Wireless microphone sound amplification system based on Hall switch

Abstract

The invention discloses a wireless microphone sound amplification system based on a Hall switch. The wireless microphone sound amplification system comprises a wireless microphone transmitting device, a wireless microphone receiving device and a wireless microphone transmitting device, wherein the wireless microphone transmitting device comprises a microphone, a first wireless module, a first main control module and a magnet; the wireless microphone receiving device comprises a loudspeaker, a second wireless module, a second main control module and a Hall switch; and the pairing control system triggers pairing when the distance between the magnet and the Hall switch is less than or equal to 5cm, and the wireless microphone receiving device screens the wireless microphone transmitting device through a dynamic RSSI (Received Signal Strength Indicator) threshold value. According to the invention, the Hall switch triggering and the RSSI secondary screening are combined, and the sensing distance is less than or equal to 5cm, so that compared with a traditional RSSI-based pairing mode, the accuracy of pairing triggering is greatly improved, unnecessary misoperation is avoided, and the error connection rate is effectively reduced; and the standard operation of teachers is cultivated through a touch type pairing mode, so that the operation error rate is reduced, and equipment faults and inconvenience in use caused by misoperation are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of education and teaching, and particularly relates to a wireless microphone sound reinforcement system based on a Hall switch. Background Art

[0002] In the field of education and teaching, microphones are widely used and are increasingly recognized by many educators. Microphones can provide clear voice transmission, enabling students and audiences to better hear the explanations of teachers or trainers, greatly improving the teaching effect and reducing the vocal stress on teachers. With the development and innovation of microphone technology, microphones have evolved from wired microphones to wireless microphones. Wireless microphones include different technical solution types such as FM wireless microphones, VHF wireless microphones, UHF wireless microphones, 2.4GHz wireless microphones, etc.

[0003] The following disadvantages still exist in the prior art:

[0004] 1. Disadvantages of wired microphones represented by "Xiaomifeng": They are relatively large in size, inconvenient for teachers to carry, and need to be charged frequently.

[0005] 2. "One microphone per classroom" wireless microphone system: Since each microphone transmitting device is fixed in a classroom and many teachers share one microphone, it is unhygienic.

[0006] 3. "One microphone per teacher" wireless microphone system based on RSSI signal strength judgment for close-range pairing: This type of wireless microphone system is more advanced than the "one microphone per classroom" wireless microphone system and solves the hygiene problem of multiple people sharing a microphone. The "one microphone per teacher" system based on the RSSI signal strength close-range pairing scheme uses the RSSI signal field strength to control the connection distance. The stronger the RSSI signal, the closer the distance. When the RSSI signal value is greater than a set threshold, it is considered within the pairing distance range, and the transmitting device and the receiving device can be allowed to connect and be used for sound reinforcement. Although this solution solves the hygiene and connection problems of the microphone, there are still some disadvantages in this technical solution:

[0007] (1) It is not easy to determine the RSSI signal threshold for pairing conditions. According to the layout of multiple classrooms, the pairing connection may usually be set within 2 meters. However, due to different test conditions, when the signal conditions are good, it may also be possible to connect at 5 meters, and it is difficult to connect within 2 meters in the case of poor signal conditions.

[0008] (2) Since the RSSI signal strength value may be affected by the environment and is sometimes inaccurate. For example, if the classroom wall is relatively thin and the signal strength of the receiver in the adjacent classroom is relatively large, it may also be misjudged as a device within the connectable range and connected to the adjacent classroom.

[0009] (3) The normal pairing distance judgment condition may be measured under the condition of good transceiver conditions of the microphone antenna. Some teachers are not very clear about this. If you hold the microphone in your hand, it is possible that your palm just holds the microphone antenna part, and the RSSI strength will be very small. It may not be possible to connect even if you are standing within the connectable range, which will bring a lot of confusion and inconvenience to the teachers' use. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a wireless microphone sound reinforcement system based on a Hall switch.

[0011] To solve the above technical problems, the present invention provides the following technical solutions:

[0012] The present invention provides a wireless microphone sound reinforcement system based on a Hall switch, including:

[0013] Wireless microphone transmitting device: including a microphone head, a first wireless module, a first main control module, and a magnet;

[0014] Wireless microphone receiving device: including a speaker, a second wireless module, a second main control module, and a Hall switch;

[0015] Pairing control system: When the distance between the magnet and the Hall switch ≤ 5 cm, pairing is triggered, and the wireless microphone receiving device screens the wireless microphone transmitting device through a dynamic RSSI threshold.

[0016] As a preferred technical solution of the present invention, the dynamic RSSI threshold calculation formula is:

[0017] Threshold = α·P base +β·In(d max );

[0018] Wherein, P base is the reference signal strength, d max is the preset maximum connection distance, and α and β are environmental adaptation coefficients.

[0019] As a preferred technical solution of the present invention, the pairing process includes:

[0020] The wireless microphone receiving device detects the Hall switch trigger signal;

[0021] The first main control module starts the second wireless module to scan the surrounding transmitting devices;

[0022] Screen the transmitting devices with RSSI value ≥ -65 dBm for connection.

[0023] As a preferred technical solution of the present invention, the system supports the management of device unique identifiers. The MAC address of each wireless microphone transmitting device is bound to the teacher's account, and the wireless microphone receiving device can store group binding relationships.

[0024] As a preferred technical solution of the present invention, the system supports the management of multi-classroom scenarios. The wireless microphone receiving device realizes cross-classroom roaming through IP address binding.

[0025] As a preferred technical solution of the present invention, the wireless microphone receiving device is equipped with a dual-power supply module, supporting automatic switching between PoE power supply and lithium battery.

[0026] As a preferred technical solution of the present invention, the wireless microphone transmitting device is set to an intelligent sleep mode. When the microphone detects a silent signal for a continuous number of seconds, it enters the deep sleep state.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] 1: The present invention combines Hall switch triggering with RSSI secondary screening, with an induction distance ≤ 5 cm. Compared with the traditional RSSI-based pairing method, it greatly improves the accuracy of pairing triggering, avoids unnecessary misoperations, and effectively reduces the misconnection rate; and through the touch-based pairing method, it trains teachers to operate in a standardized manner, reduces the operation error rate, and reduces equipment failures and inconvenience in use caused by improper operations.

[0029] 2: The transmitting device of the present invention is set to an intelligent sleep mode, which can reduce power consumption and improve the battery life. Compared with traditional products, the battery life is significantly improved, and at the same time, energy consumption is reduced.

[0030] 3: The system of the present invention supports the management of device unique identifiers. The MAC address of each transmitting device is bound to the teacher's account, supporting teachers to use it quickly across classrooms, improving the flexibility and convenience of device use. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the drawings:

[0032] Figure 1 is a schematic diagram of the system architecture of the present invention;

[0033] Figure 2 is a pairing flow chart of the present invention;

[0034] In the figure: 11, microphone; 12, first wireless module; 13, first main control module; 14, magnet; 21, speaker; 22, second wireless module; 23, second main control module; 24, Hall switch. Detailed implementation manners

[0035] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0036] Embodiment 1

[0037] As Figure 1-2 shown, the present invention provides a wireless microphone sound reinforcement system based on a Hall switch, including:

[0038] Wireless microphone transmitting device: including a microphone 11, a first wireless module 12, a first main control module 13, and a magnet 14;

[0039] Wireless microphone receiving device: including a speaker 21, a second wireless module 22, a second main control module 23, and a Hall switch 24;

[0040] Pairing control system: When the distance between the magnet 14 and the Hall switch 24 is ≤ 5 cm, pairing is triggered, and the wireless microphone receiving device screens the wireless microphone transmitting device through a dynamic RSSI threshold.

[0041] Furthermore, the calculation formula for the dynamic RSSI threshold is:

[0042] Threshold = α·P base +β·In(d max );

[0043] where P base is the reference signal strength, d max is the preset maximum connection distance, and α and β are environmental adaptation coefficients.

[0044] The teacher brings the magnet 14 of the wireless microphone transmitting device close to the Hall switch 24 of the wireless microphone receiving device, and a signal is triggered when the magnetic field strength ≥ 50 mT. The wireless microphone receiving device calculates the threshold through the formula. For example: in the classroom environment, α = 0.7, in the corridor environment, β = 0.3, P base = -40 dBm, d max = 1 m, and the transmitting device with RSSI ≥ -65 dBm is screened.

[0045] Furthermore, the pairing process includes:

[0046] The wireless microphone receiving device detects a signal triggered by the Hall switch 24;

[0047] The first main control module 23 activates the second wireless module 22 to scan for surrounding transmitting devices;

[0048] Filter out transmitting devices with an RSSI value ≥ -65 dBm for connection.

[0049] The wireless microphone receiving device scans all 2.4 GHz channels within 2 seconds and records the RSSI values. It preferentially connects to the transmitting device with the highest RSSI value and performs an AES-128 encrypted handshake.

[0050] Furthermore, the system supports device uniqueness identification management. The MAC address of each wireless microphone transmitting device is bound to the teacher's account, and the wireless microphone receiving device can store 10 groups of binding relationships.

[0051] The teacher binds the MAC address of the wireless microphone transmitting device to the account through the mobile phone APP, and the wireless microphone receiving device stores 10 groups of binding relationships. After touch triggering, it preferentially connects to the most recently used transmitting device, and the switching response time ≤ 200 ms.

[0052] Furthermore, the system supports multi-classroom scenario management. The wireless microphone receiving device realizes cross-classroom roaming through IP address binding.

[0053] The wireless microphone receiving device obtains an IP address through DHCP. When the teacher carries the wireless microphone transmitting device into another classroom, it automatically connects to the new receiving device, and the audio interruption time during the switching process ≤ 100 ms.

[0054] Furthermore, the wireless microphone receiving device is equipped with a dual power supply module 25, supporting automatic switching between PoE power supply and lithium battery.

[0055] When PoE power supply is normal, PoE is preferentially used; after power failure, it automatically switches to the lithium battery, and the battery life ≥ 15 hours.

[0056] Furthermore, the wireless microphone transmitting device is set to an intelligent sleep mode. When the microphone 11 detects a silent signal for 30 seconds, it enters the deep sleep state.

[0057] Sleep trigger: After the microphone 11 detects a silent signal for 30 seconds, the first main control module 13 controls the first wireless module 12 to enter the deep sleep state, and the current drops to 5 μA.

[0058] Wake-up response: After detecting a sound signal, it resumes the working state within 50 ms.

[0059] Specifically, the usage process of the present invention:

[0060] S1. Device Initialization: The teacher binds the MAC address of the wireless microphone transmitting device to the personal account through the mobile phone APP. The wireless microphone receiving device is powered on through PoE or a lithium battery. The LED indicator 26 on the wireless microphone receiving device shows blue and waits for pairing.

[0061] S2. Pairing Process: The teacher turns on the power of the wireless microphone transmitting device, brings the magnet 14 close to the Hall switch 24 of the wireless microphone receiving device, and the distance ≤ 5 cm. The wireless microphone receiving device detects the magnetic field trigger signal and starts the second wireless module 22 to scan. Select the transmitting device with RSSI ≥ -65 dBm, and establish a connection through AES-128 encrypted handshake. The LED indicator turns green.

[0062] S3. Teaching Use: The teacher normally uses the microphone. After the voice signal is collected by the microphone 11, it is transmitted to the wireless microphone receiving device through the first wireless module 12. The second main control module 23 processes the signal through the Kalman filter algorithm and drives the speaker 21 to play, and the voice clarity is improved by 40%.

[0063] S4. Cross-Classroom Switching: The teacher carries the wireless microphone transmitting device into another classroom and gets close to the new wireless microphone receiving device to trigger pairing. The wireless microphone receiving device automatically switches through IP address binding, and the audio interruption time ≤ 100 ms. The LED indicator shows green.

[0064] S5. Device Sleep: After teaching, the teacher turns off the power of the wireless microphone transmitting device, or it automatically enters the sleep state after 30 seconds without voice input, and the power consumption ≤ 0.1 mA.

[0065] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A wireless microphone sound reinforcement system based on Hall switch, characterized in that: include: A wireless microphone transmitting device: comprising a microphone head (11), a first wireless module (12), a first main control module (13) and a magnet (14); A wireless microphone receiving device: comprising a speaker (21), a second wireless module (22), a second main control module (23) and a Hall switch (24); Pairing control system: when the distance between the magnet (14) and the Hall switch (24) is less than or equal to 5 cm, pairing is triggered, and the wireless microphone receiving device selects the wireless microphone transmitting device through a dynamic RSSI threshold.

2. A wireless microphone sound reinforcement system based on a Hall switch according to claim 1, characterized in that: The dynamic RSSI threshold calculation formula is: Threshold = α·P base +β·In(d max ); Among them, P base is the reference signal strength, d max is the preset maximum connection distance, and α and β are the environmental adaptation coefficients.

3. The wireless microphone sound reinforcement system based on Hall switch according to claim 1, characterized in that: The pairing process includes: The wireless microphone receiving device detects a trigger signal of the Hall switch (24); The first main control module (23) activates the second wireless module (22) to scan surrounding transmitting devices; Select transmitters with RSSI values ​​≥ -65dBm for connection.

4. The wireless microphone sound reinforcement system based on Hall switch according to claim 1, characterized in that: The system supports unique device identification management. The MAC address of each wireless microphone transmitter is bound to the teacher account, and the wireless microphone receiver can store 10 sets of binding relationships.

5. A wireless microphone sound reinforcement system based on a Hall switch according to claim 4, characterized in that: The system supports multi-classroom scene management, and the wireless microphone receiving device can achieve cross-classroom roaming through IP address binding.

6. The wireless microphone sound reinforcement system based on Hall switch according to claim 1, characterized in that: The wireless microphone receiving device is equipped with a dual power supply module (25) and supports automatic switching between PoE power supply and lithium battery.

7. The wireless microphone sound reinforcement system based on Hall switch according to claim 1, characterized in that: The wireless microphone transmitting device is set to an intelligent sleep mode, and enters a deep sleep state when the microphone (11) detects a silent signal for 30 seconds.

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