WO2021082540A1 - 一种音频接收装置、无线监听系统及信号收发终端 - Google Patents

一种音频接收装置、无线监听系统及信号收发终端 Download PDF

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Publication number
WO2021082540A1
WO2021082540A1 PCT/CN2020/103306 CN2020103306W WO2021082540A1 WO 2021082540 A1 WO2021082540 A1 WO 2021082540A1 CN 2020103306 W CN2020103306 W CN 2020103306W WO 2021082540 A1 WO2021082540 A1 WO 2021082540A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
signal
transceiving
receiving device
audio
Prior art date
Application number
PCT/CN2020/103306
Other languages
English (en)
French (fr)
Inventor
曾浩军
李卫
Original Assignee
深圳市伏荣科技开发有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201921863809.1U external-priority patent/CN210670042U/zh
Priority claimed from CN201921863695.0U external-priority patent/CN210668699U/zh
Priority claimed from CN201921867043.4U external-priority patent/CN210490871U/zh
Application filed by 深圳市伏荣科技开发有限公司 filed Critical 深圳市伏荣科技开发有限公司
Publication of WO2021082540A1 publication Critical patent/WO2021082540A1/zh

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits

Definitions

  • This application relates to the field of wireless signal transmission technology, and in particular to an audio receiving device, a signal transceiving terminal, and a wireless monitoring system.
  • a wireless monitoring system usually includes a transmitter and a receiver.
  • the receiver is used to wear on the user, receive signals and provide audio information to the user through an external earphone, so that the user can perform or speak according to the audio information heard.
  • the transmitter is a relatively large device, which is used to transmit the collected audio signal to the receiver. It needs to be connected to the mains and audio signal lines for normal operation. The ability of the receiver to receive the signal normally is the necessary basis for its work.
  • the receiver will have a rod-shaped or soft rod-shaped antenna.
  • the exposed antenna will directly affect the appearance of the receiver.
  • users often perform a series of physical movements during use, and the external antenna is easily damaged by external forces, which causes damage to the antenna and the receiver cannot be used normally.
  • radio equipment In daily life, radio equipment is usually composed of a transmitter and a receiver.
  • the transmitter processes the data signal (including sound, image, video, and wireless modem data, etc.) that needs to be transmitted, and modulates it to the carrier frequency.
  • the signal is amplified and launched into the air.
  • the receiver receives the wireless carrier signal and demodulates the corresponding data signal from the carrier signal.
  • Both the transmitter and the receiver use antennas to complete the signal transmission with the air.
  • the transmitter transmits the signal to the air through the antenna, with the antenna as the center, following the carrier's own characteristics (here, mainly the carrier frequency) and the angle of the antenna setting, and then transmits it into the air, propagating in a straight line in the air. Dust particles, water molecules, gas molecules, etc. in the air will absorb and scatter electromagnetic waves. Therefore, the electromagnetic waves themselves will decay rapidly in the air. In addition, when encountering obstacles, reflection, refraction or absorption will be formed according to the obstacles. Therefore, there are various electromagnetic wave signals of different sizes, different directions, and different times in the air.
  • the receiver receives the electromagnetic wave signal in the air through the antenna, demodulates and amplifies the output corresponding data information.
  • the current receiver still has the problem of poor signal reception.
  • Engineers will improve and enhance the stability of the signal in various ways, such as improving antenna matching performance, switching antennas with radio frequency switches, and repeating data transmission.
  • these methods still cannot effectively solve the problem of poor signal reception, resulting in incomplete and poor quality demodulated data.
  • One of the objectives of the embodiments of the present application is to provide an audio receiving device, a wireless monitoring system, and a signal transceiving terminal, aiming to solve the problem of poor signal reception of the existing receiver.
  • the present application provides an audio receiving device.
  • the audio receiving device includes a first housing with an inner hollow structure, a PCB board and an antenna module arranged in the first housing, and a connection with the PCB board.
  • the first battery is electrically connected
  • the antenna module is electrically connected to the PCB board for coupling and receiving electromagnetic signals of a specific frequency band
  • the antenna module is arranged on one side of the PCB board close to the housing position.
  • the antenna module includes an antenna group, a main control chip, and a signal processing chip
  • the antenna group includes at least a first antenna and a second antenna
  • the first antenna and the The polarization directions of the second antennas are interleaved with each other
  • the signal processing chip is electrically connected to the main control chip and is in feed connection with the first antenna and the second antenna
  • the signal processing chip is used for interfering with each other.
  • the signals received by the first antenna and the second antenna are amplified and demodulated, and the processed signals are sent to the main control chip.
  • the first antenna and the second antenna are both quarter antennas.
  • the first antenna and the second antenna both include a feeding end and a terminal, and the distance between the feeding end of the first antenna and the feeding end of the second antenna is The distance is equal to 1/4 of the characteristic wavelength of the second antenna.
  • the feeding end of the first antenna is directly opposite to the end of the second antenna, and the polarization directions of the first antenna and the second antenna are staggered.
  • both the first antenna and the second antenna adopt an inverted F antenna.
  • the first housing includes a housing body and a radome
  • the housing body forms an accommodating groove
  • the PCB board and the antenna module are placed in the accommodating groove
  • the radome is made of a material with high wave permeability
  • the antenna module is arranged in the housing body at a position close to the radome.
  • the radome is rectangular, the first antenna and the second antenna are perpendicular to each other, and the first antenna and the second antenna are closely attached to the rectangular radome. The two adjacent edges are set.
  • the first antenna is arranged in a horizontal direction
  • the second antenna is arranged in a vertical direction
  • the first antenna and/or the second antenna are directed toward the radome
  • the middle part is bent.
  • the PCB board is provided with a playback device interface for connecting with a playback device, and the PCB board is also provided with a tuning knob and a frequency modulation button.
  • the button extends out of the first housing.
  • the first battery is a rechargeable first battery
  • a charging interface electrically connected to the first battery is provided on the PCB board.
  • the audio receiving device further includes a fixing structure for fixing the first housing, and the fixing structure is connected to the first housing.
  • the present application provides a wireless monitoring system.
  • the wireless monitoring system includes the audio receiving device as described above.
  • the wireless monitoring system further includes a transmitter switchboard and a transmitter for transmitting signals of a specific channel.
  • the transmitter is electromechanically connected with the transmitter, and the transmitter is connected with the audio receiving device wirelessly.
  • the transmitter includes a second housing, a transmitting antenna and a second battery disposed in the second housing, and the second battery is used to supply energy to the transmitting antenna, so
  • the transmitter transmits a signal of a specific channel through the transmitting antenna
  • the transmitter further includes an audio interface, and the transmitter is electrically connected to the transmitting switchboard through the audio interface.
  • the audio interface includes a locking elastic piece and an unlocking button abutting on the locking elastic piece, and the locking elastic piece locks the transmitter to the corresponding interface of the launching switchboard.
  • the unlock button is used to unlock the transmitter from the locking shrapnel.
  • the present application provides a signal transceiving terminal, including: at least two transceiving antennas; at least two transceiving chips, where the transceiving chips are connected to the transceiving antennas in a one-to-one correspondence; a master chip, a plurality of The transceiving chip is connected to the main control chip in parallel; the main control chip is used to compare the data of a plurality of the transceiving chips, and select and use the data of one of the multiple transceiving chips.
  • the transceiving chip is used to convert the electrical signal from the transceiving antenna into a corresponding analog signal.
  • the signal transceiving terminal further includes an audio decoder and an analog-to-digital converter
  • the audio decoder is connected to the main control chip, and the main control chip is used to send selected data
  • the audio decoder is used to decode and restore data from the main control chip
  • the analog-to-digital converter converts the digital signal decoded and restored by the audio decoder into an analog signal
  • the signal The transceiver terminal also includes an amplifier, which is connected to the analog-to-digital converter.
  • the numbers of the transceiving antenna and the transceiving chip are both two, and the main control chip is used to compare the data of the two transceiving chips; or, the transceiving antenna and the transceiving chip are The number of the transceiver chips is three, and the main control chip is used to compare the data of the three transceiver chips.
  • the transceiving antennas are arranged perpendicular to each other.
  • the audio receiving device and the wireless monitoring system provided by the embodiments of the present application have the beneficial effects that: because the antenna module is arranged inside the first housing of the audio receiving device, the appearance of the audio receiving device can be made more concise and beautiful, while avoiding The antenna module is subjected to external forces due to the user’s body movements during use, which also prevents the antenna module from colliding with other objects during the production, storage and use of the audio receiving device, and avoiding the audio receiving device from being damaged by the antenna module. Cannot be used normally, affecting the performance or speech of the user; at the same time, the antenna module is set on one side of the PCB board and close to the position of the first housing to ensure that the antenna can obtain a good signal during the use of the audio receiving device strength.
  • the signal transceiving terminal includes a first antenna and a second antenna, and the first antenna and the second antenna are connected to the host by the corresponding first transceiving chip and the second transceiving chip.
  • Control chip the main control chip compares the data of the first transceiver chip and the second transceiver chip to decide whether to use the data of the first transceiver chip or the data of the second transceiver chip. Since the data switching is completed by the main control chip, the switching time is even longer. Short, can ensure the continuity of the data before and after the switch, and avoid signal discontinuity caused by data loss.
  • FIG. 2 is a schematic diagram of the internal structure of an audio receiving device provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a transmitter of a wireless monitoring system provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a signal transceiving terminal provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a signal transceiving terminal provided by another embodiment of the present application.
  • some embodiments of the present application provide an audio receiving device suitable for a wireless monitoring system, including a first housing 1 having an inner hollow structure, a PCB board 2 and a PCB board 2 arranged in the first housing 1
  • the antenna module 3 and the first battery 4 electrically connected to the PCB board 2.
  • the antenna module 3 is electrically connected to the PCB board 2 for coupling and receiving electromagnetic signals of a specific frequency band, and the antenna module 3 is arranged on one side of the PCB board 2 And close to the position of the first housing 1.
  • the beneficial effect of this embodiment is that because the antenna module 3 is arranged inside the first housing 1 of the audio receiving device, the appearance of the audio receiving device can be made more concise and beautiful, and it can also prevent the antenna module 3 from being used by the user.
  • the body movements performed in the process are subject to external forces, which also prevents the antenna module 3 from colliding with other objects during the production, storage and use of the audio receiving device, and avoiding the audio receiving device from being unable to be used normally due to damage to the antenna module 3 and affecting The performance or speech of the user; meanwhile, the antenna module 3 is arranged on one side of the PCB board 2 and close to the position of the first housing 1 to ensure that the antenna can obtain good signal strength during the use of the audio receiving device.
  • the audio receiving device provided in this embodiment is particularly suitable for a wireless monitoring system.
  • the antenna module 3 includes an antenna group, and further includes a main control chip 321, and a signal processing chip.
  • the antenna group includes at least a first antenna 311 and a second antenna 312, In addition, the polarization directions of the first antenna 311 and the second antenna 312 are interleaved with each other.
  • the signal processing chip is electrically connected to the main control chip 321 and is connected to the first antenna 311 and the second antenna 312.
  • the signal processing chip is used to connect the first antenna 311 and the second antenna 312.
  • the signals received by the antenna 311 and the second antenna 312 are amplified and demodulated, and the processed signals are sent to the main control chip 321.
  • the antenna module 3 provided in this embodiment works in such a way that the polarization directions of the first antenna 311 and the second antenna 312 are mutually staggered, so that in the direction where the signal of the first antenna 311 is weak, the second antenna 312 can obtain sufficient signal strength. In the direction where the signal of the second antenna 312 is weak, the first antenna 311 can obtain sufficient signal strength.
  • the first antenna 311 and the second antenna 312 respectively correspond to a signal processing chip for amplifying and demodulating their signals and sending them to the main control chip 321.
  • the main control chip 321 simultaneously receives the first antenna 311 and the second antenna 312 The signal received and processed by the signal processing chip, and one of them is selected as the default main signal by default.
  • the antenna When the signal strength or signal-to-noise ratio of the main signal is lower than the threshold, it will automatically switch to the signal provided by another antenna and change the signal As the main signal, the antenna must have a sufficiently strong signal and a sufficiently high signal-to-noise ratio.
  • the advantage of this is that for a single antenna, the signal strength is often high in a certain angle range in space, but the signal is relatively weak or even submerged in noise in some directions, especially in the presence of external interference, When the communication distance is long or there are obstacles, the signal will sometimes be intermittent, which seriously affects the continuity of the performance or speech of the wireless monitoring system user.
  • the first antenna 311 and the second antenna 312 can compensate each other.
  • the main control The automatic switching under the control of the chip 321 can enable the antenna module 3 to obtain a sufficiently good signal in all directions, so that the antenna module 3 can be aligned with the signal transmitter 6 in any posture within the entire effective signal transmission distance. Will not enter the signal trough, thereby enhancing the signal interference capability of the antenna module 3.
  • the antenna group of the antenna module 3 may also include more antenna elements to enhance the anti-interference ability of the antenna module 3.
  • a three-antenna or four-antenna scheme is also feasible, which can enable the antenna module 3 to receive signals. More compensation.
  • the first antenna 311 and the second antenna 312 are both 1/4 antennas, and it is helpful to use a quarter antenna for the first antenna 311 and the second antenna 312.
  • the first antenna 311 and the second antenna 312 both include a feed end 3101 and a terminal 3102, between the feed end 3101 of the first antenna 311 and the feed end 3101 of the second antenna 312
  • the distance is equal to 1/4 of the characteristic wavelength of the second antenna 312, and this can increase the power coupling coefficient of the antenna module 3 in all directions, and prevent the antenna module 3 from being unable to receive signals normally when the signal source is in a specific orientation.
  • the distance between the feeding end 3101 of the first antenna 311 and the feeding end 3101 of the second antenna 312 is less than and as much as possible equal to 1/4 of the characteristic wavelength of the second antenna 312 Yes, in this way, the dual antenna composed of the first antenna 311 and the second antenna 312 can have a good receiving capability for signals in various directions in the space.
  • the first antenna 311 is bent to the side close to the second antenna 312; or, the second antenna 312 is bent to the side close to the first antenna 311 Or, the first antenna 311 is bent to the side close to the second antenna 312, while the two antennas 312 are bent to the side close to the first antenna 311.
  • the necessary space and volume occupied by the antenna module 3 can be reduced, which contributes to the miniaturization of the antenna module 3 ⁇ .
  • the feeding end 3101 of the first antenna 311 is directly opposite to the end 3102 of the second antenna 312, and the spatial directions of the first antenna 311 and the second antenna 312 are staggered .
  • the second antenna 312 is arranged in a vertical direction, its feed end 3101 is located below the end 3102, the first antenna 311 is arranged horizontally, and its feed end 3101 It is directly opposite to the end 3102 of the second antenna 312.
  • the first antenna 311 and the second antenna 312 are both inverted F antennas, so that the input impedance can be adjusted to 50 by changing the feeding position more conveniently.
  • the standard impedance of ohm or 75 ohm also helps to adjust the resonant frequency and impedance bandwidth of the first antenna 311 and the second antenna 312.
  • the first antenna 311 is arranged horizontally, and a part of the antenna structure of the first antenna 311 close to its end 3102 is bent toward the side where the second antenna 312 is located.
  • the antenna 312 is vertically arranged on the side where the feeding end 3101 of the first antenna 311 is located.
  • the end 3102 of the second antenna 312 and part of the antenna structure of the feeding end 3101 are bent to the side away from the end 3102 of the first antenna 311, and
  • the end 3102 of the second antenna 312 faces the feeding end 3101 of the first antenna 311.
  • This arrangement can minimize the mutual shielding and interference between the first antenna 311 and the second antenna 312, and can also reduce the first antenna 311 and the second antenna 312.
  • the necessary volume occupied by the antenna 311 and the second antenna 312 contributes to the miniaturization of the antenna module 3 and the equipment using the antenna module 3.
  • each signal processing chip is connected to one.
  • the main control chip 321 controls the selection and connection of each signal processing chip when the signal strength of the main circuit or the wireless signal-to-noise ratio is lower than the threshold, so as to switch the antenna that receives the signal; the signal processing chip receives the corresponding antenna coupling.
  • the signal of a specific frequency band is sent to the main control chip 321, where the main control chip 321 performs audio decoding, and finally outputs the audio signal received by the antenna group.
  • the first housing 1 includes a housing body 11 and a radome 12, the housing body 11 forms a accommodating slot, and the PCB board 2 and the antenna module 3 are placed in the accommodating slot Inside, the radome 12 is made of a material with high wave permeability, and the antenna module 3 is arranged in the housing body 11 at a position close to the radome 12.
  • a radome 12 made of highly transparent materials is provided, which can reduce the shielding of electromagnetic signals by the space medium and help to further improve the signal strength received by the antenna module 3 .
  • the radome 12 is rectangular, the first antenna 311 and the second antenna 312 are perpendicular to each other, and the first antenna 311 and the second antenna 312 are close to the rectangular radome 12 are arranged on two adjacent edges, and the first antenna 311 and the second antenna 312 are placed at the most edge of the radome 12, which can reduce the space size occupied by the antenna group as much as possible while avoiding other zeros of the audio receiving device.
  • the component affects the coupling and reception of radio waves by the antenna.
  • the antenna module 3 may also include more antenna elements to enhance the anti-interference ability of the audio receiving device.
  • a three-antenna or four-antenna solution is also feasible, which enables the antenna module 3 to receive more signals. make up.
  • the first antenna 311 and the second antenna 312 are arranged close to the edge of the radome 12, the first antenna 311 is arranged in the horizontal direction, and the second antenna 312 is arranged in the vertical direction. And the first antenna 311 and/or the second antenna 312 are bent toward the middle part of the radome 12, so that the necessary space and volume occupied by the antenna module 3 can be reduced, and the audio receiving device can be miniaturized and improved. Portability.
  • the PCB board 2 is provided with a playback device interface 201 for connecting with a playback device (such as a monitor earphone), and the PCB board 2 is also provided with a tuning module 202 and the FM module 203, the tuning module 202 and the FM module 203 extend out of the housing.
  • the user can adjust the output volume and receiving frequency of the audio receiving device through the tuning module 202 and the FM module 203 respectively.
  • the signal transmitter 6 communicates with the audio receiving device through multiple channels. The user can adjust to the frequency band where his group is located through the frequency modulation module 203 to receive audio information, and can also conveniently switch the channel he receives according to actual needs.
  • the PCB board 2 includes a main board 21 and a control board 22, a playback device interface 201, a tuning knob, and a frequency modulation button are connected to the main board 21, and the antenna module 3 is arranged on The control board 22 is far away from the main board 21, and the first battery 4 is arranged on the main board 21 away from the control board 22, so that the influence of the audio receiving device itself on the signal strength can be minimized.
  • the FM module 203 includes a FM button and an indicator light arranged around the FM button to indicate the audio channel output by the current playback device interface 201.
  • the user presses the FM button on the audio receiving device.
  • Channel switching between the preset multiple channels improves the efficiency of user switching channels and the efficiency of wireless monitoring system configuration, installation and debugging.
  • the first battery 4 is a rechargeable first battery 4, and a charging interface electrically connected to the first battery 4 is provided on the PCB board 2.
  • the first battery 4 adopts a 1200mAh/3.7V rechargeable lithium first battery 4, which is light and portable, and can drive a 3.5mm interface headset to work, and the continuous working time can reach more than 6 hours. Able to meet the general needs of performances or speeches.
  • the audio receiving device further includes a fixing structure 5, the fixing structure 5 is connected to the first housing 1, for fixing the first housing 1 in a corresponding installation position, easy to install
  • the audio receiving device is fixed on the user's belt or clothing.
  • the fixing structure 5 includes a fixed shrapnel, the tuning knob, the FM button, and the radome 12 are arranged on the same side of the housing, and the fixed shrapnel is arranged on the side of the housing opposite to the tuning knob and the radome. In this way, when the user fixes the audio receiving device on his belt or clothing, he can easily adjust the volume and the receiving frequency band, and the antenna module 3 is located on the side of the housing facing away from the user, and the audio receiving device can be better. Signal strength.
  • Some embodiments of the present application provide a wireless monitoring system including the audio receiving device as described above.
  • the wireless monitoring system further includes a transmitter switchboard and a transmitter 6.
  • the transmitter 6 is used to transmit signals of a specific channel, and the transmitter 6 It is connected to the transmitter and the main motor, and is connected to the audio receiving device wirelessly.
  • the transmitter 6 includes a second housing 61, a transmitting antenna 62 and a second battery disposed in the second housing 61, and the second battery is used to supply energy to the transmitting antenna 62
  • the transmitter 6 transmits a signal of a specific channel through the transmitting antenna 62.
  • the transmitter 6 also includes an audio interface 63, and the transmitter 6 is electrically connected to the transmission switchboard through the audio interface 63.
  • the second battery adopts 860mAh/3.7V rechargeable lithium secondary battery, which is light and portable, and can drive the transmitting antenna 62 to work.
  • the continuous working time can reach more than 6 hours, which can meet the performance or General needs for speeches.
  • the audio interface 63 includes a locking shrapnel and an unlocking button abutting against the locking shrapnel.
  • the locking shrapnel locks the transmitter 6 to the corresponding interface of the launching switchboard.
  • the unlocking button is used to unlock the lock shrapnel against the transmitter. 6 is locked, the transmitter 6 can be separated from the transmitter switchboard only when the unlock button is pressed. In this way, the transmitter 6 can be prevented from loosening or even detached when it is touched by mistake, thereby preventing the transmitter 6 and the transmitting host from being improperly connected to affect the normal use of the wireless monitoring system, and also avoiding the embarrassing situation of the transmitter 6 being lost.
  • the audio interface 63 adopts an XLR connector (Cannon X Series, Latch, Rubber, Canon spring lock rubber connector, commonly known as Canon connector) is connected to the launching switchboard.
  • some embodiments of the present application also provide a signal transceiving terminal, including: a first antenna 311, a first transceiving chip 3221, a second antenna 312, a second transceiving chip 3222, and a main controller Chip 321, wherein the first antenna 311 is connected to the first transceiver chip 3221, the second antenna 312 is connected to the second transceiver chip 3222, and the first transceiver chip 3221 and the second transceiver chip 3222 are connected to the main control chip 321 in parallel.
  • the first antenna 311 and the second antenna 312 work at the same time to receive electromagnetic wave signals in the air.
  • the first transceiver chip 3221 and the second transceiver chip 3222 receive signals from the first antenna 311 and the second antenna 312, respectively. Then, the first transceiver chip 3221 and the second transceiver chip 3222 transmit their signals to the main control chip 321 in parallel and at the same time.
  • the main control chip 321 receives the signals from the first transceiver chip 3221 and the second transceiver chip 3222, and compares the signals of the first transceiver chip 3221 and the second transceiver chip 3222.
  • a transceiver chip 3221 and a second transceiver chip 3222 signal the main control chip 321 selects whether to use the data of the first transceiver chip 3221 or the data of the second transceiver chip 3222 according to the signal quality of the two.
  • the signal transceiving terminal provided by the embodiment of the present application includes a first antenna 311 and a second antenna 312, which can ensure good reception of electromagnetic wave signals.
  • the first antenna 311 and the second antenna 312 correspond to each other.
  • the first transceiving chip 3221 and the second transceiving chip 3222 are connected to the main control chip 321.
  • the main control chip 321 compares the data of the first transceiving chip 3221 and the second transceiving chip 3222 to determine whether to use the data of the first transceiving chip 3221 or The data of the second transceiver chip 3222, for example, if the data sent from the first transceiver chip 3221 has an error, it will switch to the second transceiver chip 3222. Since the signal switching is completed by the main control chip 321, the switching time is shorter and can be Ensure the continuity of the data before and after switching to avoid signal discontinuity caused by data loss.
  • the signal transceiving terminal provided in the embodiment of the present application may be any type of terminal equipment that requires signal reception and transmission.
  • the signal transceiving terminal is the receiving end in the wireless monitoring system, and it mainly relies on the first antenna 311 and the second antenna 312 to achieve a good signal receiving effect.
  • the first antenna 311 and the second antenna 312 may be hidden in the first housing.
  • the signal transceiving terminal may also transmit signals through the first antenna 311 or the second antenna 312, and receive signals through the first antenna 311 and the second antenna 312.
  • the signal transceiving terminal can also be used for transceiving video signals, or transceiving audio signals and video signals, or other types of data signals.
  • the first antenna 311 and the second antenna 312 are located on the same plane (positioned as the first plane here) and are arranged perpendicular to each other.
  • the advantage of this is that, taking the signal transceiving terminal as the receiving end in the wireless monitoring system as an example, the first antenna 311 and the second antenna 312 are perpendicular to each other to ensure that the first antenna 311 and the second antenna 312 are on the first plane. At least one will not be located on the trough, that is, electromagnetic waves can be received at any time and at any location.
  • the plane where the first antenna 311 and the second antenna 312 are located is designed according to the specific type of the signal transceiving terminal and the electric field direction of the electromagnetic wave to be transceived. For example, in the field of wireless monitoring systems, electromagnetic waves are transmitted in a horizontal polarization manner, and the first plane where the first antenna 311 and the second antenna 312 are located should be designed to be a vertical plane in the normal use state of the receiving end.
  • the lengths of the first antenna 311 and the second antenna 312 are both a quarter wavelength.
  • the distance between the first antenna 311 and the second antenna 312 is also a quarter wavelength, which can further ensure that the first antenna 311 and the first antenna 311 and the second antenna 311 are on the first plane. At least one of the two antennas 312 will not be located in the trough.
  • the signal transceiver terminal is the receiving terminal in the wireless monitoring system.
  • the signal transceiver terminal also includes an audio decoder 33 and an analog-to-digital converter.
  • the audio decoder 33 is connected to the main control chip 321.
  • the main control chip 321 sends the selected data to the audio decoder 33.
  • the audio decoder 33 is used to The encoded multi-channel audio information from the main control chip 321 is decoded and restored, and the analog-to-digital converter converts the decoded and restored digital signal into an analog signal, that is, an audio signal.
  • the functions of the audio decoder 33 and the analog-to-digital converter can also be integrated on the main control chip 321, and the main control chip 321 directly decodes the signal after selecting the signal and realizes the analog-to-digital conversion; alternatively, the audio decoder can also be integrated 33 and the analog-to-digital converter are integrated on the transceiver chip, so that the transceiver chip has a signal processing function and becomes a signal processing chip.
  • the main control chip 321 can select signals according to multiple factors such as signal strength and noise of each signal processing chip.
  • the receiving end further includes an amplifier 34, which is used to amplify the obtained analog audio signal for normal use by the user.
  • the working process of the receiving end is: the first antenna 311 and the second antenna 312 work at the same time to receive electromagnetic wave signals in the air and convert them into corresponding electrical signals.
  • the first transceiver chip 3221 and the second transceiver chip 3222 will come from The electrical signals from the first antenna 311 and the second antenna 312 are converted into corresponding digital signals; then, the first transceiver chip 3221 and the second transceiver chip 3222 simultaneously transmit the digital signals to the main control chip 321, and the main control The chip 321 receives the digital signals of the first transceiver chip 3221 and the second transceiver chip 3222; the main control chip 321 demodulates the digital signals from the first transceiver chip 3221 and the second transceiver chip 3222 respectively, and then obtains the digital signals from the modulated high frequency The digital baseband signal corresponding to the original electromagnetic wave signal is recovered from the signal, and the digital baseband signals of the first transceiver chip 3221 and the second transceiver chip 3222 are compared.
  • the main control chip 321 chooses to use the first transceiver according to the quality of the digital baseband signals of the two
  • the data of the chip 3221 is still the data of the second transceiver chip 3222; taking the data of the first transceiver chip 3221 as an example, the main control chip 321 sends the digital baseband signal of the first transceiver chip 3221 to the audio decoder 33, and the audio decoder 33
  • the encoded multi-channel audio information is decoded and restored, the analog-to-digital converter converts the decoded digital signal into an analog signal, and finally, the amplifier 34 amplifies the converted analog audio signal; when the main control chip 321 detects When the quality of the digital baseband signal of the first transceiver chip 3221 is poor, the digital baseband signal of the second transceiver chip 3222 is automatically switched and selected.
  • the electrical signal described in this embodiment may be a current signal.
  • the signal transceiving terminal further includes a third antenna 313 and a third transceiving chip 3223 connected to each other.
  • the third transceiving chip 3223 communicates with the first transceiving chip 3221 and the second transceiving chip 3223.
  • the chips 3222 are connected in parallel to the main control chip 321.
  • the main control chip 321 is also used to compare the signals of the first transceiver chip 3221, the second transceiver chip 3222 and the third transceiver chip 3223, and select the first transceiver chip 3221 to use.
  • the second transceiver chip 3222 is also the data of the third transceiver chip 3223.
  • the main control chip 3221 compares and selects signals from the first transceiver chip 3221, the second transceiver chip 3222, and the third transceiver chip 3223. The principle is the same and will not be repeated here.
  • the third antenna 313 is arranged perpendicular to the first plane. In this way, the first antenna 311, the second antenna 312, and the third antenna 313 are perpendicular to each other in a three-dimensional space, which can ensure that the electromagnetic wave can be effectively received regardless of the direction of the electromagnetic wave in the surrounding environment.
  • the length of the third antenna 313 is a quarter wavelength.
  • the fourth antenna is arranged perpendicular to the first plane, and the direction of the fourth antenna and the third antenna 313 are opposite.
  • the embodiments of the present application also provide a wireless monitoring system (not shown), including the receiving end and the transmitting end (not shown) mentioned in the foregoing embodiments.
  • the transmitting end is used to transmit wireless electromagnetic waves containing audio signals to the receiving end.
  • the receiving end of the wireless monitoring system uses the first antenna 311 and the second antenna 312 to receive signals at the same time.
  • the main control chip 321 performs data comparison and selection, which can ensure the reception of electromagnetic wave signals, and the switching time is shorter, ensuring the data before and after switching. Continuity, to avoid signal discontinuity caused by data loss, and better user experience.
  • the signal reception at the receiving end can realize zero loss in real time, and the signal reception quality is particularly good.

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Abstract

本申请公开了一种适用于无线监听系统的音频接收装置，包括呈内中空结构的第一外壳（1），设置于第一外壳（1）内的PCB板（2）和用于耦合接收特定频段的电磁信号的天线模块（3），天线模块（3）设置于PCB板（2）的一侧且贴近第一外壳（1）的位置，具有更好的信号接收强度；天线模块（3）包括天线组，还包括主控芯片（321），以及信号处理芯片，天线组至少包括第一天线（311）和第二天线（312），且第一天线（311）和第二天线（312）的极化方向互为交错，主控芯片（321）从第一天线（311）和第二天线（312）中选取信号强度更强的一个进行接收与处理，可以保证音频接收装置以任何姿态放置时都能够获得优良的信号强度。

Description

一种音频接收装置、无线监听系统及信号收发终端
本申请要求于2019年10月31日在中国专利局提交的三份专利申请的优先权，三份专利申请分别是申请号为CN201921867043.4，申请名称为“一种信号收发终端和无线监听系统”的中国专利申请，申请号为CN201921863809.1，申请名称为“一种音频接收装置和监听系统”的中国专利申请和申请号为CN201921863695.0，申请名称为“一种天线模块、音频接收装置和监听系统”的中国专利申请，上述三份专利申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线信号传输技术领域，具体涉及一种音频接收装置、信号收发终端及无线监听系统。
 背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然构成现有技术。
无线监听系统通常都包括发射机和接收机，接收机用于佩戴在使用者身上，接收信号并通过外接的耳机向使用者提供音频信息，让使用者能够根据听到的音频信息对表演或者演讲的节奏进行把握；发射机则是一台体积较大的设备，用于将采集到的音频信号发射至接收机，需要连接市电和音频信号线以正常工作。接收机能够正常接收到信号是其工作的必要基础。
首先，传统的监听系统中，接收机都会有一个棒状或者软棒状的天线，在实际使用过程中，裸露在外的天线会直接影响接收机的外观。此外，使用者往往会在使用过程中进行一系列的肢体动作，外设的天线容易受到外力破坏，导致天线受损，接收机无法正常使用。
另外，对于信号接受而言，在无线数据的传输过程中，数据更加稳定一直是所有工程师挑战的方向。生活当中，无线电设备通常是由发射器和接收器组成，发射器把需要传输的数据信号（包括声音、图像、视频，以及无线调制解调器的数据等）处理好，将其调制到载波频率上，载波信号经过放大后发射空气中。接收器接收到无线载波信号，从载波信号中解调出对应的数据信号。
发射器和接收器都是使用天线来完成与空气之间的信号传递。发射机通过天线把信号传递到空气中，以天线为中心，遵循载波的自有特性（这里主要是说载波频率）和天线设置的角度传输到空气中，在空气中沿直线传播。空气中的微尘颗粒、水分子、气体分子等都会对电磁波有吸收和散射作用，因此，本身电磁波在空气中也会快速衰减。另外，当遇到障碍物以后，会根据障碍物的不同而形成反射、折射或吸收，因而，空气中存在各种各样大小不同、方向不同、时间不同的电磁波信号。接收器通过天线接收到空气中电磁波信号，解调放大后输出对应的数据信息。
 技术问题
目前的接收器还存在信号接收不佳的问题，工程师们会通过各种方式来改善和提升信号的稳定度，如，采用改善天线匹配性能、用射频开关切换天线、重复发送数据等方式，然而，这些方式仍不能有效解决信号接收差的问题，导致所解调的数据存在不完整、质量差等问题。
 技术解决方案
本申请实施例的目的之一在于：提供一种音频接收装置、无线监听系统及信号收发终端，旨在解决现有的接收器信号接收不佳的问题。
本申请实施例采用的技术方案是：
第一方面，本申请提供了一种音频接收装置，所述音频接收装置包括呈内中空结构的第一外壳，设置于所述第一外壳内的PCB板和天线模块，以及与所述PCB板电连接的第一电池，所述天线模块与所述PCB板电性连接，用于耦合接收特定频段的电磁信号，且所述天线模块设置于所述PCB板的一侧的贴近所述外壳的位置。
在本申请的一个实施例中，所述天线模块包括天线组，还包括主控芯片，以及信号处理芯片，所述天线组至少包括第一天线和第二天线，且所述第一天线和所述第二天线的极化方向互为交错，所述信号处理芯片电连接所述主控芯片且与所述第一天线和所述第二天线馈电连接，所述信号处理芯片用于对所述第一天线和所述第二天线接收到的信号进行放大与解调处理，以及将处理后的信号发送至所述主控芯片。
在本申请的一个实施例中，所述第一天线和所述第二天线均为1/4天线。
在本申请的一个实施例中，所述第一天线和所述第二天线均包括馈电端与末端，所述第一天线的馈电端和所述第二天线的馈电端之间的距离等于所述第二天线的特征波长的1/4。
在本申请的一个实施例中，所述第一天线的馈电端正对所述第二天线的末端，所述第一天线和所述第二天线的极化方向互为交错。
在本申请的一个实施例中，所述第一天线和所述第二天线均采用倒F天线。
在本申请的一个实施例中，所述第一外壳包括外壳本体和天线罩，所述外壳本体形成一个容置槽，所述PCB板和所述天线模块置于所述容置槽内，所述天线罩采用高透波性的材料制成，所述天线模块设置于所述外壳本体内贴近所述天线罩的位置。
在本申请的一个实施例中，所述天线罩呈矩形，所述第一天线和所述第二天线相互垂直，所述第一天线和所述第二天线紧贴矩形的所述天线罩相邻的两个边沿设置。
在本申请的一个实施例中，所述第一天线沿水平方向设置，所述第二天线沿竖直方向设置，且所述第一天线和/或所述第二天线向所述天线罩的中间部分弯折。
在本申请的一个实施例中，所述PCB板上设置有用于与播放设备连接的播放设备接口，所述PCB板上还设置有调音旋钮和调频按钮，所述调音旋钮和所述调频按钮伸出所述第一外壳。
在本申请的一个实施例中，所述第一电池采用充电第一电池，所述PCB板上设置有与所述第一电池电连接的充电接口。
在本申请的一个实施例中，所述音频接收装置还包括用于固定所述第一外壳的固定结构，所述固定结构连接所述第一外壳。
第二方面，本申请提供了一种无线监听系统，所述无线监听系统包括如上所述的音频接收装置，所述无线监听系统还包括发射总机和用于发射特定频道的信号的发射机，所述发射机与所述发射总机电连接，且所述发射机与所述音频接收装置无线信号连接。
在本申请的一个实施例中，所述发射机包括第二外壳，设置于所述第二外壳内的发射天线和第二电池，所述第二电池用于向所述发射天线供能，所述发射机通过所述发射天线发射特定频道的信号，所述发射机还包括音频接口，所述发射机通过所述音频接口电连接所述发射总机。
在本申请的一个实施例中，所述音频接口包括锁定弹片和抵接于所述锁定弹片的解锁按钮，所述锁定弹片将所述发射机锁定于所述发射总机相对应的接口，所述解锁按钮用于解除所述锁定弹片对所述发射机的锁定。
第三方面，本申请提供了一种信号收发终端，包括：至少两个收发天线；至少两个收发芯片，所述收发芯片与所述收发天线一一对应连接；主控芯片，多个所述收发芯片并联地连接至所述主控芯片；所述主控芯片用于比较多个所述收发芯片的数据，并选择使用多个所述收发芯片中的其中一个的数据。
在本申请的一个实施例中，所述收发芯片用于将来自所述收发天线的电信号转换为对应的模拟信号。
在本申请的一个实施例中，所述信号收发终端还包括音频解码器和模数转换器，所述音频解码器连接于所述主控芯片，所述主控芯片用于将选择的数据发送至所述音频解码器，所述音频解码器用于解码还原来自所述主控芯片的数据，所述模数转换器将所述音频解码器所解码还原的数字信号转换为模拟信号；所述信号收发终端还包括放大器，所述放大器连接至所述模数转换器。
在本申请的一个实施例中，所述收发天线和所述收发芯片的数量均为两个，所述主控芯片用于比较两个所述收发芯片的数据；或者，所述收发天线和所述收发芯片的数量均为三个，所述主控芯片用于比较三个所述收发芯片的数据。
在本申请的一个实施例中，各所述收发天线相互垂直设置。
 有益效果
本申请实施例提供的音频接收装置和无线监听系统的有益效果在于：由于将天线模块设置于音频接收装置的第一外壳的内侧，可以使得音频接收装置的外观更加简洁美观的同时，还能避免天线模块因使用者在使用过程中进行的肢体动作受到外力，也防止天线模块了在音频接收装置的生产储运和使用过程中与其他物件发生碰撞刮蹭，避免音频接收装置因天线模块受损无法正常使用，影响使用者的表演或者演说等；同时，将天线模块设置于PCB板的一侧且贴近第一外壳的位置，能够保证在音频接收装置使用的过程中，天线能够获得良好的信号强度。
本申请实施例提供的信号收发终端的有益效果在于：该信号收发终端包括第一天线和第二天线，第一天线和第二天线由各自对应的第一收发芯片和第二收发芯片连接至主控芯片，主控芯片通过比较第一收发芯片和第二收发芯片的数据来决定选择使用第一收发芯片的数据还是第二收发芯片的数据，由于数据的切换由主控芯片完成，切换时间更短，可以保证切换前后数据的连续性，避免出现数据丢失造成的信号不连续。
 附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例或示范性技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其它的附图。
图1是本申请一实施例提供的音频接收装置的结构示意图；
图2是本申请一实施例提供的音频接收装置的内部结构示意图；
图3时本申请一实施例提供的无线监听系统的发射机的结构示意图；
图4是本申请一实施例提供的信号收发终端的结构示意图；
图5是本申请另一实施例提供的信号收发终端的结构示意图。
上述各附图中的标号与特征的对应关系如下：
1-第一外壳；11-外壳本体；12-天线罩；2-PCB板；21-主板；22-控制板；201-播放设备接口；202-调音模块；203-调频模块；3-天线模块；3101-馈电端；3102-末端；311-第一天线；312-第二天线；313-第三天线；321-主控芯片；3221-第一收发芯片；3222-第二收发芯片；3223-第三收发芯片；33-音频解码器；34-放大器；4-第一电池；5-固定结构；6-发射机；61-第二外壳；62-发射天线；63-音频接口。
 本发明的实施方式
为了使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本申请。
需说明的是，当部件被称为“固定于”或“设置于”另一个部件，它可以直接在另一个部件上或者间接在该另一个部件上。当一个部件被称为是“连接于”另一个部件，它可以是直接或者间接连接至该另一个部件上。术语“上”、“下”、“左”、“右”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。术语“第一”、“第二”仅用于便于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明技术特征的数量。“多个”的含义是两个或两个以上，除非另有明确具体的限定。
为了说明本申请所述的技术方案，以下结合具体附图及实施例进行详细说明。
请参阅图1和图2，本申请一些实施例提供了一种适用于无线监听系统的音频接收装置，包括呈内中空结构的第一外壳1，设置于第一外壳1内的PCB板2和天线模块3，以及与PCB板2电连接的第一电池4，天线模块3与PCB板2电性连接，用于耦合接收特定频段的电磁信号，且天线模块3设置于PCB板2的一侧且贴近第一外壳1的位置。
本实施例的有益效果在于，由于将天线模块3设置于音频接收装置的第一外壳1的内侧，可以使得音频接收装置的外观更加简洁美观的同时，还能避免天线模块3因使用者在使用过程中进行的肢体动作受到外力，也防止天线模块3了在音频接收装置的生产储运和使用过程中与其他物件发生碰撞刮蹭，避免音频接收装置因天线模块3受损无法正常使用，影响使用者的表演或者演说等；同时，将天线模块3设置于PCB板2的一侧且贴近第一外壳1的位置，能够保证在音频接收装置使用的过程中，天线能够获得良好的信号强度。本实施例提供的音频接收装置尤其适用于无线监听系统。
请参阅图1和图2，在本申请的一个实施例中，天线模块3包括天线组，还包括主控芯片321，以及信号处理芯片，天线组至少包括第一天线311和第二天线312，且第一天线311和第二天线312的极化方向互为交错，信号处理芯片电连接主控芯片321且与第一天线311和第二天线312馈电连接，信号处理芯片用于对第一天线311和第二天线312接收到的信号进行放大与解调处理，以及将处理后的信号发送至主控芯片321。
具体而言，本实施例提供的天线模块3是这样工作的，第一天线311和第二天线312的极化方向互为交错，这样，第一天线311信号较弱的方向上，第二天线312能够获得足够的信号强度，第二天线312信号较弱的方向上，第一天线311能够获得足够的信号强度。第一天线311和第二天线312分别对应一个信号处理芯片，用于将其信号进行放大和解调处理并发送至主控芯片321，主控芯片321同时接收第一天线311和第二天线312接收且经信号处理芯片处理后的信号，并默认选择其中一个作为缺省主路信号，当主路信号的信号强度或者信噪比低于阈值时，自动切换至另一天线提供的信号并将新的信号作为主路信号，此时该天线必定是信号足够强且信噪比足够高的。
这样做的好处在于，对于单一的天线而言，在空间上往往某一角度范围信号强度高，但是一些方向上会出现信号相对较弱甚至被淹没在噪声中的现象，尤其在外界存在干扰、通讯距离较长或者存在障碍物等情景下，信号有时会时断时续，严重影响无线监听系统使用者的表演或者演讲的连续性。本实施例中通过设置极化方向不同的第一天线311和第二天线312，这样，第一天线311和第二天线312可以互为补偿，信号强度弱或者信噪比低时，在主控芯片321的控制下自动切换，能够使得天线模块3在全方向上均能获得足够好的信号，可以使该天线模块3在整个有效信号传输距离内，以任何姿态对准信号发射机6时均不会进入信号波谷，从而增强了天线模块3的信干扰能力。
应当理解的是，天线模块3的天线组还可以包括更多的天线元件以增强天线模块3的抗干扰能力，比如三天线或者四天线等方案也是可行的，能够使得天线模块3对信号接收获得更多的补偿。
请参阅图1和图2，在本申请的一个实施例中，第一天线311和第二天线312均为1/4天线，第一天线311和第二天线312采用四分之一天线有助于减小天线模块3的尺寸；第一天线311和第二天线312均包括馈电端3101与末端3102，第一天线311的馈电端3101和第二天线312的馈电端3101之间的距离等于第二天线312的特征波长的1/4，且这样可以提高天线模块3在全方向上的功率耦合系数，避免天线模块3在信号源处于特定方位时无法正常接收信号。
在本实施例的一个具体方案中，第一天线311的馈电端3101和第二天线312的馈电端3101之间的距离是小于且尽可能等于第二天线312的特征波长的1/4的，这样可以使得第一天线311和第二天线312组成的双天线能够对空间内各个方向的信号都具有良好的接收能力。
请参阅图1和图2，在本申请的一个实施例中，第一天线311向接近第二天线312的一侧弯折；或者，第二天线312向接近第一天线311的一侧弯折；或者，第一天线311向接近第二天线312的一侧弯折，同时二天线312向接近第一天线311的一侧弯折。这样可以在不影响天线模块3接收信号的固有功能，且防止第一天线311和第二天线312相互影响的前提下，减小天线模块3占用的必要空间体积，有助于天线模块3的小型化。
请参阅图1和图2，在本申请的一个实施例中，第一天线311的馈电端3101正对第二天线312的末端3102，且第一天线311和第二天线312的空间方向交错。
请参阅图1和图2，作为本实施例的一个具体方案，第二天线312沿竖直方向设置，其馈电端3101位于末端3102的下方，第一天线311水平布置，其馈电端3101与第二天线312的末端3102正对。
请参阅图1和图2，在本申请的一个实施例中，第一天线311和第二天线312均采用倒F天线，这样可以更为方便地通过改变馈电位置，将输入阻抗调整至50欧姆或者75欧姆这样的标准阻抗，同时也有助于调整第一天线311和第二天线312的谐振频率和阻抗带宽等性能。
请参阅图1和图2，作为本实施例的一个具体方案，第一天线311水平布置，第一天线311接近其末端3102的部分天线结构向第二天线312所在的一侧弯折，第二天线312竖直布置于第一天线311馈电端3101所在的一侧，第二天线312的末端3102和馈电端3101的部分天线结构向远离第一天线311末端3102的一侧弯折，且第二天线312的末端3102正对第一天线311的馈电端3101，这样的设置可以尽可能减小第一天线311和第二天线312之间的相互遮挡与干扰，还可以减小第一天线311和第二天线312占用的必要体积，有助于天线模块3和采用天线模块3的设备的小型化。
请参阅图1、图2、图4和图5，作为本实施例的一个具体方案，天线组中所有的天线都有与之一一对应的信号处理芯片，也即每一个信号处理芯片连接一天线，主控芯片321通过在主路信号强度或者无线信噪比低于阈值时，控制各个信号处理芯片的选择与连通，实现对接收信号的天线的切换；信号处理芯片接收对应的天线耦合得到的特定频段的信号，并发送至主控芯片321，在主控芯片321处进行音频解码，并最终将天线组接收到的音频信号输出。
请参阅图1，在本申请的一个实施例中，第一外壳1包括外壳本体11和天线罩12，外壳本体11形成一个容置槽，PCB板2和天线模块3置于所述容置槽内，天线罩12采用高透波性的材料制成，天线模块3设置于外壳本体11内贴近天线罩12的位置。在第一外壳1上贴近天线模块3的位置，设置有高透波性材料制成的天线罩12，可以减少空间介质对电磁信号的遮挡，有助于进一步提高天线模块3接收到的信号强度。
请参阅图1和图2，在本申请的一个实施例中，天线罩12呈矩形，第一天线311和第二天线312相互垂直，第一天线311和第二天线312紧贴矩形的天线罩12相邻的两个边沿设置，将第一天线311和第二天线312置于天线罩12最边沿的位置，可以尽可能的减小天线组占用的空间尺寸，同时避免音频接收装置的其他零部件影响天线对无线电波的耦合接收。
应当理解的是，天线模块3还可以包括更多的天线元件以增强音频接收装置的抗干扰能力，比如三天线或者四天线等方案也是可行的，能够使得天线模块3对信号接收获得更多的补偿。
请参阅图1和图2，在本申请的一个实施例中，第一天线311和第二天线312贴近天线罩12的边缘设置，第一天线311沿水平方向设置，第二天线312沿竖直方向设置，且第一天线311和/或第二天线312向天线罩12的中间部分弯折，这样可以减小天线模块3占用的必要空间体积，有助于音频接收装置的小型化，提高其便携性。
请参阅图1和图2，在本实施例的一个具体方案中，PCB板2上设置有用于与播放设备（如监听耳机）连接的播放设备接口201，PCB板2上还设置有调音模块202和调频模块203，调音模块202和调频模块203伸出外壳。使用者可以分别通过调音模块202和调频模块203调整音频接收装置的输出音量与接收频率，在使用者分为多组时，信号发射机6通过多个频道和音频接收装置进行通讯，每组使用者可以通过调频模块203调整至自己的小组所在的频段接收音频信息，也能够方便地根据实际需要切换自己接收的频道。
请参阅图1和图2，作为本实施例的一个优选方案，PCB板2包括主板21和控制板22，播放设备接口201、调音旋钮和调频按钮连接在主板21上，天线模块3设置于控制板22远离主板21的一侧，第一电池4设置在主板21远离控制板22的一侧，这样可以将音频接收设备本身对信号强度的影响降至最低。
作为本实施例的一个优选方案，调频模块203包括调频按钮和设置于调频按钮周围设置有指示灯，用于指示当前播放设备接口201输出的音频频道，使用者通过按下调频按钮在音频接收装置预设的多个频道之间进行频道切换，提高了使用者切换频道的效率并无线监听系统的配置与安装调试的效率。
在本实施例的一个具体方案中，所述第一电池4采用充电第一电池4，PCB板2上设置有与第一电池4电连接的充电接口。作为本实施例的一个优选方案，第一电池4采用1200mAh/3.7V可充电锂第一电池4，轻便易携，且能够驱动3.5mm接口的耳机工作，持续工作时间能达到6个小时以上，能够满足表演或者演讲的一般需求。
请参阅图1和图2，在本申请的一个实施例中，音频接收装置还包括固定结构5，固定结构5连接第一外壳1，用于固定第一外壳1于相应的安装位置，便于将音频接收装置固定在使用者的腰带或者衣物上。作为本实施例的一个优选方案，固定结构5包括固定弹片，调音旋钮、调频按钮以及天线罩12设置在外壳的同一侧，固定弹片设置于外壳上背对调音旋钮和调频按钮的一侧，这样，使用者在将音频接收装置固定在自己的腰带或者衣物上时，可以方便地调节音量与接收的频段，且天线模块3位于外壳背对使用者的一侧，音频接收装置能够获得更好的信号强度。
本申请的一些实施例提供了一种包括了如上所述的音频接收装置的无线监听系统，无线监听系统还包括发射总机和发射机6，发射机6用于发射特定频道的信号，且发射机6与发射总机电连接，与音频接收装置无线信号连接。
请参阅图3，在本申请的一个实施例中，发射机6包括第二外壳61，设置于第二外壳61内的发射天线62和第二电池，第二电池用于向发射天线62供能，发射机6通过发射天线62发射特定频道的信号，发射机6还包括音频接口63，发射机6通过音频接口63电连接发射总机。通过将发射天线62和第二电池内置于第二外壳61，可以使得发射机6的外观更加简洁美观，同时，还能避免发射天线62在生产储运和使用的过程中，因受到外力而变形甚至损坏，避免发射机6因发射天线62受损无法正常使用，打断使用者表演或者演说的节奏。
作为本实施例的一个优选方案，第二电池采用860mAh/3.7V可充电锂第二电池，轻便易携，且能够驱动发射天线62工作，持续工作时间能达到6个小时以上，能够满足表演或者演讲的一般需求。
在本申请的一个实施例中，音频接口63包括锁定弹片和抵接于锁定弹片的解锁按钮，锁定弹片将发射机6锁定于发射总机相对应的接口，解锁按钮用于解除锁定弹片对发射机6的锁定，发射机6仅在解锁按钮被按下时能够与发射总机分离。这样可以避免发射机6在被误触碰的情况下发生松动甚至脱离，进而防止发射机6和发射主机连接不牢影响无线监听系统的正常使用，也能避免发射机6丢失的尴尬情况。作为本实施例的一个优选方案，音频接口63采用XLR接头（Cannon X Series,Latch, Rubber，卡农弹簧锁橡胶接头，俗称卡农接头）与发射总机相连接。
请参阅图4和图5，本申请的一些实施例还提供了一种信号收发终端，包括：第一天线311、第一收发芯片3221、第二天线312、第二收发芯片3222，以及主控芯片321，其中，第一天线311与第一收发芯片3221连接，第二天线312与第二收发芯片3222连接，第一收发芯片3221和第二收发芯片3222并联地连接至主控芯片321。具体来说，第一天线311和第二天线312同时工作以接收空气中的电磁波信号，第一收发芯片3221和第二收发芯片3222分别接收来自于第一天线311和第二天线312的信号，然后，第一收发芯片3221和第二收发芯片3222并联地、同时地将其信号传递至主控芯片321，主控芯片321接收第一收发芯片3221和第二收发芯片3222的信号，并比较第一收发芯片3221和第二收发芯片3222的信号，主控芯片321根据二者的信号质量选择是使用第一收发芯片3221的数据还是第二收发芯片3222的数据。
请参阅图4和图5，本申请实施例提供的信号收发终端，其包括第一天线311和第二天线312，可以保证电磁波信号的良好接收，第一天线311和第二天线312由各自对应的第一收发芯片3221和第二收发芯片3222连接至主控芯片321，主控芯片321通过比较第一收发芯片3221和第二收发芯片3222的数据来决定选择使用第一收发芯片3221的数据还是第二收发芯片3222的数据，例如，若第一收发芯片3221发送而来的数据出现错误，则切换至第二收发芯片3222，由于信号的切换由主控芯片321完成，切换时间更短，可以保证切换前后数据的连续性，避免出现数据丢失造成的信号不连续。
本申请实施例提供的信号收发终端，可以是任何类型的需要信号接收和发送的终端设备。在一具体实施例中，该信号收发终端为无线监听系统中的接收端，主要依靠第一天线311和第二天线312实现良好的信号接收效果。第一天线311和第二天线312可隐藏于第一壳体内。
请参阅图4和图5，在其他实施例中，该信号收发终端还可以通过第一天线311或第二天线312来发送信号，以及通过第一天线311和第二天线312来接收信号。
在其他实施例中，该信号收发终端还可以用于收发视频信号，或者是收发音频信号和视频信号，或者是其他类型的数据信号。
请参阅图2，在本申请的一个实施例中，第一天线311和第二天线312位于同一平面(此处定位为第一平面)上且相互垂直设置。这样的好处是，以该信号收发终端为无线监听系统中的接收端为例，第一天线311和第二天线312相互垂直可以保证在第一平面上第一天线311和第二天线312中的至少一个不会位于波谷上，也即，在任何时段、任何位置上都能接收到电磁波。
第一天线311和第二天线312所在的平面根据该信号收发终端的具体类型以及所要收发的电磁波的电场方向来设计。例如，在无线监听系统领域，电磁波采用水平极化方式来发射，则第一天线311和第二天线312所在的第一平面应当设计为在该接收端的通常使用状态下为竖直平面。
请参阅图4和图5，第一天线311和第二天线312的长度均为四分之一波长。
请参阅图2，在本申请的一个实施例中，第一天线311和第二天线312之间的距离也为四分之一波长，这样进一步可以保证在第一平面上第一天线311和第二天线312中的至少一个不会位于波谷。
请参阅图4和图5，在一个具体实施例中，该信号收发终端为无线监听系统中的接收端。该信号收发终端还包括音频解码器33和模数转换器，音频解码器33连接于主控芯片321，主控芯片321将所选择的数据发送至音频解码器33，音频解码器33用于将来自主控芯片321的经过编码的多声道音频信息作解码还原，模数转换器将所解码还原的数字信号转换为模拟信号，也即音频信号。当然，也可以将音频解码器33和模数转换器的功能集成在主控芯片321上，主控芯片321在对信号进行选择后直接解码并实现模数转换；或者，也可以将音频解码器33和模数转换器集成在收发芯片上，使得收发芯片具备信号处理的功能，成为信号处理芯片，主控芯片321能够根据各信号处理芯片的信号强度、噪声等多重因素对信号进行选择。
请参阅图4和图5，在本申请的一个实施例中，该接收端还包括放大器34，放大器34用于将所得到的模拟音频信号进行放大供使用人员正常使用。
具体地，该接收端的工作过程是：第一天线311和第二天线312同时工作以接收空气中的电磁波信号并转换为对应的电信号，第一收发芯片3221和第二收发芯片3222分别将来自于第一天线311和第二天线312的电信号转换为对应的数字信号；然后，第一收发芯片3221和第二收发芯片3222并联地、同时地将数字信号传递至主控芯片321，主控芯片321接收第一收发芯片3221和第二收发芯片3222的数字信号；主控芯片321分别将来自于第一收发芯片3221和第二收发芯片3222的数字信号进行解调，从被调制的高频信号中恢复出对应原电磁波信号的数字基带信号，并比较第一收发芯片3221和第二收发芯片3222的数字基带信号，主控芯片321根据二者的数字基带信号的质量选择是使用第一收发芯片3221的数据还是第二收发芯片3222的数据；以选择第一收发芯片3221的数据为例，主控芯片321将第一收发芯片3221的数字基带信号发送至音频解码器33，音频解码器33将经过编码的多声道音频信息作解码还原，模数转换器将所解码的数字信号转换为模拟信号，最后，放大器34将所转换得到的模拟音频信号放大出来；当主控芯片321检测到第一收发芯片3221的数字基带信号的质量较差时，自动切换并选择第二收发芯片3222的数字基带信号。更为具体的，本实施例中所述的电信号可以是电流信号。
请参阅图5，在本申请的一个实施例中，该信号收发终端还包括相互连接的第三天线313和第三收发芯片3223，第三收发芯片3223以与第一收发芯片3221、第二收发芯片3222均并联的方式连接至主控芯片321，主控芯片321还用于比较第一收发芯片3221、第二收发芯片3222和第三收发芯片3223的信号，并选择使用第一收发芯片3221、第二收发芯片3222还是第三收发芯片3223的数据。
在本申请的一个实施例中，主控芯片321对第三收发芯片3223的信号的处理可参考上述对第一收发芯片3221和第二收发芯片3222的描述。主控芯片321从第一收发芯片3221、第二收发芯片3222和第三收发芯片3223三者的信号中进行比较和选择，原理相同，不再赘述。
在本申请的一个实施例中，第三天线313垂直于第一平面设置。如此，第一天线311、第二天线312和第三天线313于三维空间内两两相互垂直分布，可以保证无论周围环境中电磁波的方向如何，都能有效地接收到电磁波。
第三天线313的长度为四分之一波长。
此外，在本申请的一个实施例中，该信号收发终端还可包括相互连接的第四天线和第四收发芯片，第四收发芯片以与第一收发芯片3221至第三收发芯片3223均并联的方式连接至主控芯片321，主控芯片321还用于比较第一收发芯片3221至第四收发芯片的信号，并选择使用第一收发芯片3221、第二收发芯片3222、第三收发芯片3223还是第四收发芯片的数据。原理相同，不再赘述。
在本申请的一个实施例中，第四天线垂直于第一平面设置，且第四天线与第三天线313的朝向相反。
本申请实施例还提供一种无线监听系统(未图示)，包括上述各实施例所说的接收端，以及发射端(未图示)。其中，发射端用于向接收端发射包含音频信号的无线电磁波。
无线监听系统的接收端采用第一天线311和第二天线312同时接收信号，通过主控芯片321进行数据的比较和选择，能够保证电磁波信号的接收，且切换时间更短，保证切换前后数据的连续性，避免出现数据丢失造成的信号不连续，用户使用体验更佳。特别是在发射机6采用多次发送数据的发送方式的情况下，该接收端的信号接收可以实现实时零损失，信号接收质量尤佳。
以上仅为本申请的可选实施例而已，并不用于限制本申请。对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的权利要求范围之内。

Claims (20)

  1. 一种音频接收装置，其特征在于，所述音频接收装置包括呈内中空结构的第一外壳，设置于所述第一外壳内的PCB板和天线模块，以及与所述PCB板电连接的第一电池，所述天线模块与所述PCB板电性连接，用于耦合接收特定频段的电磁信号，且所述天线模块设置于所述PCB板的一侧的贴近所述外壳的位置。
  2. 根据权利要求1所述的音频接收装置，其特征在于，所述天线模块包括天线组，还包括主控芯片，以及信号处理芯片，所述天线组至少包括第一天线和第二天线，且所述第一天线和所述第二天线的极化方向互为交错，所述信号处理芯片电连接所述主控芯片且与所述第一天线和所述第二天线馈电连接，所述信号处理芯片用于对所述第一天线和所述第二天线接收到的信号进行放大与解调处理，以及将处理后的信号发送至所述主控芯片。
  3. 根据权利要求2所述的音频接收装置，其特征在于，所述第一天线和所述第二天线均为1/4天线。
  4. 根据权利要求3所述的音频接收装置，其特征在于，所述第一天线和所述第二天线均包括馈电端与末端，所述第一天线的馈电端和所述第二天线的馈电端之间的距离等于所述第二天线的特征波长的1/4。
  5. 根据权利要求2所述的音频接收装置，其特征在于，所述第一天线的馈电端正对所述第二天线的末端，所述第一天线和所述第二天线的极化方向互为交错。
  6. 根据权利要求2所述的音频接收装置，其特征在于，所述第一天线和所述第二天线均采用倒F天线。
  7. 根据权利要求2所述的音频接收装置，其特征在于，所述第一外壳包括外壳本体和天线罩，所述外壳本体形成一个容置槽，所述PCB板和所述天线模块置于所述容置槽内，所述天线罩采用高透波性的材料制成，所述天线模块设置于所述外壳本体内贴近所述天线罩的位置。
  8. 根据权利要求7所述的音频接收装置，其特征在于，所述天线罩呈矩形，所述第一天线和所述第二天线相互垂直，所述第一天线和所述第二天线紧贴矩形的所述天线罩相邻的两个边沿设置。
  9. 根据权利要求7所述的音频接收装置，其特征在于，所述第一天线沿水平方向设置，所述第二天线沿竖直方向设置，且所述第一天线和/或所述第二天线向所述天线罩的中间部分弯折。
  10. 根据权利要求1所述的音频接收装置，其特征在于，所述PCB板上设置有用于与播放设备连接的播放设备接口，所述PCB板上还设置有调音旋钮和调频按钮，所述调音旋钮和所述调频按钮伸出所述第一外壳。
  11. 根据权利要求1所述的音频接收装置，其特征在于，所述第一电池采用充电第一电池，所述PCB板上设置有与所述第一电池电连接的充电接口。
  12. 根据权利要求1所述的音频接收装置，其特征在于，所述音频接收装置还包括用于固定所述第一外壳的固定结构，所述固定结构连接所述第一外壳。
  13. 一种无线监听系统，其特征在于，所述无线监听系统包括如权利要求1音频接收装置，所述无线监听系统还包括发射总机和用于发射特定频道的信号的发射机，所述发射机与所述发射总机电连接，且所述发射机与所述音频接收装置无线信号连接。
  14. 根据权利要求13所述的无线监听系统，其特征在于，所述发射机包括第二外壳，设置于所述第二外壳内的发射天线和第二电池，所述第二电池用于向所述发射天线供能，所述发射机通过所述发射天线发射特定频道的信号，所述发射机还包括音频接口，所述发射机通过所述音频接口电连接所述发射总机。
  15. 根据权利要求14所述的无线监听系统，其特征在于，所述音频接口包括锁定弹片和抵接于所述锁定弹片的解锁按钮，所述锁定弹片将所述发射机锁定于所述发射总机相对应的接口，所述解锁按钮用于解除所述锁定弹片对所述发射机的锁定。
  16. 一种信号收发终端，其特征在于，包括：至少两个收发天线；至少两个收发芯片，所述收发芯片与所述收发天线一一对应连接；主控芯片，多个所述收发芯片并联地连接至所述主控芯片；所述主控芯片用于比较多个所述收发芯片的数据，并选择使用多个所述收发芯片中的其中一个的数据。
  17. 根据权利要求16所述的信号收发终端，其特征在于，所述收发芯片用于将来自所述收发天线的电信号转换为对应的模拟信号。
  18. 根据权利要求17所述的信号收发终端，其特征在于，所述信号收发终端还包括音频解码器和模数转换器，所述音频解码器连接于所述主控芯片，所述主控芯片用于将选择的数据发送至所述音频解码器，所述音频解码器用于解码还原来自所述主控芯片的数据，所述模数转换器将所述音频解码器所解码还原的数字信号转换为模拟信号；所述信号收发终端还包括放大器，所述放大器连接至所述模数转换器。
  19. 根据权利要求18所述的信号收发终端，其特征在于，所述收发天线和所述收发芯片的数量均为两个，所述主控芯片用于比较两个所述收发芯片的数据；或者，所述收发天线和所述收发芯片的数量均为三个，所述主控芯片用于比较三个所述收发芯片的数据。
  20. 根据权利要求19所述的信号收发终端，其特征在于，各所述收发天线相互垂直设置。
PCT/CN2020/103306 2019-10-31 2020-07-21 一种音频接收装置、无线监听系统及信号收发终端 WO2021082540A1 (zh)

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