Voice wireless talkback doorbell

Abstract

The utility model relates to a wireless doorbell, in particular to a voice wireless talkback doorbell. The system comprises a host arranged inside a door and an extension arranged outside the door, each of the host and the extension comprises a voice communication unit and an operation unit, the host further comprises a first MCU main control unit, and the extension further comprises a second MCU main control unit. According to the utility model, the highly integrated 2.4 G voice chip is adopted, the anti-interference capability is strong, long-distance voice transmission is supported, the high-fidelity CD tone quality with the transmission distance of more than 50m can be ensured, the high-fidelity CD tone quality is stable, sound distortion and multi-band selection are not caused by the transmission distance, and the indoor host automatically starts recording after being called and automatically ends recording after speaking is finished. And convenient voice communication is realized, so that the use is convenient.

Description

Technical Field

[0001] This invention relates to a wireless doorbell, and more specifically, to a voice wireless intercom doorbell. Background Technology

[0002] Wireless doorbells, also known as wireless remote control doorbells or remote control doorbells, commonly include battery-free wireless doorbells, ordinary wireless doorbells, and video wireless doorbells. Wireless doorbells are a type of doorbell developed using civilian wireless technologies such as Zigbee, WIFI, Bluetooth, and 2.4G.

[0003] For example, CN109584485A describes a wireless doorbell, comprising a transmitter and a receiver. The transmitter includes a button with an independent housing and a transmitting antenna with an independent housing. The button and transmitting antenna are connected by a wire. The transmitting antenna housing encapsulates the transmitting antenna, and the button housing encapsulates the button. In use, the button is installed outside the door, and the transmitting antenna is installed inside the door. This wireless doorbell bypasses the security door, making it easier for the receiver to receive the signal. However, when the homeowner is not in the room, guests need to wait outside for several minutes, wasting their time. Alternatively, if the homeowner is in the room but is busy and unable to open the door immediately, guests may mistakenly believe the homeowner is not in the room and leave, making it inconvenient to use.

[0004] Therefore, a wireless intercom doorbell capable of voice communication is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a voice wireless intercom doorbell to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides a voice-activated wireless intercom doorbell, comprising a main unit installed inside the door and a secondary unit installed outside the door. Both the main unit and the secondary unit include a voice communication unit and an operation unit. The main unit further includes a first MCU main control unit, and the secondary unit further includes a second MCU main control unit. The voice communication unit includes an audio output module and a 2.4G wireless voice communication module. The operation unit includes a button input module, a microphone input module, and a battery charging module. The first MCU main control unit or the second MCU main control unit is connected to the audio output module, the 2.4G wireless voice communication module, the button input module, the microphone input module, and the battery charging module.

[0007] As a further improvement to this technical solution, the audio output module includes an audio power amplifier output circuit, which includes a chip U3 and a terminal J5, wherein:

[0008] Pin 1 of chip U3 is connected to resistor R7 and then to the SPK_EN terminal;

[0009] Pin 2 of the chip U3 is connected to capacitor C13, and capacitor C13 is connected to the other end of resistor R7 and grounded;

[0010] Pin 3 of the chip U3 is connected to resistor R4, resistor R4 is connected to capacitor C8, and capacitor C8 is connected to the DACO terminal.

[0011] Pin 4 of chip U3 is connected to resistor R5, resistor R5 is connected to capacitor C11, capacitor C11 is connected to resistor R6 and grounded, and resistor R6 is grounded.

[0012] Pin 5 of the chip U3 is connected to inductor L2, inductor L2 is connected to pin 2 of terminal J5 and capacitor C12 is connected to terminal J5 and grounded;

[0013] Pin 6 of chip U3 is connected to capacitor C7 and capacitor C9. Capacitor C7 is connected to the other end of capacitor C9, capacitor C10 and ground.

[0014] Pin 7 of the chip U3 is grounded;

[0015] Pin 8 of the chip U3 is connected to inductor L1, and inductor L1 is connected to the other end of capacitor C10 and to pin 1 of terminal J5.

[0016] As a further improvement to this technical solution, the battery charging module includes a battery charge / discharge protection circuit, which includes a chip U2 and a terminal J2, wherein:

[0017] Pin 2 of chip U2 is connected to capacitor C25 and resistor R11, and resistor R11 is grounded;

[0018] Pin 3 of the chip U2 is connected to resistor R2, and resistor R2 is connected to the other end of capacitor C25 and then to pin 3 of terminal J2.

[0019] Pins 4 and 5 of the chip U2 are both grounded;

[0020] Pin 1 of terminal J2 is connected to resistor R3, and resistor R3 is grounded;

[0021] Pin 2 of terminal J2 is connected to capacitors C22, C23, and C24. Capacitor C22 is connected to the other end of capacitor C23 and the other end of capacitor C24 and grounded.

[0022] As a further improvement to this technical solution, the MIC input module includes a microphone voice input circuit, which includes a chip J7.

[0023] Pin 1 of chip J7 is connected to the MIC_BIAS terminal;

[0024] Pins 2 and 3 of the chip J7 are both grounded;

[0025] The 4th pin of the chip J7 is connected to capacitor C18, and capacitor C18 is connected to the MICIN terminal.

[0026] As a further improvement to this technical solution, the 2.4G wireless voice communication module includes a chip RFU1.

[0027] Pins 1, 10, and 11 of the chip RFU1 are all connected to the RF33V terminal;

[0028] Pins 2, 5, 8, 20, and 25 of the chip RFU1 are all grounded;

[0029] Pin 3 of the chip RFU1 is connected to the XTA terminal;

[0030] Pin 4 of the chip RFU1 is connected to the XTB terminal;

[0031] The capacitor RFC29 at pin 7 of the chip RFU1 is connected in parallel with the inductor RFL9, and the capacitor RFC29 is grounded.

[0032] Pin 9 of the chip RFU1 is connected to the other end of the inductor RFL9;

[0033] Pin 13 of the chip RFU1 is connected to the RF_INT terminal, pin 14 is connected to the RF_BUSY terminal, pin 15 is connected to the RF_RST terminal, and pin 24 is connected to the RF_VPA terminal.

[0034] Pin 16 of the chip RFU1 is connected to the SPI_MISO terminal, pin 17 is connected to the SPI_MOSI terminal, pin 18 is connected to the SPI_SCK terminal, and pin 19 is connected to the SPI_NSS terminal.

[0035] Pin 21 of the chip RFU1 is connected to the RFI_P terminal, and pin 22 is connected to the RFI_N terminal;

[0036] Pin 23 of the chip RFU1 is connected to the RFO terminal.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] This wireless intercom doorbell uses a highly integrated 2.4G voice chip, which has strong anti-interference capabilities and supports long-distance voice transmission. It can guarantee high-fidelity CD-quality sound quality at a transmission distance of over 50m, and is stable without sound distortion caused by transmission distance. It has multiple frequency bands to choose from, and the indoor unit automatically starts recording after being called and automatically stops recording after speaking, realizing convenient voice communication and making it easy to use. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0040] Figure 2 This is a schematic diagram of the host circuit of the present invention;

[0041] Figure 3 This is a block diagram illustrating the principle of the extension unit in this invention;

[0042] Figure 4 This is the audio power amplifier output circuit diagram of the present invention;

[0043] Figure 5 This is a circuit diagram of the battery charge / discharge protection circuit of the present invention;

[0044] Figure 6 This is a circuit diagram of the microphone voice input for the present invention;

[0045] Figure 7 This is a circuit diagram of the 2.4G wireless voice communication module of the present invention. Detailed Implementation

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] With the increasing number of urban dwellings, doorbells have become an indispensable electronic device in people's daily lives, primarily used to knock on the door when guests arrive. Traditional doorbells typically consist of a button on the outside and a speaker on the inside. When someone presses the doorbell, the speaker plays a ringing sound to alert the person inside. However, when the homeowner is not home, guests have to wait outside for several minutes, wasting their time. Conversely, if the homeowner is home but busy and unable to open the door immediately, guests may mistakenly assume the homeowner is not home and leave. Furthermore, doorbells with only a ringing sound are inconvenient for houses with yards, as they don't immediately identify the visitor.

[0049] Some existing doorbells have voice call functions, but both the indoor main unit and the outdoor extension unit require pressing a button to record the conversation. When the homeowner is busy inside, they may not be able to respond to guests outside in time, causing guests to wait longer. Therefore, a doorbell with voice intercom function and automatic recording capability is proposed.

[0050] Please see Figures 1-7 As shown, the purpose of this embodiment is to provide a voice wireless intercom doorbell, including a main unit installed inside the door and a secondary unit installed outside the door. Both the main unit and the secondary unit include a voice communication unit and an operation unit. The main unit also includes a first MCU main control unit, and the secondary unit also includes a second MCU main control unit. The voice communication unit includes an audio output module and a 2.4G wireless voice communication module. The operation unit includes a button input module, a microphone input module, and a battery charging module. The first MCU main control unit or the second MCU main control unit is connected to the audio output module, the 2.4G wireless voice communication module, the button input module, the microphone input module, and the battery charging module.

[0051] The button input module is used for recording, adjusting volume, and changing channels. The host's button input module includes a recording button and a channel adjustment button, while the slave's button input module includes a recording button and a configuration button. The host connects wirelessly to the slave via a 2.4G wireless voice communication module.

[0052] Both the host's first MCU main control unit and the slave's second MCU main control unit are connected to the battery charging module.

[0053] The audio output module includes an audio power amplifier output circuit, which comprises chip U3 and terminal J5, wherein:

[0054] Pin 1 of chip U3 is connected to resistor R7 and then to the SPK_EN terminal;

[0055] Pin 2 of chip U3 is connected to capacitor C13, and capacitor C13 is connected to the other end of resistor R7 and grounded;

[0056] Pin 3 of chip U3 is connected to resistor R4, resistor R4 is connected to capacitor C8, and capacitor C8 is connected to the DACO terminal.

[0057] Pin 4 of chip U3 is connected to resistor R5, resistor R5 is connected to capacitor C11, capacitor C11 is connected to resistor R6 and grounded, and resistor R6 is grounded.

[0058] Pin 5 of chip U3 is connected to inductor L2. Inductor L2 is connected to pin 2 of terminal J5 and capacitor C12 is connected in parallel. Capacitor C12 is connected to terminal J5 and grounded.

[0059] Pin 6 of chip U3 is connected to capacitor C7 and capacitor C9. Capacitor C7 is connected to the other end of capacitor C9, capacitor C10 is connected to ground.

[0060] Pin 7 of chip U3 is grounded;

[0061] Pin 8 of chip U3 is connected to inductor L1, and inductor L1 is connected to the other end of capacitor C10 and then connected to pin 1 of terminal J5.

[0062] The battery charging module includes a battery charge / discharge protection circuit, which comprises a chip U2 and a terminal J2, wherein:

[0063] Pin 2 of chip U2 is connected to capacitor C25 and resistor R11, and resistor R11 is grounded.

[0064] Pin 3 of chip U2 is connected to resistor R2, and resistor R2 is connected to the other end of capacitor C25 and then connected to pin 3 of terminal J2.

[0065] Pins 4 and 5 of chip U2 are grounded;

[0066] Pin 1 of terminal J2 is connected to resistor R3, and resistor R3 is grounded;

[0067] Pin 2 of terminal J2 is connected to capacitors C22, C23, and C24. Capacitor C22 is connected to the other end of capacitor C23 and the other end of capacitor C24 and grounded.

[0068] The MIC input module includes a microphone voice input circuit, which includes chip J7.

[0069] Pin 1 of chip J7 is connected to the MIC_BIAS terminal;

[0070] Pins 2 and 3 of chip J7 are both grounded;

[0071] Connect capacitor C18 to pin 4 of chip J7, and connect capacitor C18 to the MICIN terminal.

[0072] The 2.4G wireless voice communication module includes the RFU1 chip.

[0073] Pins 1, 10, and 11 of chip RFU1 are all connected to the RF33V terminal;

[0074] Pins 2, 5, 8, 20, and 25 of chip RFU1 are all grounded;

[0075] Pin 3 of chip RFU1 is connected to the XTA terminal;

[0076] Pin 4 of chip RFU1 is connected to the XTB terminal;

[0077] The capacitor RFC29 at pin 7 of chip RFU1 is connected in parallel with the inductor RFL9, and capacitor RFC29 is grounded.

[0078] Pin 9 of chip RFU1 is connected to the other end of inductor RFL9;

[0079] Pin 13 of chip RFU1 is connected to the RF_INT terminal, pin 14 is connected to the RF_BUSY terminal, pin 15 is connected to the RF_RST terminal, and pin 24 is connected to the RF_VPA terminal.

[0080] Pin 16 of chip RFU1 is connected to the SPI_MISO terminal, pin 17 is connected to the SPI_MOSI terminal, pin 18 is connected to the SPI_SCK terminal, and pin 19 is connected to the SPI_NSS terminal.

[0081] Pin 21 of chip RFU1 is connected to the RFI_P terminal, and pin 22 is connected to the RFI_N terminal;

[0082] Pin 23 of chip RFU1 is connected to the RFO terminal.

[0083] In this embodiment, the transmitting part is the host of the control system, and the receiving part is the slave of the control system. The host and slave are wirelessly connected through a communication module. The communication mode between the host and slave is one-to-one. After the slave and host are paired, the host and slave establish a communication channel. The slave's second MCU main control unit sends a command to the communication module to put it into a low-power receiving state.

[0084] This implementation uses LoRa radio frequency technology for communication, allowing users to speak and send messages simultaneously. The host device automatically enters recording mode after receiving a message from the slave device, and automatically stops recording when no one is speaking.

[0085] In this embodiment of a voice wireless intercom doorbell, during actual use, the microphone input module of the host collects sound, which is processed by the voice processing module to convert the analog sound signal into a digital signal and input to the first MCU main control unit. The first MCU main control unit packages and processes this part of the voice data and transmits it to the 2.4G wireless voice communication module through the SPI interface. Then, the 2.4G wireless voice communication module sends this part of the voice signal out at a specific frequency band, thus completing the entire voice transmission function.

[0086] When the slave device receives the voice signal sent by the master device, it automatically wakes up the second MCU master control unit and transmits the received data to the second MCU master control unit via SPI communication. The second MCU master control unit amplifies the signal through the audio output module and then plays it out through the speaker.

[0087] When the host receives the voice signal from the slave device, it processes the audio signal in the same way. After playback, the host will automatically enter the recording state. Based on the data output by the ADC of the first MCU chip, it will determine whether the owner has spoken. Recording will automatically stop 2 seconds after the owner finishes speaking and the audio will be sent to the slave device.

[0088] In summary, this utility model is small in size, easy to use, has strong anti-interference capabilities, a long transmission distance, and can automatically recognize and record speech for transmission. Therefore, this utility model effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0089] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A voice-activated wireless intercom doorbell, characterized in that: The device includes a main unit located inside the door and a secondary unit located outside the door. Both the main unit and the secondary unit include a voice communication unit and an operation unit. The main unit also includes a first MCU main control unit, and the secondary unit also includes a second MCU main control unit. The voice communication unit includes an audio output module and a 2.4G wireless voice communication module. The operation unit includes a key input module, a microphone input module, and a battery charging module. The first MCU main control unit or the second MCU main control unit is connected to the audio output module, the 2.4G wireless voice communication module, the key input module, the microphone input module, and the battery charging module.

2. The voice wireless intercom doorbell according to claim 1, characterized in that: The audio output module includes an audio power amplifier output circuit, which includes a chip U3 and a terminal J5, wherein: Pin 1 of chip U3 is connected to resistor R7 and then to the SPK_EN terminal; Pin 2 of the chip U3 is connected to capacitor C13, and capacitor C13 is connected to the other end of resistor R7 and grounded; Pin 3 of the chip U3 is connected to resistor R4, resistor R4 is connected to capacitor C8, and capacitor C8 is connected to the DACO terminal. Pin 4 of chip U3 is connected to resistor R5, resistor R5 is connected to capacitor C11, capacitor C11 is connected to resistor R6 and grounded, and resistor R6 is grounded. Pin 5 of the chip U3 is connected to inductor L2, inductor L2 is connected to pin 2 of terminal J5 and capacitor C12 is connected to terminal J5 and grounded; Pin 6 of chip U3 is connected to capacitor C7 and capacitor C9. Capacitor C7 is connected to the other end of capacitor C9, capacitor C10 and ground. Pin 7 of the chip U3 is grounded; Pin 8 of the chip U3 is connected to inductor L1, and inductor L1 is connected to the other end of capacitor C10 and to pin 1 of terminal J5.

3. The voice wireless intercom doorbell according to claim 1, characterized in that: The battery charging module includes a battery charge / discharge protection circuit, which includes a chip U2 and a terminal J2, wherein: Pin 2 of chip U2 is connected to capacitor C25 and resistor R11, and resistor R11 is grounded; Pin 3 of the chip U2 is connected to resistor R2, and resistor R2 is connected to the other end of capacitor C25 and then to pin 3 of terminal J2. Pins 4 and 5 of the chip U2 are both grounded; Pin 1 of terminal J2 is connected to resistor R3, and resistor R3 is grounded; Pin 2 of terminal J2 is connected to capacitors C22, C23, and C24. Capacitor C22 is connected to the other end of capacitor C23 and the other end of capacitor C24 and grounded.

4. The voice wireless intercom doorbell according to claim 1, characterized in that: The MIC input module includes a microphone voice input circuit, which includes a chip J7. Pin 1 of chip J7 is connected to the MIC_BIAS terminal; Pins 2 and 3 of chip J7 are both grounded; The 4th pin of the chip J7 is connected to capacitor C18, and capacitor C18 is connected to the MICIN terminal.

5. The voice wireless intercom doorbell according to claim 1, characterized in that: The 2.4G wireless voice communication module includes a chip RFU1. Pins 1, 10, and 11 of the chip RFU1 are all connected to the RF33V terminal; Pins 2, 5, 8, 20, and 25 of the chip RFU1 are all grounded; Pin 3 of the chip RFU1 is connected to the XTA terminal; Pin 4 of the chip RFU1 is connected to the XTB terminal; The capacitor RFC29 at pin 7 of the chip RFU1 is connected in parallel with the inductor RFL9, and the capacitor RFC29 is grounded. Pin 9 of the chip RFU1 is connected to the other end of the inductor RFL9; Pin 13 of the chip RFU1 is connected to the RF_INT terminal, pin 14 is connected to the RF_BUSY terminal, pin 15 is connected to the RF_RST terminal, and pin 24 is connected to the RF_VPA terminal. Pin 16 of the chip RFU1 is connected to the SPI_MISO terminal, pin 17 is connected to the SPI_MOSI terminal, pin 18 is connected to the SPI_SCK terminal, and pin 19 is connected to the SPI_NSS terminal. Pin 21 of the chip RFU1 is connected to the RFI_P terminal, and pin 22 is connected to the RFI_N terminal; Pin 23 of the chip RFU1 is connected to the RFO terminal.

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