Head-mounted wireless communication earphone and working method

Abstract

The invention discloses a head-mounted wireless communication earphone and a working method. A first earmuff is provided with a microphone, a first receiver, a voice communication unit, a data communication unit, an MCU unit, a key unit, a voice data antenna and a wired data interface, and the key unit is provided with an on-off key; the second earmuff is provided with a second receiver, a battery, a power management unit, a satellite positioning and communication unit and a physiological acquisition unit, and the physiological acquisition unit is provided with a wearing self-checking module; the MCU unit is provided with a wireless communication encryption algorithm, the MCU control circuit is connected with the radio frequency transceiver circuit and the audio encoding and decoding circuit, the radio frequency transceiver circuit is connected with the audio encoding and decoding circuit, and the radio frequency transceiver circuit is in communication connection with the satellite positioning and communication unit; the radio frequency transceiving circuit adopts linear spread spectrum modulation, the audio encoding and decoding circuit adopts adaptive dynamic threshold wireless transmission, the radio frequency transceiving circuit and the audio encoding and decoding circuit adopt a time division duplex transmission mode, and the satellite positioning and communication unit is provided with an electronic fence.

Description

Technical Field

[0001] The invention belongs to the technical field of wireless communication earphones, and in particular relates to a head-mounted wireless communication earphone and a working method. Background Art

[0002] In modern rescue equipment, head-mounted wireless emergency communication devices are widely used. Common head-mounted wireless emergency communication devices include head-mounted wireless emergency communication headsets, waist-mounted wireless emergency communication devices, wristband-type wireless emergency communication devices, and aircraft-mounted wireless emergency communication devices. Among them, head-mounted wireless emergency communication headsets have many advantages such as easy and comfortable wearing, strong human-computer interaction, and excellent noise resistance, and have been widely used.

[0003] Since the head-mounted wireless emergency communication headset has a single communication function and can only perform half-duplex or full-duplex voice wireless communication, personnel at rescue sites in jungles, deserts and other remote areas often lose contact due to exceeding the voice communication distance, which increases the difficulty and risk of rescue. The device does not have a data communication function and cannot perform data communication with other users while performing voice communication. Summary of the invention

[0004] The purpose of the present invention is to overcome the problem that the communication distance of a head-mounted wireless emergency communication headset is limited and there is no data communication function, and a head-mounted wireless communication headset and a working method are proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical scheme:

[0006] A head-mounted wireless communication headset comprises an earmuff, wherein the earmuff comprises a first earmuff and a second earmuff, and a neck ring headband group and a head ring cable are connected between the first earmuff and the second earmuff;

[0007] The first earmuff is provided with a transmitter, a first receiver, a voice communication unit, a data communication unit, an MCU unit, a key unit, a voice data antenna and a wired data interface, and the key unit is provided with a power button; the second earmuff is provided with a second receiver, a battery, a power management unit, a satellite positioning and communication unit, and a physiological collection unit, and the physiological collection unit is provided with a wearing self-test module;

[0008] The MCU unit sets a wireless communication encryption algorithm. The MCU unit includes an MCU control circuit. The MCU control circuit is connected to a radio frequency transceiver circuit and an audio codec circuit. The radio frequency transceiver circuit is connected to the audio codec circuit. The radio frequency transceiver circuit is communicatively connected to a satellite positioning and communication unit. The satellite positioning and communication unit is provided with a satellite antenna. The radio frequency transceiver circuit adopts linear spread spectrum modulation, the audio codec circuit adopts adaptive dynamic threshold wireless transmission, the radio frequency transceiver circuit and the audio codec circuit adopt time division duplex transmission mode, and the satellite positioning and communication unit sets an electronic fence. The electronic fence presets a maximum distance for wireless communication.

[0009] Further, the voice communication unit is connected to the microphone, the first receiver, and the second receiver, and the voice communication unit and the data communication unit are connected to the voice and data antennas respectively;

[0010] The MCU unit is interconnected with the battery management unit, the data communication unit, the physiological collection unit, the voice communication unit, the satellite positioning and communication unit, and the key unit through a wired data interface;

[0011] The battery supplies power to the power management unit, and the power management unit supplies power to the satellite positioning and communication unit.

[0012] Furthermore, the wired data interface between the MCU unit and the battery management unit adopts an IO serial port, the wired data interface between the MCU unit and the data communication unit, the physiological acquisition unit, the voice communication unit, and the satellite positioning and communication unit adopts a TTL serial port, and the wired data interface between the key unit and the MCU unit adopts an IO serial port.

[0013] Furthermore, the second earmuff is provided with a battery compartment, and the battery is installed in the battery compartment, and the battery is a lithium battery.

[0014] Furthermore, the neck ring headband set includes a neck ring, with adjustment rods and a head ring bracket installed at both ends of the neck ring, the first earmuff and the second earmuff are clamped on the head ring bracket, the headband is worn on the neck ring, and a pad is arranged on the headband.

[0015] Furthermore, the earmuff is provided with an earmuff shell and an ear pad, the interior of the earmuff shell is filled with sound-absorbing material; the ear pad includes a sound-absorbing inner lining and an outer sheath, and the physiological collection unit is embedded on the ear pad;

[0016] A transmitter rod is connected between the first earmuff and the transmitter, and the transmitter rod is a serpentine tube;

[0017] The key unit is provided with an up key and a down key;

[0018] The physiological acquisition unit uses a photoelectric sensor to detect heart rate and blood oxygen saturation.

[0019] Furthermore, the earmuff shell is made of engineering plastics, and the sound absorbing material is made of polyurethane foam;

[0020] The sound-absorbing lining is made of sponge, and the outer covering is made of protein leather;

[0021] The speaker rod is made of stainless steel, and the outside of the speaker rod is wrapped with a polyethylene heat shrink tubing;

[0022] The voice and data antenna uses a built-in helical antenna, and the satellite antenna uses an active ceramic antenna;

[0023] The key unit is made of silicone rubber.

[0024] Further, the power management unit includes a power protection circuit, an input end of the power protection circuit is connected to the battery, an output end of the power protection circuit is connected to a first input end of the electronic switch circuit, a first output end of the electronic switch circuit is connected to an input end of the filter circuit, an output end of the filter circuit is connected to an output end of the voltage stabilizing circuit, an output end of the voltage stabilizing circuit is connected to power ends of the MCU unit, the voice communication unit, the data communication unit, and the physiological acquisition unit, a reverse connection detection end of the MCU unit is connected to a second input end of the electronic switch circuit, and a second output end of the electronic switch circuit is connected to a power end of the satellite positioning and communication unit;

[0025] The physiological acquisition unit is connected to the MCU control circuit;

[0026] The satellite positioning and communication unit comprises an RDSS module and an RNSS module, and the RDSS module and the RNSS module are respectively connected to the satellite antenna.

[0027] A working method of a head-mounted wireless communication headset, using the head-mounted wireless communication headset, setting the current channel and volume parameters through a key unit, and after the setting is completed, communication between the head-mounted wireless headsets is carried out, and when the headset presses the power button, the current channel value and volume value are read from the memory to enter the working mode;

[0028] After entering the working mode, the current location information is obtained through satellite positioning. After the physiological acquisition unit completes the self-test, it broadcasts the self-test results by voice, obtains the current physiological state information, and reports the current channel, volume, positioning information and physiological information to the MCU unit;

[0029] When the MCU unit of the current headset detects a voice signal in the microphone through the voice communication unit, the MCU unit determines the distance between the current headset and other headsets;

[0030] If the distance does not exceed the preset maximum distance of wireless communication, a wireless call is made;

[0031] If the distance exceeds the preset maximum distance of wireless communication, the current headset converts the voice into text through the audio codec circuit and sends it through the RF transceiver circuit through a short message. The other headsets receive the short message through the RF transceiver circuit and parse and play the short message using the audio codec circuit.

[0032] Furthermore, the reverse connection detection terminal of the MCU unit and the second input terminal of the electronic switch circuit perform a power detection of the switch control signal, and the power is voice broadcasted through the receiver;

[0033] The physiological collection unit detects the heart rate and blood oxygen saturation through the red light and infrared LED of the photoelectric sensor. The detection data of the photoelectric sensor of the physiological collection unit is transmitted to the MCU unit via TTL serial port data. If the detection data of the physiological collection unit self-test is in an abnormal state, the MCU unit controls the voice broadcast prompt;

[0034] The audio codec circuit converts between analog voice signals and digital signals;

[0035] The satellite positioning and communication unit receives frequency signals through the satellite antenna. The RDSS module demodulates and solves the frequency signals to obtain navigation message data, and sends the navigation message data through the antenna feed source to complete the entry application. The RNSS module demodulates and solves the frequency signals to obtain positioning data.

[0036] The battery voltage is stepped down and output through the first output terminal of the electronic switch circuit via the filter circuit and the voltage stabilizing circuit, and the battery voltage is stepped up and output through the second output terminal of the electronic switch circuit.

[0037] Compared with the prior art, the present invention has the following beneficial technical effects:

[0038] The head-mounted wireless communication headset proposed by the present invention is used as a head-mounted emergency communication device. It adopts linear spread spectrum modulation to achieve long-distance anti-interference. Compared with spread spectrum technologies such as WIFi and ZigBee, it uses bandwidth in exchange for sensitivity with maximum efficiency, and has the advantages of high sensitivity, long communication distance, strong communication anti-interference ability, and low power consumption. A completely independent communication baseband is adopted, and the encryption algorithm of the MCU unit, such as the AES128 encryption algorithm, is used to realize communication encryption, which is used to protect the confidentiality and integrity of data. The algorithm uses the same key for encryption and decryption, and the communication transmission has extremely high confidentiality. A time-division duplex point-to-multipoint transmission mode is adopted to carry out full-duplex wireless communication for four people at the same time, which can realize 4 people talking at the same time, and the number of receiving ends is unlimited. When two people are talking normally, the third and fourth people are allowed to interrupt in an emergency, which effectively improves the communication capability and is more in line with the usual speaking habits of personnel. It meets the use characteristics and requirements of personnel in daily operations. Adaptive dynamic threshold control wireless transmission is adopted, and the user's hands are liberated through VOX voice activation, without the need for sending and receiving conversion, and calls can be made at any time without affecting the operation. It can accurately detect voice activities and improve the communication effect of the whole machine in different noise environments. It has an electronic fence function. When the electronic fence is turned on, it can judge whether the person exceeds the preset voice communication area through satellite positioning information. If the person does not exceed the area, the voice communication will be turned on for full-duplex voice communication. If the person exceeds the area, the voice communication will be turned off and only satellite communication will be used for communication. It solves the problem that the existing head-mounted wireless communication headset has limited communication distance and no data communication function.

[0039] Furthermore, in order to solve the wireless communication problems at rescue sites in remote areas such as jungles and deserts, it can realize full-duplex voice communication for multiple users within a group within a range of more than 1km, and support centerless self-organizing networks. It has the function of collecting physiological information, supports the rapid positioning and satellite communication capabilities of Beidou and GPS satellite global positioning systems, has wireless data transmission function, and can send or receive data such as personnel physiological information, battery power, voice communication status, etc. through data transmission or short message form. It has the characteristics of wide communication coverage, strong communication capability, small size, and light weight.

[0040] Furthermore, it is suitable for emergency rescue operations in complex environments such as jungles and deserts. It is easy to operate and does not require professional training. The overall appearance of the machine adopts an integrated design, and the internal component units are compact, highly integrated, durable, stable and reliable, meeting the requirements for use in complex environments. Each component adopts a modular design for easy use and replacement of consumables. It is small in size, light in weight and easy to carry. It has a low production cost and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0042] Figure 1 The present invention is a schematic diagram of a head-mounted wireless emergency communication headset.

[0043] Figure 2 The present invention is a schematic diagram of a headband of a head-mounted wireless emergency communication headset.

[0044] Figure 3 The present invention is a schematic diagram of an earmuff of a head-mounted wireless emergency communication headset.

[0045] Figure 4 The figure is a schematic diagram of a left earmuff of a head-mounted wireless emergency communication headset according to an embodiment of the present invention.

[0046] Figure 5 The figure is a schematic diagram of a right earmuff of a head-mounted wireless emergency communication headset according to an embodiment of the present invention.

[0047] Figure 6 The figure is a schematic diagram of an ear pad of a head-mounted wireless emergency communication headset according to an embodiment of the present invention.

[0048] FIG. 7( a ) is a front view of an earmuff cavity of a head-mounted wireless emergency communication headset in an embodiment of the present invention.

[0049] FIG7( b ) is a side view of the earmuff cavity of a head-mounted wireless emergency communication headset in an embodiment of the present invention.

[0050] Figure 8 The present invention is a schematic diagram of the installation of a physiological collection unit of a head-mounted wireless emergency communication headset.

[0051] Fig. 9 The present invention is a schematic diagram of a microphone of a head-mounted wireless emergency communication headset.

[0052] Fig.10 The present invention is a schematic diagram of a voice data antenna of a head-mounted wireless emergency communication headset.

[0053] Fig.11 The present invention is a schematic diagram of the working principle of a head-mounted wireless emergency communication headset.

[0054] Fig.12 The present invention provides a block diagram of the internal system of the MCU unit circuit of a head-mounted wireless emergency communication headset.

[0055] Fig.13 The present invention provides a block diagram of a radio frequency transceiver circuit for a head-mounted wireless emergency communication headset.

[0056] Fig.14 The present invention provides a block diagram of an audio codec circuit for a head-mounted wireless emergency communication headset.

[0057] Fig.15 The present invention is a RDSS principle block diagram of a head-mounted wireless emergency communication headset.

[0058] Fig.16 The present invention is a RNSS principle block diagram of a head-mounted wireless emergency communication headset.

[0059] Fig.17 The present invention provides a block diagram of a power management unit of a head-mounted wireless emergency communication headset.

[0060] Fig.18 The present invention provides a functional block diagram of the MCU unit control software of a head-mounted wireless emergency communication headset.

[0061] Fig.19 The present invention discloses a control flow chart of the MCU unit control software of a head-mounted wireless emergency communication headset.

[0062] Among them, 1 is the first earmuff, 11 is the first receiver, 12 is the voice data antenna, 13 is the button unit, 14 is the physiological collection unit, 2 is the second earmuff, 21 is the second receiver, 3 is the neck loop headband group, 31 is the neck loop, 32 is the headband, 33 is the pad, 34 is the head loop bracket, 4 is the transmitter, 41 is the transmitter rod, 5 is the head loop cable, and 6 is the ear pad. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0064] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0065] Embodiment 1

[0066] See also Figure 1 , Figure 2 , Figure 3 A head-mounted wireless communication headset comprises an earmuff, wherein the earmuff comprises a first earmuff 1 and a second earmuff 2, wherein a neck ring headband set 3 and a head ring cable 5 are connected between the first earmuff 1 and the second earmuff 2;

[0067] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 The first earmuff 1 is provided with a microphone 4, a first receiver 11, a voice communication unit, a data communication unit, an MCU unit, a key unit 13, a voice data antenna 12 and a wired data interface, and the key unit 13 is provided with a power button; see Figure 1 , Figure 2 , Figure 3 , Figure 5 The second earmuff 2 is provided with a second receiver 21, a battery, a power management unit, a satellite positioning and communication unit, and a physiological collection unit 14, and the physiological collection unit is provided with a wearing self-checking module;

[0068] See also Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 The MCU unit sets a wireless communication encryption algorithm. The MCU unit includes an MCU control circuit. The MCU control circuit is connected to the RF transceiver circuit and the audio codec circuit. The RF transceiver circuit is connected to the audio codec circuit. The RF transceiver circuit is connected to the satellite positioning and communication unit for communication. The satellite positioning and communication unit is provided with a satellite antenna. The RF transceiver circuit adopts linear spread spectrum modulation, the audio codec circuit adopts adaptive dynamic threshold wireless transmission, the RF transceiver circuit and the audio codec circuit adopt time division duplex transmission mode, and the satellite positioning and communication unit sets an electronic fence, and the electronic fence presets the maximum distance of wireless communication.

[0069] A head-mounted wireless communication headset provided in this embodiment belongs to the head-worn voice communication device. The voice wireless communication adopts full-duplex communication mode, does not require operation buttons, and the communication distance is more than 1km. Not only can it realize full-duplex voice wireless communication with a preset maximum wireless communication distance of more than 1km of the electronic fence, but it has also significantly improved the voice wireless communication distance and working mode, and has added physiological data collection function, data wireless communication function, satellite positioning and communication function, with voice wireless communication and data communication functions, supports centerless self-organizing network, and can collect human physiological data information in real time. With physiological data collection function, it can provide users with personnel physiological information and status in real time, which is convenient for rescue and unified dispatch. With data communication function, it can realize data interaction between headset terminals, and can also expand and upgrade the headset function through wireless data transmission, and the difficulty and cost of secondary development are relatively low. With satellite positioning and communication function, it can realize rapid positioning and satellite communication through Beidou and GPS satellite global positioning systems, breaking through the distance limit of voice wireless communication, and effectively improving the communication coverage.

[0070] See also Fig.11 The voice communication unit is connected to the microphone 4, the first receiver 11, and the second receiver 12, and the voice communication unit and the data communication unit are respectively connected to the voice data antenna 12; the MCU unit is interconnected with the battery management unit, the data communication unit, the physiological collection unit, the voice communication unit, the satellite positioning and communication unit, and the key unit 13 through a wired data interface; the battery supplies power to the power management unit, and the power management unit supplies power to the satellite positioning and communication unit.

[0071] The wired data interface between the MCU unit and the battery management unit uses an IO serial port, the wired data interface between the MCU unit and the data communication unit, the physiological collection unit 14, the voice communication unit, and the satellite positioning and communication unit uses a TTL serial port, and the wired data interface between the key unit 13 and the MCU unit uses an IO serial port. The second earmuff 2 is provided with a battery compartment, and the battery is installed in the battery compartment. The battery uses a lithium battery. Figure 2 The neck ring headband set 3 includes a neck ring 31, with adjustment rods and a head ring bracket 34 installed at both ends of the neck ring 31, the first earmuff 1 and the second earmuff 2 are clamped on the head ring bracket 34, the headband 32 is worn on the neck ring 31, and a pad 33 is set on the headband 32.

[0072] See also Figure 1 , Figure 2 , Figure 3 , Figure 6 7(a) and 7(b), the earmuffs are provided with an earmuff shell and an ear pad 6, the interior of the earmuff shell is filled with a sound absorbing material; the ear pad 6 includes a sound absorbing inner lining and an outer sheath, see Figure 8, the physiological collection unit 14 is embedded in the ear pad 6; see Fig. 9 The first earmuff 1 and the microphone 4 are connected with a microphone rod 41, which is a serpentine tube; the key unit 13 is provided with an up key and a down key; the physiological collection unit 14 is a photoelectric sensor for detecting heart rate and blood oxygen saturation. Furthermore, the earmuff shell is made of engineering plastic, the sound absorbing material is polyurethane foam; the sound absorbing lining is sponge, and the outer skin is protein skin; the microphone rod 41 is made of stainless steel, and the outer surface of the microphone rod 41 is wrapped with a polyethylene heat shrink tube; see Fig.10 The voice data antenna 12 uses a built-in spiral antenna, and the satellite antenna uses an active ceramic antenna; the key unit 13 is made of silicone rubber. It has the characteristics of comfortable and simple wearing, convenient operation, rich functions, light weight, and small size. Voice wireless communication and data wireless communication share the voice data antenna built into the first earmuff, and the satellite positioning and communication antenna uses the active ceramic antenna built into the second earmuff. The two antennas are small in size, do not occupy space, have strong human-computer interaction, and have high radiation efficiency and sensitivity.

[0073] See also Fig.17 The power management unit includes a power protection circuit, an input end of the power protection circuit is connected to the battery, an output end of the power protection circuit is connected to a first input end of the electronic switch circuit, a first output end of the electronic switch circuit is connected to an input end of the filter circuit, an output end of the filter circuit is connected to an output end of the voltage stabilizing circuit, an output end of the voltage stabilizing circuit is connected to power ends of the MCU unit, the voice communication unit, the data communication unit, and the physiological acquisition unit, a reverse connection detection end of the MCU unit is connected to a second input end of the electronic switch circuit, and a second output end of the electronic switch circuit is connected to a power end of the satellite positioning and communication unit;

[0074] The physiological acquisition unit is connected to the MCU control circuit;

[0075] The satellite positioning and communication unit comprises an RDSS module and an RNSS module, and the RDSS module and the RNSS module are respectively connected to the satellite antenna.

[0076] The current head-mounted wireless emergency communication headset only has voice wireless communication function, and can only perform short-range half-duplex or full-duplex voice wireless communication, which is not conducive to rescue in jungles, deserts and other remote areas, and frequently causes loss of connection. It also does not have data communication capability, and cannot perform data communication with other users during voice communication. The head-mounted wireless communication headset provided in this embodiment can send or receive data such as personnel physiological information, battery power, voice communication status, etc. through digital transmission or short message form, and the communication distance is extended to the world, which essentially improves the communication capability of rescue equipment.

[0077] Embodiment 2

[0078] See also Fig.18 and Fig.19 , a working method of a head-mounted wireless communication headset, using a head-mounted wireless emergency communication headset described in embodiment 1, a working method of a head-mounted wireless communication headset, using the head-mounted wireless communication headset, setting the current channel and volume parameters through a key unit, and communicating between head-mounted wireless headsets after the setting is completed, when the headset presses the power button, the current channel value and volume value are read from the memory to enter the working mode; after entering the working mode, the current position information is obtained through satellite positioning, the physiological acquisition unit voice broadcasts the self-test result after completing the self-test, and obtains the current physiological state information, and reports the current channel, volume, positioning information and physiological information to the MCU unit; when the MCU unit of the current headset detects a voice signal in the transmitter through the voice communication unit, the MCU unit determines the distance between the current headset and other headsets; if the distance does not exceed the preset maximum distance of wireless communication, a wireless call is made; if the distance exceeds the preset maximum distance of wireless communication, the current headset converts the voice into text through the audio codec circuit and then uses the radio frequency transceiver circuit to send it through a short message, and other headsets receive the short message through the radio frequency transceiver circuit, and use the audio codec circuit to parse and play the short message.

[0079] The reverse connection detection end of the MCU unit and the second input end of the electronic switch circuit perform power detection of the switch control signal, and the power is voice broadcast through the receiver; the physiological acquisition unit detects the heart rate and blood oxygen saturation through the red light and infrared LED of the photoelectric sensor, and the detection data of the photoelectric sensor of the physiological acquisition unit is transmitted to the MCU unit in the form of TTL serial port data. If the detection data of the physiological acquisition unit self-test is in an abnormal state, the voice broadcast prompt is controlled by the MCU unit; the audio codec circuit performs conversion between analog voice signals and digital signals; the satellite positioning and communication unit receives the frequency signal through the satellite antenna, and the RDSS module demodulates and solves the frequency signal to obtain the navigation message data, and the navigation message data is sent by the antenna feed source to complete the entry application; the RNSS module demodulates and solves the frequency signal to obtain the positioning data; the battery voltage is stepped down and output through the first output end of the electronic switch circuit through the filter circuit and the voltage stabilizing circuit, and the battery voltage is stepped up and output through the second output end of the electronic switch circuit.

[0080] Embodiment 3

[0081] A head-mounted wireless communication headset is composed of a neck ring headband group, left and right earmuffs, a microphone group, an antenna, etc. The overall effect diagram of the head-mounted wireless emergency communication headset is shown in Figure 1 .

[0082] The neck ring headband assembly consists of a neck ring, an adjustment rod and a bracket, and a neck ring pad. Figure 2As shown, the neck ring material is ICr18Ni19, Φ2mm diameter stainless steel wire, which has the characteristics of strong weather resistance and moderate rigidity. The size is designed according to the standard head shape of GJB 1564A-2012 "General Specification for Flight Protection Helmets". The head ring clamping force is kept within 10N. After wearing verification on different head shapes of large, medium and small, the clamping force is moderate and comfortable to wear, which solves the problem of discomfort after long-term wearing and improves the wearing comfort. It is easy to adjust, comfortable to wear and light in weight.

[0083] The two ends of the neck ring are equipped with plastic adjustment rods and brackets, which can realize the rapid disassembly and replacement of the neck ring group and the rapid change of the earphone shape. The pad is mainly processed by sponge pad, which has good deformation elasticity, beautiful appearance, convenient wearing and disassembly, and reliable performance.

[0084] The earmuffs are mainly composed of an earmuff shell, a receiver, a sound-absorbing sponge, an ear pad and a neck loop cable. The left and right earmuffs are connected to the neck loop headband. When worn, they fit the human ears and face well, have a wide range of adaptability, and are very comfortable to wear. Figure 3 .

[0085] The left earmuff group mainly consists of the left earmuff, transmitter and receiver, voice data antenna, PTT switch, audio interface, buttons, and ear pads. Figure 4 .

[0086] The left earmuff is designed with three control buttons, including the power on / off button, up and down buttons, which can complete the functions of power on / off, channel, volume and mode selection. When the buttons are operated, the corresponding status information is broadcast in the headset, which is simple and convenient to operate. The buttons are made of silicone rubber, which is resistant to aging and not easy to break, and are made of molds.

[0087] The right earmuff set is mainly composed of the right earmuff, receiver, PCBA, battery compartment, power switch, satellite positioning and communication module, and ear pad. Figure 5 .

[0088] The main material of the earmuff shell is engineering plastic, and the earmuff components are pressed by molds. They have the advantages of high strength, good environmental adaptability and good noise isolation performance. The earmuff wall thickness and cavity design combine the acoustic performance, and the inside of the earmuff shell is filled with porous sound-absorbing materials, so that the earmuffs have a certain isolation effect on noise.

[0089] The outer skin of the ear pad is protein leather, which has good corrosion resistance and extrusion deformation properties. The lining material is sound-absorbing sponge, which is light in weight. The ear pad fits the human ear tightly, making it more comfortable to wear. It is soft and breathable, and has excellent sealing and sound insulation performance. See the ear pad appearance diagram Figure 6 .

[0090] The earmuff cavity structure comprehensively considers the requirements of noise protection, weight, acoustic performance and user wearing, adopts a large ear cavity design, and uses polyurethane foam as a sound-absorbing material, which can effectively allow sound waves to enter the sound-absorbing material without reflection and quickly consume its sound energy, effectively isolating noise and achieving a good noise isolation effect. The appearance of the earmuff cavity is shown in Figure 7 (a) and Figure 7 (b).

[0091] In order to make the device highly integrated, with fewer connected components, and to ensure the accuracy of physiological information collection, the physiological collection sensor was simulated and tested at different locations for many times, and it was finally determined that the physiological collection unit should be embedded in the corresponding position of the ear pad. Figure 8 After the physiological acquisition unit is encapsulated with ABS, the power supply line and signal line are led out with wires and connected to the MCU control circuit. The physiological information is prompted by short messages and self-test voice.

[0092] In terms of accuracy, the measurement accuracy is related to the wearing position. The pulse signal levels at different measuring sites vary greatly. Stronger pulse signals can be obtained at places with flat skin such as fingertips or near the cheek earlobes. The physiological acquisition module is designed to be embedded in the ear pad and in contact with the cheek earlobes, ensuring the accuracy of the collected data without affecting the wearing comfort. The module detects heart rate and blood oxygen saturation through the sensor red light and infrared LED. It is designed with a wearing self-check function to detect the correctness of wearing. A variety of detection methods are set in the program design. If the detection data is in an abnormal state, it can be prompted through voice broadcast and other methods to complete the self-check function.

[0093] The microphone set is mainly composed of a microphone, a microphone coil, etc. Fig. 9 The transmitter and plug shell are mainly made of ABS injection molding, and the transmitter snake tube is made of stainless steel and wrapped with a polyethylene heat shrink tube.

[0094] The microphone is connected by a metal snake tube, which is convenient for microphone adjustment, beautiful appearance and reliable structure. When wearing it, the bending degree of the microphone rod can be adjusted arbitrarily to be placed 5mm to 10mm away from the mouth, which can adapt to different face shapes.

[0095] The voice data antenna is a built-in helical antenna installed in the left earmuff of the device. The effective length is 30mm. The antenna is small in size and is directly welded on the unit board. Fig.10 .

[0096] From the perspective of physical composition, the head-mounted wireless emergency communication headset is mainly composed of a left earmuff, a right earmuff, a neck ring headband set, and a charger. The left earmuff is positioned as the main control unit, and all operations and settings are performed on this left earmuff.

[0097] From the perspective of functional composition, the head-mounted wireless emergency communication headset is mainly composed of a voice communication unit, a data communication unit, a power management unit, an MCU unit, a button unit, a satellite positioning and communication unit, a physiological collection unit, a voice data antenna, a wired data interface, etc.

[0098] The voice communication unit, data communication unit, MCU unit, button unit, voice data antenna, and wired data interface are designed in the left earmuff. The power management unit, satellite positioning and communication unit, and physiological collection unit are designed in the right earmuff. The communication and control interconnection between the left and right earmuffs are realized by the headband cable. The left and right earmuffs are installed on the headband bracket in the form of snaps. When the battery is low, it can be taken out from the battery compartment of the right earmuff, and the 18650 lithium battery can be charged using a charger.

[0099] The left earmuff mainly includes: a transmitter, a receiver, an MCU control circuit, a data communication unit, a key unit, a voice communication unit, a voice data antenna, and a wired data interface socket;

[0100] The right earmuff mainly includes: receiver, 18650 lithium battery, power management unit, satellite positioning and communication unit, physiological collection unit, satellite antenna;

[0101] Accessories include: 18650 lithium battery, charger.

[0102] The working principle of the head-mounted wireless emergency communication headset is detailed in Fig.11 .

[0103] The power management unit can stabilize and filter the power supply of the 18650 lithium battery to 3.3V and send it to the MCU unit, data communication unit, voice communication unit, and physiological acquisition unit. The power is processed separately and then sent to the vital signs monitoring component, Beidou positioning module, and voice communication component for power supply. At the same time, it can boost the power supply to 5V to power the satellite positioning and communication units.

[0104] The MCU unit conducts data communication and status control with the data communication unit, physiological collection unit, voice communication unit, and satellite positioning and communication unit through the TTL serial port, and communicates with the key unit and power management unit through the IO port to realize the power on and off control of the head-mounted wireless emergency communication headset, voice communication channel and receiver volume adjustment.

[0105] The key unit can adjust the channel and receiving volume of the voice communication unit through key operation by the MCU unit, and can turn on and off the head-mounted wireless emergency communication headset through key operation.

[0106] The data communication unit is connected to the built-in voice data antenna and can communicate data with the MCU unit through the TTL serial port to wirelessly send and receive personnel location information, physiological information and other data.

[0107] The voice communication unit is connected to the microphone, the receiver and the built-in voice data antenna. The microphone converts the sound signal into an electrical signal as the input of the voice communication unit. The receiver, as the output of the voice communication unit, converts the electrical signal into a sound signal for people to listen to. The voice communication unit can communicate data with the MCU unit through the TTL serial port, and the MCU unit can then realize the synthesis and processing of the voice signal, as well as the algorithm control of the voice communication status and voice encryption. The voice communication unit and the built-in voice antenna can realize voice communication networking and full-duplex voice wireless communication within the group.

[0108] The satellite positioning and communication unit and satellite antenna are integrated into the design. The satellite positioning and communication unit can communicate data with the MCU unit through the TTL serial port to complete satellite positioning. It can also share location information, physiological data, voice communication channels, volume, battery power and other information between personnel through satellite communication.

[0109] The physiological acquisition unit can communicate the collected physiological data of personnel with the MCU unit through the TTL serial port, and indirectly realize data exchange with the data communication unit and the satellite positioning and communication unit.

[0110] The MCU unit uses the domestically produced HC32F460 series high-speed processor, which has low power consumption and low voltage. The main frequency of the chip is not less than 200MIPS. The MCU circuit is the control core of the product, mainly responsible for multi-time slot voice information compression, decompression, frame data transmission / reception, multi-channel voice data multiplexing synthesis, and the processing, distribution and coordination of a large amount of information such as related control information, data information, and external data interface. In order to reduce the complexity of the hardware circuit, the processing of multi-channel voice data is completed by software. The internal system block diagram of the MCU circuit is shown in Fig.12 .

[0111] The RF transceiver unit uses a low-voltage professional communication chip with a spread spectrum function in the 900MHz frequency band, which has certain anti-interference and confidentiality performance. The chip has a wide operating frequency range and includes RF transceiver and transceiver conversion, modulation and demodulation, frequency synthesis, programmable transmission power control, SPI serial data communication and other functions, thereby realizing RF modulation and demodulation. Only a crystal oscillator and a small number of filter components need to be connected externally. All parameters including the channel transmission frequency can be configured through the chip's internal configuration register using the SPI serial line. The processor in the product can be flexibly configured according to the channel modulation method and transmission rate. See the block diagram of the RF transceiver circuit. Fig.13 .

[0112] The audio codec unit mainly converts the analog voice signal of the personnel into a digital signal that is easy to transmit and store, and the receiving end restores the digital signal to an analog signal. The circuit chip has selected a professional chip with multiple input and output and expandable audio power. The chip ADC and DAC signal-to-noise ratio can reach 100dB. The data rate of 8K~192Kbit / s can be selected as needed. All parameters including gain control, filter selection, A / D, D / A conversion, etc. can be configured through the configuration register inside the chip using the IIC serial line. The voice output is output by the HPL and LOL ports of the audio codec chip. The audio output amplitude is adjustable so that the receiver audio output is not less than 90dB. See the structural diagram of the audio codec circuit Fig.14 .

[0113] The satellite positioning and communication unit adopts the design concept of supporting multi-mode satellite navigation system, and is compatible with civil Beidou and GPS satellite positioning. It improves service accuracy, enhances signal stability, and expands application areas without significantly increasing costs. In an emergency, it can use the Beidou satellite navigation system to achieve satellite communication, support the reception and positioning solution of Beidou RNSS multi-frequency signals, support the reception and positioning solution of BDSBAS satellite-based augmentation signals, and support pseudo-range differential RTD positioning; support the reception of Beidou S1I and S1Q frequency signals, and the transmission of Lf0~Lf3 frequencies, to achieve positioning reports, message communications, command and other functions; support the reception of Beidou global short message B2b frequency signals and the transmission of Lf4 frequency signals, to achieve positioning reports, message communications, global search and rescue and other functions.

[0114] The satellite positioning and communication unit integrates the baseband board and antenna into an integrated design, which is installed in the right earmuff without exposing the antenna. The transceiver antenna receives all the S-frequency and B1-frequency points of the Beidou-2 satellites in the field of view, and transmits the modulated Beidou satellite uplink L-frequency point inbound signal through the antenna feed source; the RDSS module completes the filtering and low-noise amplification of the Beidou satellite downlink S-frequency point signal, and then completes the demodulation and solution of the Beidou satellite downlink S-frequency point signal according to the Beidou satellite signal in and out protocol to obtain the navigation message data; and modulates the Beidou satellite uplink L-frequency point inbound signal, filters it, amplifies it, and then transmits it through the L-frequency point antenna feed source to complete the inbound application; the RNSS module completes the filtering and low-noise amplification of the Beidou satellite downlink B1 frequency point signal, and then demodulates and solves it to obtain the positioning data.

[0115] RDSS principle block diagram Fig.15 , RNSS principle block diagram see Fig.16 .

[0116] The physiological acquisition unit uses a photoelectric sensor. The sensor and circuit board are integrated into a small module. The sensor red light and infrared LED are used to detect heart rate and blood oxygen saturation. The detection data is sent to the MCU unit in the form of TTL serial port data. The physiological acquisition unit is designed with a wearing self-test function to detect the correctness of wearing. A variety of detection methods are set in the software design. If the detection data is in an abnormal state, the MCU unit can be used to control voice broadcasts and other methods to complete the self-test function.

[0117] The power management unit has anti-reverse connection measures, which are sent to the electronic switch circuit and the operation button through the MCU unit to realize power-on control. After passing through the filter circuits of their respective paths, the processed DC3.7V is stabilized to 3.3V and sent to the MCU unit, voice communication unit, data communication unit, physiological collection unit, Beidou positioning unit, physiological collection unit, and the processed DC3.7V is boosted and stabilized to 5V and sent to the satellite positioning and communication unit and the satellite antenna for power supply. The power management unit has the function of detecting the current power, and can make voice broadcasts through the receiver under the control of the MCU unit. The block diagram of the power management unit is as follows Fig.17 shown.

[0118] The control software of the MCU unit is written in Keil to complete the control of the head-mounted wireless emergency communication headset and realize the wireless call between the head-mounted wireless emergency communication headsets. The main functions realized by the main control software include satellite positioning function, physiological detection function, data communication function, wireless call function, voice recognition function, short message function, channel volume setting function, etc. The functional block diagram is shown in Fig.18 . Control software control flow chart see Fig.19 .

[0119] When the headset is powered on, the current channel value and volume value are read from the memory.

[0120] After entering the working mode, the current location information is obtained through the satellite positioning function. After the physiological detection module completes the self-test, the self-test results are broadcast by voice, and the current physiological status information is obtained. The current channel, volume, positioning information, and physiological information are reported through the data communication function.

[0121] When a voice signal is detected, the distance between this device and other devices is determined. When the distance exceeds the maximum distance of wireless communication, the voice is converted into text through the voice recognition function, and then sent out through the short message function. When the device receives the short message, it parses and plays it.

[0122] The current channel and volume parameters can be set by pressing buttons. After the settings are completed, the communication between the head-mounted wireless emergency communication headset and the headset can be realized.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit its protection scope. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that after reading the present invention, those skilled in the art can still make various changes, modifications or equivalent substitutions to the specific implementation methods of the invention, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the invention.

Claims

1. A head-mounted wireless communication headset, characterized in that: The earmuffs include a first earmuff (1) and a second earmuff (2), and a neck ring headband group (3) and a head ring cable (5) are connected between the first earmuff (1) and the second earmuff (2); The first earmuff (1) is provided with a transmitter (4), a first receiver (11), a voice communication unit, a data communication unit, an MCU unit, a key unit (13), a voice data antenna (12) and a wired data interface, and the key unit (13) is provided with a power button; the second earmuff (2) is provided with a second receiver (21), a battery, a power management unit, a satellite positioning and communication unit, and a physiological collection unit (14), and the physiological collection unit is provided with a wearing self-checking module; The MCU unit sets a wireless communication encryption algorithm. The MCU unit includes an MCU control circuit. The MCU control circuit is connected to a radio frequency transceiver circuit and an audio codec circuit. The radio frequency transceiver circuit is connected to the audio codec circuit. The radio frequency transceiver circuit is communicatively connected to a satellite positioning and communication unit. The satellite positioning and communication unit is provided with a satellite antenna. The radio frequency transceiver circuit adopts linear spread spectrum modulation, the audio codec circuit adopts adaptive dynamic threshold wireless transmission, the radio frequency transceiver circuit and the audio codec circuit adopt time division duplex transmission mode, and the satellite positioning and communication unit sets an electronic fence. The electronic fence presets a maximum distance for wireless communication.

2. A head-mounted wireless communication headset according to claim 1, characterized in that: The voice communication unit is connected to the transmitter (4), the first receiver (11), and the second receiver (12); the voice communication unit and the data communication unit are respectively connected to the voice data antenna (12); The MCU unit is interconnected with the battery management unit, the data communication unit, the physiological collection unit, the voice communication unit, the satellite positioning and communication unit, and the key unit (13) via a wired data interface; The battery supplies power to the power management unit, and the power management unit supplies power to the satellite positioning and communication unit.

3. A head-mounted wireless communication headset according to claim 2, characterized in that: The wired data interface between the MCU unit and the battery management unit adopts an IO serial port, the wired data interface between the MCU unit and the data communication unit, the physiological collection unit (14), the voice communication unit, and the satellite positioning and communication unit adopts a TTL serial port, and the wired data interface between the key unit (13) and the MCU unit adopts an IO serial port.

4. The head-mounted wireless communication headset according to claim 1, characterized in that: The second earmuff (2) is provided with a battery compartment, in which a battery is installed, and the battery is a lithium battery.

5. The head-mounted wireless communication headset according to claim 1, characterized in that: The neck ring headband set (3) comprises a neck ring (31), an adjustment rod and a head ring bracket (34) are mounted at both ends of the neck ring (31), a first earmuff (1) and a second earmuff (2) are clamped on the head ring bracket (34), a headband (32) is worn on the neck ring (31), and a protective pad (33) is arranged on the headband (32).

6. The head-mounted wireless communication headset according to claim 1, characterized in that: The earmuff is provided with an earmuff shell and an ear pad (6), the interior of the earmuff shell is filled with sound-absorbing material; the ear pad (6) comprises a sound-absorbing inner lining and an outer sheath, and a physiological collection unit (14) is embedded on the ear pad (6); A transmitter rod (41) is connected between the first earmuff (1) and the transmitter (4), and the transmitter rod (41) is a serpentine tube; The key unit (13) is provided with an up key and a down key; The physiological acquisition unit (14) uses a photoelectric sensor to detect heart rate and blood oxygen saturation.

7. A head-mounted wireless communication headset according to claim 6, characterized in that: The earmuff shell is made of engineering plastic, and the sound-absorbing material is polyurethane foam; The sound-absorbing lining is made of sponge, and the outer covering is made of protein leather; The speaker rod (41) is made of stainless steel, and the outside of the speaker rod (41) is wrapped with a polyethylene heat shrink tubing; The voice data antenna (12) adopts a built-in helical antenna, and the satellite antenna adopts an active ceramic antenna; The key unit (13) is made of silicon rubber.

8. The head-mounted wireless communication headset according to claim 1, characterized in that: The power management unit includes a power protection circuit, an input end of the power protection circuit is connected to a battery, an output end of the power protection circuit is connected to a first input end of an electronic switch circuit, a first output end of the electronic switch circuit is connected to an input end of a filter circuit, an output end of the filter circuit is connected to an output end of a voltage stabilizing circuit, an output end of the voltage stabilizing circuit is connected to power ends of an MCU unit, a voice communication unit, a data communication unit, and a physiological acquisition unit, a reverse connection detection end of the MCU unit is connected to a second input end of the electronic switch circuit, and a second output end of the electronic switch circuit is connected to a power end of a satellite positioning and communication unit; The physiological acquisition unit is connected to the MCU control circuit; The satellite positioning and communication unit comprises an RDSS module and an RNSS module, and the RDSS module and the RNSS module are respectively connected to the satellite antenna.

9. A method for operating a head-mounted wireless communication headset, using a head-mounted wireless communication headset as claimed in any one of claims 1 to 8, characterized in that: The current channel and volume parameters are set through the key unit. After the settings are completed, the wireless headsets communicate with each other. When the headset presses the power button, the current channel value and volume value are read from the memory to enter the working mode. After entering the working mode, the current location information is obtained through satellite positioning. After the physiological acquisition unit completes the self-test, it broadcasts the self-test results by voice, obtains the current physiological state information, and reports the current channel, volume, positioning information and physiological information to the MCU unit; When the MCU unit of the current headset detects a voice signal in the microphone through the voice communication unit, the MCU unit determines the distance between the current headset and other headsets; If the distance does not exceed the preset maximum distance of wireless communication, a wireless call is made; If the distance exceeds the preset maximum distance of wireless communication, the current headset converts the voice into text through the audio codec circuit and sends it through the RF transceiver circuit through a short message. The other headsets receive the short message through the RF transceiver circuit and parse and play the short message using the audio codec circuit.

10. The working method of a head-mounted wireless communication headset according to claim 9, characterized in that: The reverse connection detection terminal of the MCU unit and the second input terminal of the electronic switch circuit detect the quantity of the switch control signal, and the quantity is voice broadcasted through the receiver; The physiological collection unit detects the heart rate and blood oxygen saturation through the red light and infrared LED of the photoelectric sensor. The detection data of the photoelectric sensor of the physiological collection unit is transmitted to the MCU unit via TTL serial port data. If the detection data of the physiological collection unit self-test is in an abnormal state, the MCU unit controls the voice broadcast prompt; The audio codec circuit converts between analog voice signals and digital signals; The satellite positioning and communication unit receives the frequency signal through the satellite antenna. The RDSS module demodulates and solves the frequency signal to obtain the navigation message data, and sends the navigation message data through the antenna feed source to complete the entry application. The RNSS module demodulates and solves the frequency signal to obtain positioning data; The battery voltage is stepped down and output through the first output terminal of the electronic switch circuit via the filter circuit and the voltage stabilizing circuit, and the battery voltage is stepped up and output through the second output terminal of the electronic switch circuit.

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