WO2023077629A1 - 一种盲人语音过街提示器系统 - Google Patents

一种盲人语音过街提示器系统 Download PDF

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WO2023077629A1
WO2023077629A1 PCT/CN2021/139494 CN2021139494W WO2023077629A1 WO 2023077629 A1 WO2023077629 A1 WO 2023077629A1 CN 2021139494 W CN2021139494 W CN 2021139494W WO 2023077629 A1 WO2023077629 A1 WO 2023077629A1
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voice
module
circuit
control module
main control
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PCT/CN2021/139494
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English (en)
French (fr)
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褚衍波
姜飞跃
赵凯
张方奇
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无锡安邦电气股份有限公司
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Publication of WO2023077629A1 publication Critical patent/WO2023077629A1/zh

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/005—Traffic control systems for road vehicles including pedestrian guidance indicator

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  • the application relates to the field of traffic equipment, in particular to a voice crossing prompter system for the blind.
  • the voice prompter for the blind has been widely used as a humanized transportation device, which provides convenience for the blind to travel.
  • most of the voice prompters for the blind in the market currently have a single function, and the prompt sound will affect the normal life of the surrounding residents.
  • the present application provides a voice prompter system for the blind, which can automatically adjust the output volume of the speaker according to the time period or the ambient noise level.
  • a voice crossing prompter system for the blind comprising:
  • MCU main control module controls the entire prompter system
  • the phase acquisition module, the output terminal is electrically connected with the MCU main control module, and is used to obtain the current phase information of the signal machine;
  • Noise acquisition module the output end is electrically connected with the MCU main control module, and is used to collect the environmental noise level of the scene;
  • Voice module the input end is electrically connected with the MCU main control module, used to store voice files, convert them into electrical signals and amplify them;
  • a loudspeaker the input terminal is electrically connected to the voice module for playing voice
  • a clock module the output end of which is electrically connected to the MCU main control module to provide a clock source for the MCU main control module;
  • the power module provides working power for the entire prompter system.
  • a power-off storage module which is electrically connected to the MCU main control module and is used to save the set period parameters, signal lamp status information and phase power-off information.
  • the noise collection module includes a noise collection circuit, a noise amplification circuit and a control circuit, the input end of the noise amplification circuit is electrically connected to the noise collection circuit, and the control circuit is electrically connected to the noise amplification circuit.
  • the noise amplifying circuit includes a proportional operational amplifier and a filter circuit, and the output terminal of the proportional operational amplifier 3 is electrically connected to the input terminal of the filter circuit.
  • the filter circuit includes a first Schottky diode, a second Schottky diode, a third capacitor and a fifth resistor, and the first Schottky diode and the second Schottky diode are forward connected in series, so The third capacitor and the fifth resistor are connected in parallel with the first Schottky diode and the second Schottky diode connected in series in the forward direction, and the connection point between the first Schottky diode and the second Schottky diode is connected to the filter circuit 4 output terminals.
  • a second capacitor is arranged between the proportional operational amplifier and the filter circuit, which is used for shielding the DC bias of the previous stage.
  • control circuit includes a fourth resistor and a triode, the base of the triode is connected in series with the fourth resistor, the collector is connected to the filter circuit, and the emitter is grounded.
  • a communication module which is electrically connected to the MCU main control module, including a serial port RS232, a GPS module, a wireless module and a network port.
  • the voice module includes a SPWM filter circuit, a voice drive circuit and a power amplifier circuit, the input terminal of the SPWM filter circuit inputs a square wave, the output terminal is connected to the power amplifier circuit, the voice drive circuit is connected to the MCU main control module, and the output terminal is connected to power amplifier circuit.
  • the voice prompter for the blind can work in automatic mode and fixed mode.
  • the output volume is changed according to the ambient noise
  • the voice output is performed according to the volume of the preset time period.
  • the working mode can be switched flexibly, and supports mobile phone APP, computer host computer and button modification.
  • the voice prompter for the blind can automatically increase or decrease the volume of the output voice by detecting the environmental noise. When the environmental noise is high, the prompter will increase the voice output volume accordingly. When the environmental noise is small, the prompter will reduce the corresponding voice output volume. It will not affect the lives of the surrounding residents.
  • the voice prompter for the blind has an extended network interface, supports the remote call function, and can be used as a network broadcast terminal in emergency and emergency situations.
  • Fig. 1 is a functional block diagram of the present application.
  • FIG. 2 is a functional block diagram of the environmental noise collection circuit of the present application.
  • the present application includes: power supply module, MCU main control module, noise acquisition module, phase acquisition module, voice module, loudspeaker, clock module, power supply module, MCU main control module as the whole prompt
  • the central processing module of the controller is used to control the entire system.
  • the output terminals of the phase acquisition module and the noise acquisition module are electrically connected to the MCU main control module.
  • the phase acquisition module is used to obtain the current phase information of the signal machine, and the noise acquisition module is used to collect the environmental noise level of the site.
  • the input end of the voice module is electrically connected to the MCU main control module, and the output end is electrically connected to the speaker.
  • the voice module includes a voice chip and an audio amplifier circuit, and the speaker is used to play voice.
  • the clock module the output end of which is electrically connected to the MCU main control module, provides a clock source for the MCU main control module.
  • the power module provides working power for the entire prompter system.
  • the present application can further set up a communication module, which is electrically connected to the MCU main control module, and includes a serial port RS232, a GPS module, a wireless module and a network port.
  • the serial port RS232 communicates with the upper computer software, supports online time adjustment and modification of system working parameter information; the GPS module provides offline time adjustment and remote positioning functions for the clock module; expands the network interface and supports remote calling.
  • the application can further set a power-off storage module, which is electrically connected to the MCU main control module, and can save the set period parameters, signal lamp status information and phase power-off information in time when the power is off.
  • the noise collection module of the present application is shown in Figure 2, comprising a noise collection circuit 1, a noise amplification circuit and a control circuit 2, the input end of the noise amplification circuit is electrically connected to the noise collection circuit 1, and the control circuit 2 Electrically connected to the noise amplifier circuit.
  • the noise collection circuit 1 includes a microphone MIC and a resistor R1. The resistor R1 is pulled up to a power supply to provide a stable signal output for the MIC.
  • the noise amplifying circuit may adopt the structure shown in FIG. 2 , including a proportional operational amplifier 3 and a filter circuit 4 .
  • the output terminal of the proportional operational amplifier 3 is electrically connected to the input terminal of the filter circuit 4 .
  • the proportional operational amplifier 3 can adopt the structure in Fig. 2: comprising the second resistor R2, the third resistor R3 and the first operational amplifier U1A, the two ends of the third resistor R3 are respectively connected to the negative input terminal of the first operational amplifier U1A and On the positive input end, one end of the second resistor R2 is electrically connected to the negative input end of the first operational amplifier U1A, and the other end is grounded.
  • the output terminal of the first operational amplifier U1A is connected to the input terminal of the filter circuit 4 .
  • the proportional operational amplifier 3 amplifies the weak electric signal collected by the microphone in proportion.
  • a first capacitor C1 is provided at the grounding end of the second resistor R2, and the first capacitor C1 is coupled to the ground.
  • the filter circuit 4 includes a first Schottky diode D1, a second Schottky diode D2, a third capacitor C3 and a fifth resistor R5, the first Schottky diode D1 and the second Schottky
  • the special diode D2 is forward connected in series, and the connection point of the first Schottky diode D1 and the second Schottky diode D2 is used as the input terminal of the filter circuit 4 and connected to the output terminal of the proportional operational amplifier 3 .
  • the third capacitor C3 and the fifth resistor R5 are connected in parallel with the first Schottky diode D1 and the second Schottky diode D2 in forward series, and the anode of the first Schottky diode D1 is grounded.
  • the filter circuit 4 filters the amplified noise, and the MCU main control module samples the filtered stable noise signal through the ADC (the MIC_AD signal in FIG. 2 is a stable noise signal).
  • a second capacitor C2 is arranged between the proportional operational amplifier 3 and the filter circuit 4 for shielding the DC bias of the previous stage, that is, shielding the DC bias of the proportional operational amplifier 3 .
  • control circuit 2 includes a fourth resistor R4 and a transistor Q1, the base of the transistor Q1 is connected in series with the fourth resistor R4, the collector is connected to the input terminal of the filter circuit, and the emitter is grounded.
  • the opposite end of the fourth resistor R4 and the base of the transistor Q1 is connected to the main control module of the MCU, and the control signal is EN_AD in FIG. 2 .
  • the voice module includes a SPWM filter circuit 5, a voice drive circuit 6 and a power amplifier circuit 7, the input terminal of the SPWM filter circuit 5 inputs a square wave, and the output terminal is connected to the power amplifier circuit 7,
  • the voice drive circuit 6 is connected to the MCU main control module, and the output end is connected to the power amplifier circuit 7 .
  • the SPWM filter circuit 5 includes a thirtieth resistor R30, a thirty-fifth resistor R35, a thirty-sixth resistor R36, a thirty-sixth capacitor C36, and a second operational amplifier U10B, and one end of the thirtieth resistor R30 is connected to 3.3 V power supply, the other end is connected to one end of the thirty-fifth resistor R35 and the thirty-sixth resistor R36, the other end of the thirty-fifth resistor R35 is grounded, and the other end of the thirty-sixth resistor R36 is connected to the positive terminal of the second operational amplifier U10B input.
  • the first end of the thirty-sixth capacitor is connected to the positive input end of the second operational amplifier U10B, and the other end is grounded.
  • the negative input terminal of the second operational amplifier U10B is short-circuited to the output terminal and the output terminal is connected to the thirty-first resistor R31, and the contact of the three resistors is used to input SPWM, and SPWM is a square wave whose duty cycle changes according to the sine law , After the SPWM is generated by the microcontroller, the sine wave signal can be generated after the SPWM filter circuit.
  • the voice driving circuit 6 is composed of a resistor R12, an LED indicator light and a voice chip U7, and the voice chip U7 can choose WT588D with a built-in flash memory for storing voice content.
  • the power amplifier circuit 7 is composed of a thirteenth resistor R13, a twentieth capacitor C20, and a power amplifier chip U6.
  • the power amplifier chip U6 can be an NS4165 chip.
  • the SPWM filter circuit 5 is used to generate 700HZ sine wave output
  • the voice drive circuit 6 is used to generate voice output.
  • Two different output modes are amplified by the power amplifier circuit 7 to play different voices. The two are selected by the thirty-first resistor R31. When the thirty-first resistor R31 is short-circuited, the power amplifier circuit 7 inputs a 700HZ sine wave. When the thirty-first resistor R31 is turned on, the power amplifier circuit 7 inputs the voice output of the voice driving circuit 6 . Shorting and disconnecting the resistors requires manual operation.
  • the principle of adjusting the loudspeaker output according to the environmental noise is as follows: the MCU main control module samples the electrical signal fed back by the environmental noise acquisition module through the ADC, and after the sampling is filtered by a series of software such as extreme value calculation and recursive averaging, the obtained The quantized noise level is converted into a decibel value through a conversion table, and the MCU main control module adjusts the speaker volume to a decibel value slightly higher than the noise decibel value according to the noise decibel value.
  • the period parameter determines whether to output voice: if the volume of the current period is non-zero, the voice prompter will sound and will change with the ambient noise; if the volume of the current period is zero, the voice prompter will enter the disabled sound status.
  • the MCU main control module obtains the phase information of the signal machine fed back by the phase acquisition module, and selects the voice file corresponding to the phase in the voice module, converts the audio file into an electrical signal through the voice module, and then amplifies it through the voice and then outputs it from the speaker .
  • the voice volume is determined by the working mode of the prompter: in the automatic mode, the prompter will automatically adjust the output voice volume according to the environmental noise level. When the environmental noise is large, the prompter will appropriately increase the voice output volume. The prompter will appropriately reduce the voice output volume; when working in the fixed mode, the prompter will set the volume of the output voice according to the volume of the current time period.

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Abstract

一种盲人语音过街提示器系统，包括电源模块、MCU主控模块、噪声采集模块、语音模块、扬声器、时钟模块、相位采集模块。MCU主控模块用于控制整个系统。相位采集模块和噪声采集模块的输出端与MCU主控模块电性连接。语音模块的输入端与MCU主控模块电性连接，输出端与扬声器电性连接，扬声器用于播放语音。时钟模块的输出端与MCU主控模块电性连接。电源模块为整个提示器系统提供工作电源。

Description

一种盲人语音过街提示器系统 技术领域
本申请涉及交通设备领域，尤其是一种盲人语音过街提示器系统。
背景技术
目前，盲人语音提示器作为一种人性化的交通设备已经被广泛应用，为盲人出行提供了便利。但是目前市面大多数盲人语音提示器功能单一，提示音会影响到周边居民正常生活。
发明内容
为解决上述技术问题，本申请提供了一种盲人语音过街提示器系统，该提示器能够根据所处时段或者根据环境噪音等级自动调整扬声器输出音量。
本申请采用如下技术方案：一种盲人语音过街提示器系统，包括：
MCU主控模块，控制整个提示器系统；
相位采集模块，输出端与MCU主控模块电性连接，用于获取信号机当前相位信息；
噪声采集模块，输出端与MCU主控模块电性连接，用于采集现场环境噪音等级；
语音模块，输入端与MCU主控模块电性连接，用于存储语音文件，将其转换为电信号并放大；
扬声器，输入端与语音模块电性连接，用于播放语音；
时钟模块，输出端与MCU主控模块电性连接，为MCU主控模块提供时钟源；
电源模块，为整个提示器系统提供工作电源。
进一步地，还包括掉电存储模块，所述掉电存储模块与MCU主控模块电性连接，用于保存设置的时段参数、信号灯状态信息和相位断电信息。
进一步地，所述噪声采集模块包括噪音采集电路、噪音放大电路和控制电路，所述噪音放大电路输入端电性连接噪音采集电路，所述控制电路电性连接噪音放大电路。
进一步地，所述噪音放大电路包括比例运算放大器与滤波电路，所述比例运算放大器3输出端电性连接滤波电路输入端。
进一步地，所述滤波电路包括第一肖基特二极管、第二肖基特二极管、第三电容和第五电阻，所述第一肖基特二极管与第二肖基特二极管正向串联，所述第三电容与第五电阻并联与正向串联的第一肖基特二极管、第二肖基特二极管并联，所述第一肖基特二极管与第二肖基特二极管的连接点连接滤波电路4输出端。
进一步地，所述比例运算放大器与滤波电路之间设置有第二电容，用于屏 蔽前级直流偏置。
进一步地，所述控制电路包括第四电阻和三极管,所述三极管基级串联第四电阻，集电极连接滤波电路，发射极接地。
进一步地，还包括通信模块，所述通信模块与MCU主控模块电性连接，包括串口RS232、GPS模块、无线模块和网口。
进一步地，所述语音模块包括SPWM滤波电路、语音驱动电路和功放电路，所述SPWM滤波电路输入端输入方波，输出端连接功放电路，所述语音驱动电路连接MCU主控模块，输出端连接功放电路。
本申请的有益效果：
1)盲人语音提示器可以工作在自动模式和固定模式，自动模式下根据环境噪音改变输出音量，固定模式下根据预先设置的时段音量进行语音输出。工作方式可以灵活切换，支持手机APP、电脑上位机和按键修改。
2)盲人语音提示器可以通过检测环境噪音自动增减输出语音的音量，在环境噪音大时，提示器会相应提高语音输出音量，在环境噪音小时，提示器会减小相应语音输出音量。不会对周围居民生活造成影响。
3)盲人语音提示器扩展网络接口，支持远程喊话功能，在应急、抢险时可以作为网络广播终端。
附图说明
图1为本申请的原理框图。
图2为本申请的环境噪音采集电路原理框图。
具体实施方式
下面结合具体附图和实施例对本申请作进一步说明。
如图1所示，在一个实施例中，本申请包括：电源模块、MCU主控模块、噪声采集模块、相位采集模块、语音模块、扬声器、时钟模块、电源模块，MCU主控模块作为整个提示器的中央处理模块，用于控制整个系统。相位采集模块与噪声采集模块的输出端与MCU主控模块电性连接，相位采集模块，用于获取信号机当前的相位信息，噪声采集模块则用于采集现场的环境噪声等级。语音模块的输入端与MCU主控模块电性连接，输出端与扬声器电性连接，语音模块包括语音芯片和音频放大电路，扬声器则用于播放语音。时钟模块，输出端与MCU主控模块电性连接，为MCU主控模块提供时钟源。电源模块，为整个提示器系统提供工作电源。
本申请能够进一步设置通信模块，所述通信模块与MCU主控模块电性连接，包括串口RS232、GPS模块、无线模块和网口。串口RS232与上位机软件通信，支持在线校时和修改系统工作参数信息；GPS模块为时钟模块提供脱机校时和远程定位功能；扩展网络接口，支持远程喊话。
本申请能够进一步设置掉电存储模块，所述掉电存储模块与MCU主控模块 电性连接，能够在断电时及时保存设置的时段参数、信号灯状态信息和相位断电信息。
在一个实施例中，本申请的噪声采集模块如图2所示，包括噪音采集电路1、噪音放大电路和控制电路2，所述噪音放大电路输入端电性连接噪音采集电路1，控制电路2电性连接噪声放大电路。噪音采集电路1包括咪头MIC与电阻R1，电阻R1上拉到电源，为MIC咪头提供稳定的信号输出。
在一个实施例中，所述噪音放大电路可以采用图2中的结构，包括比例运算放大器3与滤波电路4，所述比例运算放大器3输出端电性连接滤波电路4输入端。
进一步设置，比例运算放大器3可以采用图2中的结构：包括第二电阻R2、第三电阻R3和第一运放U1A，第三电阻R3两端分别连接第一运放U1A的负输入端与正输入端，第二电阻R2一端电性连接第一运放U1A的负输入端，另一端接地。第一运放U1A的输出端连接滤波电路4输入端。比例运算放大器3将咪头MIC采集的微弱电信号按比例放大。在第二电阻R2接地一端设置第一电容C1，第一电容C1耦合接地。
在一个实施例中，滤波电路4包括第一肖基特二极管D1、第二肖基特二极管D2、第三电容C3和第五电阻R5，所述第一肖基特二极管D1与第二肖基特二极管D2正向串联，第一肖基特二极管D1与第二肖基特二极管D2的连接接点作为该滤波电路4的输入端，与比例运算放大器3的输出端连接。所述第三电容C3与第五电阻R5并联与正向串联的第一肖基特二极管D1、第二肖基特二极管D2并联，第一肖基特二极管D1的正极接地。滤波电路4对放大后的噪音进行滤波，MCU主控模块通过ADC对滤波后的稳定噪声信号进行采样(图2中MIC_AD信号为稳定噪声信号)。比例运算放大器3与滤波电路4之间设置有第二电容C2，用于屏蔽前级直流偏置，即屏蔽比例运算放大器3的直流偏置。
在一个实施例中，控制电路2包括第四电阻R4和三极管Q1,所述三极管Q1基级串联第四电阻R4，集电极连接滤波电路输入端，发射极接地。第四电阻R4与三极管Q1基级的相反端连接MCU主控模块，控制信号为图2中EN_AD。
在一个实施例中，如图3所示，所述语音模块包括SPWM滤波电路5、语音驱动电路6和功放电路7，所述SPWM滤波电路5输入端输入方波，输出端连接功放电路7，所述语音驱动电路6连接MCU主控模块，输出端连接功放电路7。其中，SPWM滤波电路5包括第三十电阻R30、第三十五电阻R35、第三十六电阻R36、第三十六电容C36、第二运放U10B，所述第三十电阻R30一端连接3.3V电源，另一端连接第三十五电阻R35和第三十六电阻R36的一端，第三十五电阻R35的另一端接地，第三十六电阻R36的另一端连接第二运放U10B的正输入端。第三十六电容的第一端连接第二运放U10B的正输入端，另一端接地。所述 第二运放U10B的负输入端短接输出端并且输出端连接第三十一电阻R31，三个电阻的接点用于输入SPWM，SPWM是一种占空比按正弦规律变化的方波，SPWM由单片机产生后，经过SPWM滤波电路后即可产生正弦波信号。语音驱动电路6包括电阻R12、LED指示灯和语音芯片U7组成，语音芯片U7可选择WT588D内置有flash存储器，用于存储语音内容。功放电路7包括第十三电阻R13、第二十电容C20、功放芯片U6组成，功放芯片U6可以选用NS4165芯片。基于上述内容，SPWM滤波电路5用来产生700HZ正弦波输出，语音驱动电路6用来产生语音输出。两种不同的输出方式通过功放电路7放大后播放不同的语音，两者通过第三十一电阻R31来选择，当短接第三十一电阻R31时，功放电路7输入700HZ正弦波，当断开第三十一电阻R31时，功放电路7输入语音驱动电路6的语音输出。短接与断开电阻，需要人工进行操作。
本申请中，根据环境噪音调整扬声器输出的原理如下：MCU主控模块通过ADC对环境噪音采集模块反馈的电信号进行采样，采样后通过求极值、递推平均等一系列软件滤波后，得到量化后的噪音等级，将量化后的噪音等级经过一个转换表转换成分贝值，MCU主控模块根据噪音分贝值将扬声器音量调整至稍高于噪音的分贝值。在自动模式下，时段参数也会决定是否输出语音：如果当前时段音量非零，则语音提示器会发出声响，并且会随着环境噪音变化；如果当前时段音量为零，则语音提示器进入禁音状态。
基于上述，MCU主控模块获取相位采集模块反馈过来的信号机相位信息，并选择语音模块中与相位对应的语音文件，通过语音模块将音频文件转换成电信号，再通过语音放大后由扬声器输出。语音音量由提示器工作方式决定：工作于自动模式下，提示器会根据环境噪音等级自动调整输出语音音量大小，在环境噪音大时，提示器会适当提高语音输出音量，在环境噪音小时，提示器会适当减小语音输出音量；工作于固定模式下，提示器会根据当前所处时段的音量大小设置输出语音音量的大小。
最后所应说明的是，以上具体实施方式仅用以说明本申请的技术方案而非限制，尽管参照实例对本申请进行了详细说明，本领域的普通技术人员应当理解，可以对本申请的技术方案进行修改或者等同替换，而不脱离本申请技术方案的精神和范围，其均应涵盖在本申请的权利要求范围当中。

Claims (9)

  1. 一种盲人语音过街提示器系统，其特征在于，包括：
    MCU主控模块，控制整个提示器系统；
    相位采集模块，输出端与MCU主控模块电性连接，用于获取信号机当前相位信息；
    噪声采集模块，输出端与MCU主控模块电性连接，用于采集现场环境噪音等级；
    语音模块，输入端与MCU主控模块电性连接，用于存储语音文件，将其转换为电信号并放大；
    扬声器，输入端与语音模块电性连接，用于播放语音；
    时钟模块，输出端与MCU主控模块电性连接，为MCU主控模块提供时钟源；
    电源模块，为整个提示器系统提供工作电源。
  2. 如权利要求1所述的一种盲人语音过街提示器系统，其特征在于，还包括掉电存储模块，所述掉电存储模块与MCU主控模块电性连接，用于保存设置的时段参数、信号灯状态信息和相位断电信息。
  3. 如权利要求1所述的一种盲人语音过街提示器系统，其特征在于，所述噪声采集模块包括噪音采集电路(1)、噪音放大电路和控制电路(2)，所述噪音放大电路输入端电性连接噪音采集电路(1)，所述控制电路(2)电性连接噪音放大电路。
  4. 如权利要求3所述的一种盲人语音过街提示器系统，其特征在于，所述噪音放大电路包括比例运算放大器(3)与滤波电路(4)，所述比例运算放大器(3)输出端电性连接滤波电路(4)输入端。
  5. 如权利要求4所述的一种盲人语音过街提示器系统，其特征在于，所述滤波电路包括第一肖基特二极管、第二肖基特二极管、第三电容和第五电阻，所述第一肖基特二极管与第二肖基特二极管正向串联，所述第三电容与第五电阻并联与正向串联的第一肖基特二极管、第二肖基特二极管并联，所述第一肖基特二极管与第二肖基特二极管的连接点连接滤波电路(4)输出端。
  6. 如权利要求5所述的一种盲人语音过街提示器系统，其特征在于，所述比例运算放大器(3)与滤波电路(4)之间设置有第二电容，用于屏蔽比例运算放大器(3)的直流偏置。
  7. 如权利要求3所述的一种盲人语音过街提示器系统，其特征在于，所述控制电路(2)包括第四电阻和三极管,所述三极管基级串联第四电阻，集电极连接滤波电路(4)输入端，发射极接地，所述第四电阻与三极管Q1基级连接的相反端与MCU主控模块连接。
  8. 如权利要求1所述的一种盲人语音过街提示器系统，其特征在于，还包 括通信模块，所述通信模块与MCU主控模块电性连接。
  9. 如权利要求1所述的一种盲人语音过街提示器系统，其特征在于，所述语音模块包括SPWM滤波电路(5)、语音驱动电路(6)和功放电路(7)，所述SPWM滤波电路(5)输入端输入方波，输出端连接功放电路(7)，所述语音驱动电路(6)连接MCU主控模块，输出端连接功放电路(7)。
PCT/CN2021/139494 2021-11-03 2021-12-20 一种盲人语音过街提示器系统 WO2023077629A1 (zh)

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