Transceiving circuit for voice recognition module

Abstract

The utility model relates to the technical field of transceiving circuits, in particular to a transceiving circuit for a voice recognition module. The transceiving circuit comprises a transceiver D3, a pull-up resistor R9, a pull-down resistor R7, a terminal resistor R6, a TVS diode array U3, a transceiving indicator light D2 and a transceiving indicator light D4; the transceiver D3 is connected to the RS485 bus and is used for transmitting and receiving RS485 signals; the pull-up resistor R9 is connected between the A end of the transceiver D3 and the positive electrode of the power supply; and the pull-down resistor R7 is connected between the B end of the transceiver D3 and the negative electrode of the power supply. According to the utility model, through reasonable resistance design and impedance matching, external interference and signal reflection are effectively reduced, stable transmission of RS485 signals is ensured, the anti-interference capability and stability of the circuit are improved, and the circuit is suitable for complex working environments of mines. Multiple ESD protection measures and a voltage jump protection circuit effectively prevent static electricity and voltage fluctuation from damaging the circuit, and the durability of the circuit is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of transceiver circuits, in particular to a transceiver circuit for a voice recognition module. Background Art

[0002] Speech recognition technology refers to a technology that converts human language into computer-readable language. With the close integration of science and technology with people's daily production and life, speech recognition technology has developed rapidly in the past few years. In coal mines, speech recognition technology can be applied to miners' voice command recognition, voice alarm recognition and other aspects. In addition, speech recognition technology is integrated with speech synthesis technology to form a complete set of speech diagnosis and control systems, further improving the safety and production efficiency of miners.

[0003] However, the transceiver circuit of the existing speech recognition module has technical problems such as low recognition and processing efficiency and lack of protection circuit. Utility Model Content

[0004] The utility model aims at the technical problems existing in the prior art and provides a transceiver circuit for a voice recognition module to improve the recognition and processing efficiency of voice commands and protect the transceiver circuit at the same time.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] A transceiver circuit for a speech recognition module is provided, the transceiver circuit comprising:

[0007] Transceiver D3, pull-up resistor R9, pull-down resistor R7, terminal resistor R6, TVS diode array U3, transceiver indicator light D2 and transceiver indicator light D4;

[0008] The transceiver D3 is connected to the RS485 bus and is used for sending and receiving RS485 signals;

[0009] The pull-up resistor R9 is connected between the A terminal of the transceiver D3 and the positive electrode of the power supply;

[0010] The pull-down resistor R7 is connected between the B terminal of the transceiver D3 and the negative electrode of the power supply;

[0011] The terminal resistor R6 is connected in parallel between the A terminal and the B terminal of the transceiver D3 for impedance matching;

[0012] The TVS diode array U3 is connected between the A terminal and the B terminal of the transceiver D3 for ESD protection;

[0013] The transceiver indicator light D2 and the transceiver indicator light D4 are respectively connected to the transceiver indication pins of the transceiver D3 to indicate the transceiver status of the RS485 signal.

[0014] Furthermore, the resistance range of the pull-up resistor R9 and the pull-down resistor R7 is 4.7 kΩ to 10 kΩ.

[0015] Furthermore, the resistance of the terminal resistor R6 is 120Ω.

[0016] Furthermore, the breakdown voltage of the TVS diode array U3 is 6V to 7V.

[0017] Furthermore, the sending and receiving indicator light D2 and the sending and receiving indicator light D4 are bidirectional LEDs, which are used to indicate the sending and receiving status respectively.

[0018] Furthermore, the transceiver D3 is a half-duplex transceiver that complies with the RS485 standard.

[0019] Further, the transceiver circuit includes an ESD protection circuit, and the ESD protection circuit is connected to the A terminal and the B terminal of the transceiver D3;

[0020] The ESD protection circuit includes a plurality of TVS diodes connected in parallel between the A terminal and the B terminal of the transceiver D3.

[0021] Furthermore, the RS485 interface of the transceiver circuit includes a protection circuit for preventing damage to the circuit caused by voltage mutation;

[0022] The protection circuit includes a resettable fuse FU1 and a TVS diode VS1. The resettable fuse FU1 is connected in series to the power input line, and the TVS diode VS is connected in parallel to both ends of the power input.

[0023] The beneficial effects of the utility model are:

[0024] The utility model effectively reduces external interference and signal reflection through reasonable resistance design and impedance matching, ensures stable transmission of RS485 signals, improves the anti-interference ability and stability of the circuit, and is suitable for the complex working environment of mines. Multiple ESD protection measures and voltage mutation protection circuits effectively prevent static electricity and voltage fluctuations from damaging the circuit and improve the durability of the circuit. Through the design of the transceiver indicator light, maintenance personnel can monitor the working status of the equipment in real time, quickly locate faults, and improve maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. Examples of the embodiments are shown in the accompanying drawings, in which the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In addition, it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0027] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use scenarios of other materials.

[0029] The utility model provides the following preferred embodiments:

[0030] In order to solve the technical problems of low recognition and processing efficiency and lack of protection circuit in the existing transceiver circuit for voice recognition module, the utility model proposes a transceiver circuit for voice recognition module, which aims to improve the recognition and processing efficiency of voice commands, while enhancing the protection capability and stability of the circuit, and is suitable for the complex working environment of mines.

[0031] The transceiver circuit for the speech recognition module of this embodiment includes the following main parts: transceiver D3, pull-up resistor R9, pull-down resistor R7, terminal resistor R6, TVS diode array U3, transceiver indicator lights D2 and D4, resettable fuse FU1 and protection circuit.

[0032] Specifically, the transceiver D3 is the core component of the utility model, a half-duplex transceiver that complies with the RS485 standard, and is used to realize the transceiver function of the RS485 signal. The transceiver D3 is connected to the RS485 bus, and its A end and B end are respectively used to connect the pull-up resistor R9 and the pull-down resistor R7 to ensure the stability of the signal. The RS485 transceiver has high reliability and anti-interference ability, and is suitable for the harsh environment of the mine.

[0033] Furthermore, the pull-up resistor R9 and the pull-down resistor R7 have a resistance range of 4.7kΩ to 10kΩ, and are connected between the A terminal of the transceiver D3 and the positive power supply, and between the B terminal of the transceiver D3 and the negative power supply. It should be understood that this resistance design ensures stable signal transmission and effectively reduces the impact of external interference on the RS485 signal. At the same time, the selection of pull-up resistors and pull-down resistors helps maintain the integrity and reliability of the signal in various environments.

[0034] Furthermore, the terminal resistor R6 is connected in parallel between the A terminal and the B terminal of the transceiver D3, and its resistance is 120Ω, which is used to achieve impedance matching. It should be understood that impedance matching is the key to ensuring the quality of signal transmission. Through the terminal resistor R6, signal reflection and interference can be effectively prevented, and the transmission stability of the signal can be improved.

[0035] Furthermore, the TVS diode array U3 is connected between the A and B terminals of the transceiver D3 for ESD protection. The breakdown voltage of the TVS diode array is 6V to 7V, which can effectively absorb and dissipate electrostatic discharge energy and protect the circuit from electrostatic damage. It should be understood that electrostatic protection is particularly important in the complex electromagnetic environment of the mine, and the application of the TVS diode array enhances the anti-interference ability of the circuit.

[0036] Furthermore, the transceiver indicator lights D2 and D4 are respectively connected to the transceiver indication pins of the transceiver D3 to indicate the transceiver status of the RS485 signal. The transceiver indicator lights are bidirectional LEDs, which are used to indicate the sending and receiving status respectively. It should be understood that through the transceiver indicator lights, maintenance personnel can monitor the working status of the equipment in real time, quickly locate faults, and improve maintenance efficiency.

[0037] Furthermore, in order to further enhance the protection capability of the circuit, this embodiment includes a protection circuit, which is composed of a resettable fuse FU1 and a TVS diode VS1. The resettable fuse FU1 is connected in series to the power input line for overcurrent protection; the TVS diode VS1 is connected in parallel to both ends of the power input for surge protection. It should be understood that this protection circuit design can effectively prevent voltage mutations and overcurrent from damaging the circuit, and improve the durability and stability of the circuit.

[0038] Furthermore, the power circuit design of this embodiment further optimizes the power protection measures. The power circuit includes diodes V1, V2, a resettable fuse FU1, a TVS diode VS1, a filter capacitor C1 and a power overvoltage protector U1. Diodes V1 and V2 are connected in series to provide power protection and prevent the influence of reverse current on the circuit; the resettable fuse FU1 is connected in series to the power input line for overcurrent protection to prevent the damage of the circuit due to excessive current; the TVS diode VS1 is connected in parallel to both ends of the power input for surge protection to absorb the impact caused by the sudden change of current; the filter capacitor C1 is connected in parallel to both ends of the power input to filter out the power noise and ensure the purity of the power supply; the power overvoltage protector U1 is connected in series to the power input line for power overvoltage protection to prevent the influence of excessive voltage on the circuit.

[0039] Furthermore, in order to ensure the stable transmission and processing of audio signals, an audio isolation circuit is designed in this embodiment. The audio isolation circuit includes an audio transformer T1, coupling capacitors C4, C5, C6 and voltage-dividing resistors R2, R3, and R4. One end of the primary coil of the audio transformer T1 is connected to the audio input signal, and the other end is connected to the coupling capacitor C4 for isolating the DC component; the other end of the coupling capacitor C4 is grounded. One end of the secondary coil of the audio transformer T1 is connected to the coupling capacitor C5, and the other end is connected to the coupling capacitor C6 for further isolating the DC component; the other ends of the coupling capacitors C5 and C6 are respectively connected to the audio output signal and ground. The voltage-dividing resistors R2 and R3 are connected in series and in parallel at both ends of the secondary coil of the audio transformer T1 for stabilizing the audio signal voltage; the voltage-dividing resistor R4 is connected in parallel between the voltage-dividing resistors R2 and R3 for adjusting the audio signal voltage.

[0040] Furthermore, the voice recognition module of this embodiment is integrated with a transceiver circuit in the voice recognition module, connected to the main control machine through an RS485 interface, receives and analyzes the voice command from the loudspeaker phone, and converts the voice command into a string command and sends it to the main control machine. The main control machine performs corresponding operations according to the received command, and generates a feedback voice signal through the voice synthesis module, which is played to the on-site personnel through the loudspeaker phone. The entire system integrates multiple technologies such as voice recognition, signal processing and circuit protection, ensuring the efficient and stable operation of the system.

[0041] Furthermore, in practical applications, the voice recognition module transceiver circuit of this embodiment is widely used in mine belt protection systems. The mine environment is complex and changeable, and electromagnetic interference and electrostatic discharge are serious problems. Through the optimized design of this embodiment, the anti-interference ability and stability of the system are effectively improved. On-site maintenance personnel can send voice commands through the loudspeaker phone, and the system can quickly and accurately recognize and process the commands. Feedback information is generated and played through the voice synthesis module, which greatly improves the efficiency of fault diagnosis and processing.

[0042] Furthermore, the benefit of this embodiment is that, by optimizing the design of the transceiver circuit for the voice recognition module, multiple technical problems in the prior art are solved, the recognition and processing efficiency of voice commands is significantly improved, and the protection capability and stability of the circuit are enhanced, ensuring the reliable operation of the system in a complex mine environment. Through the innovative design of this embodiment, the mine belt protection system has achieved intelligence and automation in fault diagnosis and maintenance, improving the safety and production efficiency of miners.

[0043] The beneficial effects of the present invention are specifically embodied in that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A transceiver circuit for a speech recognition module, characterized in that: The transceiver circuit comprises: Transceiver D3, pull-up resistor R9, pull-down resistor R7, terminal resistor R6, TVS diode array U3, transceiver indicator light D2 and transceiver indicator light D4; The transceiver D3 is connected to the RS485 bus and is used for sending and receiving RS485 signals; The pull-up resistor R9 is connected between the A terminal of the transceiver D3 and the positive electrode of the power supply; The pull-down resistor R7 is connected between the B terminal of the transceiver D3 and the negative electrode of the power supply; The terminal resistor R6 is connected in parallel between the A terminal and the B terminal of the transceiver D3 for impedance matching; The TVS diode array U3 is connected between the A terminal and the B terminal of the transceiver D3 for ESD protection; The transceiver indicator light D2 and the transceiver indicator light D4 are respectively connected to the transceiver indication pins of the transceiver D3 to indicate the transceiver status of the RS485 signal.

2. The transceiver circuit for a speech recognition module according to claim 1, wherein: The resistance range of the pull-up resistor R9 and the pull-down resistor R7 is 4.7 kΩ to 10 kΩ.

3. The transceiver circuit for the speech recognition module according to claim 2, characterized in that: The resistance of the terminal resistor R6 is 120Ω.

4. The transceiver circuit for a speech recognition module according to claim 1, wherein: The breakdown voltage of the TVS diode array U3 is 6V to 7V.

5. The transceiver circuit for a speech recognition module according to claim 1, wherein: The sending and receiving indicator light D2 and the sending and receiving indicator light D4 are bidirectional LEDs, which are used to indicate the sending and receiving status respectively.

6. The transceiver circuit for a speech recognition module according to claim 1, wherein: The transceiver D3 is a half-duplex transceiver that complies with the RS485 standard.

7. The transceiver circuit for a speech recognition module according to claim 1, wherein: The transceiver circuit includes an ESD protection circuit, and the ESD protection circuit is connected to the A terminal and the B terminal of the transceiver D3; The ESD protection circuit includes a plurality of TVS diodes connected in parallel between the A terminal and the B terminal of the transceiver D3.

8. The transceiver circuit for a speech recognition module according to claim 1, wherein: The RS485 interface of the transceiver circuit includes a protection circuit for preventing damage to the circuit caused by voltage mutation; The protection circuit includes a resettable fuse FU1 and a TVS diode VS1. The resettable fuse FU1 is connected in series to the power input line, and the TVS diode VS is connected in parallel to both ends of the power input.

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