Novel hands-free intercom

Abstract

The utility model discloses a novel hands-free intercom, aims at providing a novel hands-free intercom that can intercom more than five parties and is compatible with on-site debugging. The utility model discloses an input power, voltage stabilizing module, MCU control processing module, intercom module, ringing circuit, loudspeaker, microphone, the input of voltage stabilizing module is connected with input power, the output of voltage stabilizing module is connected with MCU control processing module, intercom module and ringing circuit all are connected with MCU control processing module, the loudspeaker is connected with ringing circuit, intercom module module includes power amplifier circuit and the talk control circuit that is connected with power amplifier circuit, the loudspeaker and microphone all are connected with talk control circuit, talk control circuit is the hands-free talk integrated circuit of MC34118 model. The utility model discloses a novel hands-free intercom technical field of intercom.

Description

Technical Field

[0001] This utility model relates to an elevator communication intercom technology, and in particular to a novel hands-free intercom. Background Technology

[0002] Existing traditional elevator hands-free intercoms, when paired with other intercoms, can only support a maximum of five-way communication. Supporting more than five-way intercoms requires multiple sets, leading to cumbersome installation and complex functionality. This also increases the likelihood of audio and call quality issues, necessitating troubleshooting and repair, ultimately impacting elevator operation and service. For example, a traditional five-way intercom can only connect to one hands-free intercom; connecting an additional set results in low volume, unstable calls, and intermittent communication, making it impossible to call or communicate when people are trapped in the elevator. Furthermore, traditional hands-free intercoms only use the 2822 amplifier circuit, resulting in unstable call quality and noise. When adjusting the call volume of traditional hands-free intercoms, the supplier must bring parts to the site for debugging, severely impacting passenger usability. Moreover, the limited availability of spare parts restricts on-site flexibility. Additionally, in emergency situations requiring communication with the outside world, poor call quality with traditional hands-free intercoms can hinder timely information transmission, impacting rescue progress. Therefore, there is an urgent need to design a hands-free intercom that can connect more than five parties and is compatible with on-site debugging. This would solve call quality and sound problems on-site, thereby reducing the cost of elevator assembly and maintenance and better serving elevator maintenance personnel and passengers. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a new type of hands-free walkie-talkie that can connect to more than five parties and is compatible with on-site debugging.

[0004] The technical solution adopted by this utility model is as follows: This utility model includes an input power supply, a voltage regulator module, an MCU control processing module, an intercom module, a ringing circuit, a speaker, and a microphone; the input terminal of the voltage regulator module is connected to the input power supply, the output terminal of the voltage regulator module is connected to the MCU control processing module, the intercom module and the ringing circuit are both connected to the MCU control processing module, and the speaker is connected to the ringing circuit; the intercom module includes a power amplifier circuit and a call control circuit connected to the power amplifier circuit, the speaker and the microphone are both connected to the call control circuit, and the call control circuit is an MC34118 hands-free calling integrated circuit.

[0005] Furthermore, the input power supply is a DC 12V supply voltage.

[0006] Furthermore, the MCU control processing module is an APM8S007E4U MCU control circuit.

[0007] Furthermore, the voltage regulator module is an XL1509 voltage regulator circuit.

[0008] Furthermore, the power amplifier circuit is a TDA2822 dual-channel low-power power amplifier circuit. Attached Figure Description

[0009] Figure 1 This is a frame diagram of a novel hands-free walkie-talkie. Figure 2 This is a diagram illustrating a multi-party communication connection. Figure 3 This is the circuit diagram of a voltage regulator module; Figure 4 This is the circuit diagram of the MCU control and processing module; Figure 5 This is the circuit diagram for the ringing circuit; Figure 6 Yes, it's the circuit diagram for the TDA2822 power amplifier. Figure 7 This is the circuit diagram of the MC34118 call control circuit. Detailed Implementation

[0010] like Figures 1 to 7 As shown, in this embodiment, the present invention includes an input power supply, a voltage regulator module, an MCU control processing module, an intercom module, a ringing circuit, a speaker, and a microphone. The input terminal of the voltage regulator module is connected to the input power supply, and the output terminal of the voltage regulator module is connected to the MCU control processing module. The intercom module and the ringing circuit are both connected to the MCU control processing module, and the speaker is connected to the ringing circuit. The intercom module includes a power amplifier circuit and a call control circuit connected to the power amplifier circuit. The speaker and the microphone are both connected to the call control circuit, which is an MC34118 hands-free calling integrated circuit. The MCU control processing module is an APM8S007E4U MCU control circuit.

[0011] DC12V power supply voltage: External DC12V voltage, compatible with existing DC12V five-way intercom systems.

[0012] Voltage Regulator Module: Converts the DC 12V input power from the external power converter into the required DC 5.0V voltage internally. The voltage regulator module is an XL1509 voltage regulator circuit. MCU Control Processing Module: Controls the operation of each module and the transmission of information.

[0013] Intercom module: Composed of a 2822 power amplifier module and an MC34118 intercom control circuit. The power amplifier circuit is a TDA2822 dual-channel low-power power amplifier circuit. In the existing intercom function, the main unit answers calls from the car's auxiliary unit by pressing a button, and the car's auxiliary unit can passively trigger the corresponding main unit to initiate a call.

[0014] 2822 power amplifier module: Dual-channel audio power amplifier circuit, which amplifies the sound required by the speakers and microphones according to the gain ratio to achieve the ideal sound decibel requirements.

[0015] MC34118 Call Control Circuit: The MC34118 chip is a quasi-duplex hands-free voice conversion chip that can improve the dual-channel gain of the speaker and microphone to achieve quasi-duplex communication. On the other hand, the 34118 can be used to detect the attenuation of the dial tone.

[0016] In this embodiment, the hands-free host uses the MC34118 control circuit to improve the dual-channel gain of the speaker and microphone, achieving quasi-duplex communication, and can also detect dial tone attenuation. This invention solves the problem that traditional walkie-talkies can only connect a maximum of 5 products (5-way intercom system), and can be expanded to 13-way intercom. It adopts the new MC34118 hands-free communication control circuit, improving call quality and reducing noise generation. Furthermore, adjustable potentiometers are used in the three parts of the call, allowing for quick adjustment of the call volume during 5-way intercom compatibility debugging, improving debugging progress and reducing previous intercom anomalies caused by call problems, thus improving the service effect of elevator use and increasing customer satisfaction.

[0017] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. A new type of hands-free walkie-talkie, characterized in that: The novel hands-free walkie-talkie includes a voltage regulator module, an MCU control processing module, a walkie-talkie module, a ringing circuit, a speaker, and a microphone. The input terminal of the voltage regulator module is connected to an input power supply, and the output terminal of the voltage regulator module is connected to the MCU control processing module. The walkie-talkie module and the ringing circuit are both connected to the MCU control processing module, and the speaker is connected to the ringing circuit. The walkie-talkie module includes a power amplifier circuit and a call control circuit connected to the power amplifier circuit. The speaker and the microphone are both connected to the call control circuit, which is an MC34118 hands-free call integrated circuit.

2. The novel hands-free walkie-talkie according to claim 1, characterized in that: The input power supply is a DC 12V supply voltage.

3. The novel hands-free walkie-talkie according to claim 1, characterized in that: The MCU control processing module is an APM8S007E4U MCU control circuit.

4. The novel hands-free walkie-talkie according to claim 1, characterized in that: The voltage regulator module is an XL1509 voltage regulator circuit.

5. The novel hands-free walkie-talkie according to claim 1, characterized in that: The power amplifier circuit is a TDA2822 dual-channel low-power power amplifier circuit.

Images