An indoor telephone set

Abstract

The utility model discloses an indoor telephone, solve the single function technical problem of indoor telephone in the prior art. Including telephone main part and handle, the telephone is equipped with main control module, audio frequency module, microphone module, speech detection module, noise reduction module and power module, main control module with audio frequency module passes through audio frequency circuit connection, main control module with microphone module passes through microphone circuit connection, main control module with speech detection module passes through speech detection circuit connection, main control module with noise reduction module passes through noise reduction circuit connection, main control module with power module passes through power supply circuit connection, main control module embeds communication module, and main control module connects antenna module. The application expands the use function of telephone, satisfies the call demand of user and the guardianship demand of management party simultaneously. Can be widely used in telephone technology field.

Description

Technical Field

[0001] This utility model relates to the field of telephone technology, specifically to an indoor telephone. Background Technology

[0002] In the early stages of communication equipment development, traditional indoor phones, as basic voice interaction tools, were limited to enabling point-to-point calls—transmitting audio signals through lines to facilitate voice communication between users. Their technical architecture was simple and their functionality limited. However, with the rapid iteration of information technology and the increasing prevalence of various smart terminal devices, users' functional needs for indoor phones have expanded beyond basic calls to include diversification and scenario-based applications. This is especially true in the specific application scenario of school dormitories, where the functional limitations of traditional indoor phones have become increasingly apparent. The single function of traditional indoor phones can no longer meet the dual needs of users (students) and administrators in the school dormitory setting. Summary of the Invention

[0003] This utility model addresses the shortcomings and deficiencies of existing technologies by providing an indoor telephone that expands the telephone's functionality and simultaneously meets the user's calling needs and the administrator's monitoring needs.

[0004] To achieve the above objectives, this utility model provides the following technical solution: This application provides an indoor telephone, including a telephone body and a handset. The telephone is equipped with a main control module, an audio module, a microphone module, a voice detection module, a noise reduction module, and a power supply module. The main control module is connected to the audio module through an audio circuit, the main control module is connected to the microphone module through a microphone circuit, the main control module is connected to the voice detection module through a voice detection circuit, the main control module is connected to the noise reduction module through a noise reduction circuit, and the main control module is connected to the power supply module through a power supply circuit. The main control module has a built-in communication module and is connected to the antenna module.

[0005] Preferably, the audio module includes a receiver located on the handset and a speaker located on the main body of the phone, and the receiver and the speaker are connected to the main control module through a first switching switch.

[0006] Preferably, the microphone module includes a first microphone located on the handle and a second microphone located on the main body of the phone, and the first microphone and the second microphone are connected to the main control module through a second switch.

[0007] Preferably, the input terminal of the voice detection module is connected to the second microphone, and the output terminal of the voice detection module is connected to the main control module.

[0008] Preferably, the voice data input terminal of the noise reduction module is connected to the second microphone, and the voice data output terminal of the noise reduction module is connected to the second switch; the data interaction terminal of the noise reduction module is connected to the main control module through a UART interface.

[0009] Preferably, the second microphone is an array microphone, including a first array microphone and a second array microphone, wherein the distance between the first array microphone and the second array microphone is ≥5cm.

[0010] Preferably, the system further includes a card insertion module and a SIM card module. The card insertion module includes a card slot and a card insertion detection circuit, and the card insertion detection circuit is connected to the main control module.

[0011] Preferably, it also includes a display screen module and a keypad module located on the main body of the phone.

[0012] Preferably, the main control module has a built-in eSIM card slot.

[0013] This utility model has the following beneficial effects: The indoor telephone involved in this utility model constructs a core recognition unit by adding a voice detection module and optimizing the hardware configuration. On the one hand, the telephone body is equipped with a suitable array microphone, which, through reasonable layout, ensures full coverage of the indoor space. Whether it is a close-range daily call or a long-distance sound capture in an indoor scenario, it can effectively collect data, providing a comprehensive and complete sound signal source for voice detection and avoiding the omission of key sound information due to limited sound range. On the other hand, a noise reduction module is integrated to filter environmental interference, ensuring the purity of the voice signal and the accuracy of recognition. With the coordinated operation of the above modules, the indoor telephone can meet both daily call needs and the security monitoring needs of management in specific areas, breaking through the limitations of the single function of traditional telephones. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the frame structure of the indoor telephone shown in an embodiment of the present utility model; Figure 2 This is a schematic diagram of the main view structure of the indoor telephone shown in an embodiment of the present utility model; Figure 3 This is a bottom view structural diagram of the indoor telephone shown in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the main control module circuit connection of the indoor telephone shown in an embodiment of the present invention; Figure 5 This is a schematic diagram of the circuit connection of the voice detection module of the indoor telephone shown in an embodiment of the present utility model; Figure 6This is a schematic diagram of the second microphone circuit connection of the indoor telephone shown in an embodiment of the present invention; Figure 7 This is a schematic diagram of the noise reduction module circuit connection of the indoor telephone shown in an embodiment of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0017] Please see Figure 1-7 This utility model provides a technical solution: like Figure 1 As shown, this utility model provides an indoor telephone, including a telephone body and a handset. The telephone is equipped with a main control module, an audio module, a microphone module, a voice detection module, a noise reduction module, and a power supply module. The main control module is connected to the audio module through an audio circuit, the main control module is connected to the microphone module through a microphone circuit, the main control module is connected to the voice detection module through a voice detection circuit, the main control module is connected to the noise reduction module through a noise reduction circuit, and the main control module is connected to the power supply module through a power supply circuit. The main control module has a built-in communication module and is connected to the antenna module.

[0018] In the embodiments of this application, the main control module can be the Quectel EC800M-CN module, which is small in size, lightweight, highly reliable, and supports 4G LTE Cat-M1 / NB-IoT communication standards. The main control module is used to realize call control (on-hook / off-hook detection, audio channel switching), monitoring function triggering (keyword alarm signal processing), data transmission (alarm information, audio file upload), and module coordination (controlling the start and stop of the microphone, noise reduction, and voice detection modules).

[0019] The main control module's interfaces include a UART for connecting to the voice detection module, noise reduction module, and a reserved debugging serial port. The main control module's SPI interface is used to connect to the storage module for reading or writing recording files and configuration data. The main control module's GPIO interfaces are used to control audio channel switching, microphone channel switching, display module driver, and button detection.

[0020] Preferably, the audio module includes a receiver located on the handset and a speaker located on the main body of the phone, and the receiver and the speaker are connected to the main control module through a first switching switch.

[0021] In the embodiments of this application, the audio interface of the main control module provides one audio signal channel; the receiver and the speaker are connected to the main control module through a first switching switch, the control terminal (INI pin) of the first switching switch is connected to the GPIO pin of the main control module, and the receiver is switched when the handset is off-hook, and the speaker is switched when the handset is in hands-free mode.

[0022] Furthermore, the audio circuit of this application also includes an audio power amplifier chip, which can be an LPA4890 chip. Its IN+ / IN- pins are connected to the audio signal output by the main control module, the SPK P / SPK N pins are connected to the speaker, and the AP_EN pin (high level to enable, low level to disable) is connected to the GPIO of the main control module to realize the start and stop control of the power amplifier.

[0023] Preferably, the microphone module includes a first microphone located on the handle and a second microphone located on the main body of the phone, and the first microphone and the second microphone are connected to the main control module through a second switch.

[0024] In the embodiments of this application, the first microphone and the second microphone are connected to the main control module through a second electronic switch. The first microphone is used during calls by default, and the second microphone is used during security monitoring.

[0025] Preferably, the second microphone is an array microphone, including a first array microphone and a second array microphone, wherein the distance between the first array microphone and the second array microphone is ≥5cm.

[0026] like Figure 2 , Figure 3As shown in the embodiments of this application, the first array microphone and the second array microphone are respectively soldered to both sides of the PCB board of the phone body. The first array microphone is the main hands-free microphone, and the second array microphone is the auxiliary microphone. The main hands-free microphone hole is located on the front side of the phone body, and the auxiliary microphone is located on the upper side of the phone body. The second microphone can be a high-sensitivity electret type with a frequency response range of 20Hz-20kHz, which is suitable for the long-distance sound pickup needs of the dormitory environment. At the same time, both the main hands-free microphone and the auxiliary microphone adopt a sealed design to improve the sound pickup stability.

[0027] Preferably, the input terminal of the voice detection module is connected to the second microphone, and the output terminal of the voice detection module is connected to the main control module.

[0028] In the embodiments of this application, the voice detection module can use the Qiying Tailun CI1302 intelligent voice chip. This chip integrates a self-developed brain neural network processor (BNPU V3) and CPU core, with a system main frequency of 220MHz, built-in 640KByteSRAM, and supports neural network algorithms such as DNN / TDNN / RNN / CNN. The audio input terminals MICIN1, MICIN2, MICIN3, and MICIN4 of the voice detection module are microphone input channels, connected to the MICNL / MICPL and MICNR / MICPR pins of the second microphone to receive the raw voice signal; the MICBIAS pin is filtered by capacitors C66 and C75 to provide bias voltage for the microphone, ensuring microphone signal acquisition; pins 9 and 10 are connected to the EC800_RX and EC800_TX pins of the main control module for outputting keyword detection results (outputting a high-level alarm signal when a keyword is triggered); pins VDD3, VDD33, and VDD1 are connected to a 3.3V power supply to provide operating voltage for the chip; the CI1302 voice detection module can pre-store relevant keywords and supports offline voice detection. The communication module built into the main control module transmits the detection signal triggered by the voice detection module to the management platform via an antenna.

[0029] It should be noted that the speech detection in this application uses existing chip technology, and the keywords set can be set by the user. This application does not impose any restrictions on this.

[0030] Preferably, the voice data input terminal of the noise reduction module is connected to the second microphone, and the voice data output terminal of the noise reduction module is connected to the second switch; the data interaction terminal of the noise reduction module is connected to the main control module through a UART interface.

[0031] In the embodiments of this application, the noise reduction module may employ the POROSVOC PNC201 audio processing chip, which integrates microphone array technology, DNN neural network noise reduction algorithm, echo cancellation algorithm, and AGC automatic gain control algorithm. This effectively eliminates environmental noise, suppresses echo, and ensures stable signal strength for long-distance audio pickup. The audio input pins 45, 46, 47, and 48 of the noise reduction module are connected to the AIN1N, AIN1P, AIN0N, and AIN0P pins of the second microphone to receive the differential audio signal from the microphone. After filtering and amplification, the signal is input to the chip. The DAC_L and DAC_R pins output digital audio signals. The frequency signal, after passing through a filter circuit composed of resistors and capacitors, is output to the MIC_P and MIC_N interfaces, where it outputs the noise-reduced voice signal to the main control module. Simultaneously, a decoupling circuit composed of resistors (R122, R123) and capacitors (C140, C141) ensures the stability of the output signal. The UART1RX / PORTO1 and UARTORX / PORTO2 serial ports of the noise reduction module communicate with the main control module to configure algorithm parameters and provide status feedback. The VCC pin of the noise reduction module is connected to a 3.3V power supply, and the RESET pin is connected to a reset circuit to achieve the chip reset function.

[0032] Preferably, it further includes a card insertion module and a SIM card module, wherein the card insertion module includes a card slot and a card insertion detection circuit, and the card insertion detection circuit is connected to the main control module.

[0033] In the embodiments of this application, the card insertion module is used for users to insert cards into the card slot. The card insertion detection circuit identifies the card insertion status and transmits the signal to the main control module. The main control module controls the electronic switch via GPIO to switch the communication path to the external SIM card slot. If a built-in SIM card module is used, no switching is required, and the built-in path is used by default. The data (SIM_DAT), reset (SIM_RST), and clock (SIM_CLK) pins of the SIM card module are connected to the SIM_IO, SIM_RST, and SIM_CLK pins of the main control module, respectively, to form a stable communication signal transmission link. At the same time, D18 and D29 TVS anti-static devices are reserved to avoid electrostatic interference causing path interruption.

[0034] Preferably, it also includes a display screen module and a keypad module located on the main body of the phone.

[0035] In the embodiments of this application, the card insertion module, display module, and button module are arranged sequentially from top to bottom on the main body of the phone for user convenience.

[0036] Preferably, the main control module has a built-in eSIM card slot.

[0037] In the embodiments of this application, the built-in eSIM card slot is compatible with eSIM, and eSIM data can be remotely written through the management platform, enabling communication without the need for a physical card, thus reducing operation and maintenance costs.

[0038] It should be noted that the terminology used above is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0040] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0041] The above description is only a preferred embodiment of the present utility model. The protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An indoor telephone, comprising a telephone body and a handset, characterized in that, The phone includes a main control module, an audio module, a microphone module, a voice detection module, a noise reduction module, and a power supply module. The main control module is connected to the audio module via an audio circuit, the main control module is connected to the microphone module via a microphone circuit, the main control module is connected to the voice detection module via a voice detection circuit, the main control module is connected to the noise reduction module via a noise reduction circuit, and the main control module is connected to the power supply module via a power supply circuit. The main control module has a built-in communication module and is connected to the antenna module.

2. The indoor telephone according to claim 1, characterized in that, The audio module includes a receiver located on the handset and a speaker located on the main body of the phone. The receiver and the speaker are connected to the main control module via a first switching switch.

3. The indoor telephone according to claim 1, characterized in that, The microphone module includes a first microphone located on the handle and a second microphone located on the main body of the phone. The first microphone and the second microphone are connected to the main control module via a second switch.

4. The indoor telephone according to claim 3, characterized in that, The input terminal of the voice detection module is connected to the second microphone, and the output terminal of the voice detection module is connected to the main control module.

5. The indoor telephone according to claim 3, characterized in that, The voice data input terminal of the noise reduction module is connected to the second microphone, and the voice data output terminal of the noise reduction module is connected to the second switch; the data interaction terminal of the noise reduction module is connected to the main control module through a UART interface.

6. The indoor telephone according to claim 3, characterized in that, The second microphone is an array microphone, including a first array microphone and a second array microphone, and the distance between the first array microphone and the second array microphone is ≥5cm.

7. The indoor telephone according to claim 1, characterized in that, It also includes a card insertion module and a SIM card module. The card insertion module includes a card slot and a card insertion detection circuit, and the card insertion detection circuit is connected to the main control module.

8. The indoor telephone according to claim 1, characterized in that, It also includes a display module and a keypad module located on the main body of the phone.

9. The indoor telephone according to claim 1, characterized in that, The main control module has a built-in eSIM card slot.

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