Wireless tour guide explainer

Abstract

The utility model discloses a wireless tour guide explainer which comprises a voice transmitter and a voice receiver, the voice transmitter is provided with a first main control chip, the voice receiver is provided with a second main control chip, and an electromagnetic coil connected with the first main control chip is arranged in the voice transmitter. A magnetic reed sensor capable of interacting with the electromagnetic coil is arranged in the voice receiver; the magnetic reed sensor is arranged in a switching circuit connected with a second main control chip of the voice receiver, and when the electromagnetic coil is close to the magnetic reed sensor, the magnetic reed sensor triggers the switching circuit and enables the switching circuit to be switched on; when the switching circuit is switched on, a communication signal is sent to the second main control chip of the voice receiver, and when the second main control chip of the voice receiver receives the communication signal, communication matching of the voice receiver is executed. Compared with the prior art, rapid matching of the voice transmitter and the voice receiver can be realized.

Description

Technical Field

[0001] The utility model relates to a tour guide earphone product, in particular to a wireless tour guide interpreter. Background Art

[0002] Travel agencies and tour guides lead tours, scenic spots and museums rent tour guide equipment, etc. When scenic spots and museums rent tour guides, the voice transmitter and voice receiver must be matched before they can be used. When they are returned after use, they will be very messy. When they are recycled and rented again, they need to be re-paired due to the different number of tourists, which will take some time for the rented tourists to wait.

[0003] Therefore, how to improve the matching speed between the voice transmitter and the voice receiver in the wireless tour guide is a technical problem that needs to be solved urgently in the industry. Utility Model Content

[0004] Aiming at the problem in the prior art that the matching speed between a voice transmitter and a voice receiver is slow, the utility model proposes a wireless tour guide.

[0005] The technical solution of the utility model is to propose a wireless tour guide, comprising: a voice transmitter and a voice receiver, wherein the voice transmitter has a first main control chip, and the voice receiver has a second main control chip, and is characterized in that an electromagnetic coil connected to the first main control chip is arranged in the voice transmitter, and a magnetic reed sensor that can interact with the electromagnetic coil is arranged in the voice receiver;

[0006] The reed sensor is arranged in a switch circuit connected to the second main control chip of the voice receiver, and when the electromagnetic coil approaches the reed sensor, the reed sensor triggers the switch circuit and turns it on;

[0007] When the switch circuit is turned on, a communication signal is sent to the second main control chip of the voice receiver. When the second main control chip of the voice receiver receives the communication signal, communication matching is performed on the voice receiver.

[0008] Furthermore, the voice transmitter is composed of: a microphone, an analog-to-digital converter, a first main control chip, a radio frequency amplifier, a transmitting antenna, a first battery pack, and an electromagnetic coil;

[0009] The microphone is connected to the analog-to-digital converter, the first main control chip, and the radio frequency amplifier in sequence and then connected to the transmitting antenna;

[0010] The first battery pack is simultaneously connected to the analog-to-digital converter, the first main control chip, and the radio frequency amplifier for power supply;

[0011] The electromagnetic coil is connected to the first main control chip.

[0012] Furthermore, the voice receiver is composed of: a receiving antenna, a frequency selection filter, a second main control chip, a digital-to-analog converter, a speaker, a reed sensor, and a second battery pack;

[0013] Wherein, the receiving antenna is connected to the frequency selection filter, the second main control chip, the digital-to-analog converter in sequence and then connected to the speaker;

[0014] The second battery pack is simultaneously connected to the frequency selection filter, the second main control chip, and the digital-to-analog converter for power supply;

[0015] The reed sensor is connected to the second main control chip.

[0016] Furthermore, the second main control chip adopts IN310 chip or IN680 chip;

[0017] The digital-to-analog converter is mounted on the ES8311 chip.

[0018] Further, the switch circuit includes: a resistor R24, a resistor R26, a resistor R28, a switch SW1, a switch SW, and a reed sensor TIG;

[0019] One end of the reed sensor TIG is connected in series with the resistor R26 and then connected to the GPIOD-2-0 pin of the second main control chip, and the other end of the reed sensor TIG is grounded;

[0020] One end of the switch SW1 is connected to a 3.3V power supply, and the other end of the switch SW1 is connected in series with the resistor R28 and then connected to the GPIOD-3-4 pin of the second main control chip;

[0021] One end of the switch SW2 is connected in series with the resistor R24 ​​and then connected to the GPIOD-4-1 pin of the second main control chip, and the other end of the switch SW2 is grounded.

[0022] Furthermore, the voice receiver also includes a power supply circuit, which includes: a connection terminal P1, a voltage conversion chip U1, a voltage conversion chip U2, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C9;

[0023] The voltage conversion chip U1 adopts the ASM1117 chip, and the voltage conversion chip U2 adopts the XC6228 chip;

[0024] The IN pin of the voltage conversion chip U1 is connected to the IN pin of the voltage conversion chip U2, the GND pin of the voltage conversion chip U1 is connected in series with the resistor R4 and then grounded, and the two OUT pins of the voltage conversion chip U1 are connected to the second main control chip for power supply, and connected to the capacitor C3 and then grounded;

[0025] The SS pin of the voltage conversion chip U2 is grounded, the CE pin of the voltage conversion chip U2 is connected in series with the resistor R6 and then connected to the GPIOM-2-2 pin of the second main control chip, the OUT pin of the voltage conversion chip U2 is connected to the second main control chip for power supply, and is connected to the capacitor C9 and then grounded;

[0026] The first end of the connection terminal P1 is grounded, and the second end is connected between the IN pin of the voltage conversion chip U1 and the IN pin of the voltage conversion chip U2;

[0027] One end of the resistor R7 is connected between the resistor R6 and the CE pin of the voltage conversion chip U2, and the other end of the resistor R7 is grounded.

[0028] Furthermore, the voice receiver also includes a first display circuit connected to the second main control chip, and the first display circuit includes: a resistor R1, a resistor R2, a resistor R3, a light-emitting diode DS1, a light-emitting diode DS2, a charging management chip U3, and a connection terminal J1;

[0029] Wherein, the BAT pin of the charging management chip U3 is connected to the second battery pack, the PROG pin of the charging management chip U3 is connected in series with the resistor R3 and then grounded, and the GND pin of the charging management chip U3 is grounded;

[0030] One end of the resistor R1 is connected to a 5V voltage input via a USB, the other end of the resistor R1 is connected to the positive electrode of the light-emitting diode DS1, and the negative electrode of the light-emitting diode DS1 is connected to the STDBY pin of the charging management chip U3;

[0031] One end of the resistor R2 is connected to a 5V voltage input via a USB, the other end of the resistor R2 is connected to the positive electrode of the light-emitting diode DS2, and the negative electrode of the light-emitting diode DS2 is connected to the CHRG pin of the charging management chip U3;

[0032] The VCC port of the wiring terminal J1 is connected to a 5V voltage input via a USB, and the VSS port is grounded.

[0033] Furthermore, the voice receiver further comprises a second display circuit connected to the frequency-selective filter, and the second display circuit comprises: a resistor R23, a resistor R27, a light-emitting diode D1, and a light-emitting diode D2;

[0034] One end of the resistor R23 is connected to the GPIOD-3-3 pin of the second main control chip, the other end of the resistor R23 is connected to the positive electrode of the light-emitting diode D1, and the negative electrode of the light-emitting diode D1 is grounded;

[0035] One end of the resistor R27 is connected to the GPIOD-3-2 pin of the second main control chip, and the other end of the resistor R27 is connected to the positive electrode of the light-emitting diode D2, and the negative electrode of the light-emitting diode D2 is grounded.

[0036] Furthermore, the IN310 chip or the IN680 chip has at least one filter pin connected to a filter circuit, and the filter circuit is used to filter out interference signals in radio signals.

[0037] Compared with the prior art, the utility model has at least the following beneficial effects:

[0038] The utility model can match the voice transmitter with the voice receiver when the voice transmitter is close to the voice receiver through the arrangement of the electromagnetic coil, the reed sensor and the switch circuit, thereby improving the matching speed between the voice transmitter and the voice receiver and reducing the queuing time and length of tourists who rent tour guide interpreters. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0040] Figure 1 This is a schematic diagram of the module connection of the utility model as a whole;

[0041] Figure 2 A topological diagram of the IN310 chip used by the first main control chip and the second main control chip in the utility model;

[0042] Figure 3 It is a topological diagram of the digital-to-analog converter in the utility model;

[0043] Figure 4 A schematic diagram of the circuit topology of the switch circuit of the utility model;

[0044] Figure 5It is a circuit topology schematic diagram of the power supply circuit of the utility model;

[0045] Figure 6 It is a circuit topology diagram of the first display circuit of the utility model;

[0046] Figure 7 It is a circuit topology diagram of the second display circuit of the utility model. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the utility model, rather than implying that each embodiment of the utility model must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0049] The principle and structure of the present utility model are described in detail below with reference to the accompanying drawings and embodiments.

[0050] When scenic spots and museums rent out tour guide interpreters, the voice transmitter and voice receiver must be matched before they can be used. When they are returned after use, they will be in a mess. When they are rented out again, they need to be re-paired due to the different number of tourists, which will take some time for the renting tourists to wait.

[0051] In view of the above problems, the design idea of ​​the utility model is that, through the setting of the electromagnetic coil, the reed sensor, and the switch circuit, when the electromagnetic coil and the reed sensor are sensed to be close to each other, the switch circuit is triggered, and then a communication signal is provided to the reed sensor for matching the voice transmitter and the voice receiver, thereby achieving the effect of improving the matching speed of the voice transmitter and the voice receiver in the wireless tour guide.

[0052] Specifically, the wireless tour guide device proposed in the utility model comprises: a voice transmitter and a voice receiver, wherein the voice transmitter has a first main control chip, and the voice receiver has a second main control chip, and is characterized in that an electromagnetic coil connected to the first main control chip is provided in the voice transmitter, and a magnetic reed sensor that can interact with the electromagnetic coil is provided in the voice receiver;

[0053] The reed sensor is arranged in a switch circuit connected to the second main control chip of the voice receiver, and when the electromagnetic coil approaches the reed sensor, the reed sensor triggers the switch circuit and turns it on;

[0054] When the switch circuit is turned on, a communication signal is sent to the second main control chip of the voice receiver. When the second main control chip of the voice receiver receives the communication signal, communication matching is performed on the voice receiver.

[0055] Its working principle is that when the voice transmitter and the voice receiver need to be matched, a coded magnetic pulse signal is provided to the electromagnetic coil through the first main control chip. At this time, you only need to move the voice receiver close to the voice transmitter to trigger the switch circuit through the reed sensor, and then provide the corresponding communication signal to the second main control chip to complete the matching.

[0056] Here, the first main control chip can trigger the electromagnetic coil by setting a corresponding switch button on the voice transmitter.

[0057] See also Figure 1 The voice transmitter in the utility model is composed of: a microphone, an analog-to-digital converter, a first main control chip, a radio frequency amplifier, a transmitting antenna, a first battery pack, and an electromagnetic coil;

[0058] The microphone is connected to the analog-to-digital converter, the first main control chip, the radio frequency amplifier and then to the transmitting antenna;

[0059] The first battery pack is simultaneously connected to the analog-to-digital converter, the first main control chip, and the radio frequency amplifier for power supply;

[0060] The electromagnetic coil is connected to the first main control chip.

[0061] Here, the microphone is used to receive voice input, the analog-to-digital converter is used to convert the analog signal of the voice input into an electrical signal, the first main control chip is used to control the operation of the entire voice transmitter and provide a radio frequency signal, and the radio frequency amplifier is used to amplify the radio frequency signal and transmit the radio frequency signal through the transmitting antenna;

[0062] The first electromagnetic package is used to supply power to the analog-to-digital converter, the first main control chip, and the radio frequency amplifier to maintain the operation of the analog-to-digital converter, the first main control chip, and the radio frequency amplifier, and the electromagnetic coil is used to achieve matching with the voice receiver.

[0063] See also Figure 1 ,The voice receiver is composed of: a receiving antenna, a frequency selection filter, a second main control chip, a digital to analog converter, a speaker, a reed sensor, and a second battery pack;

[0064] The receiving antenna is sequentially connected to the frequency selection filter, the second main control chip, the digital-to-analog converter, and then to the speaker;

[0065] The second battery pack is simultaneously connected to the frequency selection filter, the second main control chip, and the digital-to-analog converter for power supply;

[0066] The reed sensor is connected to the second main control chip.

[0067] Here, the receiving antenna is used to receive the radio frequency signal sent by the transmitting antenna of the voice transmitter, the frequency selection filter is used to select the audio signal of a specific frequency for filtering and then send it to the second main control chip, the second main control chip is used to control the work of the entire voice receiver and provide radio frequency signals, the digital-to-analog converter is used to convert the digital signal into an analog signal and send it out through the speaker to provide corresponding sounds for tourists;

[0068] The second battery pack is used to supply power to the frequency selection filter, the second main control chip, and the digital-to-analog converter to maintain the operation of the frequency selection filter, the second main control chip, and the digital-to-analog converter. The reed sensor is used to achieve matching with the voice transmitter.

[0069] See also Figure 2 and Figure 3 In the present invention, the second main control chip adopts IN310 chip or IN680 chip;

[0070] The digital-to-analog converter is based on the ES8311 chip.

[0071] See also Figure 4 , the switch circuit in the utility model includes: resistor R24, resistor R26, resistor R28, switch SW1, switch SW, reed sensor TIG;

[0072] One end of the reed sensor TIG is connected in series with a resistor R26 and then connected to the GPIOD-2-0 pin of the second main control chip, and the other end of the reed sensor TIG is grounded;

[0073] One end of the switch SW1 is connected to the 3.3V power supply, and the other end of the switch SW1 is connected in series with a resistor R28 and then connected to the GPIOD-3-4 pin of the second master control chip;

[0074] One end of the switch SW2 is connected in series with a resistor R24 ​​and then connected to the GPIOD-4-1 pin of the second master control chip, and the other end of the switch SW2 is grounded.

[0075] here, Figure 4The KEY TIG in the utility model is also the reed sensor TIG in the utility model. When it receives the electrical signal sent by the electromagnetic coil, it will trigger and turn on the switches SW1 and SW2. Since the switches SW1 and SW2 are both connected to the second main control chip, and the switch SW1 is also connected to the 3.3V power supply, after the switch SW1 is turned on, the second main control chip can receive the corresponding communication signal and perform communication matching on the voice receiver when receiving the communication signal.

[0076] It can be seen that the utility model can complete the matching of the voice transmitter and the voice receiver when the voice transmitter is close to the voice receiver through the setting of the electromagnetic coil, the reed sensor, and the switch circuit, thereby improving the matching speed of the voice transmitter and the voice receiver and reducing the waiting time and length of the tourists who rent the tour guide interpreter.

[0077] See also Figure 5 The voice receiver also includes a power supply circuit, which includes: a wiring terminal P1, a voltage conversion chip U1, a voltage conversion chip U2, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C9;

[0078] Among them, the voltage conversion chip U1 adopts the ASM1117 chip, and the voltage conversion chip U2 adopts the XC6228 chip;

[0079] The IN pin of the voltage conversion chip U1 is connected to the IN pin of the voltage conversion chip U2, the GND pin of the voltage conversion chip U1 is connected in series with a resistor R4 and then grounded, and the two OUT pins of the voltage conversion chip U1 are connected to the second main control chip for power supply and to the capacitor C3 and then grounded;

[0080] The SS pin of the voltage conversion chip U2 is grounded, the CE pin of the voltage conversion chip U2 is connected in series with a resistor R6 and then connected to the GPIOM-2-2 pin of the second main control chip, the OUT pin of the voltage conversion chip U2 is connected to the second main control chip for power supply, and is connected to a capacitor C9 and then grounded;

[0081] A first end of the connection terminal P1 is grounded, and a second end is connected between an IN pin of the voltage conversion chip U1 and an IN pin of the voltage conversion chip U2;

[0082] One end of the resistor R7 is connected between the resistor R6 and the CE pin of the voltage conversion chip U2 , and the other end of the resistor R7 is grounded.

[0083] Here, the voltage conversion chip U1 has two OUT pins. Since the connection method of the two OUT pins is the same, they are uniformly described as one OUT pin in the above text. The function of the voltage conversion chip U1 here is to convert the charging voltage into a 3.3V voltage that can be charged by the digital-to-analog converter, and the function of the voltage conversion chip U2 is to convert the charging voltage into a voltage that can be charged by the second main control chip.

[0084] See also Figure 6 The voice receiver also includes a first display circuit connected to the second main control chip, and the first display circuit includes: a resistor R1, a resistor R2, a resistor R3, a light-emitting diode DS1, a light-emitting diode DS2, a charging management chip U3, and a connection terminal J1;

[0085] Among them, the BAT pin of the charging management chip U3 is connected to the second battery pack, the PROG pin of the charging management chip U3 is connected in series with the resistor R3 and then grounded, and the GND pin of the charging management chip U3 is grounded;

[0086] One end of the resistor R1 is connected to a 5V voltage input via USB, the other end of the resistor R1 is connected to the positive electrode of the light-emitting diode DS1, and the negative electrode of the light-emitting diode DS1 is connected to the STDBY pin of the charging management chip U3;

[0087] One end of the resistor R2 is connected to a 5V voltage input through a USB, the other end of the resistor R2 is connected to the positive electrode of the light-emitting diode DS2, and the negative electrode of the light-emitting diode DS2 is connected to the CHRG pin of the charging management chip U3;

[0088] The VCC port of the wiring terminal J1 is connected to the 5V voltage input through the USB, and the VSS port is grounded.

[0089] Here, the STDBY pin is connected to the battery charging completion indication terminal of the charging management chip U3, and the light emitting diode DS1 is connected to the STDBY pin, which is used to display when the utility model completes charging to remind the user that charging is completed;

[0090] The CHRG pin is connected to the charging status indication terminal of the charging management chip U3, and the light emitting diode DS2 is connected to the CHRG pin, which is used to display when the utility model is in the charging state to remind the user.

[0091] See also Figure 7 The voice receiver further includes a second display circuit connected to the frequency selection filter, the second display circuit includes: a resistor R23, a resistor R27, a light emitting diode D1, and a light emitting diode D2;

[0092] One end of the resistor R23 is connected to the GPIOD-3-3 pin of the second main control chip, and the other end of the resistor R23 is connected to the positive electrode of the light-emitting diode D1, and the negative electrode of the light-emitting diode D1 is grounded;

[0093] One end of the resistor R27 is connected to the GPIOD-3-2 pin of the second main control chip, and the other end of the resistor R27 is connected to the positive electrode of the light-emitting diode D2, and the negative electrode of the light-emitting diode D2 is grounded.

[0094] Here, the second display circuit is connected to the frequency selective filter and is mainly used to display the communication status of the frequency selective filter.

[0095] Since there is clutter interference in the input radio signal, the IN310 chip or IN680 chip in the utility model has at least one filter pin connected to a filter circuit, and the filter circuit is used to filter out the interference signal in the radio signal.

[0096] See also Figure 2 The VSW pin of the second main control chip is a filter pin, and the inductor L3, inductor L4, and capacitor C28 connected thereto form an LC filter circuit for filtering out input interference signals.

[0097] Similarly, the VDDIO1 pin and the VDDIO2 pin are also filter pins, and the capacitors C23, C24, C26, and C27 connected thereto are filter circuits for filtering out input interference signals;

[0098] The VDD-AMS pin is also a filter pin, and the inductor L1, capacitor C14, and capacitor 15 connected thereto form an LC filter circuit for filtering out input interference signals.

[0099] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0100] The utility model can match the voice transmitter with the voice receiver when the voice transmitter is close to the voice receiver through the arrangement of the electromagnetic coil, the reed sensor and the switch circuit, thereby improving the matching speed between the voice transmitter and the voice receiver and reducing the queuing time and length of tourists who rent tour guide interpreters.

[0101] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wireless tour guide, comprising: A voice transmitter and a voice receiver, wherein the voice transmitter has a first main control chip, and the voice receiver has a second main control chip, characterized in that an electromagnetic coil connected to the first main control chip is provided in the voice transmitter, and a magnetic reed sensor that can interact with the electromagnetic coil is provided in the voice receiver; The reed sensor is arranged in a switch circuit connected to the second main control chip of the voice receiver, and when the electromagnetic coil approaches the reed sensor, the reed sensor triggers the switch circuit and turns it on; When the switch circuit is turned on, a communication signal is sent to the second main control chip of the voice receiver. When the second main control chip of the voice receiver receives the communication signal, communication matching is performed on the voice receiver.

2. The wireless tour guide according to claim 1, characterized in that: The voice transmitter is composed of: a microphone, an analog-to-digital converter, a first main control chip, a radio frequency amplifier, a transmitting antenna, a first battery pack, and an electromagnetic coil; The microphone is connected in sequence to the analog-to-digital converter, the first main control chip, and the radio frequency amplifier The device is then connected to the transmitting antenna; The first battery pack is simultaneously connected to the analog-to-digital converter, the first main control chip, and the radio frequency amplifier for power supply; The electromagnetic coil is connected to the first main control chip.

3. The wireless tour guide according to claim 2, characterized in that: The voice receiver is composed of: a receiving antenna, a frequency selection filter, a second main control chip, a digital-to-analog converter, a speaker, a reed sensor, and a second battery pack; Wherein, the receiving antenna is connected to the frequency selection filter, the second main control chip, the digital-to-analog converter in sequence and then connected to the speaker; The second battery pack is simultaneously connected to the frequency selection filter, the second main control chip, and the digital-to-analog converter for power supply; The reed sensor is connected to the second main control chip.

4. The wireless tour guide according to claim 3, characterized in that: The second main control chip adopts IN310 chip or IN680 chip; The digital-to-analog converter is mounted on the ES8311 chip.

5. The wireless tour guide according to claim 4, characterized in that: The switch circuit includes: a resistor R24, a resistor R26, a resistor R28, a switch SW1, a switch SW2, and a reed sensor TIG; One end of the reed sensor TIG is connected in series with the resistor R26 and then connected to the GPIOD-2-0 pin of the second main control chip, and the other end of the reed sensor TIG is grounded; One end of the switch SW1 is connected to a 3.3V power supply, and the other end of the switch SW1 is connected in series with the resistor R28 and then connected to the GPIOD-3-4 pin of the second main control chip; One end of the switch SW2 is connected in series with the resistor R24 ​​and then connected to the GPIOD-4-1 pin of the second main control chip, and the other end of the switch SW2 is grounded.

6. The wireless tour guide according to claim 4, characterized in that: The voice receiver also includes a power supply circuit, which includes: a connection terminal P1, a voltage conversion chip U1, a voltage conversion chip U2, a resistor R4, a resistor R6, a resistor R7, a capacitor C3, and a capacitor C9; The voltage conversion chip U1 adopts the ASM1117 chip, and the voltage conversion chip U2 adopts the XC6228 chip; The IN pin of the voltage conversion chip U1 is connected to the IN pin of the voltage conversion chip U2, the GND pin of the voltage conversion chip U1 is connected in series with the resistor R4 and then grounded, and the two OUT pins of the voltage conversion chip U1 are connected to the second main control chip for power supply, and connected to the capacitor C3 and then grounded; The SS pin of the voltage conversion chip U2 is grounded, the CE pin of the voltage conversion chip U2 is connected in series with the resistor R6 and then connected to the GPIOM-2-2 pin of the second main control chip, the OUT pin of the voltage conversion chip U2 is connected to the second main control chip for power supply, and is connected to the capacitor C9 and then grounded; The first end of the connection terminal P1 is grounded, and the second end is connected between the IN pin of the voltage conversion chip U1 and the IN pin of the voltage conversion chip U2; One end of the resistor R7 is connected between the resistor R6 and the CE pin of the voltage conversion chip U2, and the other end of the resistor R7 is grounded.

7. The wireless tour guide according to claim 4, characterized in that: The voice receiver also includes a first display circuit connected to the second main control chip, the first display circuit includes: a resistor R1, a resistor R2, a resistor R3, a light emitting diode DS1, a light emitting diode DS2, a charging management chip U3, and a connection terminal J1; Wherein, the BAT pin of the charging management chip U3 is connected to the second battery pack, the PROG pin of the charging management chip U3 is connected in series with the resistor R3 and then grounded, and the GND pin of the charging management chip U3 is grounded; One end of the resistor R1 is connected to a 5V voltage input via a USB, the other end of the resistor R1 is connected to the positive electrode of the light-emitting diode DS1, and the negative electrode of the light-emitting diode DS1 is connected to the STDBY pin of the charging management chip U3; One end of the resistor R2 is connected to a 5V voltage input via a USB, the other end of the resistor R2 is connected to the positive electrode of the light-emitting diode DS2, and the negative electrode of the light-emitting diode DS2 is connected to the CHRG pin of the charging management chip U3; The VCC port of the wiring terminal J1 is connected to a 5V voltage input via a USB, and the VSS port is grounded.

8. The wireless tour guide according to claim 4, characterized in that: The voice receiver also includes a second display circuit connected to the frequency selection filter, the second display circuit includes: a resistor R23, a resistor R27, a light emitting diode D1, and a light emitting diode D2; One end of the resistor R23 is connected to the GPIOD-3-3 pin of the second main control chip, the other end of the resistor R23 is connected to the positive electrode of the light-emitting diode D1, and the negative electrode of the light-emitting diode D1 is grounded; One end of the resistor R27 is connected to the GPIOD-3-2 pin of the second main control chip, and the other end of the resistor R27 is connected to the positive electrode of the light-emitting diode D2, and the negative electrode of the light-emitting diode D2 is grounded.

9. The wireless tour guide according to claim 4, characterized in that: The IN310 chip or the IN680 chip has at least one filter pin connected to a filter circuit, and the filter circuit is used to filter out interference signals in radio signals.

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