USB interface unit 5 will power other units through path switching; the lithium battery unit 7 uses a 500mah single-cell polymer battery, which is mainly used to power the central control unit 1, etc. in Bluetooth mode. Under normal circumstances, a full charge can be used for one month.

[0043] In a specific embodiment, the USB test headset further includes: an indicator light unit 8 and a button unit 9; the indicator light unit 8 is used to indicate the working status of the USB test headset; the button unit 9 is the execution entry for the user to operate the USB test headset.

[0044] In a specific embodiment, the button unit 9 includes a power button, a + button, and a - button; the button pressing modes of the button unit 9 include short press, double press, and long press.

[0045] For example, double-clicking the power button can switch between playback content and volume, long pressing the power button can turn on / off the USB exam headset, and short pressing the + button can play the next audio or increase the volume.

[0046] like Figure 2-3 As shown, Figure 2 This is a structural diagram of the USB insertion detection circuit and power management circuit of the embodiment of the utility model. Figure 3 This is a structural diagram of the central control unit circuit of an embodiment of the utility model;

[0047] When the user plugs one end of the USB test headset into the USB interface unit 5 and the other end into the computer via a USB cable, pin 1 (VBUS) of the USB interface unit 5 (JACK1) is the positive pole of the power supply, and a 5V power supply will be present. This pin is connected to pin 1 of the charging management chip U5 (TP4054) of the power management unit 6. Pin 3 (battery pin) of the charging management chip U5 is connected to pin 2 of the battery socket of the lithium battery unit 7 to charge the polymer lithium battery of the lithium battery unit 7. The charging current is determined by the resistance value of R1 (2.7K represents 500MA). The main control chip of the central control unit 1 detects the current and voltage information of the battery voltage pins (pins 3 and 4) of the charging management chip U5 to calculate the remaining power of the battery. At the same time, pins 3 and 2 of the USB interface unit 5 (JACK1) are the positive and negative poles of the data line and are connected to pins 18 and 19 of the main control chip U1 (SoC chip) of the central control unit 1 for signaling interaction. Pins 18 and 19 of the main control chip are connected as the positive and negative poles of the USB data. The SoC chip is a high-performance wireless audio chip that supports Bluetooth connectivity and features low power consumption and high integration. It provides stable audio transmission and excellent sound quality, bringing users a convenient, high-quality wireless audio experience. At this time, the central control unit 1 will detect whether the VBUS on pin 1 of JACK1 is at a high level. If so, the input on pin 6 of the main control chip will be high, and the central control unit 1 will switch the headset to USB mode, disabling the Bluetooth function. For example, the process of determining USB insertion and interaction is as follows: The USB test headset determines whether a USB is inserted. First, it determines whether the USB power supply is 5V. If so, the connection is successful, and the Bluetooth mode is automatically turned off and the USB mode is entered. At this time, the USB test headset is used in accordance with the standard UAC protocol; the UAC standard includes: device enumeration and configuration (the UAC standard defines how USB audio devices are enumerated and configured by the host computer. This includes identifying the device, determining its functions, and loading the corresponding drivers), audio data transmission (the UAC standard defines how audio data is transmitted between the USB audio device and the host computer. This includes setting the sampling rate, bit depth and number of channels, as well as transmitting audio data packets) and control and function support (the UAC standard defines a set of standard controls and functions supported by USB audio devices. This includes volume control, mute and gain control, as well as more advanced functions). The USB name of each USB test headset is converted into a 14-bit unique code. At this time, the computer playback and recording will automatically enable the USB of the USB test headset.

[0048] When the user unplugs the USB cable, there is no 5V power supply at pin 1 of the USB interface unit 5 (JACK1), and pin 6 of the main control chip will output a low level. At this time, the headset will automatically switch to Bluetooth mode and the USB function will be disabled; pin 8 of the main control chip is the chip power supply pin (powered by the battery), pins 11 and 12 of the main control chip are the up and down buttons, pin 14 of the main control chip is the power button, pin 15 of the main control chip is the Bluetooth antenna, pin 16 of the main control chip is the crystal oscillator, pin 22 of the main control chip is the microphone voltage detection pin, pin 25 of the main chip is the microphone, and pins 28 and 29 of the main chip are speaker outputs.

[0049] In summary, the embodiment of the present invention provides a Bluetooth-based USB examination headset, which is used in a USB and Bluetooth two-in-one mode. When the USB examination headset is connected to the computer via a USB cable, it switches to USB mode to conduct a simulated test. When the USB examination headset is not connected to the computer via a USB cable, it switches to Bluetooth mode to interact with the APP to practice oral English. Therefore, the Bluetooth mode can be used for fragmented practice in free time, thereby improving the practicality of the USB examination headset.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A Bluetooth-based USB examination headset, characterized in that: It has USB mode and Bluetooth mode, including a central control unit, a speaker unit, a microphone unit, a Bluetooth unit, a USB interface unit, and a USB connecting cable; The central control unit is connected to the speaker unit, microphone unit, Bluetooth unit and USB interface unit respectively, and is used to control the speaker unit and microphone unit to work; Interacting with the Bluetooth unit; detecting the working status of the USB interface unit to switch modes; The speaker unit is used to convert the audio signal into a sound signal; The microphone unit is used to receive sound signals, convert the received sound signals into electrical signals, and amplify the electrical signals; The Bluetooth unit is used to transmit the audio signal and interact with the terminal APP; The USB interface unit is used to detect whether the USB cable is plugged into the computer; if it is detected that the USB cable is plugged into the computer and the USB interface unit is in the USB working state, the central control unit controls the USB test headset to switch to the USB mode; if it is detected that the USB cable is not plugged into the computer and the USB interface unit is in the Bluetooth working state, the central control unit controls the USB test headset to switch to the Bluetooth mode; The USB connecting cable is used to connect the USB interface unit and the computer.

2. The Bluetooth-based USB examination headset according to claim 1, characterized in that: The Bluetooth unit adopts BT and BLE dual modes. When in BT mode, it is connected to the USB interface unit for transmitting the audio signal; when in BLE mode, it interacts with the terminal APP for information.

3. The Bluetooth-based USB examination headset according to claim 1, wherein: One end of the USB cable is a Micro USB interface, and the other end is a standard USB 2.0 interface.

4. The Bluetooth-based USB examination headset according to claim 1, wherein: The central control unit chip has a built-in ID, and generates the identification of the Bluetooth broadcast name and the USB name through the ID.

5. The Bluetooth-based USB examination headset according to claim 1, wherein: The USB examination headset further includes: a power management unit and a lithium battery unit; the power management unit is used to charge and supply power to the lithium battery unit in the USB mode; the lithium battery unit is used to supply power in the Bluetooth mode.

6. The Bluetooth-based USB examination headset according to claim 5, characterized in that: The power management unit uses the TP4056 charging management chip as the core; the lithium battery unit uses a 500mah single-cell polymer battery.

7. The Bluetooth-based USB examination headset according to claim 1, wherein: The USB examination headset further includes: an indicator light unit and a button unit; the indicator light unit is used to indicate the working status of the USB examination headset; the button unit is the execution entry for the user to operate the USB examination headset.

8. The Bluetooth-based USB examination headset according to claim 7, wherein: The button unit includes a power button, a + button, and a - button; the button modes of the button unit include short press, double press, and long press.

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