A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Automobile power window ripple anti-pinch circuit
The invention relates to an automobile power window ripple anti-pinch circuit which comprises an MCU and a ripple sampling circuit. The ripple sampling circuit comprises a differential amplification circuit, a first-order low-pass filtering circuit, a second-order low-pass filtering circuit, a ripple wave-to-square wave circuit and a triode voltage conversion circuit; voltage drop is generated at two ends of a differential amplification sampling resistor; the first-order low-pass filtering circuit is used for filtering waveforms after differential amplification and outputting two paths of first-order filtering signals at the same time; the second-order low-pass filtering circuit filters one path of first-order filtering signals and transmits the first-order filtering signals to the MCU for judging the size of the working current of a motor; the ripple wave-to-square wave circuit is used for converting the other path of first-order filtering signals and second-order filtering signals into square wave signals; and the triode voltage conversion circuit is used for converting the square wave signals into square wave signals with voltage the same as MCU power supply voltage and transmitting the square wave signals to the MCU. By the adoption of the technical scheme, ripple wave signals are converted into the square wave signals through a hardware circuit, software operation is reduced, MCU resources are saved, and the MCU cost is reduced.
本发明涉及一种汽车电动车窗纹波防夹电路，包含MCU以及纹波采样电路，所述纹波采样电路包含差分放大电路，差分放大采样电阻两端产生的电压降；一阶低通滤波电路，过滤差分放大后的波形，同时输出两路一阶滤波信号；二阶低通滤波电路，过滤其中一路一阶滤波信号并输送至MCU，用于判断电机工作电流大小；纹波转方波电路，将另一路一阶滤波信号以及二阶滤波信号转换成方波信号；三极管电压转换电路，将方波信号电压转换成与MCU供电电压相同的方波信号，并输送至MCU。采用上述技术方案，其通过硬件电路将纹波信号转换为方波信号，减少软件运算，节约MCU资源，降低MCU成本。
Automobile power window ripple anti-pinch circuit
The invention relates to an automobile power window ripple anti-pinch circuit which comprises an MCU and a ripple sampling circuit. The ripple sampling circuit comprises a differential amplification circuit, a first-order low-pass filtering circuit, a second-order low-pass filtering circuit, a ripple wave-to-square wave circuit and a triode voltage conversion circuit; voltage drop is generated at two ends of a differential amplification sampling resistor; the first-order low-pass filtering circuit is used for filtering waveforms after differential amplification and outputting two paths of first-order filtering signals at the same time; the second-order low-pass filtering circuit filters one path of first-order filtering signals and transmits the first-order filtering signals to the MCU for judging the size of the working current of a motor; the ripple wave-to-square wave circuit is used for converting the other path of first-order filtering signals and second-order filtering signals into square wave signals; and the triode voltage conversion circuit is used for converting the square wave signals into square wave signals with voltage the same as MCU power supply voltage and transmitting the square wave signals to the MCU. By the adoption of the technical scheme, ripple wave signals are converted into the square wave signals through a hardware circuit, software operation is reduced, MCU resources are saved, and the MCU cost is reduced.
本发明涉及一种汽车电动车窗纹波防夹电路，包含MCU以及纹波采样电路，所述纹波采样电路包含差分放大电路，差分放大采样电阻两端产生的电压降；一阶低通滤波电路，过滤差分放大后的波形，同时输出两路一阶滤波信号；二阶低通滤波电路，过滤其中一路一阶滤波信号并输送至MCU，用于判断电机工作电流大小；纹波转方波电路，将另一路一阶滤波信号以及二阶滤波信号转换成方波信号；三极管电压转换电路，将方波信号电压转换成与MCU供电电压相同的方波信号，并输送至MCU。采用上述技术方案，其通过硬件电路将纹波信号转换为方波信号，减少软件运算，节约MCU资源，降低MCU成本。
Automobile power window ripple anti-pinch circuit
一种汽车电动车窗纹波防夹电路
FANG RUSHI (author) / CAO DEYOU (author) / CHENG YANGFAN (author) / XIAO XUDONG (author) / WANG KESHENG (author) / LIU KEBIN (author)
2021-09-21
Patent
Electronic Resource
Chinese
IPC:
E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
,
Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung
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