Implementation plan:
1) After being amplified by a filter, the Col1 coil signal is filtered to remove the 50Hz power frequency signal, becoming a single-ended N signal. It is then converted from a single-ended signal to a differential signal, resulting in Adc1_N
2) After being amplified by a filter, the Col2 coil signal is filtered to remove the 50Hz power frequency signal, becoming a single-ended P signal. It is then converted from a single-ended signal to a differential signal, resulting in Adc1_P
3) The ADC1_PN signal is connected to the differential ADC chip, and the signal of channel 1 is read through SPI. If there is a large signal, it indicates the presence of a blade signal. Otherwise, coil 1 and coil 2 do not detect the blade signal.
Description: The common mode voltage difference and signal difference between coils 1 and 2 are directly calculated by the hardware circuit itself. No software calculation is required. The software only needs to read the average value to find the lowest signal threshold of the blade.
Implementation plan:
1) After being amplified by a filter, the Col1 coil signal is filtered to remove the 50Hz power frequency signal, becoming a single-ended N signal. It is then converted from a single-ended signal to a differential signal, resulting in Adc1_N
2) After being amplified by a filter, the Col2 coil signal is filtered to remove the 50Hz power frequency signal, becoming a single-ended P signal. It is then converted from a single-ended signal to a differential signal, resulting in Adc1_P
3) The ADC1_PN signal is connected to the differential ADC chip, and the signal of channel 1 is read through SPI. If there is a large signal, it indicates the presence of a blade signal. Otherwise, coil 1 and coil 2 do not detect the blade signal.
Description: The common mode voltage difference and signal difference between coils 1 and 2 are directly calculated by the hardware circuit itself. No software calculation is required. The software only needs to read the average value to find the lowest signal threshold of the blade.
Implementation plan:
1) After being amplified by a filter, the Col1 coil signal is filtered to remove the 50Hz power frequency signal, becoming a single-ended N signal. It is then converted from a single-ended signal to a differential signal, resulting in Adc1_N
2) After being amplified by a filter, the Col2 coil signal is filtered to remove the 50Hz power frequency signal, becoming a single-ended P signal. It is then converted from a single-ended signal to a differential signal, resulting in Adc1_P
3) The ADC1_PN signal is connected to the differential ADC chip, and the signal of channel 1 is read through SPI. If there is a large signal, it indicates the presence of a blade signal. Otherwise, coil 1 and coil 2 do not detect the blade signal.
Description: The common mode voltage difference and signal difference between coils 1 and 2 are directly calculated by the hardware circuit itself. No software calculation is required. The software only needs to read the average value to find the lowest signal threshold of the blade.
