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TI工程师以及大侠们帮我看看我的ads1292R CH2采集到的波形

Handler_wang
Prodigy 60 points
Other Parts Discussed in Thread: ADS1292

我的配置如下：

ADS1292_Command(ADS1292_CMD_SDATAC);
ConfigRegs0[0][ADS1292_Configuration_Register1]=0x01; //fMOD/512 250SPS
ConfigRegs0[0][ADS1292_Configuration_Register2]=0xa0; //
/*1 = Reference buffer is enabled 1 = Oscillator clock output enabled 1 = On; amplitude = ±(VREFP – VREFN) / 2400 1 = Square wave at 1 Hz*/
ConfigRegs0[0][ADS1292_LeadOff_Control_Register]=0x10;
ConfigRegs0[0][ADS1292_Channel1_Settings]=0x00;//PGA gain =6; 0000 = Normal electrode input (default) 0101 test signal
ConfigRegs0[0][ADS1292_Channel2_Settings]=0x50;//PGA gain =6; 0000 = Normal electrode input (default)
ConfigRegs0[0][ADS1292_RightLegDriveSenseSelection]=0x00;
ConfigRegs0[0][ADS1292_LeadOff_Sense_Selection]=0x00;
ConfigRegs0[0][ADS1292_LeadOff_Status]=0x00;
ConfigRegs0[0][ADS1292_RespirationControlRegister1]=0x02;
ConfigRegs0[0][ADS1292_RespirationControlRegister2]=0x00;
ConfigRegs0[0][ADS1292_General_PurposeIO_Register]=0x00;

采集到的数据放到excel里面画了个图如下：

仿佛有震荡存在。

我用万用表检测下图中C9两端对地的电压时（PGA2P、PGA2N），电压在0.7V到1V多跳动，请问这是什么原因？

我整个原理图如下：

  • 0
    Prodigy 60 points

    是工频干扰吗  我试着加一下右腿驱动  

  • 0
    Prodigy 60 points

    现在 配置成这样了  

    ADS1292_Command(ADS1292_CMD_SDATAC);
    ConfigRegs0[0][ADS1292_Configuration_Register1]=0x02; //fMOD/512 250SPS
    ConfigRegs0[0][ADS1292_Configuration_Register2]=0xE0; //
    /*1 = Reference buffer is enabled 1 = Oscillator clock output enabled 1 = On; amplitude = ±(VREFP – VREFN) / 2400 1 = Square wave at 1 Hz*/
    ConfigRegs0[0][ADS1292_LeadOff_Control_Register]=0xF0;
    ConfigRegs0[0][ADS1292_Channel1_Settings]=0x00;//PGA gain =6; 0000 = Normal electrode input (default) 0101 test signal
    ConfigRegs0[0][ADS1292_Channel2_Settings]=0x00;//PGA gain =6; 0000 = Normal electrode input (default)
    ConfigRegs0[0][ADS1292_RightLegDriveSenseSelection]=0xEF;//0x0c
    ConfigRegs0[0][ADS1292_LeadOff_Sense_Selection]=0x0F;
    ConfigRegs0[0][ADS1292_LeadOff_Status]=0x00;
    ConfigRegs0[0][ADS1292_RespirationControlRegister1]=0xEA;
    ConfigRegs0[0][ADS1292_RespirationControlRegister2]=0x03;
    //ConfigRegs0[0][ADS1292_General_PurposeIO_Register]=0x00;

    波形好多了

  • 0 回复 Handler_wang
    TI__Expert 7190 points

    您可以不用交流供电，验证一下是不是工频干扰。

  • 0 回复 Iven Xu
    Prodigy 60 points

    我是电池供电的，但是工频机器谐波都存在